WHAT IS MICROPROCESSOR Microprocessor is a chip contains integrated circuit, which receives the signals from the operator, process and gives the output . Microprocessor (µP) controls the entire loco through 4 systems: 1. Excitation control system 2. Propulsion control system 3. Battery charging control system 4. Speed control system
MEDHA Microprocessor.ppt
Nov 29, 2015
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Transcript
WHAT IS MICROPROCESSOR
Microprocessor is a chip contains integrated circuit which receives the signals from the operator process and gives the output
Microprocessor (microP) controls the entire loco through 4 systems
1 Excitation control system
2 Propulsion control system
3 Battery charging control system
4 Speed control system
MEP-660 LOCOMOTIVE MEP-660 LOCOMOTIVE CONTROL SYSTEM CONTROL SYSTEM
Diesel Engine
Governor
Traction Alternator
Rectifier Panel
Power Contactors
Traction Motors
AuxGen
AG Control
Excitation Control
Propulsion Control
Engine Control
Exciter
MICRO PROCESSORCONTROL SYSTEM
TYPES OF MICROPROCESSOR LOCOS
There are two types of microprocessor locomotives in south central railway
1 MEDHA MICROPROCESSOR
2 GE MICROPROCESSOR
TYPES OF MICROPROCESSOR LOCOS
There are two types of microprocessor locomotives in south central railway
1 MEDHA MICROPROCESSOR
2 GE MICROPROCESSOR
MEDHA MICROPROCESSOR
List of Items Removed
1 Rotating machinesAxle Driven Alternator Tacho generator
List of Items Removed
2Control PanelsExcitation Control Panel (EXCP)Engine Control Panel (ECP)Voltage Regulator Panel (VRP)Transition Regulator Panel (TRP)
3Resistor Panels
Wheel slip resistor panel (WSRR1 amp 2)Wheel slip control resistors WR8 WR9 amp WR10Oscillator Voltage Dividing panel (OVDR)Generator Voltage Dividing panel (GVDRVDP)Tacho generator load resistor panel (TGLR)Braking limiting resistor panel (BKER1 amp 2)
4Relays Out of 23 relays 13 relays are eliminated amp 10 relays retained
s no Retained relays
1DMR DMR
2 ERR Renamed as SANDER
3 BSR Renamed as ALRTRB
4 CVR Renamed as CMR
5 TR Renamed as SLBRFSR
6 SR SR
7 BKR1
8 BKR2
9 BKR3
10 ALR1 AFLR
11 ALR2
12 ALR3
13 Timer Relay
14 WSR1
15 WSR2
16 WSR3
17 GR1
18 GR2
19 GFOLR
20 CKR1 Renamed as AGPR
21 CKR2 Renamed as EXPR
22 TDR
23 MVR MVR
5 MISCELLANEOUS ITEMS REMOVED
Transition Excitation Transformer (TET)
Armature Current control reactor (ACCR)
Stabilizing panel (Stab Panel)
Voltage regulator current limiting shunt (VRCLS)
Load ammeter shunt (LAS)
Engine Temperature Switches ndash TS1 TS2 TS3 and ETS
BREAKERS
DISPLAY UNIT
Startstop PB
INDICATION PANEL
Throttle
Load meter
ECS
ALERTER LAMP
DRIVERrsquoS CABIN
99
RBB LPB1 LPB2 DLCB HLPBDEB (Eng)
DEB (Car)
Keep Always ON
CEBRFCB PLPB FPB MPCB AGFB
MB2 MB1
Additional Breakers
NEWLY PROVIDED ITEMSCircuit BreakersThe nomenclatures of all the breakers and switches are almost all same as conventional WDG3A locomotive
Existing Breakers Lighting Circuit
Breakers LPB1 LPB2 HLPB DLCB
MB1 ndash Main Breaker 1MB2 ndash Main Breaker 2AGFB - Auxiliary Generator Field BreakerMFPB1amp2 - Master Fuel Pump BreakersMCB1amp2 - Master Control BreakersFPB ndash Fuel Pump BreakerCEB ndash Crankcase Exhauster BreakerDEB (Eng)- Dust Exhauster Breaker (Eng Side)DEB (Carb) - Dust Exhauster Breaker (Carb Side)RBB - Rectifier Blower BreakerRFCB - Radiator Fan Clutch Breaker (ERF)
MPCBMPCB - - Microprocessor circuit Microprocessor circuit breakerbreaker
PLPBPLPB - - Pre lubrication Pump Pre lubrication Pump BreakerBreaker
DO not switch OFF MPCBDO not switch OFF MPCBSwitch OFF MCB1 amp MCB2 Switch OFF MCB1 amp MCB2
while crankingwhile cranking
Extra (New) BreakersExtra (New) Breakers
EXTRA (NEW )SWITCHESEXTRA (NEW )SWITCHES
lsquolsquoTE LIMITrsquo switch provided TE LIMITrsquo switch provided on the CB panel near the on the CB panel near the compartment light compartment light switchesswitches For normal working keep this For normal working keep this
switch in lsquoswitch in lsquoNORMALrsquo NORMALrsquo position position To limit Tractive effort keep To limit Tractive effort keep
this switch in this switch in lsquoLIMITrsquo lsquoLIMITrsquo position position
WITH TE LIMIT SWITCH IN lsquoLIMITrsquo POSITION WHEN NOT REQUIRED
MAY RESULT IN STALLING OF TRAIN
1 Tractive Effort Limit Switch
1313
2 MOTOR CUTOUT 2 MOTOR CUTOUT SWITCHES SWITCHES
Conventional Rotary type Conventional Rotary type motor cut out switch is motor cut out switch is replaced with 6 individual replaced with 6 individual toggle switches toggle switches
MCOS1 MCOS2 MCOS3 MCOS1 MCOS2 MCOS3 MCOS4 MCOS5 amp MCOS6 MCOS4 MCOS5 amp MCOS6 These switches are located These switches are located
inside the control panel inside the control panel behind the left side door behind the left side door
Normally all these switches Normally all these switches are in are in ON ON (down) position (down) position
Loco Pilot can switch OFF Loco Pilot can switch OFF the required MCOS switches the required MCOS switches up to 5 at a time up to 5 at a time
SENSOR S amp LOCATION
Current sensors(14) --- provided at front panelVoltage sensors (5) --- provided at back panelTemperature sensors(3) --- Two provided in Expresser room and
one is provided in back panelPressure sensors(5) --- provided at nose compartmentSpeed sensors(7) --- six connected to each TM and one connected (ESS) to left cam gear cover
ENGINE SPEED SENSOR (ESS)
VCD Isolation switch
RELAYSGR1amp2 Cut out switch
ADBS4 Nos
CONTROL UNIT
MICRO PROCESSOR FRONT PANNEL
MICRO PROCESSOR CONTROL UNIT
bullThis is the main control equipment in the Microprocessor control system
bullThis is located at the Front panel in the place of ECP
bullThe total control system is functionally divided into different modules
bullThese modules are dustproof amp plug in type cards for easy replacement
bullThe connectors of these modules are unique They can not be inserted at wrong place
bullIt is having 19 cards
MEDHA MICRO PROCESSOR DISPLAY UNIT
It is provided at left side of ECS switch on the control panel Display unit is the main interface between the user and the equipment It displays group wise parameters of the locomotive as selected by driver user It displays fault messages Digital inputs and outputs can be tested through the unit
Main MenuMain Menu
2) Display Mode
4) Exit
1) Faults
3) Test Mode
Faults - Submenu
1 View Faults2 Clear Faults
2121
View Faults - SubmenuView Faults - SubmenuThe registered Faults at run time will be displayed The registered Faults at run time will be displayed
User can navigate through the faults using down User can navigate through the faults using down arrow till the following message is displayedarrow till the following message is displayed
lsquoNo More Faults Press Menu Key to exitrsquo
MENU
Clear Faults - SubmenuClear Faults - Submenu
The registered Faults at run time will be displayed User can navigate through the faults using down arrow key and clear the faults by pressing lsquo0rsquo key Till the following message is displayed
Use lsquo0rsquo key to Clear
Depending upon the level of the fault the display prompts pass code for some faults to clear them After entering the valid pass code the fault can be cleared
No More Faults Press Menu Key to exit
MENU
Display Mode SubmenuDisplay Mode Submenu
1 Excitation
2 Auxiliary
3 Wheel Slip
4 Mixed
MENU
5 Driver Display6 MCBG status
7 Collective Data8 Digital inputs
MENU
Display Mode SubmenuDisplay Mode Submenu
9 Digital Outputs10 HP status
MENU
Test ModeTest Mode
NOT APPLICABLE TO LOCO PILOTS
DRIVER DISPLAY
The Driver default display has got three screens
1 IDLE Screen2 Motoring Screen3 Braking Screen
Respective screens are changed automatically based on the control stand signals while the locomotive operation is being set by the Driver
In each screen relative parameters are displayed as shown below
ADB(Analog distribution box)
There are 4 Analog Distribution BoxesThese are located at Front panel in the place of VRPTRP
Each ADB Unit generates isolated low voltage source required for the sensors connected to it from the locomotive control voltage of 72V
Each ADB can handle 8 analog inputs from various sensors and transmit them to the Control unit
RDB(RPM Distribution box)
bullRPM Distribution Unit is similar to the Analog Distribution Unit but handles RPM signals
bullThis is located at Front panel in the place of VRPTRP
bullAll the six traction motor RPM sensors are connected to this RDB
ADDITIONAL FEATURES WITH MEP-6601 Limitation of Power to 4th notch with Failure of Dust Exhauster BreakersFailure of dust exhauster motors clog the filters and Quantity of inlet air is reduced Hence the power is limited to 4th notch along with a warning message if the notch above 4th notch
2 Limitation of Power to 4th notch with Failure of RBB or Diode HOTFailure of RBB result in no cooling to power rectifier Similarly if amount of cooling to Rectifier diodes is less due to ay reasons the diodes become HOT In order to safeguard the power rectifier the engine power is restricted to 4th notch
3 Cold Engine based loadingSoon after cranking the engine speed is restricted based on the lube oil temperature till the lube oil temperature is raised up to 60 degcent To improve lubrication
4 Power De-ration from T3 setting to T4 setting (90 to 95 degCent)The engine power is de-rated by 20 of the notch power for every degree raise from 90 deg Onwards
5 8th notch RPM at hottest TemperatureWhen the Engine temperature reached to T4 setting (95 Deg Cen) Engine RPM is raised to 8th notch automatically by cutting of power for faster cooling of engine
6LOW IDLE FEATURE
When the locomotive is in IDLE for more than 10 minutes the engine RPM is reduced to 350 by energising AV and DV for reducing the fuel oil consumption This is posssible only with governors having this option
7Built in Auto switching ON Flasher lights with Simplified circuit
8Self Load box Testing
9Ambient temperature based battery charging
10Event recorder
11Prelubrication
12MULTI RESET VIGILANCE CONTROL DEVICE One VCD reset push button is provided on the control desk near Master handle
MULTI RESET VIGILANCE CONTROL DEVICE
WHY VCD
To stop the train If driver is INCAPACITATED An intelligent vigilance control device with multi-reset feature has
been provided to stop the train if the driver is incapacitated
1048714 The device alerts the driver for every 60 seconds before stopping train If the driver is not alert incapacitated VCD applies there by Engine will come to Idle and penalty brakes will be applied and the train stops
1048714 One VCD alerting lamp provided on each control desk near LED indication panel
1048714 One VCD reset push button is provided on the control desk near master handle
VCD disable unit is provided in the Control PanelPenalty brake application Valve is provided in nose compartment
VCD STARTS FUNCTION
Soon after circuit breakers MB1 MB2 MPCB MFPB1 MFPB2 MCB1 ampMCB2 are switched ON and BCP is less than 21 Kg Sqcm
VCD DOES NOT FUNCTION
If BCP is more than 21 KgSqcm and Loco speed is zero
What VCD do before Penalty BrakesVCD alerts the driver once in every 60 seconds through a Blinking LEDif none of the following activities are performed with in 60 sec1048714 Increase Decrease notch1048708 Application Release of A91048708 Application release of DB1048708 Change of DB level1048708 Operation of GF switches1048708 Change of RH position1048708 Operation of Horn buttons1048708 Operation of Sander buttons1048708 Pressing of VCD reset button
What Driver has to doPerform any of the following loco operations as required or Press VCDRESET button to suppress warning lamp
What if Driver does not respond to VCD warnings
1048708 The Blinking LED continues for 17 seconds1048708 After 17 seconds a buzzer is switched ON along with Blinking LED1048708 A message lsquo 2019 - VCD time out Press VCD reset switchrsquo is displayed on the screen1048708 The blinking LED and buzzer continues for another 17 seconds
What if Driver does not respond up to 94 seconds
The MEP-660 assumes that the driver is dead incapacitated and appliesPenalty Brakes after 94 (60+17+17) seconds and the following changes takesplace in the locomotive1 A message lsquo2301 - VCD Applied Penalty Brakesrsquo will be displayed on the Display Panel2 VCD counter is increased by 13 Buzzer is switched OFF4 LED continue to blink for another 35sec5 BP is reduced to 28 KgSqcm6 Loco Formation brakes are applied7 Engine speed is brought to IDLE8 GF power contactor is dropped out9 Power contactors are dropped out after Master handle brought to IDLE
FOR RELEASING THE PENALTY BRAKES
1 Bring the Throttle to IDLE2 Wait till the blinking LED is OFF3 Wait till the Loco speed is reduced to zero4 Press VCD RESET button
WHILE WAITING FOR SIGNAL IN THE YARD
Apply loco brakes with SA9 to suppress VCD function Ensure BCP is morethan 21 kgSqcm
NOTEbull Always press lsquoVCD resetrsquo switch whenever lsquoVCD LEDrsquo is blinkingbull Donrsquot forget to apply loco brakes while loco is in stand
THE microP LOCOMOTIVE IS WORKING AS REAR LOCOMOTIVE IN MU OPERATION
1 While the locomotive is working as rear loco in MU operation the VCD is not required2 The circuit breakers MCB1 and MCB2 which are available on control desks of Rear Loco should be switched off after making MU set up3 The VCD function is automatically isolated in rear loco and the display shows lsquoVCD in MUrsquo message in the 4th line indicating the status of the VCD4 otherwise ndash What happens 5 Rear loco does not respond to lead loco signalsVCD counterAn incrementing counter by name lsquoVCD Counterrsquo is added in the displayscreen This parameter is visible only when the loco is in idle position Thecount is incremented by one as and when the VCD applies penalty brakeindicating that the driver is not alert
NOTE Please note the reading of this lsquoVCD Counterrsquo on the display unit andrecord the same in the driverrsquos logbook while taking over charge of thelocomotive
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
MEP-660 LOCOMOTIVE MEP-660 LOCOMOTIVE CONTROL SYSTEM CONTROL SYSTEM
Diesel Engine
Governor
Traction Alternator
Rectifier Panel
Power Contactors
Traction Motors
AuxGen
AG Control
Excitation Control
Propulsion Control
Engine Control
Exciter
MICRO PROCESSORCONTROL SYSTEM
TYPES OF MICROPROCESSOR LOCOS
There are two types of microprocessor locomotives in south central railway
1 MEDHA MICROPROCESSOR
2 GE MICROPROCESSOR
TYPES OF MICROPROCESSOR LOCOS
There are two types of microprocessor locomotives in south central railway
1 MEDHA MICROPROCESSOR
2 GE MICROPROCESSOR
MEDHA MICROPROCESSOR
List of Items Removed
1 Rotating machinesAxle Driven Alternator Tacho generator
List of Items Removed
2Control PanelsExcitation Control Panel (EXCP)Engine Control Panel (ECP)Voltage Regulator Panel (VRP)Transition Regulator Panel (TRP)
3Resistor Panels
Wheel slip resistor panel (WSRR1 amp 2)Wheel slip control resistors WR8 WR9 amp WR10Oscillator Voltage Dividing panel (OVDR)Generator Voltage Dividing panel (GVDRVDP)Tacho generator load resistor panel (TGLR)Braking limiting resistor panel (BKER1 amp 2)
4Relays Out of 23 relays 13 relays are eliminated amp 10 relays retained
s no Retained relays
1DMR DMR
2 ERR Renamed as SANDER
3 BSR Renamed as ALRTRB
4 CVR Renamed as CMR
5 TR Renamed as SLBRFSR
6 SR SR
7 BKR1
8 BKR2
9 BKR3
10 ALR1 AFLR
11 ALR2
12 ALR3
13 Timer Relay
14 WSR1
15 WSR2
16 WSR3
17 GR1
18 GR2
19 GFOLR
20 CKR1 Renamed as AGPR
21 CKR2 Renamed as EXPR
22 TDR
23 MVR MVR
5 MISCELLANEOUS ITEMS REMOVED
Transition Excitation Transformer (TET)
Armature Current control reactor (ACCR)
Stabilizing panel (Stab Panel)
Voltage regulator current limiting shunt (VRCLS)
Load ammeter shunt (LAS)
Engine Temperature Switches ndash TS1 TS2 TS3 and ETS
BREAKERS
DISPLAY UNIT
Startstop PB
INDICATION PANEL
Throttle
Load meter
ECS
ALERTER LAMP
DRIVERrsquoS CABIN
99
RBB LPB1 LPB2 DLCB HLPBDEB (Eng)
DEB (Car)
Keep Always ON
CEBRFCB PLPB FPB MPCB AGFB
MB2 MB1
Additional Breakers
NEWLY PROVIDED ITEMSCircuit BreakersThe nomenclatures of all the breakers and switches are almost all same as conventional WDG3A locomotive
Existing Breakers Lighting Circuit
Breakers LPB1 LPB2 HLPB DLCB
MB1 ndash Main Breaker 1MB2 ndash Main Breaker 2AGFB - Auxiliary Generator Field BreakerMFPB1amp2 - Master Fuel Pump BreakersMCB1amp2 - Master Control BreakersFPB ndash Fuel Pump BreakerCEB ndash Crankcase Exhauster BreakerDEB (Eng)- Dust Exhauster Breaker (Eng Side)DEB (Carb) - Dust Exhauster Breaker (Carb Side)RBB - Rectifier Blower BreakerRFCB - Radiator Fan Clutch Breaker (ERF)
MPCBMPCB - - Microprocessor circuit Microprocessor circuit breakerbreaker
PLPBPLPB - - Pre lubrication Pump Pre lubrication Pump BreakerBreaker
DO not switch OFF MPCBDO not switch OFF MPCBSwitch OFF MCB1 amp MCB2 Switch OFF MCB1 amp MCB2
while crankingwhile cranking
Extra (New) BreakersExtra (New) Breakers
EXTRA (NEW )SWITCHESEXTRA (NEW )SWITCHES
lsquolsquoTE LIMITrsquo switch provided TE LIMITrsquo switch provided on the CB panel near the on the CB panel near the compartment light compartment light switchesswitches For normal working keep this For normal working keep this
switch in lsquoswitch in lsquoNORMALrsquo NORMALrsquo position position To limit Tractive effort keep To limit Tractive effort keep
this switch in this switch in lsquoLIMITrsquo lsquoLIMITrsquo position position
WITH TE LIMIT SWITCH IN lsquoLIMITrsquo POSITION WHEN NOT REQUIRED
MAY RESULT IN STALLING OF TRAIN
1 Tractive Effort Limit Switch
1313
2 MOTOR CUTOUT 2 MOTOR CUTOUT SWITCHES SWITCHES
Conventional Rotary type Conventional Rotary type motor cut out switch is motor cut out switch is replaced with 6 individual replaced with 6 individual toggle switches toggle switches
MCOS1 MCOS2 MCOS3 MCOS1 MCOS2 MCOS3 MCOS4 MCOS5 amp MCOS6 MCOS4 MCOS5 amp MCOS6 These switches are located These switches are located
inside the control panel inside the control panel behind the left side door behind the left side door
Normally all these switches Normally all these switches are in are in ON ON (down) position (down) position
Loco Pilot can switch OFF Loco Pilot can switch OFF the required MCOS switches the required MCOS switches up to 5 at a time up to 5 at a time
SENSOR S amp LOCATION
Current sensors(14) --- provided at front panelVoltage sensors (5) --- provided at back panelTemperature sensors(3) --- Two provided in Expresser room and
one is provided in back panelPressure sensors(5) --- provided at nose compartmentSpeed sensors(7) --- six connected to each TM and one connected (ESS) to left cam gear cover
ENGINE SPEED SENSOR (ESS)
VCD Isolation switch
RELAYSGR1amp2 Cut out switch
ADBS4 Nos
CONTROL UNIT
MICRO PROCESSOR FRONT PANNEL
MICRO PROCESSOR CONTROL UNIT
bullThis is the main control equipment in the Microprocessor control system
bullThis is located at the Front panel in the place of ECP
bullThe total control system is functionally divided into different modules
bullThese modules are dustproof amp plug in type cards for easy replacement
bullThe connectors of these modules are unique They can not be inserted at wrong place
bullIt is having 19 cards
MEDHA MICRO PROCESSOR DISPLAY UNIT
It is provided at left side of ECS switch on the control panel Display unit is the main interface between the user and the equipment It displays group wise parameters of the locomotive as selected by driver user It displays fault messages Digital inputs and outputs can be tested through the unit
Main MenuMain Menu
2) Display Mode
4) Exit
1) Faults
3) Test Mode
Faults - Submenu
1 View Faults2 Clear Faults
2121
View Faults - SubmenuView Faults - SubmenuThe registered Faults at run time will be displayed The registered Faults at run time will be displayed
User can navigate through the faults using down User can navigate through the faults using down arrow till the following message is displayedarrow till the following message is displayed
lsquoNo More Faults Press Menu Key to exitrsquo
MENU
Clear Faults - SubmenuClear Faults - Submenu
The registered Faults at run time will be displayed User can navigate through the faults using down arrow key and clear the faults by pressing lsquo0rsquo key Till the following message is displayed
Use lsquo0rsquo key to Clear
Depending upon the level of the fault the display prompts pass code for some faults to clear them After entering the valid pass code the fault can be cleared
No More Faults Press Menu Key to exit
MENU
Display Mode SubmenuDisplay Mode Submenu
1 Excitation
2 Auxiliary
3 Wheel Slip
4 Mixed
MENU
5 Driver Display6 MCBG status
7 Collective Data8 Digital inputs
MENU
Display Mode SubmenuDisplay Mode Submenu
9 Digital Outputs10 HP status
MENU
Test ModeTest Mode
NOT APPLICABLE TO LOCO PILOTS
DRIVER DISPLAY
The Driver default display has got three screens
1 IDLE Screen2 Motoring Screen3 Braking Screen
Respective screens are changed automatically based on the control stand signals while the locomotive operation is being set by the Driver
In each screen relative parameters are displayed as shown below
ADB(Analog distribution box)
There are 4 Analog Distribution BoxesThese are located at Front panel in the place of VRPTRP
Each ADB Unit generates isolated low voltage source required for the sensors connected to it from the locomotive control voltage of 72V
Each ADB can handle 8 analog inputs from various sensors and transmit them to the Control unit
RDB(RPM Distribution box)
bullRPM Distribution Unit is similar to the Analog Distribution Unit but handles RPM signals
bullThis is located at Front panel in the place of VRPTRP
bullAll the six traction motor RPM sensors are connected to this RDB
ADDITIONAL FEATURES WITH MEP-6601 Limitation of Power to 4th notch with Failure of Dust Exhauster BreakersFailure of dust exhauster motors clog the filters and Quantity of inlet air is reduced Hence the power is limited to 4th notch along with a warning message if the notch above 4th notch
2 Limitation of Power to 4th notch with Failure of RBB or Diode HOTFailure of RBB result in no cooling to power rectifier Similarly if amount of cooling to Rectifier diodes is less due to ay reasons the diodes become HOT In order to safeguard the power rectifier the engine power is restricted to 4th notch
3 Cold Engine based loadingSoon after cranking the engine speed is restricted based on the lube oil temperature till the lube oil temperature is raised up to 60 degcent To improve lubrication
4 Power De-ration from T3 setting to T4 setting (90 to 95 degCent)The engine power is de-rated by 20 of the notch power for every degree raise from 90 deg Onwards
5 8th notch RPM at hottest TemperatureWhen the Engine temperature reached to T4 setting (95 Deg Cen) Engine RPM is raised to 8th notch automatically by cutting of power for faster cooling of engine
6LOW IDLE FEATURE
When the locomotive is in IDLE for more than 10 minutes the engine RPM is reduced to 350 by energising AV and DV for reducing the fuel oil consumption This is posssible only with governors having this option
7Built in Auto switching ON Flasher lights with Simplified circuit
8Self Load box Testing
9Ambient temperature based battery charging
10Event recorder
11Prelubrication
12MULTI RESET VIGILANCE CONTROL DEVICE One VCD reset push button is provided on the control desk near Master handle
MULTI RESET VIGILANCE CONTROL DEVICE
WHY VCD
To stop the train If driver is INCAPACITATED An intelligent vigilance control device with multi-reset feature has
been provided to stop the train if the driver is incapacitated
1048714 The device alerts the driver for every 60 seconds before stopping train If the driver is not alert incapacitated VCD applies there by Engine will come to Idle and penalty brakes will be applied and the train stops
1048714 One VCD alerting lamp provided on each control desk near LED indication panel
1048714 One VCD reset push button is provided on the control desk near master handle
VCD disable unit is provided in the Control PanelPenalty brake application Valve is provided in nose compartment
VCD STARTS FUNCTION
Soon after circuit breakers MB1 MB2 MPCB MFPB1 MFPB2 MCB1 ampMCB2 are switched ON and BCP is less than 21 Kg Sqcm
VCD DOES NOT FUNCTION
If BCP is more than 21 KgSqcm and Loco speed is zero
What VCD do before Penalty BrakesVCD alerts the driver once in every 60 seconds through a Blinking LEDif none of the following activities are performed with in 60 sec1048714 Increase Decrease notch1048708 Application Release of A91048708 Application release of DB1048708 Change of DB level1048708 Operation of GF switches1048708 Change of RH position1048708 Operation of Horn buttons1048708 Operation of Sander buttons1048708 Pressing of VCD reset button
What Driver has to doPerform any of the following loco operations as required or Press VCDRESET button to suppress warning lamp
What if Driver does not respond to VCD warnings
1048708 The Blinking LED continues for 17 seconds1048708 After 17 seconds a buzzer is switched ON along with Blinking LED1048708 A message lsquo 2019 - VCD time out Press VCD reset switchrsquo is displayed on the screen1048708 The blinking LED and buzzer continues for another 17 seconds
What if Driver does not respond up to 94 seconds
The MEP-660 assumes that the driver is dead incapacitated and appliesPenalty Brakes after 94 (60+17+17) seconds and the following changes takesplace in the locomotive1 A message lsquo2301 - VCD Applied Penalty Brakesrsquo will be displayed on the Display Panel2 VCD counter is increased by 13 Buzzer is switched OFF4 LED continue to blink for another 35sec5 BP is reduced to 28 KgSqcm6 Loco Formation brakes are applied7 Engine speed is brought to IDLE8 GF power contactor is dropped out9 Power contactors are dropped out after Master handle brought to IDLE
FOR RELEASING THE PENALTY BRAKES
1 Bring the Throttle to IDLE2 Wait till the blinking LED is OFF3 Wait till the Loco speed is reduced to zero4 Press VCD RESET button
WHILE WAITING FOR SIGNAL IN THE YARD
Apply loco brakes with SA9 to suppress VCD function Ensure BCP is morethan 21 kgSqcm
NOTEbull Always press lsquoVCD resetrsquo switch whenever lsquoVCD LEDrsquo is blinkingbull Donrsquot forget to apply loco brakes while loco is in stand
THE microP LOCOMOTIVE IS WORKING AS REAR LOCOMOTIVE IN MU OPERATION
1 While the locomotive is working as rear loco in MU operation the VCD is not required2 The circuit breakers MCB1 and MCB2 which are available on control desks of Rear Loco should be switched off after making MU set up3 The VCD function is automatically isolated in rear loco and the display shows lsquoVCD in MUrsquo message in the 4th line indicating the status of the VCD4 otherwise ndash What happens 5 Rear loco does not respond to lead loco signalsVCD counterAn incrementing counter by name lsquoVCD Counterrsquo is added in the displayscreen This parameter is visible only when the loco is in idle position Thecount is incremented by one as and when the VCD applies penalty brakeindicating that the driver is not alert
NOTE Please note the reading of this lsquoVCD Counterrsquo on the display unit andrecord the same in the driverrsquos logbook while taking over charge of thelocomotive
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
TYPES OF MICROPROCESSOR LOCOS
There are two types of microprocessor locomotives in south central railway
1 MEDHA MICROPROCESSOR
2 GE MICROPROCESSOR
TYPES OF MICROPROCESSOR LOCOS
There are two types of microprocessor locomotives in south central railway
1 MEDHA MICROPROCESSOR
2 GE MICROPROCESSOR
MEDHA MICROPROCESSOR
List of Items Removed
1 Rotating machinesAxle Driven Alternator Tacho generator
List of Items Removed
2Control PanelsExcitation Control Panel (EXCP)Engine Control Panel (ECP)Voltage Regulator Panel (VRP)Transition Regulator Panel (TRP)
3Resistor Panels
Wheel slip resistor panel (WSRR1 amp 2)Wheel slip control resistors WR8 WR9 amp WR10Oscillator Voltage Dividing panel (OVDR)Generator Voltage Dividing panel (GVDRVDP)Tacho generator load resistor panel (TGLR)Braking limiting resistor panel (BKER1 amp 2)
4Relays Out of 23 relays 13 relays are eliminated amp 10 relays retained
s no Retained relays
1DMR DMR
2 ERR Renamed as SANDER
3 BSR Renamed as ALRTRB
4 CVR Renamed as CMR
5 TR Renamed as SLBRFSR
6 SR SR
7 BKR1
8 BKR2
9 BKR3
10 ALR1 AFLR
11 ALR2
12 ALR3
13 Timer Relay
14 WSR1
15 WSR2
16 WSR3
17 GR1
18 GR2
19 GFOLR
20 CKR1 Renamed as AGPR
21 CKR2 Renamed as EXPR
22 TDR
23 MVR MVR
5 MISCELLANEOUS ITEMS REMOVED
Transition Excitation Transformer (TET)
Armature Current control reactor (ACCR)
Stabilizing panel (Stab Panel)
Voltage regulator current limiting shunt (VRCLS)
Load ammeter shunt (LAS)
Engine Temperature Switches ndash TS1 TS2 TS3 and ETS
BREAKERS
DISPLAY UNIT
Startstop PB
INDICATION PANEL
Throttle
Load meter
ECS
ALERTER LAMP
DRIVERrsquoS CABIN
99
RBB LPB1 LPB2 DLCB HLPBDEB (Eng)
DEB (Car)
Keep Always ON
CEBRFCB PLPB FPB MPCB AGFB
MB2 MB1
Additional Breakers
NEWLY PROVIDED ITEMSCircuit BreakersThe nomenclatures of all the breakers and switches are almost all same as conventional WDG3A locomotive
Existing Breakers Lighting Circuit
Breakers LPB1 LPB2 HLPB DLCB
MB1 ndash Main Breaker 1MB2 ndash Main Breaker 2AGFB - Auxiliary Generator Field BreakerMFPB1amp2 - Master Fuel Pump BreakersMCB1amp2 - Master Control BreakersFPB ndash Fuel Pump BreakerCEB ndash Crankcase Exhauster BreakerDEB (Eng)- Dust Exhauster Breaker (Eng Side)DEB (Carb) - Dust Exhauster Breaker (Carb Side)RBB - Rectifier Blower BreakerRFCB - Radiator Fan Clutch Breaker (ERF)
MPCBMPCB - - Microprocessor circuit Microprocessor circuit breakerbreaker
PLPBPLPB - - Pre lubrication Pump Pre lubrication Pump BreakerBreaker
DO not switch OFF MPCBDO not switch OFF MPCBSwitch OFF MCB1 amp MCB2 Switch OFF MCB1 amp MCB2
while crankingwhile cranking
Extra (New) BreakersExtra (New) Breakers
EXTRA (NEW )SWITCHESEXTRA (NEW )SWITCHES
lsquolsquoTE LIMITrsquo switch provided TE LIMITrsquo switch provided on the CB panel near the on the CB panel near the compartment light compartment light switchesswitches For normal working keep this For normal working keep this
switch in lsquoswitch in lsquoNORMALrsquo NORMALrsquo position position To limit Tractive effort keep To limit Tractive effort keep
this switch in this switch in lsquoLIMITrsquo lsquoLIMITrsquo position position
WITH TE LIMIT SWITCH IN lsquoLIMITrsquo POSITION WHEN NOT REQUIRED
MAY RESULT IN STALLING OF TRAIN
1 Tractive Effort Limit Switch
1313
2 MOTOR CUTOUT 2 MOTOR CUTOUT SWITCHES SWITCHES
Conventional Rotary type Conventional Rotary type motor cut out switch is motor cut out switch is replaced with 6 individual replaced with 6 individual toggle switches toggle switches
MCOS1 MCOS2 MCOS3 MCOS1 MCOS2 MCOS3 MCOS4 MCOS5 amp MCOS6 MCOS4 MCOS5 amp MCOS6 These switches are located These switches are located
inside the control panel inside the control panel behind the left side door behind the left side door
Normally all these switches Normally all these switches are in are in ON ON (down) position (down) position
Loco Pilot can switch OFF Loco Pilot can switch OFF the required MCOS switches the required MCOS switches up to 5 at a time up to 5 at a time
SENSOR S amp LOCATION
Current sensors(14) --- provided at front panelVoltage sensors (5) --- provided at back panelTemperature sensors(3) --- Two provided in Expresser room and
one is provided in back panelPressure sensors(5) --- provided at nose compartmentSpeed sensors(7) --- six connected to each TM and one connected (ESS) to left cam gear cover
ENGINE SPEED SENSOR (ESS)
VCD Isolation switch
RELAYSGR1amp2 Cut out switch
ADBS4 Nos
CONTROL UNIT
MICRO PROCESSOR FRONT PANNEL
MICRO PROCESSOR CONTROL UNIT
bullThis is the main control equipment in the Microprocessor control system
bullThis is located at the Front panel in the place of ECP
bullThe total control system is functionally divided into different modules
bullThese modules are dustproof amp plug in type cards for easy replacement
bullThe connectors of these modules are unique They can not be inserted at wrong place
bullIt is having 19 cards
MEDHA MICRO PROCESSOR DISPLAY UNIT
It is provided at left side of ECS switch on the control panel Display unit is the main interface between the user and the equipment It displays group wise parameters of the locomotive as selected by driver user It displays fault messages Digital inputs and outputs can be tested through the unit
Main MenuMain Menu
2) Display Mode
4) Exit
1) Faults
3) Test Mode
Faults - Submenu
1 View Faults2 Clear Faults
2121
View Faults - SubmenuView Faults - SubmenuThe registered Faults at run time will be displayed The registered Faults at run time will be displayed
User can navigate through the faults using down User can navigate through the faults using down arrow till the following message is displayedarrow till the following message is displayed
lsquoNo More Faults Press Menu Key to exitrsquo
MENU
Clear Faults - SubmenuClear Faults - Submenu
The registered Faults at run time will be displayed User can navigate through the faults using down arrow key and clear the faults by pressing lsquo0rsquo key Till the following message is displayed
Use lsquo0rsquo key to Clear
Depending upon the level of the fault the display prompts pass code for some faults to clear them After entering the valid pass code the fault can be cleared
No More Faults Press Menu Key to exit
MENU
Display Mode SubmenuDisplay Mode Submenu
1 Excitation
2 Auxiliary
3 Wheel Slip
4 Mixed
MENU
5 Driver Display6 MCBG status
7 Collective Data8 Digital inputs
MENU
Display Mode SubmenuDisplay Mode Submenu
9 Digital Outputs10 HP status
MENU
Test ModeTest Mode
NOT APPLICABLE TO LOCO PILOTS
DRIVER DISPLAY
The Driver default display has got three screens
1 IDLE Screen2 Motoring Screen3 Braking Screen
Respective screens are changed automatically based on the control stand signals while the locomotive operation is being set by the Driver
In each screen relative parameters are displayed as shown below
ADB(Analog distribution box)
There are 4 Analog Distribution BoxesThese are located at Front panel in the place of VRPTRP
Each ADB Unit generates isolated low voltage source required for the sensors connected to it from the locomotive control voltage of 72V
Each ADB can handle 8 analog inputs from various sensors and transmit them to the Control unit
RDB(RPM Distribution box)
bullRPM Distribution Unit is similar to the Analog Distribution Unit but handles RPM signals
bullThis is located at Front panel in the place of VRPTRP
bullAll the six traction motor RPM sensors are connected to this RDB
ADDITIONAL FEATURES WITH MEP-6601 Limitation of Power to 4th notch with Failure of Dust Exhauster BreakersFailure of dust exhauster motors clog the filters and Quantity of inlet air is reduced Hence the power is limited to 4th notch along with a warning message if the notch above 4th notch
2 Limitation of Power to 4th notch with Failure of RBB or Diode HOTFailure of RBB result in no cooling to power rectifier Similarly if amount of cooling to Rectifier diodes is less due to ay reasons the diodes become HOT In order to safeguard the power rectifier the engine power is restricted to 4th notch
3 Cold Engine based loadingSoon after cranking the engine speed is restricted based on the lube oil temperature till the lube oil temperature is raised up to 60 degcent To improve lubrication
4 Power De-ration from T3 setting to T4 setting (90 to 95 degCent)The engine power is de-rated by 20 of the notch power for every degree raise from 90 deg Onwards
5 8th notch RPM at hottest TemperatureWhen the Engine temperature reached to T4 setting (95 Deg Cen) Engine RPM is raised to 8th notch automatically by cutting of power for faster cooling of engine
6LOW IDLE FEATURE
When the locomotive is in IDLE for more than 10 minutes the engine RPM is reduced to 350 by energising AV and DV for reducing the fuel oil consumption This is posssible only with governors having this option
7Built in Auto switching ON Flasher lights with Simplified circuit
8Self Load box Testing
9Ambient temperature based battery charging
10Event recorder
11Prelubrication
12MULTI RESET VIGILANCE CONTROL DEVICE One VCD reset push button is provided on the control desk near Master handle
MULTI RESET VIGILANCE CONTROL DEVICE
WHY VCD
To stop the train If driver is INCAPACITATED An intelligent vigilance control device with multi-reset feature has
been provided to stop the train if the driver is incapacitated
1048714 The device alerts the driver for every 60 seconds before stopping train If the driver is not alert incapacitated VCD applies there by Engine will come to Idle and penalty brakes will be applied and the train stops
1048714 One VCD alerting lamp provided on each control desk near LED indication panel
1048714 One VCD reset push button is provided on the control desk near master handle
VCD disable unit is provided in the Control PanelPenalty brake application Valve is provided in nose compartment
VCD STARTS FUNCTION
Soon after circuit breakers MB1 MB2 MPCB MFPB1 MFPB2 MCB1 ampMCB2 are switched ON and BCP is less than 21 Kg Sqcm
VCD DOES NOT FUNCTION
If BCP is more than 21 KgSqcm and Loco speed is zero
What VCD do before Penalty BrakesVCD alerts the driver once in every 60 seconds through a Blinking LEDif none of the following activities are performed with in 60 sec1048714 Increase Decrease notch1048708 Application Release of A91048708 Application release of DB1048708 Change of DB level1048708 Operation of GF switches1048708 Change of RH position1048708 Operation of Horn buttons1048708 Operation of Sander buttons1048708 Pressing of VCD reset button
What Driver has to doPerform any of the following loco operations as required or Press VCDRESET button to suppress warning lamp
What if Driver does not respond to VCD warnings
1048708 The Blinking LED continues for 17 seconds1048708 After 17 seconds a buzzer is switched ON along with Blinking LED1048708 A message lsquo 2019 - VCD time out Press VCD reset switchrsquo is displayed on the screen1048708 The blinking LED and buzzer continues for another 17 seconds
What if Driver does not respond up to 94 seconds
The MEP-660 assumes that the driver is dead incapacitated and appliesPenalty Brakes after 94 (60+17+17) seconds and the following changes takesplace in the locomotive1 A message lsquo2301 - VCD Applied Penalty Brakesrsquo will be displayed on the Display Panel2 VCD counter is increased by 13 Buzzer is switched OFF4 LED continue to blink for another 35sec5 BP is reduced to 28 KgSqcm6 Loco Formation brakes are applied7 Engine speed is brought to IDLE8 GF power contactor is dropped out9 Power contactors are dropped out after Master handle brought to IDLE
FOR RELEASING THE PENALTY BRAKES
1 Bring the Throttle to IDLE2 Wait till the blinking LED is OFF3 Wait till the Loco speed is reduced to zero4 Press VCD RESET button
WHILE WAITING FOR SIGNAL IN THE YARD
Apply loco brakes with SA9 to suppress VCD function Ensure BCP is morethan 21 kgSqcm
NOTEbull Always press lsquoVCD resetrsquo switch whenever lsquoVCD LEDrsquo is blinkingbull Donrsquot forget to apply loco brakes while loco is in stand
THE microP LOCOMOTIVE IS WORKING AS REAR LOCOMOTIVE IN MU OPERATION
1 While the locomotive is working as rear loco in MU operation the VCD is not required2 The circuit breakers MCB1 and MCB2 which are available on control desks of Rear Loco should be switched off after making MU set up3 The VCD function is automatically isolated in rear loco and the display shows lsquoVCD in MUrsquo message in the 4th line indicating the status of the VCD4 otherwise ndash What happens 5 Rear loco does not respond to lead loco signalsVCD counterAn incrementing counter by name lsquoVCD Counterrsquo is added in the displayscreen This parameter is visible only when the loco is in idle position Thecount is incremented by one as and when the VCD applies penalty brakeindicating that the driver is not alert
NOTE Please note the reading of this lsquoVCD Counterrsquo on the display unit andrecord the same in the driverrsquos logbook while taking over charge of thelocomotive
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
List of Items Removed
2Control PanelsExcitation Control Panel (EXCP)Engine Control Panel (ECP)Voltage Regulator Panel (VRP)Transition Regulator Panel (TRP)
3Resistor Panels
Wheel slip resistor panel (WSRR1 amp 2)Wheel slip control resistors WR8 WR9 amp WR10Oscillator Voltage Dividing panel (OVDR)Generator Voltage Dividing panel (GVDRVDP)Tacho generator load resistor panel (TGLR)Braking limiting resistor panel (BKER1 amp 2)
4Relays Out of 23 relays 13 relays are eliminated amp 10 relays retained
s no Retained relays
1DMR DMR
2 ERR Renamed as SANDER
3 BSR Renamed as ALRTRB
4 CVR Renamed as CMR
5 TR Renamed as SLBRFSR
6 SR SR
7 BKR1
8 BKR2
9 BKR3
10 ALR1 AFLR
11 ALR2
12 ALR3
13 Timer Relay
14 WSR1
15 WSR2
16 WSR3
17 GR1
18 GR2
19 GFOLR
20 CKR1 Renamed as AGPR
21 CKR2 Renamed as EXPR
22 TDR
23 MVR MVR
5 MISCELLANEOUS ITEMS REMOVED
Transition Excitation Transformer (TET)
Armature Current control reactor (ACCR)
Stabilizing panel (Stab Panel)
Voltage regulator current limiting shunt (VRCLS)
Load ammeter shunt (LAS)
Engine Temperature Switches ndash TS1 TS2 TS3 and ETS
BREAKERS
DISPLAY UNIT
Startstop PB
INDICATION PANEL
Throttle
Load meter
ECS
ALERTER LAMP
DRIVERrsquoS CABIN
99
RBB LPB1 LPB2 DLCB HLPBDEB (Eng)
DEB (Car)
Keep Always ON
CEBRFCB PLPB FPB MPCB AGFB
MB2 MB1
Additional Breakers
NEWLY PROVIDED ITEMSCircuit BreakersThe nomenclatures of all the breakers and switches are almost all same as conventional WDG3A locomotive
Existing Breakers Lighting Circuit
Breakers LPB1 LPB2 HLPB DLCB
MB1 ndash Main Breaker 1MB2 ndash Main Breaker 2AGFB - Auxiliary Generator Field BreakerMFPB1amp2 - Master Fuel Pump BreakersMCB1amp2 - Master Control BreakersFPB ndash Fuel Pump BreakerCEB ndash Crankcase Exhauster BreakerDEB (Eng)- Dust Exhauster Breaker (Eng Side)DEB (Carb) - Dust Exhauster Breaker (Carb Side)RBB - Rectifier Blower BreakerRFCB - Radiator Fan Clutch Breaker (ERF)
MPCBMPCB - - Microprocessor circuit Microprocessor circuit breakerbreaker
PLPBPLPB - - Pre lubrication Pump Pre lubrication Pump BreakerBreaker
DO not switch OFF MPCBDO not switch OFF MPCBSwitch OFF MCB1 amp MCB2 Switch OFF MCB1 amp MCB2
while crankingwhile cranking
Extra (New) BreakersExtra (New) Breakers
EXTRA (NEW )SWITCHESEXTRA (NEW )SWITCHES
lsquolsquoTE LIMITrsquo switch provided TE LIMITrsquo switch provided on the CB panel near the on the CB panel near the compartment light compartment light switchesswitches For normal working keep this For normal working keep this
switch in lsquoswitch in lsquoNORMALrsquo NORMALrsquo position position To limit Tractive effort keep To limit Tractive effort keep
this switch in this switch in lsquoLIMITrsquo lsquoLIMITrsquo position position
WITH TE LIMIT SWITCH IN lsquoLIMITrsquo POSITION WHEN NOT REQUIRED
MAY RESULT IN STALLING OF TRAIN
1 Tractive Effort Limit Switch
1313
2 MOTOR CUTOUT 2 MOTOR CUTOUT SWITCHES SWITCHES
Conventional Rotary type Conventional Rotary type motor cut out switch is motor cut out switch is replaced with 6 individual replaced with 6 individual toggle switches toggle switches
MCOS1 MCOS2 MCOS3 MCOS1 MCOS2 MCOS3 MCOS4 MCOS5 amp MCOS6 MCOS4 MCOS5 amp MCOS6 These switches are located These switches are located
inside the control panel inside the control panel behind the left side door behind the left side door
Normally all these switches Normally all these switches are in are in ON ON (down) position (down) position
Loco Pilot can switch OFF Loco Pilot can switch OFF the required MCOS switches the required MCOS switches up to 5 at a time up to 5 at a time
SENSOR S amp LOCATION
Current sensors(14) --- provided at front panelVoltage sensors (5) --- provided at back panelTemperature sensors(3) --- Two provided in Expresser room and
one is provided in back panelPressure sensors(5) --- provided at nose compartmentSpeed sensors(7) --- six connected to each TM and one connected (ESS) to left cam gear cover
ENGINE SPEED SENSOR (ESS)
VCD Isolation switch
RELAYSGR1amp2 Cut out switch
ADBS4 Nos
CONTROL UNIT
MICRO PROCESSOR FRONT PANNEL
MICRO PROCESSOR CONTROL UNIT
bullThis is the main control equipment in the Microprocessor control system
bullThis is located at the Front panel in the place of ECP
bullThe total control system is functionally divided into different modules
bullThese modules are dustproof amp plug in type cards for easy replacement
bullThe connectors of these modules are unique They can not be inserted at wrong place
bullIt is having 19 cards
MEDHA MICRO PROCESSOR DISPLAY UNIT
It is provided at left side of ECS switch on the control panel Display unit is the main interface between the user and the equipment It displays group wise parameters of the locomotive as selected by driver user It displays fault messages Digital inputs and outputs can be tested through the unit
Main MenuMain Menu
2) Display Mode
4) Exit
1) Faults
3) Test Mode
Faults - Submenu
1 View Faults2 Clear Faults
2121
View Faults - SubmenuView Faults - SubmenuThe registered Faults at run time will be displayed The registered Faults at run time will be displayed
User can navigate through the faults using down User can navigate through the faults using down arrow till the following message is displayedarrow till the following message is displayed
lsquoNo More Faults Press Menu Key to exitrsquo
MENU
Clear Faults - SubmenuClear Faults - Submenu
The registered Faults at run time will be displayed User can navigate through the faults using down arrow key and clear the faults by pressing lsquo0rsquo key Till the following message is displayed
Use lsquo0rsquo key to Clear
Depending upon the level of the fault the display prompts pass code for some faults to clear them After entering the valid pass code the fault can be cleared
No More Faults Press Menu Key to exit
MENU
Display Mode SubmenuDisplay Mode Submenu
1 Excitation
2 Auxiliary
3 Wheel Slip
4 Mixed
MENU
5 Driver Display6 MCBG status
7 Collective Data8 Digital inputs
MENU
Display Mode SubmenuDisplay Mode Submenu
9 Digital Outputs10 HP status
MENU
Test ModeTest Mode
NOT APPLICABLE TO LOCO PILOTS
DRIVER DISPLAY
The Driver default display has got three screens
1 IDLE Screen2 Motoring Screen3 Braking Screen
Respective screens are changed automatically based on the control stand signals while the locomotive operation is being set by the Driver
In each screen relative parameters are displayed as shown below
ADB(Analog distribution box)
There are 4 Analog Distribution BoxesThese are located at Front panel in the place of VRPTRP
Each ADB Unit generates isolated low voltage source required for the sensors connected to it from the locomotive control voltage of 72V
Each ADB can handle 8 analog inputs from various sensors and transmit them to the Control unit
RDB(RPM Distribution box)
bullRPM Distribution Unit is similar to the Analog Distribution Unit but handles RPM signals
bullThis is located at Front panel in the place of VRPTRP
bullAll the six traction motor RPM sensors are connected to this RDB
ADDITIONAL FEATURES WITH MEP-6601 Limitation of Power to 4th notch with Failure of Dust Exhauster BreakersFailure of dust exhauster motors clog the filters and Quantity of inlet air is reduced Hence the power is limited to 4th notch along with a warning message if the notch above 4th notch
2 Limitation of Power to 4th notch with Failure of RBB or Diode HOTFailure of RBB result in no cooling to power rectifier Similarly if amount of cooling to Rectifier diodes is less due to ay reasons the diodes become HOT In order to safeguard the power rectifier the engine power is restricted to 4th notch
3 Cold Engine based loadingSoon after cranking the engine speed is restricted based on the lube oil temperature till the lube oil temperature is raised up to 60 degcent To improve lubrication
4 Power De-ration from T3 setting to T4 setting (90 to 95 degCent)The engine power is de-rated by 20 of the notch power for every degree raise from 90 deg Onwards
5 8th notch RPM at hottest TemperatureWhen the Engine temperature reached to T4 setting (95 Deg Cen) Engine RPM is raised to 8th notch automatically by cutting of power for faster cooling of engine
6LOW IDLE FEATURE
When the locomotive is in IDLE for more than 10 minutes the engine RPM is reduced to 350 by energising AV and DV for reducing the fuel oil consumption This is posssible only with governors having this option
7Built in Auto switching ON Flasher lights with Simplified circuit
8Self Load box Testing
9Ambient temperature based battery charging
10Event recorder
11Prelubrication
12MULTI RESET VIGILANCE CONTROL DEVICE One VCD reset push button is provided on the control desk near Master handle
MULTI RESET VIGILANCE CONTROL DEVICE
WHY VCD
To stop the train If driver is INCAPACITATED An intelligent vigilance control device with multi-reset feature has
been provided to stop the train if the driver is incapacitated
1048714 The device alerts the driver for every 60 seconds before stopping train If the driver is not alert incapacitated VCD applies there by Engine will come to Idle and penalty brakes will be applied and the train stops
1048714 One VCD alerting lamp provided on each control desk near LED indication panel
1048714 One VCD reset push button is provided on the control desk near master handle
VCD disable unit is provided in the Control PanelPenalty brake application Valve is provided in nose compartment
VCD STARTS FUNCTION
Soon after circuit breakers MB1 MB2 MPCB MFPB1 MFPB2 MCB1 ampMCB2 are switched ON and BCP is less than 21 Kg Sqcm
VCD DOES NOT FUNCTION
If BCP is more than 21 KgSqcm and Loco speed is zero
What VCD do before Penalty BrakesVCD alerts the driver once in every 60 seconds through a Blinking LEDif none of the following activities are performed with in 60 sec1048714 Increase Decrease notch1048708 Application Release of A91048708 Application release of DB1048708 Change of DB level1048708 Operation of GF switches1048708 Change of RH position1048708 Operation of Horn buttons1048708 Operation of Sander buttons1048708 Pressing of VCD reset button
What Driver has to doPerform any of the following loco operations as required or Press VCDRESET button to suppress warning lamp
What if Driver does not respond to VCD warnings
1048708 The Blinking LED continues for 17 seconds1048708 After 17 seconds a buzzer is switched ON along with Blinking LED1048708 A message lsquo 2019 - VCD time out Press VCD reset switchrsquo is displayed on the screen1048708 The blinking LED and buzzer continues for another 17 seconds
What if Driver does not respond up to 94 seconds
The MEP-660 assumes that the driver is dead incapacitated and appliesPenalty Brakes after 94 (60+17+17) seconds and the following changes takesplace in the locomotive1 A message lsquo2301 - VCD Applied Penalty Brakesrsquo will be displayed on the Display Panel2 VCD counter is increased by 13 Buzzer is switched OFF4 LED continue to blink for another 35sec5 BP is reduced to 28 KgSqcm6 Loco Formation brakes are applied7 Engine speed is brought to IDLE8 GF power contactor is dropped out9 Power contactors are dropped out after Master handle brought to IDLE
FOR RELEASING THE PENALTY BRAKES
1 Bring the Throttle to IDLE2 Wait till the blinking LED is OFF3 Wait till the Loco speed is reduced to zero4 Press VCD RESET button
WHILE WAITING FOR SIGNAL IN THE YARD
Apply loco brakes with SA9 to suppress VCD function Ensure BCP is morethan 21 kgSqcm
NOTEbull Always press lsquoVCD resetrsquo switch whenever lsquoVCD LEDrsquo is blinkingbull Donrsquot forget to apply loco brakes while loco is in stand
THE microP LOCOMOTIVE IS WORKING AS REAR LOCOMOTIVE IN MU OPERATION
1 While the locomotive is working as rear loco in MU operation the VCD is not required2 The circuit breakers MCB1 and MCB2 which are available on control desks of Rear Loco should be switched off after making MU set up3 The VCD function is automatically isolated in rear loco and the display shows lsquoVCD in MUrsquo message in the 4th line indicating the status of the VCD4 otherwise ndash What happens 5 Rear loco does not respond to lead loco signalsVCD counterAn incrementing counter by name lsquoVCD Counterrsquo is added in the displayscreen This parameter is visible only when the loco is in idle position Thecount is incremented by one as and when the VCD applies penalty brakeindicating that the driver is not alert
NOTE Please note the reading of this lsquoVCD Counterrsquo on the display unit andrecord the same in the driverrsquos logbook while taking over charge of thelocomotive
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
4Relays Out of 23 relays 13 relays are eliminated amp 10 relays retained
s no Retained relays
1DMR DMR
2 ERR Renamed as SANDER
3 BSR Renamed as ALRTRB
4 CVR Renamed as CMR
5 TR Renamed as SLBRFSR
6 SR SR
7 BKR1
8 BKR2
9 BKR3
10 ALR1 AFLR
11 ALR2
12 ALR3
13 Timer Relay
14 WSR1
15 WSR2
16 WSR3
17 GR1
18 GR2
19 GFOLR
20 CKR1 Renamed as AGPR
21 CKR2 Renamed as EXPR
22 TDR
23 MVR MVR
5 MISCELLANEOUS ITEMS REMOVED
Transition Excitation Transformer (TET)
Armature Current control reactor (ACCR)
Stabilizing panel (Stab Panel)
Voltage regulator current limiting shunt (VRCLS)
Load ammeter shunt (LAS)
Engine Temperature Switches ndash TS1 TS2 TS3 and ETS
BREAKERS
DISPLAY UNIT
Startstop PB
INDICATION PANEL
Throttle
Load meter
ECS
ALERTER LAMP
DRIVERrsquoS CABIN
99
RBB LPB1 LPB2 DLCB HLPBDEB (Eng)
DEB (Car)
Keep Always ON
CEBRFCB PLPB FPB MPCB AGFB
MB2 MB1
Additional Breakers
NEWLY PROVIDED ITEMSCircuit BreakersThe nomenclatures of all the breakers and switches are almost all same as conventional WDG3A locomotive
Existing Breakers Lighting Circuit
Breakers LPB1 LPB2 HLPB DLCB
MB1 ndash Main Breaker 1MB2 ndash Main Breaker 2AGFB - Auxiliary Generator Field BreakerMFPB1amp2 - Master Fuel Pump BreakersMCB1amp2 - Master Control BreakersFPB ndash Fuel Pump BreakerCEB ndash Crankcase Exhauster BreakerDEB (Eng)- Dust Exhauster Breaker (Eng Side)DEB (Carb) - Dust Exhauster Breaker (Carb Side)RBB - Rectifier Blower BreakerRFCB - Radiator Fan Clutch Breaker (ERF)
MPCBMPCB - - Microprocessor circuit Microprocessor circuit breakerbreaker
PLPBPLPB - - Pre lubrication Pump Pre lubrication Pump BreakerBreaker
DO not switch OFF MPCBDO not switch OFF MPCBSwitch OFF MCB1 amp MCB2 Switch OFF MCB1 amp MCB2
while crankingwhile cranking
Extra (New) BreakersExtra (New) Breakers
EXTRA (NEW )SWITCHESEXTRA (NEW )SWITCHES
lsquolsquoTE LIMITrsquo switch provided TE LIMITrsquo switch provided on the CB panel near the on the CB panel near the compartment light compartment light switchesswitches For normal working keep this For normal working keep this
switch in lsquoswitch in lsquoNORMALrsquo NORMALrsquo position position To limit Tractive effort keep To limit Tractive effort keep
this switch in this switch in lsquoLIMITrsquo lsquoLIMITrsquo position position
WITH TE LIMIT SWITCH IN lsquoLIMITrsquo POSITION WHEN NOT REQUIRED
MAY RESULT IN STALLING OF TRAIN
1 Tractive Effort Limit Switch
1313
2 MOTOR CUTOUT 2 MOTOR CUTOUT SWITCHES SWITCHES
Conventional Rotary type Conventional Rotary type motor cut out switch is motor cut out switch is replaced with 6 individual replaced with 6 individual toggle switches toggle switches
MCOS1 MCOS2 MCOS3 MCOS1 MCOS2 MCOS3 MCOS4 MCOS5 amp MCOS6 MCOS4 MCOS5 amp MCOS6 These switches are located These switches are located
inside the control panel inside the control panel behind the left side door behind the left side door
Normally all these switches Normally all these switches are in are in ON ON (down) position (down) position
Loco Pilot can switch OFF Loco Pilot can switch OFF the required MCOS switches the required MCOS switches up to 5 at a time up to 5 at a time
SENSOR S amp LOCATION
Current sensors(14) --- provided at front panelVoltage sensors (5) --- provided at back panelTemperature sensors(3) --- Two provided in Expresser room and
one is provided in back panelPressure sensors(5) --- provided at nose compartmentSpeed sensors(7) --- six connected to each TM and one connected (ESS) to left cam gear cover
ENGINE SPEED SENSOR (ESS)
VCD Isolation switch
RELAYSGR1amp2 Cut out switch
ADBS4 Nos
CONTROL UNIT
MICRO PROCESSOR FRONT PANNEL
MICRO PROCESSOR CONTROL UNIT
bullThis is the main control equipment in the Microprocessor control system
bullThis is located at the Front panel in the place of ECP
bullThe total control system is functionally divided into different modules
bullThese modules are dustproof amp plug in type cards for easy replacement
bullThe connectors of these modules are unique They can not be inserted at wrong place
bullIt is having 19 cards
MEDHA MICRO PROCESSOR DISPLAY UNIT
It is provided at left side of ECS switch on the control panel Display unit is the main interface between the user and the equipment It displays group wise parameters of the locomotive as selected by driver user It displays fault messages Digital inputs and outputs can be tested through the unit
Main MenuMain Menu
2) Display Mode
4) Exit
1) Faults
3) Test Mode
Faults - Submenu
1 View Faults2 Clear Faults
2121
View Faults - SubmenuView Faults - SubmenuThe registered Faults at run time will be displayed The registered Faults at run time will be displayed
User can navigate through the faults using down User can navigate through the faults using down arrow till the following message is displayedarrow till the following message is displayed
lsquoNo More Faults Press Menu Key to exitrsquo
MENU
Clear Faults - SubmenuClear Faults - Submenu
The registered Faults at run time will be displayed User can navigate through the faults using down arrow key and clear the faults by pressing lsquo0rsquo key Till the following message is displayed
Use lsquo0rsquo key to Clear
Depending upon the level of the fault the display prompts pass code for some faults to clear them After entering the valid pass code the fault can be cleared
No More Faults Press Menu Key to exit
MENU
Display Mode SubmenuDisplay Mode Submenu
1 Excitation
2 Auxiliary
3 Wheel Slip
4 Mixed
MENU
5 Driver Display6 MCBG status
7 Collective Data8 Digital inputs
MENU
Display Mode SubmenuDisplay Mode Submenu
9 Digital Outputs10 HP status
MENU
Test ModeTest Mode
NOT APPLICABLE TO LOCO PILOTS
DRIVER DISPLAY
The Driver default display has got three screens
1 IDLE Screen2 Motoring Screen3 Braking Screen
Respective screens are changed automatically based on the control stand signals while the locomotive operation is being set by the Driver
In each screen relative parameters are displayed as shown below
ADB(Analog distribution box)
There are 4 Analog Distribution BoxesThese are located at Front panel in the place of VRPTRP
Each ADB Unit generates isolated low voltage source required for the sensors connected to it from the locomotive control voltage of 72V
Each ADB can handle 8 analog inputs from various sensors and transmit them to the Control unit
RDB(RPM Distribution box)
bullRPM Distribution Unit is similar to the Analog Distribution Unit but handles RPM signals
bullThis is located at Front panel in the place of VRPTRP
bullAll the six traction motor RPM sensors are connected to this RDB
ADDITIONAL FEATURES WITH MEP-6601 Limitation of Power to 4th notch with Failure of Dust Exhauster BreakersFailure of dust exhauster motors clog the filters and Quantity of inlet air is reduced Hence the power is limited to 4th notch along with a warning message if the notch above 4th notch
2 Limitation of Power to 4th notch with Failure of RBB or Diode HOTFailure of RBB result in no cooling to power rectifier Similarly if amount of cooling to Rectifier diodes is less due to ay reasons the diodes become HOT In order to safeguard the power rectifier the engine power is restricted to 4th notch
3 Cold Engine based loadingSoon after cranking the engine speed is restricted based on the lube oil temperature till the lube oil temperature is raised up to 60 degcent To improve lubrication
4 Power De-ration from T3 setting to T4 setting (90 to 95 degCent)The engine power is de-rated by 20 of the notch power for every degree raise from 90 deg Onwards
5 8th notch RPM at hottest TemperatureWhen the Engine temperature reached to T4 setting (95 Deg Cen) Engine RPM is raised to 8th notch automatically by cutting of power for faster cooling of engine
6LOW IDLE FEATURE
When the locomotive is in IDLE for more than 10 minutes the engine RPM is reduced to 350 by energising AV and DV for reducing the fuel oil consumption This is posssible only with governors having this option
7Built in Auto switching ON Flasher lights with Simplified circuit
8Self Load box Testing
9Ambient temperature based battery charging
10Event recorder
11Prelubrication
12MULTI RESET VIGILANCE CONTROL DEVICE One VCD reset push button is provided on the control desk near Master handle
MULTI RESET VIGILANCE CONTROL DEVICE
WHY VCD
To stop the train If driver is INCAPACITATED An intelligent vigilance control device with multi-reset feature has
been provided to stop the train if the driver is incapacitated
1048714 The device alerts the driver for every 60 seconds before stopping train If the driver is not alert incapacitated VCD applies there by Engine will come to Idle and penalty brakes will be applied and the train stops
1048714 One VCD alerting lamp provided on each control desk near LED indication panel
1048714 One VCD reset push button is provided on the control desk near master handle
VCD disable unit is provided in the Control PanelPenalty brake application Valve is provided in nose compartment
VCD STARTS FUNCTION
Soon after circuit breakers MB1 MB2 MPCB MFPB1 MFPB2 MCB1 ampMCB2 are switched ON and BCP is less than 21 Kg Sqcm
VCD DOES NOT FUNCTION
If BCP is more than 21 KgSqcm and Loco speed is zero
What VCD do before Penalty BrakesVCD alerts the driver once in every 60 seconds through a Blinking LEDif none of the following activities are performed with in 60 sec1048714 Increase Decrease notch1048708 Application Release of A91048708 Application release of DB1048708 Change of DB level1048708 Operation of GF switches1048708 Change of RH position1048708 Operation of Horn buttons1048708 Operation of Sander buttons1048708 Pressing of VCD reset button
What Driver has to doPerform any of the following loco operations as required or Press VCDRESET button to suppress warning lamp
What if Driver does not respond to VCD warnings
1048708 The Blinking LED continues for 17 seconds1048708 After 17 seconds a buzzer is switched ON along with Blinking LED1048708 A message lsquo 2019 - VCD time out Press VCD reset switchrsquo is displayed on the screen1048708 The blinking LED and buzzer continues for another 17 seconds
What if Driver does not respond up to 94 seconds
The MEP-660 assumes that the driver is dead incapacitated and appliesPenalty Brakes after 94 (60+17+17) seconds and the following changes takesplace in the locomotive1 A message lsquo2301 - VCD Applied Penalty Brakesrsquo will be displayed on the Display Panel2 VCD counter is increased by 13 Buzzer is switched OFF4 LED continue to blink for another 35sec5 BP is reduced to 28 KgSqcm6 Loco Formation brakes are applied7 Engine speed is brought to IDLE8 GF power contactor is dropped out9 Power contactors are dropped out after Master handle brought to IDLE
FOR RELEASING THE PENALTY BRAKES
1 Bring the Throttle to IDLE2 Wait till the blinking LED is OFF3 Wait till the Loco speed is reduced to zero4 Press VCD RESET button
WHILE WAITING FOR SIGNAL IN THE YARD
Apply loco brakes with SA9 to suppress VCD function Ensure BCP is morethan 21 kgSqcm
NOTEbull Always press lsquoVCD resetrsquo switch whenever lsquoVCD LEDrsquo is blinkingbull Donrsquot forget to apply loco brakes while loco is in stand
THE microP LOCOMOTIVE IS WORKING AS REAR LOCOMOTIVE IN MU OPERATION
1 While the locomotive is working as rear loco in MU operation the VCD is not required2 The circuit breakers MCB1 and MCB2 which are available on control desks of Rear Loco should be switched off after making MU set up3 The VCD function is automatically isolated in rear loco and the display shows lsquoVCD in MUrsquo message in the 4th line indicating the status of the VCD4 otherwise ndash What happens 5 Rear loco does not respond to lead loco signalsVCD counterAn incrementing counter by name lsquoVCD Counterrsquo is added in the displayscreen This parameter is visible only when the loco is in idle position Thecount is incremented by one as and when the VCD applies penalty brakeindicating that the driver is not alert
NOTE Please note the reading of this lsquoVCD Counterrsquo on the display unit andrecord the same in the driverrsquos logbook while taking over charge of thelocomotive
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
10 ALR1 AFLR
11 ALR2
12 ALR3
13 Timer Relay
14 WSR1
15 WSR2
16 WSR3
17 GR1
18 GR2
19 GFOLR
20 CKR1 Renamed as AGPR
21 CKR2 Renamed as EXPR
22 TDR
23 MVR MVR
5 MISCELLANEOUS ITEMS REMOVED
Transition Excitation Transformer (TET)
Armature Current control reactor (ACCR)
Stabilizing panel (Stab Panel)
Voltage regulator current limiting shunt (VRCLS)
Load ammeter shunt (LAS)
Engine Temperature Switches ndash TS1 TS2 TS3 and ETS
BREAKERS
DISPLAY UNIT
Startstop PB
INDICATION PANEL
Throttle
Load meter
ECS
ALERTER LAMP
DRIVERrsquoS CABIN
99
RBB LPB1 LPB2 DLCB HLPBDEB (Eng)
DEB (Car)
Keep Always ON
CEBRFCB PLPB FPB MPCB AGFB
MB2 MB1
Additional Breakers
NEWLY PROVIDED ITEMSCircuit BreakersThe nomenclatures of all the breakers and switches are almost all same as conventional WDG3A locomotive
Existing Breakers Lighting Circuit
Breakers LPB1 LPB2 HLPB DLCB
MB1 ndash Main Breaker 1MB2 ndash Main Breaker 2AGFB - Auxiliary Generator Field BreakerMFPB1amp2 - Master Fuel Pump BreakersMCB1amp2 - Master Control BreakersFPB ndash Fuel Pump BreakerCEB ndash Crankcase Exhauster BreakerDEB (Eng)- Dust Exhauster Breaker (Eng Side)DEB (Carb) - Dust Exhauster Breaker (Carb Side)RBB - Rectifier Blower BreakerRFCB - Radiator Fan Clutch Breaker (ERF)
MPCBMPCB - - Microprocessor circuit Microprocessor circuit breakerbreaker
PLPBPLPB - - Pre lubrication Pump Pre lubrication Pump BreakerBreaker
DO not switch OFF MPCBDO not switch OFF MPCBSwitch OFF MCB1 amp MCB2 Switch OFF MCB1 amp MCB2
while crankingwhile cranking
Extra (New) BreakersExtra (New) Breakers
EXTRA (NEW )SWITCHESEXTRA (NEW )SWITCHES
lsquolsquoTE LIMITrsquo switch provided TE LIMITrsquo switch provided on the CB panel near the on the CB panel near the compartment light compartment light switchesswitches For normal working keep this For normal working keep this
switch in lsquoswitch in lsquoNORMALrsquo NORMALrsquo position position To limit Tractive effort keep To limit Tractive effort keep
this switch in this switch in lsquoLIMITrsquo lsquoLIMITrsquo position position
WITH TE LIMIT SWITCH IN lsquoLIMITrsquo POSITION WHEN NOT REQUIRED
MAY RESULT IN STALLING OF TRAIN
1 Tractive Effort Limit Switch
1313
2 MOTOR CUTOUT 2 MOTOR CUTOUT SWITCHES SWITCHES
Conventional Rotary type Conventional Rotary type motor cut out switch is motor cut out switch is replaced with 6 individual replaced with 6 individual toggle switches toggle switches
MCOS1 MCOS2 MCOS3 MCOS1 MCOS2 MCOS3 MCOS4 MCOS5 amp MCOS6 MCOS4 MCOS5 amp MCOS6 These switches are located These switches are located
inside the control panel inside the control panel behind the left side door behind the left side door
Normally all these switches Normally all these switches are in are in ON ON (down) position (down) position
Loco Pilot can switch OFF Loco Pilot can switch OFF the required MCOS switches the required MCOS switches up to 5 at a time up to 5 at a time
SENSOR S amp LOCATION
Current sensors(14) --- provided at front panelVoltage sensors (5) --- provided at back panelTemperature sensors(3) --- Two provided in Expresser room and
one is provided in back panelPressure sensors(5) --- provided at nose compartmentSpeed sensors(7) --- six connected to each TM and one connected (ESS) to left cam gear cover
ENGINE SPEED SENSOR (ESS)
VCD Isolation switch
RELAYSGR1amp2 Cut out switch
ADBS4 Nos
CONTROL UNIT
MICRO PROCESSOR FRONT PANNEL
MICRO PROCESSOR CONTROL UNIT
bullThis is the main control equipment in the Microprocessor control system
bullThis is located at the Front panel in the place of ECP
bullThe total control system is functionally divided into different modules
bullThese modules are dustproof amp plug in type cards for easy replacement
bullThe connectors of these modules are unique They can not be inserted at wrong place
bullIt is having 19 cards
MEDHA MICRO PROCESSOR DISPLAY UNIT
It is provided at left side of ECS switch on the control panel Display unit is the main interface between the user and the equipment It displays group wise parameters of the locomotive as selected by driver user It displays fault messages Digital inputs and outputs can be tested through the unit
Main MenuMain Menu
2) Display Mode
4) Exit
1) Faults
3) Test Mode
Faults - Submenu
1 View Faults2 Clear Faults
2121
View Faults - SubmenuView Faults - SubmenuThe registered Faults at run time will be displayed The registered Faults at run time will be displayed
User can navigate through the faults using down User can navigate through the faults using down arrow till the following message is displayedarrow till the following message is displayed
lsquoNo More Faults Press Menu Key to exitrsquo
MENU
Clear Faults - SubmenuClear Faults - Submenu
The registered Faults at run time will be displayed User can navigate through the faults using down arrow key and clear the faults by pressing lsquo0rsquo key Till the following message is displayed
Use lsquo0rsquo key to Clear
Depending upon the level of the fault the display prompts pass code for some faults to clear them After entering the valid pass code the fault can be cleared
No More Faults Press Menu Key to exit
MENU
Display Mode SubmenuDisplay Mode Submenu
1 Excitation
2 Auxiliary
3 Wheel Slip
4 Mixed
MENU
5 Driver Display6 MCBG status
7 Collective Data8 Digital inputs
MENU
Display Mode SubmenuDisplay Mode Submenu
9 Digital Outputs10 HP status
MENU
Test ModeTest Mode
NOT APPLICABLE TO LOCO PILOTS
DRIVER DISPLAY
The Driver default display has got three screens
1 IDLE Screen2 Motoring Screen3 Braking Screen
Respective screens are changed automatically based on the control stand signals while the locomotive operation is being set by the Driver
In each screen relative parameters are displayed as shown below
ADB(Analog distribution box)
There are 4 Analog Distribution BoxesThese are located at Front panel in the place of VRPTRP
Each ADB Unit generates isolated low voltage source required for the sensors connected to it from the locomotive control voltage of 72V
Each ADB can handle 8 analog inputs from various sensors and transmit them to the Control unit
RDB(RPM Distribution box)
bullRPM Distribution Unit is similar to the Analog Distribution Unit but handles RPM signals
bullThis is located at Front panel in the place of VRPTRP
bullAll the six traction motor RPM sensors are connected to this RDB
ADDITIONAL FEATURES WITH MEP-6601 Limitation of Power to 4th notch with Failure of Dust Exhauster BreakersFailure of dust exhauster motors clog the filters and Quantity of inlet air is reduced Hence the power is limited to 4th notch along with a warning message if the notch above 4th notch
2 Limitation of Power to 4th notch with Failure of RBB or Diode HOTFailure of RBB result in no cooling to power rectifier Similarly if amount of cooling to Rectifier diodes is less due to ay reasons the diodes become HOT In order to safeguard the power rectifier the engine power is restricted to 4th notch
3 Cold Engine based loadingSoon after cranking the engine speed is restricted based on the lube oil temperature till the lube oil temperature is raised up to 60 degcent To improve lubrication
4 Power De-ration from T3 setting to T4 setting (90 to 95 degCent)The engine power is de-rated by 20 of the notch power for every degree raise from 90 deg Onwards
5 8th notch RPM at hottest TemperatureWhen the Engine temperature reached to T4 setting (95 Deg Cen) Engine RPM is raised to 8th notch automatically by cutting of power for faster cooling of engine
6LOW IDLE FEATURE
When the locomotive is in IDLE for more than 10 minutes the engine RPM is reduced to 350 by energising AV and DV for reducing the fuel oil consumption This is posssible only with governors having this option
7Built in Auto switching ON Flasher lights with Simplified circuit
8Self Load box Testing
9Ambient temperature based battery charging
10Event recorder
11Prelubrication
12MULTI RESET VIGILANCE CONTROL DEVICE One VCD reset push button is provided on the control desk near Master handle
MULTI RESET VIGILANCE CONTROL DEVICE
WHY VCD
To stop the train If driver is INCAPACITATED An intelligent vigilance control device with multi-reset feature has
been provided to stop the train if the driver is incapacitated
1048714 The device alerts the driver for every 60 seconds before stopping train If the driver is not alert incapacitated VCD applies there by Engine will come to Idle and penalty brakes will be applied and the train stops
1048714 One VCD alerting lamp provided on each control desk near LED indication panel
1048714 One VCD reset push button is provided on the control desk near master handle
VCD disable unit is provided in the Control PanelPenalty brake application Valve is provided in nose compartment
VCD STARTS FUNCTION
Soon after circuit breakers MB1 MB2 MPCB MFPB1 MFPB2 MCB1 ampMCB2 are switched ON and BCP is less than 21 Kg Sqcm
VCD DOES NOT FUNCTION
If BCP is more than 21 KgSqcm and Loco speed is zero
What VCD do before Penalty BrakesVCD alerts the driver once in every 60 seconds through a Blinking LEDif none of the following activities are performed with in 60 sec1048714 Increase Decrease notch1048708 Application Release of A91048708 Application release of DB1048708 Change of DB level1048708 Operation of GF switches1048708 Change of RH position1048708 Operation of Horn buttons1048708 Operation of Sander buttons1048708 Pressing of VCD reset button
What Driver has to doPerform any of the following loco operations as required or Press VCDRESET button to suppress warning lamp
What if Driver does not respond to VCD warnings
1048708 The Blinking LED continues for 17 seconds1048708 After 17 seconds a buzzer is switched ON along with Blinking LED1048708 A message lsquo 2019 - VCD time out Press VCD reset switchrsquo is displayed on the screen1048708 The blinking LED and buzzer continues for another 17 seconds
What if Driver does not respond up to 94 seconds
The MEP-660 assumes that the driver is dead incapacitated and appliesPenalty Brakes after 94 (60+17+17) seconds and the following changes takesplace in the locomotive1 A message lsquo2301 - VCD Applied Penalty Brakesrsquo will be displayed on the Display Panel2 VCD counter is increased by 13 Buzzer is switched OFF4 LED continue to blink for another 35sec5 BP is reduced to 28 KgSqcm6 Loco Formation brakes are applied7 Engine speed is brought to IDLE8 GF power contactor is dropped out9 Power contactors are dropped out after Master handle brought to IDLE
FOR RELEASING THE PENALTY BRAKES
1 Bring the Throttle to IDLE2 Wait till the blinking LED is OFF3 Wait till the Loco speed is reduced to zero4 Press VCD RESET button
WHILE WAITING FOR SIGNAL IN THE YARD
Apply loco brakes with SA9 to suppress VCD function Ensure BCP is morethan 21 kgSqcm
NOTEbull Always press lsquoVCD resetrsquo switch whenever lsquoVCD LEDrsquo is blinkingbull Donrsquot forget to apply loco brakes while loco is in stand
THE microP LOCOMOTIVE IS WORKING AS REAR LOCOMOTIVE IN MU OPERATION
1 While the locomotive is working as rear loco in MU operation the VCD is not required2 The circuit breakers MCB1 and MCB2 which are available on control desks of Rear Loco should be switched off after making MU set up3 The VCD function is automatically isolated in rear loco and the display shows lsquoVCD in MUrsquo message in the 4th line indicating the status of the VCD4 otherwise ndash What happens 5 Rear loco does not respond to lead loco signalsVCD counterAn incrementing counter by name lsquoVCD Counterrsquo is added in the displayscreen This parameter is visible only when the loco is in idle position Thecount is incremented by one as and when the VCD applies penalty brakeindicating that the driver is not alert
NOTE Please note the reading of this lsquoVCD Counterrsquo on the display unit andrecord the same in the driverrsquos logbook while taking over charge of thelocomotive
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
5 MISCELLANEOUS ITEMS REMOVED
Transition Excitation Transformer (TET)
Armature Current control reactor (ACCR)
Stabilizing panel (Stab Panel)
Voltage regulator current limiting shunt (VRCLS)
Load ammeter shunt (LAS)
Engine Temperature Switches ndash TS1 TS2 TS3 and ETS
BREAKERS
DISPLAY UNIT
Startstop PB
INDICATION PANEL
Throttle
Load meter
ECS
ALERTER LAMP
DRIVERrsquoS CABIN
99
RBB LPB1 LPB2 DLCB HLPBDEB (Eng)
DEB (Car)
Keep Always ON
CEBRFCB PLPB FPB MPCB AGFB
MB2 MB1
Additional Breakers
NEWLY PROVIDED ITEMSCircuit BreakersThe nomenclatures of all the breakers and switches are almost all same as conventional WDG3A locomotive
Existing Breakers Lighting Circuit
Breakers LPB1 LPB2 HLPB DLCB
MB1 ndash Main Breaker 1MB2 ndash Main Breaker 2AGFB - Auxiliary Generator Field BreakerMFPB1amp2 - Master Fuel Pump BreakersMCB1amp2 - Master Control BreakersFPB ndash Fuel Pump BreakerCEB ndash Crankcase Exhauster BreakerDEB (Eng)- Dust Exhauster Breaker (Eng Side)DEB (Carb) - Dust Exhauster Breaker (Carb Side)RBB - Rectifier Blower BreakerRFCB - Radiator Fan Clutch Breaker (ERF)
MPCBMPCB - - Microprocessor circuit Microprocessor circuit breakerbreaker
PLPBPLPB - - Pre lubrication Pump Pre lubrication Pump BreakerBreaker
DO not switch OFF MPCBDO not switch OFF MPCBSwitch OFF MCB1 amp MCB2 Switch OFF MCB1 amp MCB2
while crankingwhile cranking
Extra (New) BreakersExtra (New) Breakers
EXTRA (NEW )SWITCHESEXTRA (NEW )SWITCHES
lsquolsquoTE LIMITrsquo switch provided TE LIMITrsquo switch provided on the CB panel near the on the CB panel near the compartment light compartment light switchesswitches For normal working keep this For normal working keep this
switch in lsquoswitch in lsquoNORMALrsquo NORMALrsquo position position To limit Tractive effort keep To limit Tractive effort keep
this switch in this switch in lsquoLIMITrsquo lsquoLIMITrsquo position position
WITH TE LIMIT SWITCH IN lsquoLIMITrsquo POSITION WHEN NOT REQUIRED
MAY RESULT IN STALLING OF TRAIN
1 Tractive Effort Limit Switch
1313
2 MOTOR CUTOUT 2 MOTOR CUTOUT SWITCHES SWITCHES
Conventional Rotary type Conventional Rotary type motor cut out switch is motor cut out switch is replaced with 6 individual replaced with 6 individual toggle switches toggle switches
MCOS1 MCOS2 MCOS3 MCOS1 MCOS2 MCOS3 MCOS4 MCOS5 amp MCOS6 MCOS4 MCOS5 amp MCOS6 These switches are located These switches are located
inside the control panel inside the control panel behind the left side door behind the left side door
Normally all these switches Normally all these switches are in are in ON ON (down) position (down) position
Loco Pilot can switch OFF Loco Pilot can switch OFF the required MCOS switches the required MCOS switches up to 5 at a time up to 5 at a time
SENSOR S amp LOCATION
Current sensors(14) --- provided at front panelVoltage sensors (5) --- provided at back panelTemperature sensors(3) --- Two provided in Expresser room and
one is provided in back panelPressure sensors(5) --- provided at nose compartmentSpeed sensors(7) --- six connected to each TM and one connected (ESS) to left cam gear cover
ENGINE SPEED SENSOR (ESS)
VCD Isolation switch
RELAYSGR1amp2 Cut out switch
ADBS4 Nos
CONTROL UNIT
MICRO PROCESSOR FRONT PANNEL
MICRO PROCESSOR CONTROL UNIT
bullThis is the main control equipment in the Microprocessor control system
bullThis is located at the Front panel in the place of ECP
bullThe total control system is functionally divided into different modules
bullThese modules are dustproof amp plug in type cards for easy replacement
bullThe connectors of these modules are unique They can not be inserted at wrong place
bullIt is having 19 cards
MEDHA MICRO PROCESSOR DISPLAY UNIT
It is provided at left side of ECS switch on the control panel Display unit is the main interface between the user and the equipment It displays group wise parameters of the locomotive as selected by driver user It displays fault messages Digital inputs and outputs can be tested through the unit
Main MenuMain Menu
2) Display Mode
4) Exit
1) Faults
3) Test Mode
Faults - Submenu
1 View Faults2 Clear Faults
2121
View Faults - SubmenuView Faults - SubmenuThe registered Faults at run time will be displayed The registered Faults at run time will be displayed
User can navigate through the faults using down User can navigate through the faults using down arrow till the following message is displayedarrow till the following message is displayed
lsquoNo More Faults Press Menu Key to exitrsquo
MENU
Clear Faults - SubmenuClear Faults - Submenu
The registered Faults at run time will be displayed User can navigate through the faults using down arrow key and clear the faults by pressing lsquo0rsquo key Till the following message is displayed
Use lsquo0rsquo key to Clear
Depending upon the level of the fault the display prompts pass code for some faults to clear them After entering the valid pass code the fault can be cleared
No More Faults Press Menu Key to exit
MENU
Display Mode SubmenuDisplay Mode Submenu
1 Excitation
2 Auxiliary
3 Wheel Slip
4 Mixed
MENU
5 Driver Display6 MCBG status
7 Collective Data8 Digital inputs
MENU
Display Mode SubmenuDisplay Mode Submenu
9 Digital Outputs10 HP status
MENU
Test ModeTest Mode
NOT APPLICABLE TO LOCO PILOTS
DRIVER DISPLAY
The Driver default display has got three screens
1 IDLE Screen2 Motoring Screen3 Braking Screen
Respective screens are changed automatically based on the control stand signals while the locomotive operation is being set by the Driver
In each screen relative parameters are displayed as shown below
ADB(Analog distribution box)
There are 4 Analog Distribution BoxesThese are located at Front panel in the place of VRPTRP
Each ADB Unit generates isolated low voltage source required for the sensors connected to it from the locomotive control voltage of 72V
Each ADB can handle 8 analog inputs from various sensors and transmit them to the Control unit
RDB(RPM Distribution box)
bullRPM Distribution Unit is similar to the Analog Distribution Unit but handles RPM signals
bullThis is located at Front panel in the place of VRPTRP
bullAll the six traction motor RPM sensors are connected to this RDB
ADDITIONAL FEATURES WITH MEP-6601 Limitation of Power to 4th notch with Failure of Dust Exhauster BreakersFailure of dust exhauster motors clog the filters and Quantity of inlet air is reduced Hence the power is limited to 4th notch along with a warning message if the notch above 4th notch
2 Limitation of Power to 4th notch with Failure of RBB or Diode HOTFailure of RBB result in no cooling to power rectifier Similarly if amount of cooling to Rectifier diodes is less due to ay reasons the diodes become HOT In order to safeguard the power rectifier the engine power is restricted to 4th notch
3 Cold Engine based loadingSoon after cranking the engine speed is restricted based on the lube oil temperature till the lube oil temperature is raised up to 60 degcent To improve lubrication
4 Power De-ration from T3 setting to T4 setting (90 to 95 degCent)The engine power is de-rated by 20 of the notch power for every degree raise from 90 deg Onwards
5 8th notch RPM at hottest TemperatureWhen the Engine temperature reached to T4 setting (95 Deg Cen) Engine RPM is raised to 8th notch automatically by cutting of power for faster cooling of engine
6LOW IDLE FEATURE
When the locomotive is in IDLE for more than 10 minutes the engine RPM is reduced to 350 by energising AV and DV for reducing the fuel oil consumption This is posssible only with governors having this option
7Built in Auto switching ON Flasher lights with Simplified circuit
8Self Load box Testing
9Ambient temperature based battery charging
10Event recorder
11Prelubrication
12MULTI RESET VIGILANCE CONTROL DEVICE One VCD reset push button is provided on the control desk near Master handle
MULTI RESET VIGILANCE CONTROL DEVICE
WHY VCD
To stop the train If driver is INCAPACITATED An intelligent vigilance control device with multi-reset feature has
been provided to stop the train if the driver is incapacitated
1048714 The device alerts the driver for every 60 seconds before stopping train If the driver is not alert incapacitated VCD applies there by Engine will come to Idle and penalty brakes will be applied and the train stops
1048714 One VCD alerting lamp provided on each control desk near LED indication panel
1048714 One VCD reset push button is provided on the control desk near master handle
VCD disable unit is provided in the Control PanelPenalty brake application Valve is provided in nose compartment
VCD STARTS FUNCTION
Soon after circuit breakers MB1 MB2 MPCB MFPB1 MFPB2 MCB1 ampMCB2 are switched ON and BCP is less than 21 Kg Sqcm
VCD DOES NOT FUNCTION
If BCP is more than 21 KgSqcm and Loco speed is zero
What VCD do before Penalty BrakesVCD alerts the driver once in every 60 seconds through a Blinking LEDif none of the following activities are performed with in 60 sec1048714 Increase Decrease notch1048708 Application Release of A91048708 Application release of DB1048708 Change of DB level1048708 Operation of GF switches1048708 Change of RH position1048708 Operation of Horn buttons1048708 Operation of Sander buttons1048708 Pressing of VCD reset button
What Driver has to doPerform any of the following loco operations as required or Press VCDRESET button to suppress warning lamp
What if Driver does not respond to VCD warnings
1048708 The Blinking LED continues for 17 seconds1048708 After 17 seconds a buzzer is switched ON along with Blinking LED1048708 A message lsquo 2019 - VCD time out Press VCD reset switchrsquo is displayed on the screen1048708 The blinking LED and buzzer continues for another 17 seconds
What if Driver does not respond up to 94 seconds
The MEP-660 assumes that the driver is dead incapacitated and appliesPenalty Brakes after 94 (60+17+17) seconds and the following changes takesplace in the locomotive1 A message lsquo2301 - VCD Applied Penalty Brakesrsquo will be displayed on the Display Panel2 VCD counter is increased by 13 Buzzer is switched OFF4 LED continue to blink for another 35sec5 BP is reduced to 28 KgSqcm6 Loco Formation brakes are applied7 Engine speed is brought to IDLE8 GF power contactor is dropped out9 Power contactors are dropped out after Master handle brought to IDLE
FOR RELEASING THE PENALTY BRAKES
1 Bring the Throttle to IDLE2 Wait till the blinking LED is OFF3 Wait till the Loco speed is reduced to zero4 Press VCD RESET button
WHILE WAITING FOR SIGNAL IN THE YARD
Apply loco brakes with SA9 to suppress VCD function Ensure BCP is morethan 21 kgSqcm
NOTEbull Always press lsquoVCD resetrsquo switch whenever lsquoVCD LEDrsquo is blinkingbull Donrsquot forget to apply loco brakes while loco is in stand
THE microP LOCOMOTIVE IS WORKING AS REAR LOCOMOTIVE IN MU OPERATION
1 While the locomotive is working as rear loco in MU operation the VCD is not required2 The circuit breakers MCB1 and MCB2 which are available on control desks of Rear Loco should be switched off after making MU set up3 The VCD function is automatically isolated in rear loco and the display shows lsquoVCD in MUrsquo message in the 4th line indicating the status of the VCD4 otherwise ndash What happens 5 Rear loco does not respond to lead loco signalsVCD counterAn incrementing counter by name lsquoVCD Counterrsquo is added in the displayscreen This parameter is visible only when the loco is in idle position Thecount is incremented by one as and when the VCD applies penalty brakeindicating that the driver is not alert
NOTE Please note the reading of this lsquoVCD Counterrsquo on the display unit andrecord the same in the driverrsquos logbook while taking over charge of thelocomotive
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
BREAKERS
DISPLAY UNIT
Startstop PB
INDICATION PANEL
Throttle
Load meter
ECS
ALERTER LAMP
DRIVERrsquoS CABIN
99
RBB LPB1 LPB2 DLCB HLPBDEB (Eng)
DEB (Car)
Keep Always ON
CEBRFCB PLPB FPB MPCB AGFB
MB2 MB1
Additional Breakers
NEWLY PROVIDED ITEMSCircuit BreakersThe nomenclatures of all the breakers and switches are almost all same as conventional WDG3A locomotive
Existing Breakers Lighting Circuit
Breakers LPB1 LPB2 HLPB DLCB
MB1 ndash Main Breaker 1MB2 ndash Main Breaker 2AGFB - Auxiliary Generator Field BreakerMFPB1amp2 - Master Fuel Pump BreakersMCB1amp2 - Master Control BreakersFPB ndash Fuel Pump BreakerCEB ndash Crankcase Exhauster BreakerDEB (Eng)- Dust Exhauster Breaker (Eng Side)DEB (Carb) - Dust Exhauster Breaker (Carb Side)RBB - Rectifier Blower BreakerRFCB - Radiator Fan Clutch Breaker (ERF)
MPCBMPCB - - Microprocessor circuit Microprocessor circuit breakerbreaker
PLPBPLPB - - Pre lubrication Pump Pre lubrication Pump BreakerBreaker
DO not switch OFF MPCBDO not switch OFF MPCBSwitch OFF MCB1 amp MCB2 Switch OFF MCB1 amp MCB2
while crankingwhile cranking
Extra (New) BreakersExtra (New) Breakers
EXTRA (NEW )SWITCHESEXTRA (NEW )SWITCHES
lsquolsquoTE LIMITrsquo switch provided TE LIMITrsquo switch provided on the CB panel near the on the CB panel near the compartment light compartment light switchesswitches For normal working keep this For normal working keep this
switch in lsquoswitch in lsquoNORMALrsquo NORMALrsquo position position To limit Tractive effort keep To limit Tractive effort keep
this switch in this switch in lsquoLIMITrsquo lsquoLIMITrsquo position position
WITH TE LIMIT SWITCH IN lsquoLIMITrsquo POSITION WHEN NOT REQUIRED
MAY RESULT IN STALLING OF TRAIN
1 Tractive Effort Limit Switch
1313
2 MOTOR CUTOUT 2 MOTOR CUTOUT SWITCHES SWITCHES
Conventional Rotary type Conventional Rotary type motor cut out switch is motor cut out switch is replaced with 6 individual replaced with 6 individual toggle switches toggle switches
MCOS1 MCOS2 MCOS3 MCOS1 MCOS2 MCOS3 MCOS4 MCOS5 amp MCOS6 MCOS4 MCOS5 amp MCOS6 These switches are located These switches are located
inside the control panel inside the control panel behind the left side door behind the left side door
Normally all these switches Normally all these switches are in are in ON ON (down) position (down) position
Loco Pilot can switch OFF Loco Pilot can switch OFF the required MCOS switches the required MCOS switches up to 5 at a time up to 5 at a time
SENSOR S amp LOCATION
Current sensors(14) --- provided at front panelVoltage sensors (5) --- provided at back panelTemperature sensors(3) --- Two provided in Expresser room and
one is provided in back panelPressure sensors(5) --- provided at nose compartmentSpeed sensors(7) --- six connected to each TM and one connected (ESS) to left cam gear cover
ENGINE SPEED SENSOR (ESS)
VCD Isolation switch
RELAYSGR1amp2 Cut out switch
ADBS4 Nos
CONTROL UNIT
MICRO PROCESSOR FRONT PANNEL
MICRO PROCESSOR CONTROL UNIT
bullThis is the main control equipment in the Microprocessor control system
bullThis is located at the Front panel in the place of ECP
bullThe total control system is functionally divided into different modules
bullThese modules are dustproof amp plug in type cards for easy replacement
bullThe connectors of these modules are unique They can not be inserted at wrong place
bullIt is having 19 cards
MEDHA MICRO PROCESSOR DISPLAY UNIT
It is provided at left side of ECS switch on the control panel Display unit is the main interface between the user and the equipment It displays group wise parameters of the locomotive as selected by driver user It displays fault messages Digital inputs and outputs can be tested through the unit
Main MenuMain Menu
2) Display Mode
4) Exit
1) Faults
3) Test Mode
Faults - Submenu
1 View Faults2 Clear Faults
2121
View Faults - SubmenuView Faults - SubmenuThe registered Faults at run time will be displayed The registered Faults at run time will be displayed
User can navigate through the faults using down User can navigate through the faults using down arrow till the following message is displayedarrow till the following message is displayed
lsquoNo More Faults Press Menu Key to exitrsquo
MENU
Clear Faults - SubmenuClear Faults - Submenu
The registered Faults at run time will be displayed User can navigate through the faults using down arrow key and clear the faults by pressing lsquo0rsquo key Till the following message is displayed
Use lsquo0rsquo key to Clear
Depending upon the level of the fault the display prompts pass code for some faults to clear them After entering the valid pass code the fault can be cleared
No More Faults Press Menu Key to exit
MENU
Display Mode SubmenuDisplay Mode Submenu
1 Excitation
2 Auxiliary
3 Wheel Slip
4 Mixed
MENU
5 Driver Display6 MCBG status
7 Collective Data8 Digital inputs
MENU
Display Mode SubmenuDisplay Mode Submenu
9 Digital Outputs10 HP status
MENU
Test ModeTest Mode
NOT APPLICABLE TO LOCO PILOTS
DRIVER DISPLAY
The Driver default display has got three screens
1 IDLE Screen2 Motoring Screen3 Braking Screen
Respective screens are changed automatically based on the control stand signals while the locomotive operation is being set by the Driver
In each screen relative parameters are displayed as shown below
ADB(Analog distribution box)
There are 4 Analog Distribution BoxesThese are located at Front panel in the place of VRPTRP
Each ADB Unit generates isolated low voltage source required for the sensors connected to it from the locomotive control voltage of 72V
Each ADB can handle 8 analog inputs from various sensors and transmit them to the Control unit
RDB(RPM Distribution box)
bullRPM Distribution Unit is similar to the Analog Distribution Unit but handles RPM signals
bullThis is located at Front panel in the place of VRPTRP
bullAll the six traction motor RPM sensors are connected to this RDB
ADDITIONAL FEATURES WITH MEP-6601 Limitation of Power to 4th notch with Failure of Dust Exhauster BreakersFailure of dust exhauster motors clog the filters and Quantity of inlet air is reduced Hence the power is limited to 4th notch along with a warning message if the notch above 4th notch
2 Limitation of Power to 4th notch with Failure of RBB or Diode HOTFailure of RBB result in no cooling to power rectifier Similarly if amount of cooling to Rectifier diodes is less due to ay reasons the diodes become HOT In order to safeguard the power rectifier the engine power is restricted to 4th notch
3 Cold Engine based loadingSoon after cranking the engine speed is restricted based on the lube oil temperature till the lube oil temperature is raised up to 60 degcent To improve lubrication
4 Power De-ration from T3 setting to T4 setting (90 to 95 degCent)The engine power is de-rated by 20 of the notch power for every degree raise from 90 deg Onwards
5 8th notch RPM at hottest TemperatureWhen the Engine temperature reached to T4 setting (95 Deg Cen) Engine RPM is raised to 8th notch automatically by cutting of power for faster cooling of engine
6LOW IDLE FEATURE
When the locomotive is in IDLE for more than 10 minutes the engine RPM is reduced to 350 by energising AV and DV for reducing the fuel oil consumption This is posssible only with governors having this option
7Built in Auto switching ON Flasher lights with Simplified circuit
8Self Load box Testing
9Ambient temperature based battery charging
10Event recorder
11Prelubrication
12MULTI RESET VIGILANCE CONTROL DEVICE One VCD reset push button is provided on the control desk near Master handle
MULTI RESET VIGILANCE CONTROL DEVICE
WHY VCD
To stop the train If driver is INCAPACITATED An intelligent vigilance control device with multi-reset feature has
been provided to stop the train if the driver is incapacitated
1048714 The device alerts the driver for every 60 seconds before stopping train If the driver is not alert incapacitated VCD applies there by Engine will come to Idle and penalty brakes will be applied and the train stops
1048714 One VCD alerting lamp provided on each control desk near LED indication panel
1048714 One VCD reset push button is provided on the control desk near master handle
VCD disable unit is provided in the Control PanelPenalty brake application Valve is provided in nose compartment
VCD STARTS FUNCTION
Soon after circuit breakers MB1 MB2 MPCB MFPB1 MFPB2 MCB1 ampMCB2 are switched ON and BCP is less than 21 Kg Sqcm
VCD DOES NOT FUNCTION
If BCP is more than 21 KgSqcm and Loco speed is zero
What VCD do before Penalty BrakesVCD alerts the driver once in every 60 seconds through a Blinking LEDif none of the following activities are performed with in 60 sec1048714 Increase Decrease notch1048708 Application Release of A91048708 Application release of DB1048708 Change of DB level1048708 Operation of GF switches1048708 Change of RH position1048708 Operation of Horn buttons1048708 Operation of Sander buttons1048708 Pressing of VCD reset button
What Driver has to doPerform any of the following loco operations as required or Press VCDRESET button to suppress warning lamp
What if Driver does not respond to VCD warnings
1048708 The Blinking LED continues for 17 seconds1048708 After 17 seconds a buzzer is switched ON along with Blinking LED1048708 A message lsquo 2019 - VCD time out Press VCD reset switchrsquo is displayed on the screen1048708 The blinking LED and buzzer continues for another 17 seconds
What if Driver does not respond up to 94 seconds
The MEP-660 assumes that the driver is dead incapacitated and appliesPenalty Brakes after 94 (60+17+17) seconds and the following changes takesplace in the locomotive1 A message lsquo2301 - VCD Applied Penalty Brakesrsquo will be displayed on the Display Panel2 VCD counter is increased by 13 Buzzer is switched OFF4 LED continue to blink for another 35sec5 BP is reduced to 28 KgSqcm6 Loco Formation brakes are applied7 Engine speed is brought to IDLE8 GF power contactor is dropped out9 Power contactors are dropped out after Master handle brought to IDLE
FOR RELEASING THE PENALTY BRAKES
1 Bring the Throttle to IDLE2 Wait till the blinking LED is OFF3 Wait till the Loco speed is reduced to zero4 Press VCD RESET button
WHILE WAITING FOR SIGNAL IN THE YARD
Apply loco brakes with SA9 to suppress VCD function Ensure BCP is morethan 21 kgSqcm
NOTEbull Always press lsquoVCD resetrsquo switch whenever lsquoVCD LEDrsquo is blinkingbull Donrsquot forget to apply loco brakes while loco is in stand
THE microP LOCOMOTIVE IS WORKING AS REAR LOCOMOTIVE IN MU OPERATION
1 While the locomotive is working as rear loco in MU operation the VCD is not required2 The circuit breakers MCB1 and MCB2 which are available on control desks of Rear Loco should be switched off after making MU set up3 The VCD function is automatically isolated in rear loco and the display shows lsquoVCD in MUrsquo message in the 4th line indicating the status of the VCD4 otherwise ndash What happens 5 Rear loco does not respond to lead loco signalsVCD counterAn incrementing counter by name lsquoVCD Counterrsquo is added in the displayscreen This parameter is visible only when the loco is in idle position Thecount is incremented by one as and when the VCD applies penalty brakeindicating that the driver is not alert
NOTE Please note the reading of this lsquoVCD Counterrsquo on the display unit andrecord the same in the driverrsquos logbook while taking over charge of thelocomotive
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
99
RBB LPB1 LPB2 DLCB HLPBDEB (Eng)
DEB (Car)
Keep Always ON
CEBRFCB PLPB FPB MPCB AGFB
MB2 MB1
Additional Breakers
NEWLY PROVIDED ITEMSCircuit BreakersThe nomenclatures of all the breakers and switches are almost all same as conventional WDG3A locomotive
Existing Breakers Lighting Circuit
Breakers LPB1 LPB2 HLPB DLCB
MB1 ndash Main Breaker 1MB2 ndash Main Breaker 2AGFB - Auxiliary Generator Field BreakerMFPB1amp2 - Master Fuel Pump BreakersMCB1amp2 - Master Control BreakersFPB ndash Fuel Pump BreakerCEB ndash Crankcase Exhauster BreakerDEB (Eng)- Dust Exhauster Breaker (Eng Side)DEB (Carb) - Dust Exhauster Breaker (Carb Side)RBB - Rectifier Blower BreakerRFCB - Radiator Fan Clutch Breaker (ERF)
MPCBMPCB - - Microprocessor circuit Microprocessor circuit breakerbreaker
PLPBPLPB - - Pre lubrication Pump Pre lubrication Pump BreakerBreaker
DO not switch OFF MPCBDO not switch OFF MPCBSwitch OFF MCB1 amp MCB2 Switch OFF MCB1 amp MCB2
while crankingwhile cranking
Extra (New) BreakersExtra (New) Breakers
EXTRA (NEW )SWITCHESEXTRA (NEW )SWITCHES
lsquolsquoTE LIMITrsquo switch provided TE LIMITrsquo switch provided on the CB panel near the on the CB panel near the compartment light compartment light switchesswitches For normal working keep this For normal working keep this
switch in lsquoswitch in lsquoNORMALrsquo NORMALrsquo position position To limit Tractive effort keep To limit Tractive effort keep
this switch in this switch in lsquoLIMITrsquo lsquoLIMITrsquo position position
WITH TE LIMIT SWITCH IN lsquoLIMITrsquo POSITION WHEN NOT REQUIRED
MAY RESULT IN STALLING OF TRAIN
1 Tractive Effort Limit Switch
1313
2 MOTOR CUTOUT 2 MOTOR CUTOUT SWITCHES SWITCHES
Conventional Rotary type Conventional Rotary type motor cut out switch is motor cut out switch is replaced with 6 individual replaced with 6 individual toggle switches toggle switches
MCOS1 MCOS2 MCOS3 MCOS1 MCOS2 MCOS3 MCOS4 MCOS5 amp MCOS6 MCOS4 MCOS5 amp MCOS6 These switches are located These switches are located
inside the control panel inside the control panel behind the left side door behind the left side door
Normally all these switches Normally all these switches are in are in ON ON (down) position (down) position
Loco Pilot can switch OFF Loco Pilot can switch OFF the required MCOS switches the required MCOS switches up to 5 at a time up to 5 at a time
SENSOR S amp LOCATION
Current sensors(14) --- provided at front panelVoltage sensors (5) --- provided at back panelTemperature sensors(3) --- Two provided in Expresser room and
one is provided in back panelPressure sensors(5) --- provided at nose compartmentSpeed sensors(7) --- six connected to each TM and one connected (ESS) to left cam gear cover
ENGINE SPEED SENSOR (ESS)
VCD Isolation switch
RELAYSGR1amp2 Cut out switch
ADBS4 Nos
CONTROL UNIT
MICRO PROCESSOR FRONT PANNEL
MICRO PROCESSOR CONTROL UNIT
bullThis is the main control equipment in the Microprocessor control system
bullThis is located at the Front panel in the place of ECP
bullThe total control system is functionally divided into different modules
bullThese modules are dustproof amp plug in type cards for easy replacement
bullThe connectors of these modules are unique They can not be inserted at wrong place
bullIt is having 19 cards
MEDHA MICRO PROCESSOR DISPLAY UNIT
It is provided at left side of ECS switch on the control panel Display unit is the main interface between the user and the equipment It displays group wise parameters of the locomotive as selected by driver user It displays fault messages Digital inputs and outputs can be tested through the unit
Main MenuMain Menu
2) Display Mode
4) Exit
1) Faults
3) Test Mode
Faults - Submenu
1 View Faults2 Clear Faults
2121
View Faults - SubmenuView Faults - SubmenuThe registered Faults at run time will be displayed The registered Faults at run time will be displayed
User can navigate through the faults using down User can navigate through the faults using down arrow till the following message is displayedarrow till the following message is displayed
lsquoNo More Faults Press Menu Key to exitrsquo
MENU
Clear Faults - SubmenuClear Faults - Submenu
The registered Faults at run time will be displayed User can navigate through the faults using down arrow key and clear the faults by pressing lsquo0rsquo key Till the following message is displayed
Use lsquo0rsquo key to Clear
Depending upon the level of the fault the display prompts pass code for some faults to clear them After entering the valid pass code the fault can be cleared
No More Faults Press Menu Key to exit
MENU
Display Mode SubmenuDisplay Mode Submenu
1 Excitation
2 Auxiliary
3 Wheel Slip
4 Mixed
MENU
5 Driver Display6 MCBG status
7 Collective Data8 Digital inputs
MENU
Display Mode SubmenuDisplay Mode Submenu
9 Digital Outputs10 HP status
MENU
Test ModeTest Mode
NOT APPLICABLE TO LOCO PILOTS
DRIVER DISPLAY
The Driver default display has got three screens
1 IDLE Screen2 Motoring Screen3 Braking Screen
Respective screens are changed automatically based on the control stand signals while the locomotive operation is being set by the Driver
In each screen relative parameters are displayed as shown below
ADB(Analog distribution box)
There are 4 Analog Distribution BoxesThese are located at Front panel in the place of VRPTRP
Each ADB Unit generates isolated low voltage source required for the sensors connected to it from the locomotive control voltage of 72V
Each ADB can handle 8 analog inputs from various sensors and transmit them to the Control unit
RDB(RPM Distribution box)
bullRPM Distribution Unit is similar to the Analog Distribution Unit but handles RPM signals
bullThis is located at Front panel in the place of VRPTRP
bullAll the six traction motor RPM sensors are connected to this RDB
ADDITIONAL FEATURES WITH MEP-6601 Limitation of Power to 4th notch with Failure of Dust Exhauster BreakersFailure of dust exhauster motors clog the filters and Quantity of inlet air is reduced Hence the power is limited to 4th notch along with a warning message if the notch above 4th notch
2 Limitation of Power to 4th notch with Failure of RBB or Diode HOTFailure of RBB result in no cooling to power rectifier Similarly if amount of cooling to Rectifier diodes is less due to ay reasons the diodes become HOT In order to safeguard the power rectifier the engine power is restricted to 4th notch
3 Cold Engine based loadingSoon after cranking the engine speed is restricted based on the lube oil temperature till the lube oil temperature is raised up to 60 degcent To improve lubrication
4 Power De-ration from T3 setting to T4 setting (90 to 95 degCent)The engine power is de-rated by 20 of the notch power for every degree raise from 90 deg Onwards
5 8th notch RPM at hottest TemperatureWhen the Engine temperature reached to T4 setting (95 Deg Cen) Engine RPM is raised to 8th notch automatically by cutting of power for faster cooling of engine
6LOW IDLE FEATURE
When the locomotive is in IDLE for more than 10 minutes the engine RPM is reduced to 350 by energising AV and DV for reducing the fuel oil consumption This is posssible only with governors having this option
7Built in Auto switching ON Flasher lights with Simplified circuit
8Self Load box Testing
9Ambient temperature based battery charging
10Event recorder
11Prelubrication
12MULTI RESET VIGILANCE CONTROL DEVICE One VCD reset push button is provided on the control desk near Master handle
MULTI RESET VIGILANCE CONTROL DEVICE
WHY VCD
To stop the train If driver is INCAPACITATED An intelligent vigilance control device with multi-reset feature has
been provided to stop the train if the driver is incapacitated
1048714 The device alerts the driver for every 60 seconds before stopping train If the driver is not alert incapacitated VCD applies there by Engine will come to Idle and penalty brakes will be applied and the train stops
1048714 One VCD alerting lamp provided on each control desk near LED indication panel
1048714 One VCD reset push button is provided on the control desk near master handle
VCD disable unit is provided in the Control PanelPenalty brake application Valve is provided in nose compartment
VCD STARTS FUNCTION
Soon after circuit breakers MB1 MB2 MPCB MFPB1 MFPB2 MCB1 ampMCB2 are switched ON and BCP is less than 21 Kg Sqcm
VCD DOES NOT FUNCTION
If BCP is more than 21 KgSqcm and Loco speed is zero
What VCD do before Penalty BrakesVCD alerts the driver once in every 60 seconds through a Blinking LEDif none of the following activities are performed with in 60 sec1048714 Increase Decrease notch1048708 Application Release of A91048708 Application release of DB1048708 Change of DB level1048708 Operation of GF switches1048708 Change of RH position1048708 Operation of Horn buttons1048708 Operation of Sander buttons1048708 Pressing of VCD reset button
What Driver has to doPerform any of the following loco operations as required or Press VCDRESET button to suppress warning lamp
What if Driver does not respond to VCD warnings
1048708 The Blinking LED continues for 17 seconds1048708 After 17 seconds a buzzer is switched ON along with Blinking LED1048708 A message lsquo 2019 - VCD time out Press VCD reset switchrsquo is displayed on the screen1048708 The blinking LED and buzzer continues for another 17 seconds
What if Driver does not respond up to 94 seconds
The MEP-660 assumes that the driver is dead incapacitated and appliesPenalty Brakes after 94 (60+17+17) seconds and the following changes takesplace in the locomotive1 A message lsquo2301 - VCD Applied Penalty Brakesrsquo will be displayed on the Display Panel2 VCD counter is increased by 13 Buzzer is switched OFF4 LED continue to blink for another 35sec5 BP is reduced to 28 KgSqcm6 Loco Formation brakes are applied7 Engine speed is brought to IDLE8 GF power contactor is dropped out9 Power contactors are dropped out after Master handle brought to IDLE
FOR RELEASING THE PENALTY BRAKES
1 Bring the Throttle to IDLE2 Wait till the blinking LED is OFF3 Wait till the Loco speed is reduced to zero4 Press VCD RESET button
WHILE WAITING FOR SIGNAL IN THE YARD
Apply loco brakes with SA9 to suppress VCD function Ensure BCP is morethan 21 kgSqcm
NOTEbull Always press lsquoVCD resetrsquo switch whenever lsquoVCD LEDrsquo is blinkingbull Donrsquot forget to apply loco brakes while loco is in stand
THE microP LOCOMOTIVE IS WORKING AS REAR LOCOMOTIVE IN MU OPERATION
1 While the locomotive is working as rear loco in MU operation the VCD is not required2 The circuit breakers MCB1 and MCB2 which are available on control desks of Rear Loco should be switched off after making MU set up3 The VCD function is automatically isolated in rear loco and the display shows lsquoVCD in MUrsquo message in the 4th line indicating the status of the VCD4 otherwise ndash What happens 5 Rear loco does not respond to lead loco signalsVCD counterAn incrementing counter by name lsquoVCD Counterrsquo is added in the displayscreen This parameter is visible only when the loco is in idle position Thecount is incremented by one as and when the VCD applies penalty brakeindicating that the driver is not alert
NOTE Please note the reading of this lsquoVCD Counterrsquo on the display unit andrecord the same in the driverrsquos logbook while taking over charge of thelocomotive
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
Existing Breakers Lighting Circuit
Breakers LPB1 LPB2 HLPB DLCB
MB1 ndash Main Breaker 1MB2 ndash Main Breaker 2AGFB - Auxiliary Generator Field BreakerMFPB1amp2 - Master Fuel Pump BreakersMCB1amp2 - Master Control BreakersFPB ndash Fuel Pump BreakerCEB ndash Crankcase Exhauster BreakerDEB (Eng)- Dust Exhauster Breaker (Eng Side)DEB (Carb) - Dust Exhauster Breaker (Carb Side)RBB - Rectifier Blower BreakerRFCB - Radiator Fan Clutch Breaker (ERF)
MPCBMPCB - - Microprocessor circuit Microprocessor circuit breakerbreaker
PLPBPLPB - - Pre lubrication Pump Pre lubrication Pump BreakerBreaker
DO not switch OFF MPCBDO not switch OFF MPCBSwitch OFF MCB1 amp MCB2 Switch OFF MCB1 amp MCB2
while crankingwhile cranking
Extra (New) BreakersExtra (New) Breakers
EXTRA (NEW )SWITCHESEXTRA (NEW )SWITCHES
lsquolsquoTE LIMITrsquo switch provided TE LIMITrsquo switch provided on the CB panel near the on the CB panel near the compartment light compartment light switchesswitches For normal working keep this For normal working keep this
switch in lsquoswitch in lsquoNORMALrsquo NORMALrsquo position position To limit Tractive effort keep To limit Tractive effort keep
this switch in this switch in lsquoLIMITrsquo lsquoLIMITrsquo position position
WITH TE LIMIT SWITCH IN lsquoLIMITrsquo POSITION WHEN NOT REQUIRED
MAY RESULT IN STALLING OF TRAIN
1 Tractive Effort Limit Switch
1313
2 MOTOR CUTOUT 2 MOTOR CUTOUT SWITCHES SWITCHES
Conventional Rotary type Conventional Rotary type motor cut out switch is motor cut out switch is replaced with 6 individual replaced with 6 individual toggle switches toggle switches
MCOS1 MCOS2 MCOS3 MCOS1 MCOS2 MCOS3 MCOS4 MCOS5 amp MCOS6 MCOS4 MCOS5 amp MCOS6 These switches are located These switches are located
inside the control panel inside the control panel behind the left side door behind the left side door
Normally all these switches Normally all these switches are in are in ON ON (down) position (down) position
Loco Pilot can switch OFF Loco Pilot can switch OFF the required MCOS switches the required MCOS switches up to 5 at a time up to 5 at a time
SENSOR S amp LOCATION
Current sensors(14) --- provided at front panelVoltage sensors (5) --- provided at back panelTemperature sensors(3) --- Two provided in Expresser room and
one is provided in back panelPressure sensors(5) --- provided at nose compartmentSpeed sensors(7) --- six connected to each TM and one connected (ESS) to left cam gear cover
ENGINE SPEED SENSOR (ESS)
VCD Isolation switch
RELAYSGR1amp2 Cut out switch
ADBS4 Nos
CONTROL UNIT
MICRO PROCESSOR FRONT PANNEL
MICRO PROCESSOR CONTROL UNIT
bullThis is the main control equipment in the Microprocessor control system
bullThis is located at the Front panel in the place of ECP
bullThe total control system is functionally divided into different modules
bullThese modules are dustproof amp plug in type cards for easy replacement
bullThe connectors of these modules are unique They can not be inserted at wrong place
bullIt is having 19 cards
MEDHA MICRO PROCESSOR DISPLAY UNIT
It is provided at left side of ECS switch on the control panel Display unit is the main interface between the user and the equipment It displays group wise parameters of the locomotive as selected by driver user It displays fault messages Digital inputs and outputs can be tested through the unit
Main MenuMain Menu
2) Display Mode
4) Exit
1) Faults
3) Test Mode
Faults - Submenu
1 View Faults2 Clear Faults
2121
View Faults - SubmenuView Faults - SubmenuThe registered Faults at run time will be displayed The registered Faults at run time will be displayed
User can navigate through the faults using down User can navigate through the faults using down arrow till the following message is displayedarrow till the following message is displayed
lsquoNo More Faults Press Menu Key to exitrsquo
MENU
Clear Faults - SubmenuClear Faults - Submenu
The registered Faults at run time will be displayed User can navigate through the faults using down arrow key and clear the faults by pressing lsquo0rsquo key Till the following message is displayed
Use lsquo0rsquo key to Clear
Depending upon the level of the fault the display prompts pass code for some faults to clear them After entering the valid pass code the fault can be cleared
No More Faults Press Menu Key to exit
MENU
Display Mode SubmenuDisplay Mode Submenu
1 Excitation
2 Auxiliary
3 Wheel Slip
4 Mixed
MENU
5 Driver Display6 MCBG status
7 Collective Data8 Digital inputs
MENU
Display Mode SubmenuDisplay Mode Submenu
9 Digital Outputs10 HP status
MENU
Test ModeTest Mode
NOT APPLICABLE TO LOCO PILOTS
DRIVER DISPLAY
The Driver default display has got three screens
1 IDLE Screen2 Motoring Screen3 Braking Screen
Respective screens are changed automatically based on the control stand signals while the locomotive operation is being set by the Driver
In each screen relative parameters are displayed as shown below
ADB(Analog distribution box)
There are 4 Analog Distribution BoxesThese are located at Front panel in the place of VRPTRP
Each ADB Unit generates isolated low voltage source required for the sensors connected to it from the locomotive control voltage of 72V
Each ADB can handle 8 analog inputs from various sensors and transmit them to the Control unit
RDB(RPM Distribution box)
bullRPM Distribution Unit is similar to the Analog Distribution Unit but handles RPM signals
bullThis is located at Front panel in the place of VRPTRP
bullAll the six traction motor RPM sensors are connected to this RDB
ADDITIONAL FEATURES WITH MEP-6601 Limitation of Power to 4th notch with Failure of Dust Exhauster BreakersFailure of dust exhauster motors clog the filters and Quantity of inlet air is reduced Hence the power is limited to 4th notch along with a warning message if the notch above 4th notch
2 Limitation of Power to 4th notch with Failure of RBB or Diode HOTFailure of RBB result in no cooling to power rectifier Similarly if amount of cooling to Rectifier diodes is less due to ay reasons the diodes become HOT In order to safeguard the power rectifier the engine power is restricted to 4th notch
3 Cold Engine based loadingSoon after cranking the engine speed is restricted based on the lube oil temperature till the lube oil temperature is raised up to 60 degcent To improve lubrication
4 Power De-ration from T3 setting to T4 setting (90 to 95 degCent)The engine power is de-rated by 20 of the notch power for every degree raise from 90 deg Onwards
5 8th notch RPM at hottest TemperatureWhen the Engine temperature reached to T4 setting (95 Deg Cen) Engine RPM is raised to 8th notch automatically by cutting of power for faster cooling of engine
6LOW IDLE FEATURE
When the locomotive is in IDLE for more than 10 minutes the engine RPM is reduced to 350 by energising AV and DV for reducing the fuel oil consumption This is posssible only with governors having this option
7Built in Auto switching ON Flasher lights with Simplified circuit
8Self Load box Testing
9Ambient temperature based battery charging
10Event recorder
11Prelubrication
12MULTI RESET VIGILANCE CONTROL DEVICE One VCD reset push button is provided on the control desk near Master handle
MULTI RESET VIGILANCE CONTROL DEVICE
WHY VCD
To stop the train If driver is INCAPACITATED An intelligent vigilance control device with multi-reset feature has
been provided to stop the train if the driver is incapacitated
1048714 The device alerts the driver for every 60 seconds before stopping train If the driver is not alert incapacitated VCD applies there by Engine will come to Idle and penalty brakes will be applied and the train stops
1048714 One VCD alerting lamp provided on each control desk near LED indication panel
1048714 One VCD reset push button is provided on the control desk near master handle
VCD disable unit is provided in the Control PanelPenalty brake application Valve is provided in nose compartment
VCD STARTS FUNCTION
Soon after circuit breakers MB1 MB2 MPCB MFPB1 MFPB2 MCB1 ampMCB2 are switched ON and BCP is less than 21 Kg Sqcm
VCD DOES NOT FUNCTION
If BCP is more than 21 KgSqcm and Loco speed is zero
What VCD do before Penalty BrakesVCD alerts the driver once in every 60 seconds through a Blinking LEDif none of the following activities are performed with in 60 sec1048714 Increase Decrease notch1048708 Application Release of A91048708 Application release of DB1048708 Change of DB level1048708 Operation of GF switches1048708 Change of RH position1048708 Operation of Horn buttons1048708 Operation of Sander buttons1048708 Pressing of VCD reset button
What Driver has to doPerform any of the following loco operations as required or Press VCDRESET button to suppress warning lamp
What if Driver does not respond to VCD warnings
1048708 The Blinking LED continues for 17 seconds1048708 After 17 seconds a buzzer is switched ON along with Blinking LED1048708 A message lsquo 2019 - VCD time out Press VCD reset switchrsquo is displayed on the screen1048708 The blinking LED and buzzer continues for another 17 seconds
What if Driver does not respond up to 94 seconds
The MEP-660 assumes that the driver is dead incapacitated and appliesPenalty Brakes after 94 (60+17+17) seconds and the following changes takesplace in the locomotive1 A message lsquo2301 - VCD Applied Penalty Brakesrsquo will be displayed on the Display Panel2 VCD counter is increased by 13 Buzzer is switched OFF4 LED continue to blink for another 35sec5 BP is reduced to 28 KgSqcm6 Loco Formation brakes are applied7 Engine speed is brought to IDLE8 GF power contactor is dropped out9 Power contactors are dropped out after Master handle brought to IDLE
FOR RELEASING THE PENALTY BRAKES
1 Bring the Throttle to IDLE2 Wait till the blinking LED is OFF3 Wait till the Loco speed is reduced to zero4 Press VCD RESET button
WHILE WAITING FOR SIGNAL IN THE YARD
Apply loco brakes with SA9 to suppress VCD function Ensure BCP is morethan 21 kgSqcm
NOTEbull Always press lsquoVCD resetrsquo switch whenever lsquoVCD LEDrsquo is blinkingbull Donrsquot forget to apply loco brakes while loco is in stand
THE microP LOCOMOTIVE IS WORKING AS REAR LOCOMOTIVE IN MU OPERATION
1 While the locomotive is working as rear loco in MU operation the VCD is not required2 The circuit breakers MCB1 and MCB2 which are available on control desks of Rear Loco should be switched off after making MU set up3 The VCD function is automatically isolated in rear loco and the display shows lsquoVCD in MUrsquo message in the 4th line indicating the status of the VCD4 otherwise ndash What happens 5 Rear loco does not respond to lead loco signalsVCD counterAn incrementing counter by name lsquoVCD Counterrsquo is added in the displayscreen This parameter is visible only when the loco is in idle position Thecount is incremented by one as and when the VCD applies penalty brakeindicating that the driver is not alert
NOTE Please note the reading of this lsquoVCD Counterrsquo on the display unit andrecord the same in the driverrsquos logbook while taking over charge of thelocomotive
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
MPCBMPCB - - Microprocessor circuit Microprocessor circuit breakerbreaker
PLPBPLPB - - Pre lubrication Pump Pre lubrication Pump BreakerBreaker
DO not switch OFF MPCBDO not switch OFF MPCBSwitch OFF MCB1 amp MCB2 Switch OFF MCB1 amp MCB2
while crankingwhile cranking
Extra (New) BreakersExtra (New) Breakers
EXTRA (NEW )SWITCHESEXTRA (NEW )SWITCHES
lsquolsquoTE LIMITrsquo switch provided TE LIMITrsquo switch provided on the CB panel near the on the CB panel near the compartment light compartment light switchesswitches For normal working keep this For normal working keep this
switch in lsquoswitch in lsquoNORMALrsquo NORMALrsquo position position To limit Tractive effort keep To limit Tractive effort keep
this switch in this switch in lsquoLIMITrsquo lsquoLIMITrsquo position position
WITH TE LIMIT SWITCH IN lsquoLIMITrsquo POSITION WHEN NOT REQUIRED
MAY RESULT IN STALLING OF TRAIN
1 Tractive Effort Limit Switch
1313
2 MOTOR CUTOUT 2 MOTOR CUTOUT SWITCHES SWITCHES
Conventional Rotary type Conventional Rotary type motor cut out switch is motor cut out switch is replaced with 6 individual replaced with 6 individual toggle switches toggle switches
MCOS1 MCOS2 MCOS3 MCOS1 MCOS2 MCOS3 MCOS4 MCOS5 amp MCOS6 MCOS4 MCOS5 amp MCOS6 These switches are located These switches are located
inside the control panel inside the control panel behind the left side door behind the left side door
Normally all these switches Normally all these switches are in are in ON ON (down) position (down) position
Loco Pilot can switch OFF Loco Pilot can switch OFF the required MCOS switches the required MCOS switches up to 5 at a time up to 5 at a time
SENSOR S amp LOCATION
Current sensors(14) --- provided at front panelVoltage sensors (5) --- provided at back panelTemperature sensors(3) --- Two provided in Expresser room and
one is provided in back panelPressure sensors(5) --- provided at nose compartmentSpeed sensors(7) --- six connected to each TM and one connected (ESS) to left cam gear cover
ENGINE SPEED SENSOR (ESS)
VCD Isolation switch
RELAYSGR1amp2 Cut out switch
ADBS4 Nos
CONTROL UNIT
MICRO PROCESSOR FRONT PANNEL
MICRO PROCESSOR CONTROL UNIT
bullThis is the main control equipment in the Microprocessor control system
bullThis is located at the Front panel in the place of ECP
bullThe total control system is functionally divided into different modules
bullThese modules are dustproof amp plug in type cards for easy replacement
bullThe connectors of these modules are unique They can not be inserted at wrong place
bullIt is having 19 cards
MEDHA MICRO PROCESSOR DISPLAY UNIT
It is provided at left side of ECS switch on the control panel Display unit is the main interface between the user and the equipment It displays group wise parameters of the locomotive as selected by driver user It displays fault messages Digital inputs and outputs can be tested through the unit
Main MenuMain Menu
2) Display Mode
4) Exit
1) Faults
3) Test Mode
Faults - Submenu
1 View Faults2 Clear Faults
2121
View Faults - SubmenuView Faults - SubmenuThe registered Faults at run time will be displayed The registered Faults at run time will be displayed
User can navigate through the faults using down User can navigate through the faults using down arrow till the following message is displayedarrow till the following message is displayed
lsquoNo More Faults Press Menu Key to exitrsquo
MENU
Clear Faults - SubmenuClear Faults - Submenu
The registered Faults at run time will be displayed User can navigate through the faults using down arrow key and clear the faults by pressing lsquo0rsquo key Till the following message is displayed
Use lsquo0rsquo key to Clear
Depending upon the level of the fault the display prompts pass code for some faults to clear them After entering the valid pass code the fault can be cleared
No More Faults Press Menu Key to exit
MENU
Display Mode SubmenuDisplay Mode Submenu
1 Excitation
2 Auxiliary
3 Wheel Slip
4 Mixed
MENU
5 Driver Display6 MCBG status
7 Collective Data8 Digital inputs
MENU
Display Mode SubmenuDisplay Mode Submenu
9 Digital Outputs10 HP status
MENU
Test ModeTest Mode
NOT APPLICABLE TO LOCO PILOTS
DRIVER DISPLAY
The Driver default display has got three screens
1 IDLE Screen2 Motoring Screen3 Braking Screen
Respective screens are changed automatically based on the control stand signals while the locomotive operation is being set by the Driver
In each screen relative parameters are displayed as shown below
ADB(Analog distribution box)
There are 4 Analog Distribution BoxesThese are located at Front panel in the place of VRPTRP
Each ADB Unit generates isolated low voltage source required for the sensors connected to it from the locomotive control voltage of 72V
Each ADB can handle 8 analog inputs from various sensors and transmit them to the Control unit
RDB(RPM Distribution box)
bullRPM Distribution Unit is similar to the Analog Distribution Unit but handles RPM signals
bullThis is located at Front panel in the place of VRPTRP
bullAll the six traction motor RPM sensors are connected to this RDB
ADDITIONAL FEATURES WITH MEP-6601 Limitation of Power to 4th notch with Failure of Dust Exhauster BreakersFailure of dust exhauster motors clog the filters and Quantity of inlet air is reduced Hence the power is limited to 4th notch along with a warning message if the notch above 4th notch
2 Limitation of Power to 4th notch with Failure of RBB or Diode HOTFailure of RBB result in no cooling to power rectifier Similarly if amount of cooling to Rectifier diodes is less due to ay reasons the diodes become HOT In order to safeguard the power rectifier the engine power is restricted to 4th notch
3 Cold Engine based loadingSoon after cranking the engine speed is restricted based on the lube oil temperature till the lube oil temperature is raised up to 60 degcent To improve lubrication
4 Power De-ration from T3 setting to T4 setting (90 to 95 degCent)The engine power is de-rated by 20 of the notch power for every degree raise from 90 deg Onwards
5 8th notch RPM at hottest TemperatureWhen the Engine temperature reached to T4 setting (95 Deg Cen) Engine RPM is raised to 8th notch automatically by cutting of power for faster cooling of engine
6LOW IDLE FEATURE
When the locomotive is in IDLE for more than 10 minutes the engine RPM is reduced to 350 by energising AV and DV for reducing the fuel oil consumption This is posssible only with governors having this option
7Built in Auto switching ON Flasher lights with Simplified circuit
8Self Load box Testing
9Ambient temperature based battery charging
10Event recorder
11Prelubrication
12MULTI RESET VIGILANCE CONTROL DEVICE One VCD reset push button is provided on the control desk near Master handle
MULTI RESET VIGILANCE CONTROL DEVICE
WHY VCD
To stop the train If driver is INCAPACITATED An intelligent vigilance control device with multi-reset feature has
been provided to stop the train if the driver is incapacitated
1048714 The device alerts the driver for every 60 seconds before stopping train If the driver is not alert incapacitated VCD applies there by Engine will come to Idle and penalty brakes will be applied and the train stops
1048714 One VCD alerting lamp provided on each control desk near LED indication panel
1048714 One VCD reset push button is provided on the control desk near master handle
VCD disable unit is provided in the Control PanelPenalty brake application Valve is provided in nose compartment
VCD STARTS FUNCTION
Soon after circuit breakers MB1 MB2 MPCB MFPB1 MFPB2 MCB1 ampMCB2 are switched ON and BCP is less than 21 Kg Sqcm
VCD DOES NOT FUNCTION
If BCP is more than 21 KgSqcm and Loco speed is zero
What VCD do before Penalty BrakesVCD alerts the driver once in every 60 seconds through a Blinking LEDif none of the following activities are performed with in 60 sec1048714 Increase Decrease notch1048708 Application Release of A91048708 Application release of DB1048708 Change of DB level1048708 Operation of GF switches1048708 Change of RH position1048708 Operation of Horn buttons1048708 Operation of Sander buttons1048708 Pressing of VCD reset button
What Driver has to doPerform any of the following loco operations as required or Press VCDRESET button to suppress warning lamp
What if Driver does not respond to VCD warnings
1048708 The Blinking LED continues for 17 seconds1048708 After 17 seconds a buzzer is switched ON along with Blinking LED1048708 A message lsquo 2019 - VCD time out Press VCD reset switchrsquo is displayed on the screen1048708 The blinking LED and buzzer continues for another 17 seconds
What if Driver does not respond up to 94 seconds
The MEP-660 assumes that the driver is dead incapacitated and appliesPenalty Brakes after 94 (60+17+17) seconds and the following changes takesplace in the locomotive1 A message lsquo2301 - VCD Applied Penalty Brakesrsquo will be displayed on the Display Panel2 VCD counter is increased by 13 Buzzer is switched OFF4 LED continue to blink for another 35sec5 BP is reduced to 28 KgSqcm6 Loco Formation brakes are applied7 Engine speed is brought to IDLE8 GF power contactor is dropped out9 Power contactors are dropped out after Master handle brought to IDLE
FOR RELEASING THE PENALTY BRAKES
1 Bring the Throttle to IDLE2 Wait till the blinking LED is OFF3 Wait till the Loco speed is reduced to zero4 Press VCD RESET button
WHILE WAITING FOR SIGNAL IN THE YARD
Apply loco brakes with SA9 to suppress VCD function Ensure BCP is morethan 21 kgSqcm
NOTEbull Always press lsquoVCD resetrsquo switch whenever lsquoVCD LEDrsquo is blinkingbull Donrsquot forget to apply loco brakes while loco is in stand
THE microP LOCOMOTIVE IS WORKING AS REAR LOCOMOTIVE IN MU OPERATION
1 While the locomotive is working as rear loco in MU operation the VCD is not required2 The circuit breakers MCB1 and MCB2 which are available on control desks of Rear Loco should be switched off after making MU set up3 The VCD function is automatically isolated in rear loco and the display shows lsquoVCD in MUrsquo message in the 4th line indicating the status of the VCD4 otherwise ndash What happens 5 Rear loco does not respond to lead loco signalsVCD counterAn incrementing counter by name lsquoVCD Counterrsquo is added in the displayscreen This parameter is visible only when the loco is in idle position Thecount is incremented by one as and when the VCD applies penalty brakeindicating that the driver is not alert
NOTE Please note the reading of this lsquoVCD Counterrsquo on the display unit andrecord the same in the driverrsquos logbook while taking over charge of thelocomotive
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
EXTRA (NEW )SWITCHESEXTRA (NEW )SWITCHES
lsquolsquoTE LIMITrsquo switch provided TE LIMITrsquo switch provided on the CB panel near the on the CB panel near the compartment light compartment light switchesswitches For normal working keep this For normal working keep this
switch in lsquoswitch in lsquoNORMALrsquo NORMALrsquo position position To limit Tractive effort keep To limit Tractive effort keep
this switch in this switch in lsquoLIMITrsquo lsquoLIMITrsquo position position
WITH TE LIMIT SWITCH IN lsquoLIMITrsquo POSITION WHEN NOT REQUIRED
MAY RESULT IN STALLING OF TRAIN
1 Tractive Effort Limit Switch
1313
2 MOTOR CUTOUT 2 MOTOR CUTOUT SWITCHES SWITCHES
Conventional Rotary type Conventional Rotary type motor cut out switch is motor cut out switch is replaced with 6 individual replaced with 6 individual toggle switches toggle switches
MCOS1 MCOS2 MCOS3 MCOS1 MCOS2 MCOS3 MCOS4 MCOS5 amp MCOS6 MCOS4 MCOS5 amp MCOS6 These switches are located These switches are located
inside the control panel inside the control panel behind the left side door behind the left side door
Normally all these switches Normally all these switches are in are in ON ON (down) position (down) position
Loco Pilot can switch OFF Loco Pilot can switch OFF the required MCOS switches the required MCOS switches up to 5 at a time up to 5 at a time
SENSOR S amp LOCATION
Current sensors(14) --- provided at front panelVoltage sensors (5) --- provided at back panelTemperature sensors(3) --- Two provided in Expresser room and
one is provided in back panelPressure sensors(5) --- provided at nose compartmentSpeed sensors(7) --- six connected to each TM and one connected (ESS) to left cam gear cover
ENGINE SPEED SENSOR (ESS)
VCD Isolation switch
RELAYSGR1amp2 Cut out switch
ADBS4 Nos
CONTROL UNIT
MICRO PROCESSOR FRONT PANNEL
MICRO PROCESSOR CONTROL UNIT
bullThis is the main control equipment in the Microprocessor control system
bullThis is located at the Front panel in the place of ECP
bullThe total control system is functionally divided into different modules
bullThese modules are dustproof amp plug in type cards for easy replacement
bullThe connectors of these modules are unique They can not be inserted at wrong place
bullIt is having 19 cards
MEDHA MICRO PROCESSOR DISPLAY UNIT
It is provided at left side of ECS switch on the control panel Display unit is the main interface between the user and the equipment It displays group wise parameters of the locomotive as selected by driver user It displays fault messages Digital inputs and outputs can be tested through the unit
Main MenuMain Menu
2) Display Mode
4) Exit
1) Faults
3) Test Mode
Faults - Submenu
1 View Faults2 Clear Faults
2121
View Faults - SubmenuView Faults - SubmenuThe registered Faults at run time will be displayed The registered Faults at run time will be displayed
User can navigate through the faults using down User can navigate through the faults using down arrow till the following message is displayedarrow till the following message is displayed
lsquoNo More Faults Press Menu Key to exitrsquo
MENU
Clear Faults - SubmenuClear Faults - Submenu
The registered Faults at run time will be displayed User can navigate through the faults using down arrow key and clear the faults by pressing lsquo0rsquo key Till the following message is displayed
Use lsquo0rsquo key to Clear
Depending upon the level of the fault the display prompts pass code for some faults to clear them After entering the valid pass code the fault can be cleared
No More Faults Press Menu Key to exit
MENU
Display Mode SubmenuDisplay Mode Submenu
1 Excitation
2 Auxiliary
3 Wheel Slip
4 Mixed
MENU
5 Driver Display6 MCBG status
7 Collective Data8 Digital inputs
MENU
Display Mode SubmenuDisplay Mode Submenu
9 Digital Outputs10 HP status
MENU
Test ModeTest Mode
NOT APPLICABLE TO LOCO PILOTS
DRIVER DISPLAY
The Driver default display has got three screens
1 IDLE Screen2 Motoring Screen3 Braking Screen
Respective screens are changed automatically based on the control stand signals while the locomotive operation is being set by the Driver
In each screen relative parameters are displayed as shown below
ADB(Analog distribution box)
There are 4 Analog Distribution BoxesThese are located at Front panel in the place of VRPTRP
Each ADB Unit generates isolated low voltage source required for the sensors connected to it from the locomotive control voltage of 72V
Each ADB can handle 8 analog inputs from various sensors and transmit them to the Control unit
RDB(RPM Distribution box)
bullRPM Distribution Unit is similar to the Analog Distribution Unit but handles RPM signals
bullThis is located at Front panel in the place of VRPTRP
bullAll the six traction motor RPM sensors are connected to this RDB
ADDITIONAL FEATURES WITH MEP-6601 Limitation of Power to 4th notch with Failure of Dust Exhauster BreakersFailure of dust exhauster motors clog the filters and Quantity of inlet air is reduced Hence the power is limited to 4th notch along with a warning message if the notch above 4th notch
2 Limitation of Power to 4th notch with Failure of RBB or Diode HOTFailure of RBB result in no cooling to power rectifier Similarly if amount of cooling to Rectifier diodes is less due to ay reasons the diodes become HOT In order to safeguard the power rectifier the engine power is restricted to 4th notch
3 Cold Engine based loadingSoon after cranking the engine speed is restricted based on the lube oil temperature till the lube oil temperature is raised up to 60 degcent To improve lubrication
4 Power De-ration from T3 setting to T4 setting (90 to 95 degCent)The engine power is de-rated by 20 of the notch power for every degree raise from 90 deg Onwards
5 8th notch RPM at hottest TemperatureWhen the Engine temperature reached to T4 setting (95 Deg Cen) Engine RPM is raised to 8th notch automatically by cutting of power for faster cooling of engine
6LOW IDLE FEATURE
When the locomotive is in IDLE for more than 10 minutes the engine RPM is reduced to 350 by energising AV and DV for reducing the fuel oil consumption This is posssible only with governors having this option
7Built in Auto switching ON Flasher lights with Simplified circuit
8Self Load box Testing
9Ambient temperature based battery charging
10Event recorder
11Prelubrication
12MULTI RESET VIGILANCE CONTROL DEVICE One VCD reset push button is provided on the control desk near Master handle
MULTI RESET VIGILANCE CONTROL DEVICE
WHY VCD
To stop the train If driver is INCAPACITATED An intelligent vigilance control device with multi-reset feature has
been provided to stop the train if the driver is incapacitated
1048714 The device alerts the driver for every 60 seconds before stopping train If the driver is not alert incapacitated VCD applies there by Engine will come to Idle and penalty brakes will be applied and the train stops
1048714 One VCD alerting lamp provided on each control desk near LED indication panel
1048714 One VCD reset push button is provided on the control desk near master handle
VCD disable unit is provided in the Control PanelPenalty brake application Valve is provided in nose compartment
VCD STARTS FUNCTION
Soon after circuit breakers MB1 MB2 MPCB MFPB1 MFPB2 MCB1 ampMCB2 are switched ON and BCP is less than 21 Kg Sqcm
VCD DOES NOT FUNCTION
If BCP is more than 21 KgSqcm and Loco speed is zero
What VCD do before Penalty BrakesVCD alerts the driver once in every 60 seconds through a Blinking LEDif none of the following activities are performed with in 60 sec1048714 Increase Decrease notch1048708 Application Release of A91048708 Application release of DB1048708 Change of DB level1048708 Operation of GF switches1048708 Change of RH position1048708 Operation of Horn buttons1048708 Operation of Sander buttons1048708 Pressing of VCD reset button
What Driver has to doPerform any of the following loco operations as required or Press VCDRESET button to suppress warning lamp
What if Driver does not respond to VCD warnings
1048708 The Blinking LED continues for 17 seconds1048708 After 17 seconds a buzzer is switched ON along with Blinking LED1048708 A message lsquo 2019 - VCD time out Press VCD reset switchrsquo is displayed on the screen1048708 The blinking LED and buzzer continues for another 17 seconds
What if Driver does not respond up to 94 seconds
The MEP-660 assumes that the driver is dead incapacitated and appliesPenalty Brakes after 94 (60+17+17) seconds and the following changes takesplace in the locomotive1 A message lsquo2301 - VCD Applied Penalty Brakesrsquo will be displayed on the Display Panel2 VCD counter is increased by 13 Buzzer is switched OFF4 LED continue to blink for another 35sec5 BP is reduced to 28 KgSqcm6 Loco Formation brakes are applied7 Engine speed is brought to IDLE8 GF power contactor is dropped out9 Power contactors are dropped out after Master handle brought to IDLE
FOR RELEASING THE PENALTY BRAKES
1 Bring the Throttle to IDLE2 Wait till the blinking LED is OFF3 Wait till the Loco speed is reduced to zero4 Press VCD RESET button
WHILE WAITING FOR SIGNAL IN THE YARD
Apply loco brakes with SA9 to suppress VCD function Ensure BCP is morethan 21 kgSqcm
NOTEbull Always press lsquoVCD resetrsquo switch whenever lsquoVCD LEDrsquo is blinkingbull Donrsquot forget to apply loco brakes while loco is in stand
THE microP LOCOMOTIVE IS WORKING AS REAR LOCOMOTIVE IN MU OPERATION
1 While the locomotive is working as rear loco in MU operation the VCD is not required2 The circuit breakers MCB1 and MCB2 which are available on control desks of Rear Loco should be switched off after making MU set up3 The VCD function is automatically isolated in rear loco and the display shows lsquoVCD in MUrsquo message in the 4th line indicating the status of the VCD4 otherwise ndash What happens 5 Rear loco does not respond to lead loco signalsVCD counterAn incrementing counter by name lsquoVCD Counterrsquo is added in the displayscreen This parameter is visible only when the loco is in idle position Thecount is incremented by one as and when the VCD applies penalty brakeindicating that the driver is not alert
NOTE Please note the reading of this lsquoVCD Counterrsquo on the display unit andrecord the same in the driverrsquos logbook while taking over charge of thelocomotive
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
1313
2 MOTOR CUTOUT 2 MOTOR CUTOUT SWITCHES SWITCHES
Conventional Rotary type Conventional Rotary type motor cut out switch is motor cut out switch is replaced with 6 individual replaced with 6 individual toggle switches toggle switches
MCOS1 MCOS2 MCOS3 MCOS1 MCOS2 MCOS3 MCOS4 MCOS5 amp MCOS6 MCOS4 MCOS5 amp MCOS6 These switches are located These switches are located
inside the control panel inside the control panel behind the left side door behind the left side door
Normally all these switches Normally all these switches are in are in ON ON (down) position (down) position
Loco Pilot can switch OFF Loco Pilot can switch OFF the required MCOS switches the required MCOS switches up to 5 at a time up to 5 at a time
SENSOR S amp LOCATION
Current sensors(14) --- provided at front panelVoltage sensors (5) --- provided at back panelTemperature sensors(3) --- Two provided in Expresser room and
one is provided in back panelPressure sensors(5) --- provided at nose compartmentSpeed sensors(7) --- six connected to each TM and one connected (ESS) to left cam gear cover
ENGINE SPEED SENSOR (ESS)
VCD Isolation switch
RELAYSGR1amp2 Cut out switch
ADBS4 Nos
CONTROL UNIT
MICRO PROCESSOR FRONT PANNEL
MICRO PROCESSOR CONTROL UNIT
bullThis is the main control equipment in the Microprocessor control system
bullThis is located at the Front panel in the place of ECP
bullThe total control system is functionally divided into different modules
bullThese modules are dustproof amp plug in type cards for easy replacement
bullThe connectors of these modules are unique They can not be inserted at wrong place
bullIt is having 19 cards
MEDHA MICRO PROCESSOR DISPLAY UNIT
It is provided at left side of ECS switch on the control panel Display unit is the main interface between the user and the equipment It displays group wise parameters of the locomotive as selected by driver user It displays fault messages Digital inputs and outputs can be tested through the unit
Main MenuMain Menu
2) Display Mode
4) Exit
1) Faults
3) Test Mode
Faults - Submenu
1 View Faults2 Clear Faults
2121
View Faults - SubmenuView Faults - SubmenuThe registered Faults at run time will be displayed The registered Faults at run time will be displayed
User can navigate through the faults using down User can navigate through the faults using down arrow till the following message is displayedarrow till the following message is displayed
lsquoNo More Faults Press Menu Key to exitrsquo
MENU
Clear Faults - SubmenuClear Faults - Submenu
The registered Faults at run time will be displayed User can navigate through the faults using down arrow key and clear the faults by pressing lsquo0rsquo key Till the following message is displayed
Use lsquo0rsquo key to Clear
Depending upon the level of the fault the display prompts pass code for some faults to clear them After entering the valid pass code the fault can be cleared
No More Faults Press Menu Key to exit
MENU
Display Mode SubmenuDisplay Mode Submenu
1 Excitation
2 Auxiliary
3 Wheel Slip
4 Mixed
MENU
5 Driver Display6 MCBG status
7 Collective Data8 Digital inputs
MENU
Display Mode SubmenuDisplay Mode Submenu
9 Digital Outputs10 HP status
MENU
Test ModeTest Mode
NOT APPLICABLE TO LOCO PILOTS
DRIVER DISPLAY
The Driver default display has got three screens
1 IDLE Screen2 Motoring Screen3 Braking Screen
Respective screens are changed automatically based on the control stand signals while the locomotive operation is being set by the Driver
In each screen relative parameters are displayed as shown below
ADB(Analog distribution box)
There are 4 Analog Distribution BoxesThese are located at Front panel in the place of VRPTRP
Each ADB Unit generates isolated low voltage source required for the sensors connected to it from the locomotive control voltage of 72V
Each ADB can handle 8 analog inputs from various sensors and transmit them to the Control unit
RDB(RPM Distribution box)
bullRPM Distribution Unit is similar to the Analog Distribution Unit but handles RPM signals
bullThis is located at Front panel in the place of VRPTRP
bullAll the six traction motor RPM sensors are connected to this RDB
ADDITIONAL FEATURES WITH MEP-6601 Limitation of Power to 4th notch with Failure of Dust Exhauster BreakersFailure of dust exhauster motors clog the filters and Quantity of inlet air is reduced Hence the power is limited to 4th notch along with a warning message if the notch above 4th notch
2 Limitation of Power to 4th notch with Failure of RBB or Diode HOTFailure of RBB result in no cooling to power rectifier Similarly if amount of cooling to Rectifier diodes is less due to ay reasons the diodes become HOT In order to safeguard the power rectifier the engine power is restricted to 4th notch
3 Cold Engine based loadingSoon after cranking the engine speed is restricted based on the lube oil temperature till the lube oil temperature is raised up to 60 degcent To improve lubrication
4 Power De-ration from T3 setting to T4 setting (90 to 95 degCent)The engine power is de-rated by 20 of the notch power for every degree raise from 90 deg Onwards
5 8th notch RPM at hottest TemperatureWhen the Engine temperature reached to T4 setting (95 Deg Cen) Engine RPM is raised to 8th notch automatically by cutting of power for faster cooling of engine
6LOW IDLE FEATURE
When the locomotive is in IDLE for more than 10 minutes the engine RPM is reduced to 350 by energising AV and DV for reducing the fuel oil consumption This is posssible only with governors having this option
7Built in Auto switching ON Flasher lights with Simplified circuit
8Self Load box Testing
9Ambient temperature based battery charging
10Event recorder
11Prelubrication
12MULTI RESET VIGILANCE CONTROL DEVICE One VCD reset push button is provided on the control desk near Master handle
MULTI RESET VIGILANCE CONTROL DEVICE
WHY VCD
To stop the train If driver is INCAPACITATED An intelligent vigilance control device with multi-reset feature has
been provided to stop the train if the driver is incapacitated
1048714 The device alerts the driver for every 60 seconds before stopping train If the driver is not alert incapacitated VCD applies there by Engine will come to Idle and penalty brakes will be applied and the train stops
1048714 One VCD alerting lamp provided on each control desk near LED indication panel
1048714 One VCD reset push button is provided on the control desk near master handle
VCD disable unit is provided in the Control PanelPenalty brake application Valve is provided in nose compartment
VCD STARTS FUNCTION
Soon after circuit breakers MB1 MB2 MPCB MFPB1 MFPB2 MCB1 ampMCB2 are switched ON and BCP is less than 21 Kg Sqcm
VCD DOES NOT FUNCTION
If BCP is more than 21 KgSqcm and Loco speed is zero
What VCD do before Penalty BrakesVCD alerts the driver once in every 60 seconds through a Blinking LEDif none of the following activities are performed with in 60 sec1048714 Increase Decrease notch1048708 Application Release of A91048708 Application release of DB1048708 Change of DB level1048708 Operation of GF switches1048708 Change of RH position1048708 Operation of Horn buttons1048708 Operation of Sander buttons1048708 Pressing of VCD reset button
What Driver has to doPerform any of the following loco operations as required or Press VCDRESET button to suppress warning lamp
What if Driver does not respond to VCD warnings
1048708 The Blinking LED continues for 17 seconds1048708 After 17 seconds a buzzer is switched ON along with Blinking LED1048708 A message lsquo 2019 - VCD time out Press VCD reset switchrsquo is displayed on the screen1048708 The blinking LED and buzzer continues for another 17 seconds
What if Driver does not respond up to 94 seconds
The MEP-660 assumes that the driver is dead incapacitated and appliesPenalty Brakes after 94 (60+17+17) seconds and the following changes takesplace in the locomotive1 A message lsquo2301 - VCD Applied Penalty Brakesrsquo will be displayed on the Display Panel2 VCD counter is increased by 13 Buzzer is switched OFF4 LED continue to blink for another 35sec5 BP is reduced to 28 KgSqcm6 Loco Formation brakes are applied7 Engine speed is brought to IDLE8 GF power contactor is dropped out9 Power contactors are dropped out after Master handle brought to IDLE
FOR RELEASING THE PENALTY BRAKES
1 Bring the Throttle to IDLE2 Wait till the blinking LED is OFF3 Wait till the Loco speed is reduced to zero4 Press VCD RESET button
WHILE WAITING FOR SIGNAL IN THE YARD
Apply loco brakes with SA9 to suppress VCD function Ensure BCP is morethan 21 kgSqcm
NOTEbull Always press lsquoVCD resetrsquo switch whenever lsquoVCD LEDrsquo is blinkingbull Donrsquot forget to apply loco brakes while loco is in stand
THE microP LOCOMOTIVE IS WORKING AS REAR LOCOMOTIVE IN MU OPERATION
1 While the locomotive is working as rear loco in MU operation the VCD is not required2 The circuit breakers MCB1 and MCB2 which are available on control desks of Rear Loco should be switched off after making MU set up3 The VCD function is automatically isolated in rear loco and the display shows lsquoVCD in MUrsquo message in the 4th line indicating the status of the VCD4 otherwise ndash What happens 5 Rear loco does not respond to lead loco signalsVCD counterAn incrementing counter by name lsquoVCD Counterrsquo is added in the displayscreen This parameter is visible only when the loco is in idle position Thecount is incremented by one as and when the VCD applies penalty brakeindicating that the driver is not alert
NOTE Please note the reading of this lsquoVCD Counterrsquo on the display unit andrecord the same in the driverrsquos logbook while taking over charge of thelocomotive
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
SENSOR S amp LOCATION
Current sensors(14) --- provided at front panelVoltage sensors (5) --- provided at back panelTemperature sensors(3) --- Two provided in Expresser room and
one is provided in back panelPressure sensors(5) --- provided at nose compartmentSpeed sensors(7) --- six connected to each TM and one connected (ESS) to left cam gear cover
ENGINE SPEED SENSOR (ESS)
VCD Isolation switch
RELAYSGR1amp2 Cut out switch
ADBS4 Nos
CONTROL UNIT
MICRO PROCESSOR FRONT PANNEL
MICRO PROCESSOR CONTROL UNIT
bullThis is the main control equipment in the Microprocessor control system
bullThis is located at the Front panel in the place of ECP
bullThe total control system is functionally divided into different modules
bullThese modules are dustproof amp plug in type cards for easy replacement
bullThe connectors of these modules are unique They can not be inserted at wrong place
bullIt is having 19 cards
MEDHA MICRO PROCESSOR DISPLAY UNIT
It is provided at left side of ECS switch on the control panel Display unit is the main interface between the user and the equipment It displays group wise parameters of the locomotive as selected by driver user It displays fault messages Digital inputs and outputs can be tested through the unit
Main MenuMain Menu
2) Display Mode
4) Exit
1) Faults
3) Test Mode
Faults - Submenu
1 View Faults2 Clear Faults
2121
View Faults - SubmenuView Faults - SubmenuThe registered Faults at run time will be displayed The registered Faults at run time will be displayed
User can navigate through the faults using down User can navigate through the faults using down arrow till the following message is displayedarrow till the following message is displayed
lsquoNo More Faults Press Menu Key to exitrsquo
MENU
Clear Faults - SubmenuClear Faults - Submenu
The registered Faults at run time will be displayed User can navigate through the faults using down arrow key and clear the faults by pressing lsquo0rsquo key Till the following message is displayed
Use lsquo0rsquo key to Clear
Depending upon the level of the fault the display prompts pass code for some faults to clear them After entering the valid pass code the fault can be cleared
No More Faults Press Menu Key to exit
MENU
Display Mode SubmenuDisplay Mode Submenu
1 Excitation
2 Auxiliary
3 Wheel Slip
4 Mixed
MENU
5 Driver Display6 MCBG status
7 Collective Data8 Digital inputs
MENU
Display Mode SubmenuDisplay Mode Submenu
9 Digital Outputs10 HP status
MENU
Test ModeTest Mode
NOT APPLICABLE TO LOCO PILOTS
DRIVER DISPLAY
The Driver default display has got three screens
1 IDLE Screen2 Motoring Screen3 Braking Screen
Respective screens are changed automatically based on the control stand signals while the locomotive operation is being set by the Driver
In each screen relative parameters are displayed as shown below
ADB(Analog distribution box)
There are 4 Analog Distribution BoxesThese are located at Front panel in the place of VRPTRP
Each ADB Unit generates isolated low voltage source required for the sensors connected to it from the locomotive control voltage of 72V
Each ADB can handle 8 analog inputs from various sensors and transmit them to the Control unit
RDB(RPM Distribution box)
bullRPM Distribution Unit is similar to the Analog Distribution Unit but handles RPM signals
bullThis is located at Front panel in the place of VRPTRP
bullAll the six traction motor RPM sensors are connected to this RDB
ADDITIONAL FEATURES WITH MEP-6601 Limitation of Power to 4th notch with Failure of Dust Exhauster BreakersFailure of dust exhauster motors clog the filters and Quantity of inlet air is reduced Hence the power is limited to 4th notch along with a warning message if the notch above 4th notch
2 Limitation of Power to 4th notch with Failure of RBB or Diode HOTFailure of RBB result in no cooling to power rectifier Similarly if amount of cooling to Rectifier diodes is less due to ay reasons the diodes become HOT In order to safeguard the power rectifier the engine power is restricted to 4th notch
3 Cold Engine based loadingSoon after cranking the engine speed is restricted based on the lube oil temperature till the lube oil temperature is raised up to 60 degcent To improve lubrication
4 Power De-ration from T3 setting to T4 setting (90 to 95 degCent)The engine power is de-rated by 20 of the notch power for every degree raise from 90 deg Onwards
5 8th notch RPM at hottest TemperatureWhen the Engine temperature reached to T4 setting (95 Deg Cen) Engine RPM is raised to 8th notch automatically by cutting of power for faster cooling of engine
6LOW IDLE FEATURE
When the locomotive is in IDLE for more than 10 minutes the engine RPM is reduced to 350 by energising AV and DV for reducing the fuel oil consumption This is posssible only with governors having this option
7Built in Auto switching ON Flasher lights with Simplified circuit
8Self Load box Testing
9Ambient temperature based battery charging
10Event recorder
11Prelubrication
12MULTI RESET VIGILANCE CONTROL DEVICE One VCD reset push button is provided on the control desk near Master handle
MULTI RESET VIGILANCE CONTROL DEVICE
WHY VCD
To stop the train If driver is INCAPACITATED An intelligent vigilance control device with multi-reset feature has
been provided to stop the train if the driver is incapacitated
1048714 The device alerts the driver for every 60 seconds before stopping train If the driver is not alert incapacitated VCD applies there by Engine will come to Idle and penalty brakes will be applied and the train stops
1048714 One VCD alerting lamp provided on each control desk near LED indication panel
1048714 One VCD reset push button is provided on the control desk near master handle
VCD disable unit is provided in the Control PanelPenalty brake application Valve is provided in nose compartment
VCD STARTS FUNCTION
Soon after circuit breakers MB1 MB2 MPCB MFPB1 MFPB2 MCB1 ampMCB2 are switched ON and BCP is less than 21 Kg Sqcm
VCD DOES NOT FUNCTION
If BCP is more than 21 KgSqcm and Loco speed is zero
What VCD do before Penalty BrakesVCD alerts the driver once in every 60 seconds through a Blinking LEDif none of the following activities are performed with in 60 sec1048714 Increase Decrease notch1048708 Application Release of A91048708 Application release of DB1048708 Change of DB level1048708 Operation of GF switches1048708 Change of RH position1048708 Operation of Horn buttons1048708 Operation of Sander buttons1048708 Pressing of VCD reset button
What Driver has to doPerform any of the following loco operations as required or Press VCDRESET button to suppress warning lamp
What if Driver does not respond to VCD warnings
1048708 The Blinking LED continues for 17 seconds1048708 After 17 seconds a buzzer is switched ON along with Blinking LED1048708 A message lsquo 2019 - VCD time out Press VCD reset switchrsquo is displayed on the screen1048708 The blinking LED and buzzer continues for another 17 seconds
What if Driver does not respond up to 94 seconds
The MEP-660 assumes that the driver is dead incapacitated and appliesPenalty Brakes after 94 (60+17+17) seconds and the following changes takesplace in the locomotive1 A message lsquo2301 - VCD Applied Penalty Brakesrsquo will be displayed on the Display Panel2 VCD counter is increased by 13 Buzzer is switched OFF4 LED continue to blink for another 35sec5 BP is reduced to 28 KgSqcm6 Loco Formation brakes are applied7 Engine speed is brought to IDLE8 GF power contactor is dropped out9 Power contactors are dropped out after Master handle brought to IDLE
FOR RELEASING THE PENALTY BRAKES
1 Bring the Throttle to IDLE2 Wait till the blinking LED is OFF3 Wait till the Loco speed is reduced to zero4 Press VCD RESET button
WHILE WAITING FOR SIGNAL IN THE YARD
Apply loco brakes with SA9 to suppress VCD function Ensure BCP is morethan 21 kgSqcm
NOTEbull Always press lsquoVCD resetrsquo switch whenever lsquoVCD LEDrsquo is blinkingbull Donrsquot forget to apply loco brakes while loco is in stand
THE microP LOCOMOTIVE IS WORKING AS REAR LOCOMOTIVE IN MU OPERATION
1 While the locomotive is working as rear loco in MU operation the VCD is not required2 The circuit breakers MCB1 and MCB2 which are available on control desks of Rear Loco should be switched off after making MU set up3 The VCD function is automatically isolated in rear loco and the display shows lsquoVCD in MUrsquo message in the 4th line indicating the status of the VCD4 otherwise ndash What happens 5 Rear loco does not respond to lead loco signalsVCD counterAn incrementing counter by name lsquoVCD Counterrsquo is added in the displayscreen This parameter is visible only when the loco is in idle position Thecount is incremented by one as and when the VCD applies penalty brakeindicating that the driver is not alert
NOTE Please note the reading of this lsquoVCD Counterrsquo on the display unit andrecord the same in the driverrsquos logbook while taking over charge of thelocomotive
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
VCD Isolation switch
RELAYSGR1amp2 Cut out switch
ADBS4 Nos
CONTROL UNIT
MICRO PROCESSOR FRONT PANNEL
MICRO PROCESSOR CONTROL UNIT
bullThis is the main control equipment in the Microprocessor control system
bullThis is located at the Front panel in the place of ECP
bullThe total control system is functionally divided into different modules
bullThese modules are dustproof amp plug in type cards for easy replacement
bullThe connectors of these modules are unique They can not be inserted at wrong place
bullIt is having 19 cards
MEDHA MICRO PROCESSOR DISPLAY UNIT
It is provided at left side of ECS switch on the control panel Display unit is the main interface between the user and the equipment It displays group wise parameters of the locomotive as selected by driver user It displays fault messages Digital inputs and outputs can be tested through the unit
Main MenuMain Menu
2) Display Mode
4) Exit
1) Faults
3) Test Mode
Faults - Submenu
1 View Faults2 Clear Faults
2121
View Faults - SubmenuView Faults - SubmenuThe registered Faults at run time will be displayed The registered Faults at run time will be displayed
User can navigate through the faults using down User can navigate through the faults using down arrow till the following message is displayedarrow till the following message is displayed
lsquoNo More Faults Press Menu Key to exitrsquo
MENU
Clear Faults - SubmenuClear Faults - Submenu
The registered Faults at run time will be displayed User can navigate through the faults using down arrow key and clear the faults by pressing lsquo0rsquo key Till the following message is displayed
Use lsquo0rsquo key to Clear
Depending upon the level of the fault the display prompts pass code for some faults to clear them After entering the valid pass code the fault can be cleared
No More Faults Press Menu Key to exit
MENU
Display Mode SubmenuDisplay Mode Submenu
1 Excitation
2 Auxiliary
3 Wheel Slip
4 Mixed
MENU
5 Driver Display6 MCBG status
7 Collective Data8 Digital inputs
MENU
Display Mode SubmenuDisplay Mode Submenu
9 Digital Outputs10 HP status
MENU
Test ModeTest Mode
NOT APPLICABLE TO LOCO PILOTS
DRIVER DISPLAY
The Driver default display has got three screens
1 IDLE Screen2 Motoring Screen3 Braking Screen
Respective screens are changed automatically based on the control stand signals while the locomotive operation is being set by the Driver
In each screen relative parameters are displayed as shown below
ADB(Analog distribution box)
There are 4 Analog Distribution BoxesThese are located at Front panel in the place of VRPTRP
Each ADB Unit generates isolated low voltage source required for the sensors connected to it from the locomotive control voltage of 72V
Each ADB can handle 8 analog inputs from various sensors and transmit them to the Control unit
RDB(RPM Distribution box)
bullRPM Distribution Unit is similar to the Analog Distribution Unit but handles RPM signals
bullThis is located at Front panel in the place of VRPTRP
bullAll the six traction motor RPM sensors are connected to this RDB
ADDITIONAL FEATURES WITH MEP-6601 Limitation of Power to 4th notch with Failure of Dust Exhauster BreakersFailure of dust exhauster motors clog the filters and Quantity of inlet air is reduced Hence the power is limited to 4th notch along with a warning message if the notch above 4th notch
2 Limitation of Power to 4th notch with Failure of RBB or Diode HOTFailure of RBB result in no cooling to power rectifier Similarly if amount of cooling to Rectifier diodes is less due to ay reasons the diodes become HOT In order to safeguard the power rectifier the engine power is restricted to 4th notch
3 Cold Engine based loadingSoon after cranking the engine speed is restricted based on the lube oil temperature till the lube oil temperature is raised up to 60 degcent To improve lubrication
4 Power De-ration from T3 setting to T4 setting (90 to 95 degCent)The engine power is de-rated by 20 of the notch power for every degree raise from 90 deg Onwards
5 8th notch RPM at hottest TemperatureWhen the Engine temperature reached to T4 setting (95 Deg Cen) Engine RPM is raised to 8th notch automatically by cutting of power for faster cooling of engine
6LOW IDLE FEATURE
When the locomotive is in IDLE for more than 10 minutes the engine RPM is reduced to 350 by energising AV and DV for reducing the fuel oil consumption This is posssible only with governors having this option
7Built in Auto switching ON Flasher lights with Simplified circuit
8Self Load box Testing
9Ambient temperature based battery charging
10Event recorder
11Prelubrication
12MULTI RESET VIGILANCE CONTROL DEVICE One VCD reset push button is provided on the control desk near Master handle
MULTI RESET VIGILANCE CONTROL DEVICE
WHY VCD
To stop the train If driver is INCAPACITATED An intelligent vigilance control device with multi-reset feature has
been provided to stop the train if the driver is incapacitated
1048714 The device alerts the driver for every 60 seconds before stopping train If the driver is not alert incapacitated VCD applies there by Engine will come to Idle and penalty brakes will be applied and the train stops
1048714 One VCD alerting lamp provided on each control desk near LED indication panel
1048714 One VCD reset push button is provided on the control desk near master handle
VCD disable unit is provided in the Control PanelPenalty brake application Valve is provided in nose compartment
VCD STARTS FUNCTION
Soon after circuit breakers MB1 MB2 MPCB MFPB1 MFPB2 MCB1 ampMCB2 are switched ON and BCP is less than 21 Kg Sqcm
VCD DOES NOT FUNCTION
If BCP is more than 21 KgSqcm and Loco speed is zero
What VCD do before Penalty BrakesVCD alerts the driver once in every 60 seconds through a Blinking LEDif none of the following activities are performed with in 60 sec1048714 Increase Decrease notch1048708 Application Release of A91048708 Application release of DB1048708 Change of DB level1048708 Operation of GF switches1048708 Change of RH position1048708 Operation of Horn buttons1048708 Operation of Sander buttons1048708 Pressing of VCD reset button
What Driver has to doPerform any of the following loco operations as required or Press VCDRESET button to suppress warning lamp
What if Driver does not respond to VCD warnings
1048708 The Blinking LED continues for 17 seconds1048708 After 17 seconds a buzzer is switched ON along with Blinking LED1048708 A message lsquo 2019 - VCD time out Press VCD reset switchrsquo is displayed on the screen1048708 The blinking LED and buzzer continues for another 17 seconds
What if Driver does not respond up to 94 seconds
The MEP-660 assumes that the driver is dead incapacitated and appliesPenalty Brakes after 94 (60+17+17) seconds and the following changes takesplace in the locomotive1 A message lsquo2301 - VCD Applied Penalty Brakesrsquo will be displayed on the Display Panel2 VCD counter is increased by 13 Buzzer is switched OFF4 LED continue to blink for another 35sec5 BP is reduced to 28 KgSqcm6 Loco Formation brakes are applied7 Engine speed is brought to IDLE8 GF power contactor is dropped out9 Power contactors are dropped out after Master handle brought to IDLE
FOR RELEASING THE PENALTY BRAKES
1 Bring the Throttle to IDLE2 Wait till the blinking LED is OFF3 Wait till the Loco speed is reduced to zero4 Press VCD RESET button
WHILE WAITING FOR SIGNAL IN THE YARD
Apply loco brakes with SA9 to suppress VCD function Ensure BCP is morethan 21 kgSqcm
NOTEbull Always press lsquoVCD resetrsquo switch whenever lsquoVCD LEDrsquo is blinkingbull Donrsquot forget to apply loco brakes while loco is in stand
THE microP LOCOMOTIVE IS WORKING AS REAR LOCOMOTIVE IN MU OPERATION
1 While the locomotive is working as rear loco in MU operation the VCD is not required2 The circuit breakers MCB1 and MCB2 which are available on control desks of Rear Loco should be switched off after making MU set up3 The VCD function is automatically isolated in rear loco and the display shows lsquoVCD in MUrsquo message in the 4th line indicating the status of the VCD4 otherwise ndash What happens 5 Rear loco does not respond to lead loco signalsVCD counterAn incrementing counter by name lsquoVCD Counterrsquo is added in the displayscreen This parameter is visible only when the loco is in idle position Thecount is incremented by one as and when the VCD applies penalty brakeindicating that the driver is not alert
NOTE Please note the reading of this lsquoVCD Counterrsquo on the display unit andrecord the same in the driverrsquos logbook while taking over charge of thelocomotive
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
MICRO PROCESSOR CONTROL UNIT
bullThis is the main control equipment in the Microprocessor control system
bullThis is located at the Front panel in the place of ECP
bullThe total control system is functionally divided into different modules
bullThese modules are dustproof amp plug in type cards for easy replacement
bullThe connectors of these modules are unique They can not be inserted at wrong place
bullIt is having 19 cards
MEDHA MICRO PROCESSOR DISPLAY UNIT
It is provided at left side of ECS switch on the control panel Display unit is the main interface between the user and the equipment It displays group wise parameters of the locomotive as selected by driver user It displays fault messages Digital inputs and outputs can be tested through the unit
Main MenuMain Menu
2) Display Mode
4) Exit
1) Faults
3) Test Mode
Faults - Submenu
1 View Faults2 Clear Faults
2121
View Faults - SubmenuView Faults - SubmenuThe registered Faults at run time will be displayed The registered Faults at run time will be displayed
User can navigate through the faults using down User can navigate through the faults using down arrow till the following message is displayedarrow till the following message is displayed
lsquoNo More Faults Press Menu Key to exitrsquo
MENU
Clear Faults - SubmenuClear Faults - Submenu
The registered Faults at run time will be displayed User can navigate through the faults using down arrow key and clear the faults by pressing lsquo0rsquo key Till the following message is displayed
Use lsquo0rsquo key to Clear
Depending upon the level of the fault the display prompts pass code for some faults to clear them After entering the valid pass code the fault can be cleared
No More Faults Press Menu Key to exit
MENU
Display Mode SubmenuDisplay Mode Submenu
1 Excitation
2 Auxiliary
3 Wheel Slip
4 Mixed
MENU
5 Driver Display6 MCBG status
7 Collective Data8 Digital inputs
MENU
Display Mode SubmenuDisplay Mode Submenu
9 Digital Outputs10 HP status
MENU
Test ModeTest Mode
NOT APPLICABLE TO LOCO PILOTS
DRIVER DISPLAY
The Driver default display has got three screens
1 IDLE Screen2 Motoring Screen3 Braking Screen
Respective screens are changed automatically based on the control stand signals while the locomotive operation is being set by the Driver
In each screen relative parameters are displayed as shown below
ADB(Analog distribution box)
There are 4 Analog Distribution BoxesThese are located at Front panel in the place of VRPTRP
Each ADB Unit generates isolated low voltage source required for the sensors connected to it from the locomotive control voltage of 72V
Each ADB can handle 8 analog inputs from various sensors and transmit them to the Control unit
RDB(RPM Distribution box)
bullRPM Distribution Unit is similar to the Analog Distribution Unit but handles RPM signals
bullThis is located at Front panel in the place of VRPTRP
bullAll the six traction motor RPM sensors are connected to this RDB
ADDITIONAL FEATURES WITH MEP-6601 Limitation of Power to 4th notch with Failure of Dust Exhauster BreakersFailure of dust exhauster motors clog the filters and Quantity of inlet air is reduced Hence the power is limited to 4th notch along with a warning message if the notch above 4th notch
2 Limitation of Power to 4th notch with Failure of RBB or Diode HOTFailure of RBB result in no cooling to power rectifier Similarly if amount of cooling to Rectifier diodes is less due to ay reasons the diodes become HOT In order to safeguard the power rectifier the engine power is restricted to 4th notch
3 Cold Engine based loadingSoon after cranking the engine speed is restricted based on the lube oil temperature till the lube oil temperature is raised up to 60 degcent To improve lubrication
4 Power De-ration from T3 setting to T4 setting (90 to 95 degCent)The engine power is de-rated by 20 of the notch power for every degree raise from 90 deg Onwards
5 8th notch RPM at hottest TemperatureWhen the Engine temperature reached to T4 setting (95 Deg Cen) Engine RPM is raised to 8th notch automatically by cutting of power for faster cooling of engine
6LOW IDLE FEATURE
When the locomotive is in IDLE for more than 10 minutes the engine RPM is reduced to 350 by energising AV and DV for reducing the fuel oil consumption This is posssible only with governors having this option
7Built in Auto switching ON Flasher lights with Simplified circuit
8Self Load box Testing
9Ambient temperature based battery charging
10Event recorder
11Prelubrication
12MULTI RESET VIGILANCE CONTROL DEVICE One VCD reset push button is provided on the control desk near Master handle
MULTI RESET VIGILANCE CONTROL DEVICE
WHY VCD
To stop the train If driver is INCAPACITATED An intelligent vigilance control device with multi-reset feature has
been provided to stop the train if the driver is incapacitated
1048714 The device alerts the driver for every 60 seconds before stopping train If the driver is not alert incapacitated VCD applies there by Engine will come to Idle and penalty brakes will be applied and the train stops
1048714 One VCD alerting lamp provided on each control desk near LED indication panel
1048714 One VCD reset push button is provided on the control desk near master handle
VCD disable unit is provided in the Control PanelPenalty brake application Valve is provided in nose compartment
VCD STARTS FUNCTION
Soon after circuit breakers MB1 MB2 MPCB MFPB1 MFPB2 MCB1 ampMCB2 are switched ON and BCP is less than 21 Kg Sqcm
VCD DOES NOT FUNCTION
If BCP is more than 21 KgSqcm and Loco speed is zero
What VCD do before Penalty BrakesVCD alerts the driver once in every 60 seconds through a Blinking LEDif none of the following activities are performed with in 60 sec1048714 Increase Decrease notch1048708 Application Release of A91048708 Application release of DB1048708 Change of DB level1048708 Operation of GF switches1048708 Change of RH position1048708 Operation of Horn buttons1048708 Operation of Sander buttons1048708 Pressing of VCD reset button
What Driver has to doPerform any of the following loco operations as required or Press VCDRESET button to suppress warning lamp
What if Driver does not respond to VCD warnings
1048708 The Blinking LED continues for 17 seconds1048708 After 17 seconds a buzzer is switched ON along with Blinking LED1048708 A message lsquo 2019 - VCD time out Press VCD reset switchrsquo is displayed on the screen1048708 The blinking LED and buzzer continues for another 17 seconds
What if Driver does not respond up to 94 seconds
The MEP-660 assumes that the driver is dead incapacitated and appliesPenalty Brakes after 94 (60+17+17) seconds and the following changes takesplace in the locomotive1 A message lsquo2301 - VCD Applied Penalty Brakesrsquo will be displayed on the Display Panel2 VCD counter is increased by 13 Buzzer is switched OFF4 LED continue to blink for another 35sec5 BP is reduced to 28 KgSqcm6 Loco Formation brakes are applied7 Engine speed is brought to IDLE8 GF power contactor is dropped out9 Power contactors are dropped out after Master handle brought to IDLE
FOR RELEASING THE PENALTY BRAKES
1 Bring the Throttle to IDLE2 Wait till the blinking LED is OFF3 Wait till the Loco speed is reduced to zero4 Press VCD RESET button
WHILE WAITING FOR SIGNAL IN THE YARD
Apply loco brakes with SA9 to suppress VCD function Ensure BCP is morethan 21 kgSqcm
NOTEbull Always press lsquoVCD resetrsquo switch whenever lsquoVCD LEDrsquo is blinkingbull Donrsquot forget to apply loco brakes while loco is in stand
THE microP LOCOMOTIVE IS WORKING AS REAR LOCOMOTIVE IN MU OPERATION
1 While the locomotive is working as rear loco in MU operation the VCD is not required2 The circuit breakers MCB1 and MCB2 which are available on control desks of Rear Loco should be switched off after making MU set up3 The VCD function is automatically isolated in rear loco and the display shows lsquoVCD in MUrsquo message in the 4th line indicating the status of the VCD4 otherwise ndash What happens 5 Rear loco does not respond to lead loco signalsVCD counterAn incrementing counter by name lsquoVCD Counterrsquo is added in the displayscreen This parameter is visible only when the loco is in idle position Thecount is incremented by one as and when the VCD applies penalty brakeindicating that the driver is not alert
NOTE Please note the reading of this lsquoVCD Counterrsquo on the display unit andrecord the same in the driverrsquos logbook while taking over charge of thelocomotive
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
MEDHA MICRO PROCESSOR DISPLAY UNIT
It is provided at left side of ECS switch on the control panel Display unit is the main interface between the user and the equipment It displays group wise parameters of the locomotive as selected by driver user It displays fault messages Digital inputs and outputs can be tested through the unit
Main MenuMain Menu
2) Display Mode
4) Exit
1) Faults
3) Test Mode
Faults - Submenu
1 View Faults2 Clear Faults
2121
View Faults - SubmenuView Faults - SubmenuThe registered Faults at run time will be displayed The registered Faults at run time will be displayed
User can navigate through the faults using down User can navigate through the faults using down arrow till the following message is displayedarrow till the following message is displayed
lsquoNo More Faults Press Menu Key to exitrsquo
MENU
Clear Faults - SubmenuClear Faults - Submenu
The registered Faults at run time will be displayed User can navigate through the faults using down arrow key and clear the faults by pressing lsquo0rsquo key Till the following message is displayed
Use lsquo0rsquo key to Clear
Depending upon the level of the fault the display prompts pass code for some faults to clear them After entering the valid pass code the fault can be cleared
No More Faults Press Menu Key to exit
MENU
Display Mode SubmenuDisplay Mode Submenu
1 Excitation
2 Auxiliary
3 Wheel Slip
4 Mixed
MENU
5 Driver Display6 MCBG status
7 Collective Data8 Digital inputs
MENU
Display Mode SubmenuDisplay Mode Submenu
9 Digital Outputs10 HP status
MENU
Test ModeTest Mode
NOT APPLICABLE TO LOCO PILOTS
DRIVER DISPLAY
The Driver default display has got three screens
1 IDLE Screen2 Motoring Screen3 Braking Screen
Respective screens are changed automatically based on the control stand signals while the locomotive operation is being set by the Driver
In each screen relative parameters are displayed as shown below
ADB(Analog distribution box)
There are 4 Analog Distribution BoxesThese are located at Front panel in the place of VRPTRP
Each ADB Unit generates isolated low voltage source required for the sensors connected to it from the locomotive control voltage of 72V
Each ADB can handle 8 analog inputs from various sensors and transmit them to the Control unit
RDB(RPM Distribution box)
bullRPM Distribution Unit is similar to the Analog Distribution Unit but handles RPM signals
bullThis is located at Front panel in the place of VRPTRP
bullAll the six traction motor RPM sensors are connected to this RDB
ADDITIONAL FEATURES WITH MEP-6601 Limitation of Power to 4th notch with Failure of Dust Exhauster BreakersFailure of dust exhauster motors clog the filters and Quantity of inlet air is reduced Hence the power is limited to 4th notch along with a warning message if the notch above 4th notch
2 Limitation of Power to 4th notch with Failure of RBB or Diode HOTFailure of RBB result in no cooling to power rectifier Similarly if amount of cooling to Rectifier diodes is less due to ay reasons the diodes become HOT In order to safeguard the power rectifier the engine power is restricted to 4th notch
3 Cold Engine based loadingSoon after cranking the engine speed is restricted based on the lube oil temperature till the lube oil temperature is raised up to 60 degcent To improve lubrication
4 Power De-ration from T3 setting to T4 setting (90 to 95 degCent)The engine power is de-rated by 20 of the notch power for every degree raise from 90 deg Onwards
5 8th notch RPM at hottest TemperatureWhen the Engine temperature reached to T4 setting (95 Deg Cen) Engine RPM is raised to 8th notch automatically by cutting of power for faster cooling of engine
6LOW IDLE FEATURE
When the locomotive is in IDLE for more than 10 minutes the engine RPM is reduced to 350 by energising AV and DV for reducing the fuel oil consumption This is posssible only with governors having this option
7Built in Auto switching ON Flasher lights with Simplified circuit
8Self Load box Testing
9Ambient temperature based battery charging
10Event recorder
11Prelubrication
12MULTI RESET VIGILANCE CONTROL DEVICE One VCD reset push button is provided on the control desk near Master handle
MULTI RESET VIGILANCE CONTROL DEVICE
WHY VCD
To stop the train If driver is INCAPACITATED An intelligent vigilance control device with multi-reset feature has
been provided to stop the train if the driver is incapacitated
1048714 The device alerts the driver for every 60 seconds before stopping train If the driver is not alert incapacitated VCD applies there by Engine will come to Idle and penalty brakes will be applied and the train stops
1048714 One VCD alerting lamp provided on each control desk near LED indication panel
1048714 One VCD reset push button is provided on the control desk near master handle
VCD disable unit is provided in the Control PanelPenalty brake application Valve is provided in nose compartment
VCD STARTS FUNCTION
Soon after circuit breakers MB1 MB2 MPCB MFPB1 MFPB2 MCB1 ampMCB2 are switched ON and BCP is less than 21 Kg Sqcm
VCD DOES NOT FUNCTION
If BCP is more than 21 KgSqcm and Loco speed is zero
What VCD do before Penalty BrakesVCD alerts the driver once in every 60 seconds through a Blinking LEDif none of the following activities are performed with in 60 sec1048714 Increase Decrease notch1048708 Application Release of A91048708 Application release of DB1048708 Change of DB level1048708 Operation of GF switches1048708 Change of RH position1048708 Operation of Horn buttons1048708 Operation of Sander buttons1048708 Pressing of VCD reset button
What Driver has to doPerform any of the following loco operations as required or Press VCDRESET button to suppress warning lamp
What if Driver does not respond to VCD warnings
1048708 The Blinking LED continues for 17 seconds1048708 After 17 seconds a buzzer is switched ON along with Blinking LED1048708 A message lsquo 2019 - VCD time out Press VCD reset switchrsquo is displayed on the screen1048708 The blinking LED and buzzer continues for another 17 seconds
What if Driver does not respond up to 94 seconds
The MEP-660 assumes that the driver is dead incapacitated and appliesPenalty Brakes after 94 (60+17+17) seconds and the following changes takesplace in the locomotive1 A message lsquo2301 - VCD Applied Penalty Brakesrsquo will be displayed on the Display Panel2 VCD counter is increased by 13 Buzzer is switched OFF4 LED continue to blink for another 35sec5 BP is reduced to 28 KgSqcm6 Loco Formation brakes are applied7 Engine speed is brought to IDLE8 GF power contactor is dropped out9 Power contactors are dropped out after Master handle brought to IDLE
FOR RELEASING THE PENALTY BRAKES
1 Bring the Throttle to IDLE2 Wait till the blinking LED is OFF3 Wait till the Loco speed is reduced to zero4 Press VCD RESET button
WHILE WAITING FOR SIGNAL IN THE YARD
Apply loco brakes with SA9 to suppress VCD function Ensure BCP is morethan 21 kgSqcm
NOTEbull Always press lsquoVCD resetrsquo switch whenever lsquoVCD LEDrsquo is blinkingbull Donrsquot forget to apply loco brakes while loco is in stand
THE microP LOCOMOTIVE IS WORKING AS REAR LOCOMOTIVE IN MU OPERATION
1 While the locomotive is working as rear loco in MU operation the VCD is not required2 The circuit breakers MCB1 and MCB2 which are available on control desks of Rear Loco should be switched off after making MU set up3 The VCD function is automatically isolated in rear loco and the display shows lsquoVCD in MUrsquo message in the 4th line indicating the status of the VCD4 otherwise ndash What happens 5 Rear loco does not respond to lead loco signalsVCD counterAn incrementing counter by name lsquoVCD Counterrsquo is added in the displayscreen This parameter is visible only when the loco is in idle position Thecount is incremented by one as and when the VCD applies penalty brakeindicating that the driver is not alert
NOTE Please note the reading of this lsquoVCD Counterrsquo on the display unit andrecord the same in the driverrsquos logbook while taking over charge of thelocomotive
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
Main MenuMain Menu
2) Display Mode
4) Exit
1) Faults
3) Test Mode
Faults - Submenu
1 View Faults2 Clear Faults
2121
View Faults - SubmenuView Faults - SubmenuThe registered Faults at run time will be displayed The registered Faults at run time will be displayed
User can navigate through the faults using down User can navigate through the faults using down arrow till the following message is displayedarrow till the following message is displayed
lsquoNo More Faults Press Menu Key to exitrsquo
MENU
Clear Faults - SubmenuClear Faults - Submenu
The registered Faults at run time will be displayed User can navigate through the faults using down arrow key and clear the faults by pressing lsquo0rsquo key Till the following message is displayed
Use lsquo0rsquo key to Clear
Depending upon the level of the fault the display prompts pass code for some faults to clear them After entering the valid pass code the fault can be cleared
No More Faults Press Menu Key to exit
MENU
Display Mode SubmenuDisplay Mode Submenu
1 Excitation
2 Auxiliary
3 Wheel Slip
4 Mixed
MENU
5 Driver Display6 MCBG status
7 Collective Data8 Digital inputs
MENU
Display Mode SubmenuDisplay Mode Submenu
9 Digital Outputs10 HP status
MENU
Test ModeTest Mode
NOT APPLICABLE TO LOCO PILOTS
DRIVER DISPLAY
The Driver default display has got three screens
1 IDLE Screen2 Motoring Screen3 Braking Screen
Respective screens are changed automatically based on the control stand signals while the locomotive operation is being set by the Driver
In each screen relative parameters are displayed as shown below
ADB(Analog distribution box)
There are 4 Analog Distribution BoxesThese are located at Front panel in the place of VRPTRP
Each ADB Unit generates isolated low voltage source required for the sensors connected to it from the locomotive control voltage of 72V
Each ADB can handle 8 analog inputs from various sensors and transmit them to the Control unit
RDB(RPM Distribution box)
bullRPM Distribution Unit is similar to the Analog Distribution Unit but handles RPM signals
bullThis is located at Front panel in the place of VRPTRP
bullAll the six traction motor RPM sensors are connected to this RDB
ADDITIONAL FEATURES WITH MEP-6601 Limitation of Power to 4th notch with Failure of Dust Exhauster BreakersFailure of dust exhauster motors clog the filters and Quantity of inlet air is reduced Hence the power is limited to 4th notch along with a warning message if the notch above 4th notch
2 Limitation of Power to 4th notch with Failure of RBB or Diode HOTFailure of RBB result in no cooling to power rectifier Similarly if amount of cooling to Rectifier diodes is less due to ay reasons the diodes become HOT In order to safeguard the power rectifier the engine power is restricted to 4th notch
3 Cold Engine based loadingSoon after cranking the engine speed is restricted based on the lube oil temperature till the lube oil temperature is raised up to 60 degcent To improve lubrication
4 Power De-ration from T3 setting to T4 setting (90 to 95 degCent)The engine power is de-rated by 20 of the notch power for every degree raise from 90 deg Onwards
5 8th notch RPM at hottest TemperatureWhen the Engine temperature reached to T4 setting (95 Deg Cen) Engine RPM is raised to 8th notch automatically by cutting of power for faster cooling of engine
6LOW IDLE FEATURE
When the locomotive is in IDLE for more than 10 minutes the engine RPM is reduced to 350 by energising AV and DV for reducing the fuel oil consumption This is posssible only with governors having this option
7Built in Auto switching ON Flasher lights with Simplified circuit
8Self Load box Testing
9Ambient temperature based battery charging
10Event recorder
11Prelubrication
12MULTI RESET VIGILANCE CONTROL DEVICE One VCD reset push button is provided on the control desk near Master handle
MULTI RESET VIGILANCE CONTROL DEVICE
WHY VCD
To stop the train If driver is INCAPACITATED An intelligent vigilance control device with multi-reset feature has
been provided to stop the train if the driver is incapacitated
1048714 The device alerts the driver for every 60 seconds before stopping train If the driver is not alert incapacitated VCD applies there by Engine will come to Idle and penalty brakes will be applied and the train stops
1048714 One VCD alerting lamp provided on each control desk near LED indication panel
1048714 One VCD reset push button is provided on the control desk near master handle
VCD disable unit is provided in the Control PanelPenalty brake application Valve is provided in nose compartment
VCD STARTS FUNCTION
Soon after circuit breakers MB1 MB2 MPCB MFPB1 MFPB2 MCB1 ampMCB2 are switched ON and BCP is less than 21 Kg Sqcm
VCD DOES NOT FUNCTION
If BCP is more than 21 KgSqcm and Loco speed is zero
What VCD do before Penalty BrakesVCD alerts the driver once in every 60 seconds through a Blinking LEDif none of the following activities are performed with in 60 sec1048714 Increase Decrease notch1048708 Application Release of A91048708 Application release of DB1048708 Change of DB level1048708 Operation of GF switches1048708 Change of RH position1048708 Operation of Horn buttons1048708 Operation of Sander buttons1048708 Pressing of VCD reset button
What Driver has to doPerform any of the following loco operations as required or Press VCDRESET button to suppress warning lamp
What if Driver does not respond to VCD warnings
1048708 The Blinking LED continues for 17 seconds1048708 After 17 seconds a buzzer is switched ON along with Blinking LED1048708 A message lsquo 2019 - VCD time out Press VCD reset switchrsquo is displayed on the screen1048708 The blinking LED and buzzer continues for another 17 seconds
What if Driver does not respond up to 94 seconds
The MEP-660 assumes that the driver is dead incapacitated and appliesPenalty Brakes after 94 (60+17+17) seconds and the following changes takesplace in the locomotive1 A message lsquo2301 - VCD Applied Penalty Brakesrsquo will be displayed on the Display Panel2 VCD counter is increased by 13 Buzzer is switched OFF4 LED continue to blink for another 35sec5 BP is reduced to 28 KgSqcm6 Loco Formation brakes are applied7 Engine speed is brought to IDLE8 GF power contactor is dropped out9 Power contactors are dropped out after Master handle brought to IDLE
FOR RELEASING THE PENALTY BRAKES
1 Bring the Throttle to IDLE2 Wait till the blinking LED is OFF3 Wait till the Loco speed is reduced to zero4 Press VCD RESET button
WHILE WAITING FOR SIGNAL IN THE YARD
Apply loco brakes with SA9 to suppress VCD function Ensure BCP is morethan 21 kgSqcm
NOTEbull Always press lsquoVCD resetrsquo switch whenever lsquoVCD LEDrsquo is blinkingbull Donrsquot forget to apply loco brakes while loco is in stand
THE microP LOCOMOTIVE IS WORKING AS REAR LOCOMOTIVE IN MU OPERATION
1 While the locomotive is working as rear loco in MU operation the VCD is not required2 The circuit breakers MCB1 and MCB2 which are available on control desks of Rear Loco should be switched off after making MU set up3 The VCD function is automatically isolated in rear loco and the display shows lsquoVCD in MUrsquo message in the 4th line indicating the status of the VCD4 otherwise ndash What happens 5 Rear loco does not respond to lead loco signalsVCD counterAn incrementing counter by name lsquoVCD Counterrsquo is added in the displayscreen This parameter is visible only when the loco is in idle position Thecount is incremented by one as and when the VCD applies penalty brakeindicating that the driver is not alert
NOTE Please note the reading of this lsquoVCD Counterrsquo on the display unit andrecord the same in the driverrsquos logbook while taking over charge of thelocomotive
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
2121
View Faults - SubmenuView Faults - SubmenuThe registered Faults at run time will be displayed The registered Faults at run time will be displayed
User can navigate through the faults using down User can navigate through the faults using down arrow till the following message is displayedarrow till the following message is displayed
lsquoNo More Faults Press Menu Key to exitrsquo
MENU
Clear Faults - SubmenuClear Faults - Submenu
The registered Faults at run time will be displayed User can navigate through the faults using down arrow key and clear the faults by pressing lsquo0rsquo key Till the following message is displayed
Use lsquo0rsquo key to Clear
Depending upon the level of the fault the display prompts pass code for some faults to clear them After entering the valid pass code the fault can be cleared
No More Faults Press Menu Key to exit
MENU
Display Mode SubmenuDisplay Mode Submenu
1 Excitation
2 Auxiliary
3 Wheel Slip
4 Mixed
MENU
5 Driver Display6 MCBG status
7 Collective Data8 Digital inputs
MENU
Display Mode SubmenuDisplay Mode Submenu
9 Digital Outputs10 HP status
MENU
Test ModeTest Mode
NOT APPLICABLE TO LOCO PILOTS
DRIVER DISPLAY
The Driver default display has got three screens
1 IDLE Screen2 Motoring Screen3 Braking Screen
Respective screens are changed automatically based on the control stand signals while the locomotive operation is being set by the Driver
In each screen relative parameters are displayed as shown below
ADB(Analog distribution box)
There are 4 Analog Distribution BoxesThese are located at Front panel in the place of VRPTRP
Each ADB Unit generates isolated low voltage source required for the sensors connected to it from the locomotive control voltage of 72V
Each ADB can handle 8 analog inputs from various sensors and transmit them to the Control unit
RDB(RPM Distribution box)
bullRPM Distribution Unit is similar to the Analog Distribution Unit but handles RPM signals
bullThis is located at Front panel in the place of VRPTRP
bullAll the six traction motor RPM sensors are connected to this RDB
ADDITIONAL FEATURES WITH MEP-6601 Limitation of Power to 4th notch with Failure of Dust Exhauster BreakersFailure of dust exhauster motors clog the filters and Quantity of inlet air is reduced Hence the power is limited to 4th notch along with a warning message if the notch above 4th notch
2 Limitation of Power to 4th notch with Failure of RBB or Diode HOTFailure of RBB result in no cooling to power rectifier Similarly if amount of cooling to Rectifier diodes is less due to ay reasons the diodes become HOT In order to safeguard the power rectifier the engine power is restricted to 4th notch
3 Cold Engine based loadingSoon after cranking the engine speed is restricted based on the lube oil temperature till the lube oil temperature is raised up to 60 degcent To improve lubrication
4 Power De-ration from T3 setting to T4 setting (90 to 95 degCent)The engine power is de-rated by 20 of the notch power for every degree raise from 90 deg Onwards
5 8th notch RPM at hottest TemperatureWhen the Engine temperature reached to T4 setting (95 Deg Cen) Engine RPM is raised to 8th notch automatically by cutting of power for faster cooling of engine
6LOW IDLE FEATURE
When the locomotive is in IDLE for more than 10 minutes the engine RPM is reduced to 350 by energising AV and DV for reducing the fuel oil consumption This is posssible only with governors having this option
7Built in Auto switching ON Flasher lights with Simplified circuit
8Self Load box Testing
9Ambient temperature based battery charging
10Event recorder
11Prelubrication
12MULTI RESET VIGILANCE CONTROL DEVICE One VCD reset push button is provided on the control desk near Master handle
MULTI RESET VIGILANCE CONTROL DEVICE
WHY VCD
To stop the train If driver is INCAPACITATED An intelligent vigilance control device with multi-reset feature has
been provided to stop the train if the driver is incapacitated
1048714 The device alerts the driver for every 60 seconds before stopping train If the driver is not alert incapacitated VCD applies there by Engine will come to Idle and penalty brakes will be applied and the train stops
1048714 One VCD alerting lamp provided on each control desk near LED indication panel
1048714 One VCD reset push button is provided on the control desk near master handle
VCD disable unit is provided in the Control PanelPenalty brake application Valve is provided in nose compartment
VCD STARTS FUNCTION
Soon after circuit breakers MB1 MB2 MPCB MFPB1 MFPB2 MCB1 ampMCB2 are switched ON and BCP is less than 21 Kg Sqcm
VCD DOES NOT FUNCTION
If BCP is more than 21 KgSqcm and Loco speed is zero
What VCD do before Penalty BrakesVCD alerts the driver once in every 60 seconds through a Blinking LEDif none of the following activities are performed with in 60 sec1048714 Increase Decrease notch1048708 Application Release of A91048708 Application release of DB1048708 Change of DB level1048708 Operation of GF switches1048708 Change of RH position1048708 Operation of Horn buttons1048708 Operation of Sander buttons1048708 Pressing of VCD reset button
What Driver has to doPerform any of the following loco operations as required or Press VCDRESET button to suppress warning lamp
What if Driver does not respond to VCD warnings
1048708 The Blinking LED continues for 17 seconds1048708 After 17 seconds a buzzer is switched ON along with Blinking LED1048708 A message lsquo 2019 - VCD time out Press VCD reset switchrsquo is displayed on the screen1048708 The blinking LED and buzzer continues for another 17 seconds
What if Driver does not respond up to 94 seconds
The MEP-660 assumes that the driver is dead incapacitated and appliesPenalty Brakes after 94 (60+17+17) seconds and the following changes takesplace in the locomotive1 A message lsquo2301 - VCD Applied Penalty Brakesrsquo will be displayed on the Display Panel2 VCD counter is increased by 13 Buzzer is switched OFF4 LED continue to blink for another 35sec5 BP is reduced to 28 KgSqcm6 Loco Formation brakes are applied7 Engine speed is brought to IDLE8 GF power contactor is dropped out9 Power contactors are dropped out after Master handle brought to IDLE
FOR RELEASING THE PENALTY BRAKES
1 Bring the Throttle to IDLE2 Wait till the blinking LED is OFF3 Wait till the Loco speed is reduced to zero4 Press VCD RESET button
WHILE WAITING FOR SIGNAL IN THE YARD
Apply loco brakes with SA9 to suppress VCD function Ensure BCP is morethan 21 kgSqcm
NOTEbull Always press lsquoVCD resetrsquo switch whenever lsquoVCD LEDrsquo is blinkingbull Donrsquot forget to apply loco brakes while loco is in stand
THE microP LOCOMOTIVE IS WORKING AS REAR LOCOMOTIVE IN MU OPERATION
1 While the locomotive is working as rear loco in MU operation the VCD is not required2 The circuit breakers MCB1 and MCB2 which are available on control desks of Rear Loco should be switched off after making MU set up3 The VCD function is automatically isolated in rear loco and the display shows lsquoVCD in MUrsquo message in the 4th line indicating the status of the VCD4 otherwise ndash What happens 5 Rear loco does not respond to lead loco signalsVCD counterAn incrementing counter by name lsquoVCD Counterrsquo is added in the displayscreen This parameter is visible only when the loco is in idle position Thecount is incremented by one as and when the VCD applies penalty brakeindicating that the driver is not alert
NOTE Please note the reading of this lsquoVCD Counterrsquo on the display unit andrecord the same in the driverrsquos logbook while taking over charge of thelocomotive
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
Clear Faults - SubmenuClear Faults - Submenu
The registered Faults at run time will be displayed User can navigate through the faults using down arrow key and clear the faults by pressing lsquo0rsquo key Till the following message is displayed
Use lsquo0rsquo key to Clear
Depending upon the level of the fault the display prompts pass code for some faults to clear them After entering the valid pass code the fault can be cleared
No More Faults Press Menu Key to exit
MENU
Display Mode SubmenuDisplay Mode Submenu
1 Excitation
2 Auxiliary
3 Wheel Slip
4 Mixed
MENU
5 Driver Display6 MCBG status
7 Collective Data8 Digital inputs
MENU
Display Mode SubmenuDisplay Mode Submenu
9 Digital Outputs10 HP status
MENU
Test ModeTest Mode
NOT APPLICABLE TO LOCO PILOTS
DRIVER DISPLAY
The Driver default display has got three screens
1 IDLE Screen2 Motoring Screen3 Braking Screen
Respective screens are changed automatically based on the control stand signals while the locomotive operation is being set by the Driver
In each screen relative parameters are displayed as shown below
ADB(Analog distribution box)
There are 4 Analog Distribution BoxesThese are located at Front panel in the place of VRPTRP
Each ADB Unit generates isolated low voltage source required for the sensors connected to it from the locomotive control voltage of 72V
Each ADB can handle 8 analog inputs from various sensors and transmit them to the Control unit
RDB(RPM Distribution box)
bullRPM Distribution Unit is similar to the Analog Distribution Unit but handles RPM signals
bullThis is located at Front panel in the place of VRPTRP
bullAll the six traction motor RPM sensors are connected to this RDB
ADDITIONAL FEATURES WITH MEP-6601 Limitation of Power to 4th notch with Failure of Dust Exhauster BreakersFailure of dust exhauster motors clog the filters and Quantity of inlet air is reduced Hence the power is limited to 4th notch along with a warning message if the notch above 4th notch
2 Limitation of Power to 4th notch with Failure of RBB or Diode HOTFailure of RBB result in no cooling to power rectifier Similarly if amount of cooling to Rectifier diodes is less due to ay reasons the diodes become HOT In order to safeguard the power rectifier the engine power is restricted to 4th notch
3 Cold Engine based loadingSoon after cranking the engine speed is restricted based on the lube oil temperature till the lube oil temperature is raised up to 60 degcent To improve lubrication
4 Power De-ration from T3 setting to T4 setting (90 to 95 degCent)The engine power is de-rated by 20 of the notch power for every degree raise from 90 deg Onwards
5 8th notch RPM at hottest TemperatureWhen the Engine temperature reached to T4 setting (95 Deg Cen) Engine RPM is raised to 8th notch automatically by cutting of power for faster cooling of engine
6LOW IDLE FEATURE
When the locomotive is in IDLE for more than 10 minutes the engine RPM is reduced to 350 by energising AV and DV for reducing the fuel oil consumption This is posssible only with governors having this option
7Built in Auto switching ON Flasher lights with Simplified circuit
8Self Load box Testing
9Ambient temperature based battery charging
10Event recorder
11Prelubrication
12MULTI RESET VIGILANCE CONTROL DEVICE One VCD reset push button is provided on the control desk near Master handle
MULTI RESET VIGILANCE CONTROL DEVICE
WHY VCD
To stop the train If driver is INCAPACITATED An intelligent vigilance control device with multi-reset feature has
been provided to stop the train if the driver is incapacitated
1048714 The device alerts the driver for every 60 seconds before stopping train If the driver is not alert incapacitated VCD applies there by Engine will come to Idle and penalty brakes will be applied and the train stops
1048714 One VCD alerting lamp provided on each control desk near LED indication panel
1048714 One VCD reset push button is provided on the control desk near master handle
VCD disable unit is provided in the Control PanelPenalty brake application Valve is provided in nose compartment
VCD STARTS FUNCTION
Soon after circuit breakers MB1 MB2 MPCB MFPB1 MFPB2 MCB1 ampMCB2 are switched ON and BCP is less than 21 Kg Sqcm
VCD DOES NOT FUNCTION
If BCP is more than 21 KgSqcm and Loco speed is zero
What VCD do before Penalty BrakesVCD alerts the driver once in every 60 seconds through a Blinking LEDif none of the following activities are performed with in 60 sec1048714 Increase Decrease notch1048708 Application Release of A91048708 Application release of DB1048708 Change of DB level1048708 Operation of GF switches1048708 Change of RH position1048708 Operation of Horn buttons1048708 Operation of Sander buttons1048708 Pressing of VCD reset button
What Driver has to doPerform any of the following loco operations as required or Press VCDRESET button to suppress warning lamp
What if Driver does not respond to VCD warnings
1048708 The Blinking LED continues for 17 seconds1048708 After 17 seconds a buzzer is switched ON along with Blinking LED1048708 A message lsquo 2019 - VCD time out Press VCD reset switchrsquo is displayed on the screen1048708 The blinking LED and buzzer continues for another 17 seconds
What if Driver does not respond up to 94 seconds
The MEP-660 assumes that the driver is dead incapacitated and appliesPenalty Brakes after 94 (60+17+17) seconds and the following changes takesplace in the locomotive1 A message lsquo2301 - VCD Applied Penalty Brakesrsquo will be displayed on the Display Panel2 VCD counter is increased by 13 Buzzer is switched OFF4 LED continue to blink for another 35sec5 BP is reduced to 28 KgSqcm6 Loco Formation brakes are applied7 Engine speed is brought to IDLE8 GF power contactor is dropped out9 Power contactors are dropped out after Master handle brought to IDLE
FOR RELEASING THE PENALTY BRAKES
1 Bring the Throttle to IDLE2 Wait till the blinking LED is OFF3 Wait till the Loco speed is reduced to zero4 Press VCD RESET button
WHILE WAITING FOR SIGNAL IN THE YARD
Apply loco brakes with SA9 to suppress VCD function Ensure BCP is morethan 21 kgSqcm
NOTEbull Always press lsquoVCD resetrsquo switch whenever lsquoVCD LEDrsquo is blinkingbull Donrsquot forget to apply loco brakes while loco is in stand
THE microP LOCOMOTIVE IS WORKING AS REAR LOCOMOTIVE IN MU OPERATION
1 While the locomotive is working as rear loco in MU operation the VCD is not required2 The circuit breakers MCB1 and MCB2 which are available on control desks of Rear Loco should be switched off after making MU set up3 The VCD function is automatically isolated in rear loco and the display shows lsquoVCD in MUrsquo message in the 4th line indicating the status of the VCD4 otherwise ndash What happens 5 Rear loco does not respond to lead loco signalsVCD counterAn incrementing counter by name lsquoVCD Counterrsquo is added in the displayscreen This parameter is visible only when the loco is in idle position Thecount is incremented by one as and when the VCD applies penalty brakeindicating that the driver is not alert
NOTE Please note the reading of this lsquoVCD Counterrsquo on the display unit andrecord the same in the driverrsquos logbook while taking over charge of thelocomotive
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
Display Mode SubmenuDisplay Mode Submenu
1 Excitation
2 Auxiliary
3 Wheel Slip
4 Mixed
MENU
5 Driver Display6 MCBG status
7 Collective Data8 Digital inputs
MENU
Display Mode SubmenuDisplay Mode Submenu
9 Digital Outputs10 HP status
MENU
Test ModeTest Mode
NOT APPLICABLE TO LOCO PILOTS
DRIVER DISPLAY
The Driver default display has got three screens
1 IDLE Screen2 Motoring Screen3 Braking Screen
Respective screens are changed automatically based on the control stand signals while the locomotive operation is being set by the Driver
In each screen relative parameters are displayed as shown below
ADB(Analog distribution box)
There are 4 Analog Distribution BoxesThese are located at Front panel in the place of VRPTRP
Each ADB Unit generates isolated low voltage source required for the sensors connected to it from the locomotive control voltage of 72V
Each ADB can handle 8 analog inputs from various sensors and transmit them to the Control unit
RDB(RPM Distribution box)
bullRPM Distribution Unit is similar to the Analog Distribution Unit but handles RPM signals
bullThis is located at Front panel in the place of VRPTRP
bullAll the six traction motor RPM sensors are connected to this RDB
ADDITIONAL FEATURES WITH MEP-6601 Limitation of Power to 4th notch with Failure of Dust Exhauster BreakersFailure of dust exhauster motors clog the filters and Quantity of inlet air is reduced Hence the power is limited to 4th notch along with a warning message if the notch above 4th notch
2 Limitation of Power to 4th notch with Failure of RBB or Diode HOTFailure of RBB result in no cooling to power rectifier Similarly if amount of cooling to Rectifier diodes is less due to ay reasons the diodes become HOT In order to safeguard the power rectifier the engine power is restricted to 4th notch
3 Cold Engine based loadingSoon after cranking the engine speed is restricted based on the lube oil temperature till the lube oil temperature is raised up to 60 degcent To improve lubrication
4 Power De-ration from T3 setting to T4 setting (90 to 95 degCent)The engine power is de-rated by 20 of the notch power for every degree raise from 90 deg Onwards
5 8th notch RPM at hottest TemperatureWhen the Engine temperature reached to T4 setting (95 Deg Cen) Engine RPM is raised to 8th notch automatically by cutting of power for faster cooling of engine
6LOW IDLE FEATURE
When the locomotive is in IDLE for more than 10 minutes the engine RPM is reduced to 350 by energising AV and DV for reducing the fuel oil consumption This is posssible only with governors having this option
7Built in Auto switching ON Flasher lights with Simplified circuit
8Self Load box Testing
9Ambient temperature based battery charging
10Event recorder
11Prelubrication
12MULTI RESET VIGILANCE CONTROL DEVICE One VCD reset push button is provided on the control desk near Master handle
MULTI RESET VIGILANCE CONTROL DEVICE
WHY VCD
To stop the train If driver is INCAPACITATED An intelligent vigilance control device with multi-reset feature has
been provided to stop the train if the driver is incapacitated
1048714 The device alerts the driver for every 60 seconds before stopping train If the driver is not alert incapacitated VCD applies there by Engine will come to Idle and penalty brakes will be applied and the train stops
1048714 One VCD alerting lamp provided on each control desk near LED indication panel
1048714 One VCD reset push button is provided on the control desk near master handle
VCD disable unit is provided in the Control PanelPenalty brake application Valve is provided in nose compartment
VCD STARTS FUNCTION
Soon after circuit breakers MB1 MB2 MPCB MFPB1 MFPB2 MCB1 ampMCB2 are switched ON and BCP is less than 21 Kg Sqcm
VCD DOES NOT FUNCTION
If BCP is more than 21 KgSqcm and Loco speed is zero
What VCD do before Penalty BrakesVCD alerts the driver once in every 60 seconds through a Blinking LEDif none of the following activities are performed with in 60 sec1048714 Increase Decrease notch1048708 Application Release of A91048708 Application release of DB1048708 Change of DB level1048708 Operation of GF switches1048708 Change of RH position1048708 Operation of Horn buttons1048708 Operation of Sander buttons1048708 Pressing of VCD reset button
What Driver has to doPerform any of the following loco operations as required or Press VCDRESET button to suppress warning lamp
What if Driver does not respond to VCD warnings
1048708 The Blinking LED continues for 17 seconds1048708 After 17 seconds a buzzer is switched ON along with Blinking LED1048708 A message lsquo 2019 - VCD time out Press VCD reset switchrsquo is displayed on the screen1048708 The blinking LED and buzzer continues for another 17 seconds
What if Driver does not respond up to 94 seconds
The MEP-660 assumes that the driver is dead incapacitated and appliesPenalty Brakes after 94 (60+17+17) seconds and the following changes takesplace in the locomotive1 A message lsquo2301 - VCD Applied Penalty Brakesrsquo will be displayed on the Display Panel2 VCD counter is increased by 13 Buzzer is switched OFF4 LED continue to blink for another 35sec5 BP is reduced to 28 KgSqcm6 Loco Formation brakes are applied7 Engine speed is brought to IDLE8 GF power contactor is dropped out9 Power contactors are dropped out after Master handle brought to IDLE
FOR RELEASING THE PENALTY BRAKES
1 Bring the Throttle to IDLE2 Wait till the blinking LED is OFF3 Wait till the Loco speed is reduced to zero4 Press VCD RESET button
WHILE WAITING FOR SIGNAL IN THE YARD
Apply loco brakes with SA9 to suppress VCD function Ensure BCP is morethan 21 kgSqcm
NOTEbull Always press lsquoVCD resetrsquo switch whenever lsquoVCD LEDrsquo is blinkingbull Donrsquot forget to apply loco brakes while loco is in stand
THE microP LOCOMOTIVE IS WORKING AS REAR LOCOMOTIVE IN MU OPERATION
1 While the locomotive is working as rear loco in MU operation the VCD is not required2 The circuit breakers MCB1 and MCB2 which are available on control desks of Rear Loco should be switched off after making MU set up3 The VCD function is automatically isolated in rear loco and the display shows lsquoVCD in MUrsquo message in the 4th line indicating the status of the VCD4 otherwise ndash What happens 5 Rear loco does not respond to lead loco signalsVCD counterAn incrementing counter by name lsquoVCD Counterrsquo is added in the displayscreen This parameter is visible only when the loco is in idle position Thecount is incremented by one as and when the VCD applies penalty brakeindicating that the driver is not alert
NOTE Please note the reading of this lsquoVCD Counterrsquo on the display unit andrecord the same in the driverrsquos logbook while taking over charge of thelocomotive
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
Display Mode SubmenuDisplay Mode Submenu
9 Digital Outputs10 HP status
MENU
Test ModeTest Mode
NOT APPLICABLE TO LOCO PILOTS
DRIVER DISPLAY
The Driver default display has got three screens
1 IDLE Screen2 Motoring Screen3 Braking Screen
Respective screens are changed automatically based on the control stand signals while the locomotive operation is being set by the Driver
In each screen relative parameters are displayed as shown below
ADB(Analog distribution box)
There are 4 Analog Distribution BoxesThese are located at Front panel in the place of VRPTRP
Each ADB Unit generates isolated low voltage source required for the sensors connected to it from the locomotive control voltage of 72V
Each ADB can handle 8 analog inputs from various sensors and transmit them to the Control unit
RDB(RPM Distribution box)
bullRPM Distribution Unit is similar to the Analog Distribution Unit but handles RPM signals
bullThis is located at Front panel in the place of VRPTRP
bullAll the six traction motor RPM sensors are connected to this RDB
ADDITIONAL FEATURES WITH MEP-6601 Limitation of Power to 4th notch with Failure of Dust Exhauster BreakersFailure of dust exhauster motors clog the filters and Quantity of inlet air is reduced Hence the power is limited to 4th notch along with a warning message if the notch above 4th notch
2 Limitation of Power to 4th notch with Failure of RBB or Diode HOTFailure of RBB result in no cooling to power rectifier Similarly if amount of cooling to Rectifier diodes is less due to ay reasons the diodes become HOT In order to safeguard the power rectifier the engine power is restricted to 4th notch
3 Cold Engine based loadingSoon after cranking the engine speed is restricted based on the lube oil temperature till the lube oil temperature is raised up to 60 degcent To improve lubrication
4 Power De-ration from T3 setting to T4 setting (90 to 95 degCent)The engine power is de-rated by 20 of the notch power for every degree raise from 90 deg Onwards
5 8th notch RPM at hottest TemperatureWhen the Engine temperature reached to T4 setting (95 Deg Cen) Engine RPM is raised to 8th notch automatically by cutting of power for faster cooling of engine
6LOW IDLE FEATURE
When the locomotive is in IDLE for more than 10 minutes the engine RPM is reduced to 350 by energising AV and DV for reducing the fuel oil consumption This is posssible only with governors having this option
7Built in Auto switching ON Flasher lights with Simplified circuit
8Self Load box Testing
9Ambient temperature based battery charging
10Event recorder
11Prelubrication
12MULTI RESET VIGILANCE CONTROL DEVICE One VCD reset push button is provided on the control desk near Master handle
MULTI RESET VIGILANCE CONTROL DEVICE
WHY VCD
To stop the train If driver is INCAPACITATED An intelligent vigilance control device with multi-reset feature has
been provided to stop the train if the driver is incapacitated
1048714 The device alerts the driver for every 60 seconds before stopping train If the driver is not alert incapacitated VCD applies there by Engine will come to Idle and penalty brakes will be applied and the train stops
1048714 One VCD alerting lamp provided on each control desk near LED indication panel
1048714 One VCD reset push button is provided on the control desk near master handle
VCD disable unit is provided in the Control PanelPenalty brake application Valve is provided in nose compartment
VCD STARTS FUNCTION
Soon after circuit breakers MB1 MB2 MPCB MFPB1 MFPB2 MCB1 ampMCB2 are switched ON and BCP is less than 21 Kg Sqcm
VCD DOES NOT FUNCTION
If BCP is more than 21 KgSqcm and Loco speed is zero
What VCD do before Penalty BrakesVCD alerts the driver once in every 60 seconds through a Blinking LEDif none of the following activities are performed with in 60 sec1048714 Increase Decrease notch1048708 Application Release of A91048708 Application release of DB1048708 Change of DB level1048708 Operation of GF switches1048708 Change of RH position1048708 Operation of Horn buttons1048708 Operation of Sander buttons1048708 Pressing of VCD reset button
What Driver has to doPerform any of the following loco operations as required or Press VCDRESET button to suppress warning lamp
What if Driver does not respond to VCD warnings
1048708 The Blinking LED continues for 17 seconds1048708 After 17 seconds a buzzer is switched ON along with Blinking LED1048708 A message lsquo 2019 - VCD time out Press VCD reset switchrsquo is displayed on the screen1048708 The blinking LED and buzzer continues for another 17 seconds
What if Driver does not respond up to 94 seconds
The MEP-660 assumes that the driver is dead incapacitated and appliesPenalty Brakes after 94 (60+17+17) seconds and the following changes takesplace in the locomotive1 A message lsquo2301 - VCD Applied Penalty Brakesrsquo will be displayed on the Display Panel2 VCD counter is increased by 13 Buzzer is switched OFF4 LED continue to blink for another 35sec5 BP is reduced to 28 KgSqcm6 Loco Formation brakes are applied7 Engine speed is brought to IDLE8 GF power contactor is dropped out9 Power contactors are dropped out after Master handle brought to IDLE
FOR RELEASING THE PENALTY BRAKES
1 Bring the Throttle to IDLE2 Wait till the blinking LED is OFF3 Wait till the Loco speed is reduced to zero4 Press VCD RESET button
WHILE WAITING FOR SIGNAL IN THE YARD
Apply loco brakes with SA9 to suppress VCD function Ensure BCP is morethan 21 kgSqcm
NOTEbull Always press lsquoVCD resetrsquo switch whenever lsquoVCD LEDrsquo is blinkingbull Donrsquot forget to apply loco brakes while loco is in stand
THE microP LOCOMOTIVE IS WORKING AS REAR LOCOMOTIVE IN MU OPERATION
1 While the locomotive is working as rear loco in MU operation the VCD is not required2 The circuit breakers MCB1 and MCB2 which are available on control desks of Rear Loco should be switched off after making MU set up3 The VCD function is automatically isolated in rear loco and the display shows lsquoVCD in MUrsquo message in the 4th line indicating the status of the VCD4 otherwise ndash What happens 5 Rear loco does not respond to lead loco signalsVCD counterAn incrementing counter by name lsquoVCD Counterrsquo is added in the displayscreen This parameter is visible only when the loco is in idle position Thecount is incremented by one as and when the VCD applies penalty brakeindicating that the driver is not alert
NOTE Please note the reading of this lsquoVCD Counterrsquo on the display unit andrecord the same in the driverrsquos logbook while taking over charge of thelocomotive
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
DRIVER DISPLAY
The Driver default display has got three screens
1 IDLE Screen2 Motoring Screen3 Braking Screen
Respective screens are changed automatically based on the control stand signals while the locomotive operation is being set by the Driver
In each screen relative parameters are displayed as shown below
ADB(Analog distribution box)
There are 4 Analog Distribution BoxesThese are located at Front panel in the place of VRPTRP
Each ADB Unit generates isolated low voltage source required for the sensors connected to it from the locomotive control voltage of 72V
Each ADB can handle 8 analog inputs from various sensors and transmit them to the Control unit
RDB(RPM Distribution box)
bullRPM Distribution Unit is similar to the Analog Distribution Unit but handles RPM signals
bullThis is located at Front panel in the place of VRPTRP
bullAll the six traction motor RPM sensors are connected to this RDB
ADDITIONAL FEATURES WITH MEP-6601 Limitation of Power to 4th notch with Failure of Dust Exhauster BreakersFailure of dust exhauster motors clog the filters and Quantity of inlet air is reduced Hence the power is limited to 4th notch along with a warning message if the notch above 4th notch
2 Limitation of Power to 4th notch with Failure of RBB or Diode HOTFailure of RBB result in no cooling to power rectifier Similarly if amount of cooling to Rectifier diodes is less due to ay reasons the diodes become HOT In order to safeguard the power rectifier the engine power is restricted to 4th notch
3 Cold Engine based loadingSoon after cranking the engine speed is restricted based on the lube oil temperature till the lube oil temperature is raised up to 60 degcent To improve lubrication
4 Power De-ration from T3 setting to T4 setting (90 to 95 degCent)The engine power is de-rated by 20 of the notch power for every degree raise from 90 deg Onwards
5 8th notch RPM at hottest TemperatureWhen the Engine temperature reached to T4 setting (95 Deg Cen) Engine RPM is raised to 8th notch automatically by cutting of power for faster cooling of engine
6LOW IDLE FEATURE
When the locomotive is in IDLE for more than 10 minutes the engine RPM is reduced to 350 by energising AV and DV for reducing the fuel oil consumption This is posssible only with governors having this option
7Built in Auto switching ON Flasher lights with Simplified circuit
8Self Load box Testing
9Ambient temperature based battery charging
10Event recorder
11Prelubrication
12MULTI RESET VIGILANCE CONTROL DEVICE One VCD reset push button is provided on the control desk near Master handle
MULTI RESET VIGILANCE CONTROL DEVICE
WHY VCD
To stop the train If driver is INCAPACITATED An intelligent vigilance control device with multi-reset feature has
been provided to stop the train if the driver is incapacitated
1048714 The device alerts the driver for every 60 seconds before stopping train If the driver is not alert incapacitated VCD applies there by Engine will come to Idle and penalty brakes will be applied and the train stops
1048714 One VCD alerting lamp provided on each control desk near LED indication panel
1048714 One VCD reset push button is provided on the control desk near master handle
VCD disable unit is provided in the Control PanelPenalty brake application Valve is provided in nose compartment
VCD STARTS FUNCTION
Soon after circuit breakers MB1 MB2 MPCB MFPB1 MFPB2 MCB1 ampMCB2 are switched ON and BCP is less than 21 Kg Sqcm
VCD DOES NOT FUNCTION
If BCP is more than 21 KgSqcm and Loco speed is zero
What VCD do before Penalty BrakesVCD alerts the driver once in every 60 seconds through a Blinking LEDif none of the following activities are performed with in 60 sec1048714 Increase Decrease notch1048708 Application Release of A91048708 Application release of DB1048708 Change of DB level1048708 Operation of GF switches1048708 Change of RH position1048708 Operation of Horn buttons1048708 Operation of Sander buttons1048708 Pressing of VCD reset button
What Driver has to doPerform any of the following loco operations as required or Press VCDRESET button to suppress warning lamp
What if Driver does not respond to VCD warnings
1048708 The Blinking LED continues for 17 seconds1048708 After 17 seconds a buzzer is switched ON along with Blinking LED1048708 A message lsquo 2019 - VCD time out Press VCD reset switchrsquo is displayed on the screen1048708 The blinking LED and buzzer continues for another 17 seconds
What if Driver does not respond up to 94 seconds
The MEP-660 assumes that the driver is dead incapacitated and appliesPenalty Brakes after 94 (60+17+17) seconds and the following changes takesplace in the locomotive1 A message lsquo2301 - VCD Applied Penalty Brakesrsquo will be displayed on the Display Panel2 VCD counter is increased by 13 Buzzer is switched OFF4 LED continue to blink for another 35sec5 BP is reduced to 28 KgSqcm6 Loco Formation brakes are applied7 Engine speed is brought to IDLE8 GF power contactor is dropped out9 Power contactors are dropped out after Master handle brought to IDLE
FOR RELEASING THE PENALTY BRAKES
1 Bring the Throttle to IDLE2 Wait till the blinking LED is OFF3 Wait till the Loco speed is reduced to zero4 Press VCD RESET button
WHILE WAITING FOR SIGNAL IN THE YARD
Apply loco brakes with SA9 to suppress VCD function Ensure BCP is morethan 21 kgSqcm
NOTEbull Always press lsquoVCD resetrsquo switch whenever lsquoVCD LEDrsquo is blinkingbull Donrsquot forget to apply loco brakes while loco is in stand
THE microP LOCOMOTIVE IS WORKING AS REAR LOCOMOTIVE IN MU OPERATION
1 While the locomotive is working as rear loco in MU operation the VCD is not required2 The circuit breakers MCB1 and MCB2 which are available on control desks of Rear Loco should be switched off after making MU set up3 The VCD function is automatically isolated in rear loco and the display shows lsquoVCD in MUrsquo message in the 4th line indicating the status of the VCD4 otherwise ndash What happens 5 Rear loco does not respond to lead loco signalsVCD counterAn incrementing counter by name lsquoVCD Counterrsquo is added in the displayscreen This parameter is visible only when the loco is in idle position Thecount is incremented by one as and when the VCD applies penalty brakeindicating that the driver is not alert
NOTE Please note the reading of this lsquoVCD Counterrsquo on the display unit andrecord the same in the driverrsquos logbook while taking over charge of thelocomotive
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
ADB(Analog distribution box)
There are 4 Analog Distribution BoxesThese are located at Front panel in the place of VRPTRP
Each ADB Unit generates isolated low voltage source required for the sensors connected to it from the locomotive control voltage of 72V
Each ADB can handle 8 analog inputs from various sensors and transmit them to the Control unit
RDB(RPM Distribution box)
bullRPM Distribution Unit is similar to the Analog Distribution Unit but handles RPM signals
bullThis is located at Front panel in the place of VRPTRP
bullAll the six traction motor RPM sensors are connected to this RDB
ADDITIONAL FEATURES WITH MEP-6601 Limitation of Power to 4th notch with Failure of Dust Exhauster BreakersFailure of dust exhauster motors clog the filters and Quantity of inlet air is reduced Hence the power is limited to 4th notch along with a warning message if the notch above 4th notch
2 Limitation of Power to 4th notch with Failure of RBB or Diode HOTFailure of RBB result in no cooling to power rectifier Similarly if amount of cooling to Rectifier diodes is less due to ay reasons the diodes become HOT In order to safeguard the power rectifier the engine power is restricted to 4th notch
3 Cold Engine based loadingSoon after cranking the engine speed is restricted based on the lube oil temperature till the lube oil temperature is raised up to 60 degcent To improve lubrication
4 Power De-ration from T3 setting to T4 setting (90 to 95 degCent)The engine power is de-rated by 20 of the notch power for every degree raise from 90 deg Onwards
5 8th notch RPM at hottest TemperatureWhen the Engine temperature reached to T4 setting (95 Deg Cen) Engine RPM is raised to 8th notch automatically by cutting of power for faster cooling of engine
6LOW IDLE FEATURE
When the locomotive is in IDLE for more than 10 minutes the engine RPM is reduced to 350 by energising AV and DV for reducing the fuel oil consumption This is posssible only with governors having this option
7Built in Auto switching ON Flasher lights with Simplified circuit
8Self Load box Testing
9Ambient temperature based battery charging
10Event recorder
11Prelubrication
12MULTI RESET VIGILANCE CONTROL DEVICE One VCD reset push button is provided on the control desk near Master handle
MULTI RESET VIGILANCE CONTROL DEVICE
WHY VCD
To stop the train If driver is INCAPACITATED An intelligent vigilance control device with multi-reset feature has
been provided to stop the train if the driver is incapacitated
1048714 The device alerts the driver for every 60 seconds before stopping train If the driver is not alert incapacitated VCD applies there by Engine will come to Idle and penalty brakes will be applied and the train stops
1048714 One VCD alerting lamp provided on each control desk near LED indication panel
1048714 One VCD reset push button is provided on the control desk near master handle
VCD disable unit is provided in the Control PanelPenalty brake application Valve is provided in nose compartment
VCD STARTS FUNCTION
Soon after circuit breakers MB1 MB2 MPCB MFPB1 MFPB2 MCB1 ampMCB2 are switched ON and BCP is less than 21 Kg Sqcm
VCD DOES NOT FUNCTION
If BCP is more than 21 KgSqcm and Loco speed is zero
What VCD do before Penalty BrakesVCD alerts the driver once in every 60 seconds through a Blinking LEDif none of the following activities are performed with in 60 sec1048714 Increase Decrease notch1048708 Application Release of A91048708 Application release of DB1048708 Change of DB level1048708 Operation of GF switches1048708 Change of RH position1048708 Operation of Horn buttons1048708 Operation of Sander buttons1048708 Pressing of VCD reset button
What Driver has to doPerform any of the following loco operations as required or Press VCDRESET button to suppress warning lamp
What if Driver does not respond to VCD warnings
1048708 The Blinking LED continues for 17 seconds1048708 After 17 seconds a buzzer is switched ON along with Blinking LED1048708 A message lsquo 2019 - VCD time out Press VCD reset switchrsquo is displayed on the screen1048708 The blinking LED and buzzer continues for another 17 seconds
What if Driver does not respond up to 94 seconds
The MEP-660 assumes that the driver is dead incapacitated and appliesPenalty Brakes after 94 (60+17+17) seconds and the following changes takesplace in the locomotive1 A message lsquo2301 - VCD Applied Penalty Brakesrsquo will be displayed on the Display Panel2 VCD counter is increased by 13 Buzzer is switched OFF4 LED continue to blink for another 35sec5 BP is reduced to 28 KgSqcm6 Loco Formation brakes are applied7 Engine speed is brought to IDLE8 GF power contactor is dropped out9 Power contactors are dropped out after Master handle brought to IDLE
FOR RELEASING THE PENALTY BRAKES
1 Bring the Throttle to IDLE2 Wait till the blinking LED is OFF3 Wait till the Loco speed is reduced to zero4 Press VCD RESET button
WHILE WAITING FOR SIGNAL IN THE YARD
Apply loco brakes with SA9 to suppress VCD function Ensure BCP is morethan 21 kgSqcm
NOTEbull Always press lsquoVCD resetrsquo switch whenever lsquoVCD LEDrsquo is blinkingbull Donrsquot forget to apply loco brakes while loco is in stand
THE microP LOCOMOTIVE IS WORKING AS REAR LOCOMOTIVE IN MU OPERATION
1 While the locomotive is working as rear loco in MU operation the VCD is not required2 The circuit breakers MCB1 and MCB2 which are available on control desks of Rear Loco should be switched off after making MU set up3 The VCD function is automatically isolated in rear loco and the display shows lsquoVCD in MUrsquo message in the 4th line indicating the status of the VCD4 otherwise ndash What happens 5 Rear loco does not respond to lead loco signalsVCD counterAn incrementing counter by name lsquoVCD Counterrsquo is added in the displayscreen This parameter is visible only when the loco is in idle position Thecount is incremented by one as and when the VCD applies penalty brakeindicating that the driver is not alert
NOTE Please note the reading of this lsquoVCD Counterrsquo on the display unit andrecord the same in the driverrsquos logbook while taking over charge of thelocomotive
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
RDB(RPM Distribution box)
bullRPM Distribution Unit is similar to the Analog Distribution Unit but handles RPM signals
bullThis is located at Front panel in the place of VRPTRP
bullAll the six traction motor RPM sensors are connected to this RDB
ADDITIONAL FEATURES WITH MEP-6601 Limitation of Power to 4th notch with Failure of Dust Exhauster BreakersFailure of dust exhauster motors clog the filters and Quantity of inlet air is reduced Hence the power is limited to 4th notch along with a warning message if the notch above 4th notch
2 Limitation of Power to 4th notch with Failure of RBB or Diode HOTFailure of RBB result in no cooling to power rectifier Similarly if amount of cooling to Rectifier diodes is less due to ay reasons the diodes become HOT In order to safeguard the power rectifier the engine power is restricted to 4th notch
3 Cold Engine based loadingSoon after cranking the engine speed is restricted based on the lube oil temperature till the lube oil temperature is raised up to 60 degcent To improve lubrication
4 Power De-ration from T3 setting to T4 setting (90 to 95 degCent)The engine power is de-rated by 20 of the notch power for every degree raise from 90 deg Onwards
5 8th notch RPM at hottest TemperatureWhen the Engine temperature reached to T4 setting (95 Deg Cen) Engine RPM is raised to 8th notch automatically by cutting of power for faster cooling of engine
6LOW IDLE FEATURE
When the locomotive is in IDLE for more than 10 minutes the engine RPM is reduced to 350 by energising AV and DV for reducing the fuel oil consumption This is posssible only with governors having this option
7Built in Auto switching ON Flasher lights with Simplified circuit
8Self Load box Testing
9Ambient temperature based battery charging
10Event recorder
11Prelubrication
12MULTI RESET VIGILANCE CONTROL DEVICE One VCD reset push button is provided on the control desk near Master handle
MULTI RESET VIGILANCE CONTROL DEVICE
WHY VCD
To stop the train If driver is INCAPACITATED An intelligent vigilance control device with multi-reset feature has
been provided to stop the train if the driver is incapacitated
1048714 The device alerts the driver for every 60 seconds before stopping train If the driver is not alert incapacitated VCD applies there by Engine will come to Idle and penalty brakes will be applied and the train stops
1048714 One VCD alerting lamp provided on each control desk near LED indication panel
1048714 One VCD reset push button is provided on the control desk near master handle
VCD disable unit is provided in the Control PanelPenalty brake application Valve is provided in nose compartment
VCD STARTS FUNCTION
Soon after circuit breakers MB1 MB2 MPCB MFPB1 MFPB2 MCB1 ampMCB2 are switched ON and BCP is less than 21 Kg Sqcm
VCD DOES NOT FUNCTION
If BCP is more than 21 KgSqcm and Loco speed is zero
What VCD do before Penalty BrakesVCD alerts the driver once in every 60 seconds through a Blinking LEDif none of the following activities are performed with in 60 sec1048714 Increase Decrease notch1048708 Application Release of A91048708 Application release of DB1048708 Change of DB level1048708 Operation of GF switches1048708 Change of RH position1048708 Operation of Horn buttons1048708 Operation of Sander buttons1048708 Pressing of VCD reset button
What Driver has to doPerform any of the following loco operations as required or Press VCDRESET button to suppress warning lamp
What if Driver does not respond to VCD warnings
1048708 The Blinking LED continues for 17 seconds1048708 After 17 seconds a buzzer is switched ON along with Blinking LED1048708 A message lsquo 2019 - VCD time out Press VCD reset switchrsquo is displayed on the screen1048708 The blinking LED and buzzer continues for another 17 seconds
What if Driver does not respond up to 94 seconds
The MEP-660 assumes that the driver is dead incapacitated and appliesPenalty Brakes after 94 (60+17+17) seconds and the following changes takesplace in the locomotive1 A message lsquo2301 - VCD Applied Penalty Brakesrsquo will be displayed on the Display Panel2 VCD counter is increased by 13 Buzzer is switched OFF4 LED continue to blink for another 35sec5 BP is reduced to 28 KgSqcm6 Loco Formation brakes are applied7 Engine speed is brought to IDLE8 GF power contactor is dropped out9 Power contactors are dropped out after Master handle brought to IDLE
FOR RELEASING THE PENALTY BRAKES
1 Bring the Throttle to IDLE2 Wait till the blinking LED is OFF3 Wait till the Loco speed is reduced to zero4 Press VCD RESET button
WHILE WAITING FOR SIGNAL IN THE YARD
Apply loco brakes with SA9 to suppress VCD function Ensure BCP is morethan 21 kgSqcm
NOTEbull Always press lsquoVCD resetrsquo switch whenever lsquoVCD LEDrsquo is blinkingbull Donrsquot forget to apply loco brakes while loco is in stand
THE microP LOCOMOTIVE IS WORKING AS REAR LOCOMOTIVE IN MU OPERATION
1 While the locomotive is working as rear loco in MU operation the VCD is not required2 The circuit breakers MCB1 and MCB2 which are available on control desks of Rear Loco should be switched off after making MU set up3 The VCD function is automatically isolated in rear loco and the display shows lsquoVCD in MUrsquo message in the 4th line indicating the status of the VCD4 otherwise ndash What happens 5 Rear loco does not respond to lead loco signalsVCD counterAn incrementing counter by name lsquoVCD Counterrsquo is added in the displayscreen This parameter is visible only when the loco is in idle position Thecount is incremented by one as and when the VCD applies penalty brakeindicating that the driver is not alert
NOTE Please note the reading of this lsquoVCD Counterrsquo on the display unit andrecord the same in the driverrsquos logbook while taking over charge of thelocomotive
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
ADDITIONAL FEATURES WITH MEP-6601 Limitation of Power to 4th notch with Failure of Dust Exhauster BreakersFailure of dust exhauster motors clog the filters and Quantity of inlet air is reduced Hence the power is limited to 4th notch along with a warning message if the notch above 4th notch
2 Limitation of Power to 4th notch with Failure of RBB or Diode HOTFailure of RBB result in no cooling to power rectifier Similarly if amount of cooling to Rectifier diodes is less due to ay reasons the diodes become HOT In order to safeguard the power rectifier the engine power is restricted to 4th notch
3 Cold Engine based loadingSoon after cranking the engine speed is restricted based on the lube oil temperature till the lube oil temperature is raised up to 60 degcent To improve lubrication
4 Power De-ration from T3 setting to T4 setting (90 to 95 degCent)The engine power is de-rated by 20 of the notch power for every degree raise from 90 deg Onwards
5 8th notch RPM at hottest TemperatureWhen the Engine temperature reached to T4 setting (95 Deg Cen) Engine RPM is raised to 8th notch automatically by cutting of power for faster cooling of engine
6LOW IDLE FEATURE
When the locomotive is in IDLE for more than 10 minutes the engine RPM is reduced to 350 by energising AV and DV for reducing the fuel oil consumption This is posssible only with governors having this option
7Built in Auto switching ON Flasher lights with Simplified circuit
8Self Load box Testing
9Ambient temperature based battery charging
10Event recorder
11Prelubrication
12MULTI RESET VIGILANCE CONTROL DEVICE One VCD reset push button is provided on the control desk near Master handle
MULTI RESET VIGILANCE CONTROL DEVICE
WHY VCD
To stop the train If driver is INCAPACITATED An intelligent vigilance control device with multi-reset feature has
been provided to stop the train if the driver is incapacitated
1048714 The device alerts the driver for every 60 seconds before stopping train If the driver is not alert incapacitated VCD applies there by Engine will come to Idle and penalty brakes will be applied and the train stops
1048714 One VCD alerting lamp provided on each control desk near LED indication panel
1048714 One VCD reset push button is provided on the control desk near master handle
VCD disable unit is provided in the Control PanelPenalty brake application Valve is provided in nose compartment
VCD STARTS FUNCTION
Soon after circuit breakers MB1 MB2 MPCB MFPB1 MFPB2 MCB1 ampMCB2 are switched ON and BCP is less than 21 Kg Sqcm
VCD DOES NOT FUNCTION
If BCP is more than 21 KgSqcm and Loco speed is zero
What VCD do before Penalty BrakesVCD alerts the driver once in every 60 seconds through a Blinking LEDif none of the following activities are performed with in 60 sec1048714 Increase Decrease notch1048708 Application Release of A91048708 Application release of DB1048708 Change of DB level1048708 Operation of GF switches1048708 Change of RH position1048708 Operation of Horn buttons1048708 Operation of Sander buttons1048708 Pressing of VCD reset button
What Driver has to doPerform any of the following loco operations as required or Press VCDRESET button to suppress warning lamp
What if Driver does not respond to VCD warnings
1048708 The Blinking LED continues for 17 seconds1048708 After 17 seconds a buzzer is switched ON along with Blinking LED1048708 A message lsquo 2019 - VCD time out Press VCD reset switchrsquo is displayed on the screen1048708 The blinking LED and buzzer continues for another 17 seconds
What if Driver does not respond up to 94 seconds
The MEP-660 assumes that the driver is dead incapacitated and appliesPenalty Brakes after 94 (60+17+17) seconds and the following changes takesplace in the locomotive1 A message lsquo2301 - VCD Applied Penalty Brakesrsquo will be displayed on the Display Panel2 VCD counter is increased by 13 Buzzer is switched OFF4 LED continue to blink for another 35sec5 BP is reduced to 28 KgSqcm6 Loco Formation brakes are applied7 Engine speed is brought to IDLE8 GF power contactor is dropped out9 Power contactors are dropped out after Master handle brought to IDLE
FOR RELEASING THE PENALTY BRAKES
1 Bring the Throttle to IDLE2 Wait till the blinking LED is OFF3 Wait till the Loco speed is reduced to zero4 Press VCD RESET button
WHILE WAITING FOR SIGNAL IN THE YARD
Apply loco brakes with SA9 to suppress VCD function Ensure BCP is morethan 21 kgSqcm
NOTEbull Always press lsquoVCD resetrsquo switch whenever lsquoVCD LEDrsquo is blinkingbull Donrsquot forget to apply loco brakes while loco is in stand
THE microP LOCOMOTIVE IS WORKING AS REAR LOCOMOTIVE IN MU OPERATION
1 While the locomotive is working as rear loco in MU operation the VCD is not required2 The circuit breakers MCB1 and MCB2 which are available on control desks of Rear Loco should be switched off after making MU set up3 The VCD function is automatically isolated in rear loco and the display shows lsquoVCD in MUrsquo message in the 4th line indicating the status of the VCD4 otherwise ndash What happens 5 Rear loco does not respond to lead loco signalsVCD counterAn incrementing counter by name lsquoVCD Counterrsquo is added in the displayscreen This parameter is visible only when the loco is in idle position Thecount is incremented by one as and when the VCD applies penalty brakeindicating that the driver is not alert
NOTE Please note the reading of this lsquoVCD Counterrsquo on the display unit andrecord the same in the driverrsquos logbook while taking over charge of thelocomotive
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
6LOW IDLE FEATURE
When the locomotive is in IDLE for more than 10 minutes the engine RPM is reduced to 350 by energising AV and DV for reducing the fuel oil consumption This is posssible only with governors having this option
7Built in Auto switching ON Flasher lights with Simplified circuit
8Self Load box Testing
9Ambient temperature based battery charging
10Event recorder
11Prelubrication
12MULTI RESET VIGILANCE CONTROL DEVICE One VCD reset push button is provided on the control desk near Master handle
MULTI RESET VIGILANCE CONTROL DEVICE
WHY VCD
To stop the train If driver is INCAPACITATED An intelligent vigilance control device with multi-reset feature has
been provided to stop the train if the driver is incapacitated
1048714 The device alerts the driver for every 60 seconds before stopping train If the driver is not alert incapacitated VCD applies there by Engine will come to Idle and penalty brakes will be applied and the train stops
1048714 One VCD alerting lamp provided on each control desk near LED indication panel
1048714 One VCD reset push button is provided on the control desk near master handle
VCD disable unit is provided in the Control PanelPenalty brake application Valve is provided in nose compartment
VCD STARTS FUNCTION
Soon after circuit breakers MB1 MB2 MPCB MFPB1 MFPB2 MCB1 ampMCB2 are switched ON and BCP is less than 21 Kg Sqcm
VCD DOES NOT FUNCTION
If BCP is more than 21 KgSqcm and Loco speed is zero
What VCD do before Penalty BrakesVCD alerts the driver once in every 60 seconds through a Blinking LEDif none of the following activities are performed with in 60 sec1048714 Increase Decrease notch1048708 Application Release of A91048708 Application release of DB1048708 Change of DB level1048708 Operation of GF switches1048708 Change of RH position1048708 Operation of Horn buttons1048708 Operation of Sander buttons1048708 Pressing of VCD reset button
What Driver has to doPerform any of the following loco operations as required or Press VCDRESET button to suppress warning lamp
What if Driver does not respond to VCD warnings
1048708 The Blinking LED continues for 17 seconds1048708 After 17 seconds a buzzer is switched ON along with Blinking LED1048708 A message lsquo 2019 - VCD time out Press VCD reset switchrsquo is displayed on the screen1048708 The blinking LED and buzzer continues for another 17 seconds
What if Driver does not respond up to 94 seconds
The MEP-660 assumes that the driver is dead incapacitated and appliesPenalty Brakes after 94 (60+17+17) seconds and the following changes takesplace in the locomotive1 A message lsquo2301 - VCD Applied Penalty Brakesrsquo will be displayed on the Display Panel2 VCD counter is increased by 13 Buzzer is switched OFF4 LED continue to blink for another 35sec5 BP is reduced to 28 KgSqcm6 Loco Formation brakes are applied7 Engine speed is brought to IDLE8 GF power contactor is dropped out9 Power contactors are dropped out after Master handle brought to IDLE
FOR RELEASING THE PENALTY BRAKES
1 Bring the Throttle to IDLE2 Wait till the blinking LED is OFF3 Wait till the Loco speed is reduced to zero4 Press VCD RESET button
WHILE WAITING FOR SIGNAL IN THE YARD
Apply loco brakes with SA9 to suppress VCD function Ensure BCP is morethan 21 kgSqcm
NOTEbull Always press lsquoVCD resetrsquo switch whenever lsquoVCD LEDrsquo is blinkingbull Donrsquot forget to apply loco brakes while loco is in stand
THE microP LOCOMOTIVE IS WORKING AS REAR LOCOMOTIVE IN MU OPERATION
1 While the locomotive is working as rear loco in MU operation the VCD is not required2 The circuit breakers MCB1 and MCB2 which are available on control desks of Rear Loco should be switched off after making MU set up3 The VCD function is automatically isolated in rear loco and the display shows lsquoVCD in MUrsquo message in the 4th line indicating the status of the VCD4 otherwise ndash What happens 5 Rear loco does not respond to lead loco signalsVCD counterAn incrementing counter by name lsquoVCD Counterrsquo is added in the displayscreen This parameter is visible only when the loco is in idle position Thecount is incremented by one as and when the VCD applies penalty brakeindicating that the driver is not alert
NOTE Please note the reading of this lsquoVCD Counterrsquo on the display unit andrecord the same in the driverrsquos logbook while taking over charge of thelocomotive
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
MULTI RESET VIGILANCE CONTROL DEVICE
WHY VCD
To stop the train If driver is INCAPACITATED An intelligent vigilance control device with multi-reset feature has
been provided to stop the train if the driver is incapacitated
1048714 The device alerts the driver for every 60 seconds before stopping train If the driver is not alert incapacitated VCD applies there by Engine will come to Idle and penalty brakes will be applied and the train stops
1048714 One VCD alerting lamp provided on each control desk near LED indication panel
1048714 One VCD reset push button is provided on the control desk near master handle
VCD disable unit is provided in the Control PanelPenalty brake application Valve is provided in nose compartment
VCD STARTS FUNCTION
Soon after circuit breakers MB1 MB2 MPCB MFPB1 MFPB2 MCB1 ampMCB2 are switched ON and BCP is less than 21 Kg Sqcm
VCD DOES NOT FUNCTION
If BCP is more than 21 KgSqcm and Loco speed is zero
What VCD do before Penalty BrakesVCD alerts the driver once in every 60 seconds through a Blinking LEDif none of the following activities are performed with in 60 sec1048714 Increase Decrease notch1048708 Application Release of A91048708 Application release of DB1048708 Change of DB level1048708 Operation of GF switches1048708 Change of RH position1048708 Operation of Horn buttons1048708 Operation of Sander buttons1048708 Pressing of VCD reset button
What Driver has to doPerform any of the following loco operations as required or Press VCDRESET button to suppress warning lamp
What if Driver does not respond to VCD warnings
1048708 The Blinking LED continues for 17 seconds1048708 After 17 seconds a buzzer is switched ON along with Blinking LED1048708 A message lsquo 2019 - VCD time out Press VCD reset switchrsquo is displayed on the screen1048708 The blinking LED and buzzer continues for another 17 seconds
What if Driver does not respond up to 94 seconds
The MEP-660 assumes that the driver is dead incapacitated and appliesPenalty Brakes after 94 (60+17+17) seconds and the following changes takesplace in the locomotive1 A message lsquo2301 - VCD Applied Penalty Brakesrsquo will be displayed on the Display Panel2 VCD counter is increased by 13 Buzzer is switched OFF4 LED continue to blink for another 35sec5 BP is reduced to 28 KgSqcm6 Loco Formation brakes are applied7 Engine speed is brought to IDLE8 GF power contactor is dropped out9 Power contactors are dropped out after Master handle brought to IDLE
FOR RELEASING THE PENALTY BRAKES
1 Bring the Throttle to IDLE2 Wait till the blinking LED is OFF3 Wait till the Loco speed is reduced to zero4 Press VCD RESET button
WHILE WAITING FOR SIGNAL IN THE YARD
Apply loco brakes with SA9 to suppress VCD function Ensure BCP is morethan 21 kgSqcm
NOTEbull Always press lsquoVCD resetrsquo switch whenever lsquoVCD LEDrsquo is blinkingbull Donrsquot forget to apply loco brakes while loco is in stand
THE microP LOCOMOTIVE IS WORKING AS REAR LOCOMOTIVE IN MU OPERATION
1 While the locomotive is working as rear loco in MU operation the VCD is not required2 The circuit breakers MCB1 and MCB2 which are available on control desks of Rear Loco should be switched off after making MU set up3 The VCD function is automatically isolated in rear loco and the display shows lsquoVCD in MUrsquo message in the 4th line indicating the status of the VCD4 otherwise ndash What happens 5 Rear loco does not respond to lead loco signalsVCD counterAn incrementing counter by name lsquoVCD Counterrsquo is added in the displayscreen This parameter is visible only when the loco is in idle position Thecount is incremented by one as and when the VCD applies penalty brakeindicating that the driver is not alert
NOTE Please note the reading of this lsquoVCD Counterrsquo on the display unit andrecord the same in the driverrsquos logbook while taking over charge of thelocomotive
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
VCD disable unit is provided in the Control PanelPenalty brake application Valve is provided in nose compartment
VCD STARTS FUNCTION
Soon after circuit breakers MB1 MB2 MPCB MFPB1 MFPB2 MCB1 ampMCB2 are switched ON and BCP is less than 21 Kg Sqcm
VCD DOES NOT FUNCTION
If BCP is more than 21 KgSqcm and Loco speed is zero
What VCD do before Penalty BrakesVCD alerts the driver once in every 60 seconds through a Blinking LEDif none of the following activities are performed with in 60 sec1048714 Increase Decrease notch1048708 Application Release of A91048708 Application release of DB1048708 Change of DB level1048708 Operation of GF switches1048708 Change of RH position1048708 Operation of Horn buttons1048708 Operation of Sander buttons1048708 Pressing of VCD reset button
What Driver has to doPerform any of the following loco operations as required or Press VCDRESET button to suppress warning lamp
What if Driver does not respond to VCD warnings
1048708 The Blinking LED continues for 17 seconds1048708 After 17 seconds a buzzer is switched ON along with Blinking LED1048708 A message lsquo 2019 - VCD time out Press VCD reset switchrsquo is displayed on the screen1048708 The blinking LED and buzzer continues for another 17 seconds
What if Driver does not respond up to 94 seconds
The MEP-660 assumes that the driver is dead incapacitated and appliesPenalty Brakes after 94 (60+17+17) seconds and the following changes takesplace in the locomotive1 A message lsquo2301 - VCD Applied Penalty Brakesrsquo will be displayed on the Display Panel2 VCD counter is increased by 13 Buzzer is switched OFF4 LED continue to blink for another 35sec5 BP is reduced to 28 KgSqcm6 Loco Formation brakes are applied7 Engine speed is brought to IDLE8 GF power contactor is dropped out9 Power contactors are dropped out after Master handle brought to IDLE
FOR RELEASING THE PENALTY BRAKES
1 Bring the Throttle to IDLE2 Wait till the blinking LED is OFF3 Wait till the Loco speed is reduced to zero4 Press VCD RESET button
WHILE WAITING FOR SIGNAL IN THE YARD
Apply loco brakes with SA9 to suppress VCD function Ensure BCP is morethan 21 kgSqcm
NOTEbull Always press lsquoVCD resetrsquo switch whenever lsquoVCD LEDrsquo is blinkingbull Donrsquot forget to apply loco brakes while loco is in stand
THE microP LOCOMOTIVE IS WORKING AS REAR LOCOMOTIVE IN MU OPERATION
1 While the locomotive is working as rear loco in MU operation the VCD is not required2 The circuit breakers MCB1 and MCB2 which are available on control desks of Rear Loco should be switched off after making MU set up3 The VCD function is automatically isolated in rear loco and the display shows lsquoVCD in MUrsquo message in the 4th line indicating the status of the VCD4 otherwise ndash What happens 5 Rear loco does not respond to lead loco signalsVCD counterAn incrementing counter by name lsquoVCD Counterrsquo is added in the displayscreen This parameter is visible only when the loco is in idle position Thecount is incremented by one as and when the VCD applies penalty brakeindicating that the driver is not alert
NOTE Please note the reading of this lsquoVCD Counterrsquo on the display unit andrecord the same in the driverrsquos logbook while taking over charge of thelocomotive
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
VCD DOES NOT FUNCTION
If BCP is more than 21 KgSqcm and Loco speed is zero
What VCD do before Penalty BrakesVCD alerts the driver once in every 60 seconds through a Blinking LEDif none of the following activities are performed with in 60 sec1048714 Increase Decrease notch1048708 Application Release of A91048708 Application release of DB1048708 Change of DB level1048708 Operation of GF switches1048708 Change of RH position1048708 Operation of Horn buttons1048708 Operation of Sander buttons1048708 Pressing of VCD reset button
What Driver has to doPerform any of the following loco operations as required or Press VCDRESET button to suppress warning lamp
What if Driver does not respond to VCD warnings
1048708 The Blinking LED continues for 17 seconds1048708 After 17 seconds a buzzer is switched ON along with Blinking LED1048708 A message lsquo 2019 - VCD time out Press VCD reset switchrsquo is displayed on the screen1048708 The blinking LED and buzzer continues for another 17 seconds
What if Driver does not respond up to 94 seconds
The MEP-660 assumes that the driver is dead incapacitated and appliesPenalty Brakes after 94 (60+17+17) seconds and the following changes takesplace in the locomotive1 A message lsquo2301 - VCD Applied Penalty Brakesrsquo will be displayed on the Display Panel2 VCD counter is increased by 13 Buzzer is switched OFF4 LED continue to blink for another 35sec5 BP is reduced to 28 KgSqcm6 Loco Formation brakes are applied7 Engine speed is brought to IDLE8 GF power contactor is dropped out9 Power contactors are dropped out after Master handle brought to IDLE
FOR RELEASING THE PENALTY BRAKES
1 Bring the Throttle to IDLE2 Wait till the blinking LED is OFF3 Wait till the Loco speed is reduced to zero4 Press VCD RESET button
WHILE WAITING FOR SIGNAL IN THE YARD
Apply loco brakes with SA9 to suppress VCD function Ensure BCP is morethan 21 kgSqcm
NOTEbull Always press lsquoVCD resetrsquo switch whenever lsquoVCD LEDrsquo is blinkingbull Donrsquot forget to apply loco brakes while loco is in stand
THE microP LOCOMOTIVE IS WORKING AS REAR LOCOMOTIVE IN MU OPERATION
1 While the locomotive is working as rear loco in MU operation the VCD is not required2 The circuit breakers MCB1 and MCB2 which are available on control desks of Rear Loco should be switched off after making MU set up3 The VCD function is automatically isolated in rear loco and the display shows lsquoVCD in MUrsquo message in the 4th line indicating the status of the VCD4 otherwise ndash What happens 5 Rear loco does not respond to lead loco signalsVCD counterAn incrementing counter by name lsquoVCD Counterrsquo is added in the displayscreen This parameter is visible only when the loco is in idle position Thecount is incremented by one as and when the VCD applies penalty brakeindicating that the driver is not alert
NOTE Please note the reading of this lsquoVCD Counterrsquo on the display unit andrecord the same in the driverrsquos logbook while taking over charge of thelocomotive
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
What if Driver does not respond to VCD warnings
1048708 The Blinking LED continues for 17 seconds1048708 After 17 seconds a buzzer is switched ON along with Blinking LED1048708 A message lsquo 2019 - VCD time out Press VCD reset switchrsquo is displayed on the screen1048708 The blinking LED and buzzer continues for another 17 seconds
What if Driver does not respond up to 94 seconds
The MEP-660 assumes that the driver is dead incapacitated and appliesPenalty Brakes after 94 (60+17+17) seconds and the following changes takesplace in the locomotive1 A message lsquo2301 - VCD Applied Penalty Brakesrsquo will be displayed on the Display Panel2 VCD counter is increased by 13 Buzzer is switched OFF4 LED continue to blink for another 35sec5 BP is reduced to 28 KgSqcm6 Loco Formation brakes are applied7 Engine speed is brought to IDLE8 GF power contactor is dropped out9 Power contactors are dropped out after Master handle brought to IDLE
FOR RELEASING THE PENALTY BRAKES
1 Bring the Throttle to IDLE2 Wait till the blinking LED is OFF3 Wait till the Loco speed is reduced to zero4 Press VCD RESET button
WHILE WAITING FOR SIGNAL IN THE YARD
Apply loco brakes with SA9 to suppress VCD function Ensure BCP is morethan 21 kgSqcm
NOTEbull Always press lsquoVCD resetrsquo switch whenever lsquoVCD LEDrsquo is blinkingbull Donrsquot forget to apply loco brakes while loco is in stand
THE microP LOCOMOTIVE IS WORKING AS REAR LOCOMOTIVE IN MU OPERATION
1 While the locomotive is working as rear loco in MU operation the VCD is not required2 The circuit breakers MCB1 and MCB2 which are available on control desks of Rear Loco should be switched off after making MU set up3 The VCD function is automatically isolated in rear loco and the display shows lsquoVCD in MUrsquo message in the 4th line indicating the status of the VCD4 otherwise ndash What happens 5 Rear loco does not respond to lead loco signalsVCD counterAn incrementing counter by name lsquoVCD Counterrsquo is added in the displayscreen This parameter is visible only when the loco is in idle position Thecount is incremented by one as and when the VCD applies penalty brakeindicating that the driver is not alert
NOTE Please note the reading of this lsquoVCD Counterrsquo on the display unit andrecord the same in the driverrsquos logbook while taking over charge of thelocomotive
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
FOR RELEASING THE PENALTY BRAKES
1 Bring the Throttle to IDLE2 Wait till the blinking LED is OFF3 Wait till the Loco speed is reduced to zero4 Press VCD RESET button
WHILE WAITING FOR SIGNAL IN THE YARD
Apply loco brakes with SA9 to suppress VCD function Ensure BCP is morethan 21 kgSqcm
NOTEbull Always press lsquoVCD resetrsquo switch whenever lsquoVCD LEDrsquo is blinkingbull Donrsquot forget to apply loco brakes while loco is in stand
THE microP LOCOMOTIVE IS WORKING AS REAR LOCOMOTIVE IN MU OPERATION
1 While the locomotive is working as rear loco in MU operation the VCD is not required2 The circuit breakers MCB1 and MCB2 which are available on control desks of Rear Loco should be switched off after making MU set up3 The VCD function is automatically isolated in rear loco and the display shows lsquoVCD in MUrsquo message in the 4th line indicating the status of the VCD4 otherwise ndash What happens 5 Rear loco does not respond to lead loco signalsVCD counterAn incrementing counter by name lsquoVCD Counterrsquo is added in the displayscreen This parameter is visible only when the loco is in idle position Thecount is incremented by one as and when the VCD applies penalty brakeindicating that the driver is not alert
NOTE Please note the reading of this lsquoVCD Counterrsquo on the display unit andrecord the same in the driverrsquos logbook while taking over charge of thelocomotive
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
THE microP LOCOMOTIVE IS WORKING AS REAR LOCOMOTIVE IN MU OPERATION
1 While the locomotive is working as rear loco in MU operation the VCD is not required2 The circuit breakers MCB1 and MCB2 which are available on control desks of Rear Loco should be switched off after making MU set up3 The VCD function is automatically isolated in rear loco and the display shows lsquoVCD in MUrsquo message in the 4th line indicating the status of the VCD4 otherwise ndash What happens 5 Rear loco does not respond to lead loco signalsVCD counterAn incrementing counter by name lsquoVCD Counterrsquo is added in the displayscreen This parameter is visible only when the loco is in idle position Thecount is incremented by one as and when the VCD applies penalty brakeindicating that the driver is not alert
NOTE Please note the reading of this lsquoVCD Counterrsquo on the display unit andrecord the same in the driverrsquos logbook while taking over charge of thelocomotive
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
TO ISOLATE VCD
1 In case of continuous penalty brake application due to any reason then Break the glass and switch off the VCD disable switch provided in the control panel to disable VCD function
2 The MEP-660 records a message lsquoOperator disabled VCDrsquo in the fault log with date and time
BP dropping continuously throughrdquo VCDrdquo magnet valve
Close the cut out cock side of the lsquoVCD magnet valversquo if air is leakingfrom the VCD magnet valve
Warning
After Closing VCD coc even though VCD applies penalty Loco brakes will not come but Engine will come to Idle
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
INDICATIONS ON CONTROL DESK
SAFETY ALARM INDICATIONS CIRCUIT BREAKER PANEL
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message A warning messageldquo2000 - No Battery charging due to major faultsrdquois displayed on the screen with buzzer for 30 seconds for every 10 minutes as long as battery voltage is greater than 60V
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
Indication AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message Actually there are different faults for batteries not charging A relevant message concerned to the fault is logged first After logging the fault message the above message is displayed to driver as warning since loco is running on batteries
1062 ndash Battery voltage is high1063 ndash AG field drive short1141 ndash AG output high fault1142 ndash Battery charging current high1143 ndash AG output over current fault1144 ndash AG field over current1145 ndash AG output open circuit fault1146 ndash AG field circuit open or short
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
Indication
AGFail
Reasons for indication
Aux Generator failed to develop voltage and Batteries are not charging
Message If the voltage is less than 60V a warning message lsquolsquo1061 - Battery Voltage is Low Warning Loco may stallrsquo with buzzer sound for 30 seconds for every 10 minutes
Action by Loco Pilot
Check for tripped AGFB and MB1 breakers Check for tightness of ESS connector at ESS
Reset message
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
Indication
CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message ldquo1029 ndash Cranking Contactor CK Stuck ClosedRestrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlarm gong switched on continuously
Action by Loco Pilot
Normally at the end of each cranking this indication glows for about 15 seconds If the indication does not stop after 2 to 3 seconds check up for any welding of CK1CK2CK3 tipsShutdown the engine Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVEREDs
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
Indication CK TIP WELD
Reasons for indication
Main tips of Cranking contactor CK1CK2CK3 got welded
Message In case engine did not crank but cranking tips of any cranking contactor CK1CK2CK3 are welded and the driver tries to re-crank without noticing the above warnings a second message will be displayed ldquo2029 - Cranking Contactor Stuck ClosedRestrictions Cranking Prohibitedrdquo5 Sec buzzer will be given
Action by Loco Pilot
Open battery Knife switch Separate the welded tips with a wooden stick After the tips are separated Alarm bell stops and the reset message is displayed
Reset message
Cranking contactor stuck closed FAULT RECOVERED
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
Indication Over Load
Reasons for indication
Tr Alternator Field current is more than 280 Amps
Message ldquo1027-Alternator Field over current FAULT Restrictions motoring prohibited dynamic brake prohibitedrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Bring throttle to IDLE The fault is reset automatically Reset message is displayed Trouble shoot as per GFOLR trip in normal WDG3A locomotives
Reset Message
Alternator field over current reset for 5 seconds
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
Over load Fault
If the fault is existingThe fault is logged again
Auto reset is permitted up to 3 times within 1 hour
There after manual reset has to be done
If the fault is occurred more than 3 times contact shed for further adviceDo not forget to write in the repair book
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
Indication DEB (Eng)
Reasons for indication
DEB (Eng) circuit breaker tripped Switched OFF
Message ldquo1155 - DEB Engine Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Eng) circuit breaker
Reset Message
ldquoDEB engine breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication DEB (Car)
Reasons for indication
DEB (Car) circuit breaker tripped Switched OFF
Message ldquo1156 - DEB Car body Breaker OffrdquoAlarm gong switched on for 30 seconds
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the DEB (Car) circuit breaker
Reset Message
ldquoDEB car body breaker on now Breaker fault recoveredrdquo for 5 seconds
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
Indication
CEB Fail
Reasons for indication
CEB circuit breaker tripped Switched OFF
Message ldquo2022 - Switch ON CEB Breakerrdquo with buzzer sound after 25 secondsIf the CEB breaker is not switched ON with in 30 minutes A message ldquoCEB Breaker OFFrdquois logged in fault data
Action by Loco Pilot
Check up any problem with motor and trouble shoot as per tripped breaker in WDG3A Switch ON the CEB circuit breaker
Reset Message
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
Indication
Low Lube Oil
Reasons for indication
LLOB in Woodward Governor tripped
Message lsquo1005 ndashLLOB trip ndash Reset plunger Restrictions Cranking Prohibitedrsquorsquo Alarm bell is switched ON continuously till LLOB is resetThe fault code is 1004 if the ldquoLLOB tripped in Engine OFFrdquo conditionIf the fault is existing the fault is logged again
Action by Loco Pilot
Reset LLOB in Gov Reset fault as per the reset procedure or wait for 20 seconds after LLOB is reset till the system recovers from faultRe crank after the above reset
Reset Message
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
Indication HOT Engine
Reasons for indication
Water temperature is more than 90o C
Message ldquo2008 - Warning ENGINE Temperature High Reduce Powerrdquo for 5 seconds Alarm bell is switched ON continuously till temperature is less than 85o C
Action by Loco Pilot
If possible do fast pumping manually OtherwisePower is de-rated by 20 per every degree of temperature raise from 90oC onwardsDriver can work with reduced power up to 95o C
Reset Message
-
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
Indication
HOT Engine
Reasons for indication
Water temperature is more than 95ordm C
Message ldquo1006 - HOT ENGINE Canrsquot Power UP Restrictions Motoring Prohibited Dynamic Brake ProhibitedrdquoAlong with buzzer continuously in addition to alarm bellGF and power contactors are dropped out Engine RPM is automatically raised to 8th notch irrespective of notch positionIf reset button is pressed or after 30 secondsldquo2026 - HOT ENGINE Canrsquot Power UPRestrictions Engine is running at 8th notch Motoring Prohibited Dynamic Brake Prohibitedldquo along with buzzer
Action by Loco Pilot
Apply train brakes Wait till the water temperature is reduced below 90oC Bring the master handle to IDLE Engine speed reduces to IDLE automatically Buzzer and message stops
Reset Message
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
Indication Ground LED
Reasons for indication
TANGI detected power circuit is grounded
Message ldquo1007 - Power Circuit Ground Restrictions Motoring Prohibited Dynamic Brake Prohibited Engine IDLErdquo with continuous alarm bell till throttle is brought to IDLEPower is cut off Engine RPM is brought to IDLE Power contactors and GF are dropped out
Action by Loco Pilot
Bring the throttle to IDLE and wait for 15 SecThe fault is cleared automaticallyPERFORM THE CHECKS AS PER THE CONVENTIONAL WDG3A LOCO
Reset Message
Power circuit ground fault recovered for 5 seconds
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
Indication
Wheel Slip LED
Reasons for indication
MEP 660 sensed difference of wheel RPM and one of the wheel is physically slipping from track Power is reduced to 85
Message Sander relay operated Auto sanding is appliedWhen power reduction is 40 then a Fault messagelsquo2582-High wheel slip occurredrsquo is recorded
Action by Loco Pilot
Do not reduce the notch as long as loco is moving If wheel slip is continuous ensure working of sanders Operate like conventional WDG3A loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
Indication
VCD Lamp
Reasons for indication
Loco Pilot did not performed any of the loco operations or not pressed VCD reset switch with in 60 seconds
Message ldquoVCD time out Press VCD resetrdquo message is displayed after 17 seconds along with buzzer
Action by Loco Pilot
PRESS VCD RESET BUTTON ONCE or perform any loco operations as listed under VCD explanation
Reset Message
--
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
Indication
AFL LED
Reasons for indication
Un authorized BP reduction
Action by Loco Pilot
Ensure there is no unauthorized BP reduction due to train partingIf so act as per the rail road rules applicableIf not Press AFL reset switch to reset flasher lights
Reset Message
--
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
Indication
Air Flow LED
Reasons for indication
Reduction in BP due to passenger chain pulling or excessive leakages
BP charging rate is more as sensed by Air flow measuring valve
Message --
Action by Loco Pilot
Act as in the case of conventional WDG3A
Reset Message
--
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
TROUBLE SHOOTING ON MEDHA MICRO PROCESSOR LOCOS
Sl no
Case Probable causes Action to be taken
1 Engine not cranking
1Fuel pump motor not working Fuel oil pressure zero 2CK1CK2not picking up3Engine not cranking4Low water level
1 a Ensure MB1MB2and FPB breakers are in lsquoON rsquopositionb Ensure FPC contactor energizedc Ensure fuel pump motor is workingd Ensure fuel oil pressure buildup If not Check fuel oil system 2 a Keep ECS in idle positionb Ensure start button connections and operationc Ensure CKC is picking upd Ensure both control stand MU switches and keep in run positione Ensure CK1CK2 are picking up 3 a Ensure OSTA in tripped conditionb Ensure fuel rack control shaft connectionc Ensure LLOB in tripped condition4 a Ensure water level indication showing indicationb Ensure water level in the expansion tank
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
02
No Battery charging
1AGFB breaker is in OFFTripped 2MB1 breaker is in OFFTripped
1 Ensure AGFB breaker is in lsquoON position if tripped switch lsquoOFFrsquo and switch lsquoONrsquo AGFB breaker2Ensure MB1 breaker is in ON position if Tripped switch lsquoOFFrsquo and switch lsquoONrsquo MB1 breaker
03
Throttle not responding
1 DMR not picking up2 Control stand may be defective3 Defective Governor2 ECS is in idle position3COBERS breakers are OFFTripped4 Governor defective
1a Ensure MCB1MCB2 are in lsquoONrsquo position if Tripped switch rsquoOFFrsquo and switch lsquoONrsquob Ensure Brake pipe Pressure and it should be 5kgcm2c Ensure PCS connections and DMR energized2Try with other control stand3a Check Amphenol plug tightnessb Ensure PCS COC in open positionc Ensure the tightness of control drum couplers 2 Keep ECS in run position 3 Switch lsquoOFFrsquo and switch lsquoONrsquo ERS and COB breakers4 Check Am phenol plug tightness
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
04
Load meter not responding
1GF contactor not picking up
2Power ontactors not picking up
3 Rectifier Blower motor not working condition4 No flash from GF contactor
5 Power circuit ground
1 a Ensure PCR is in energized conditionb Ensure ECS is in run positionc Ensure GFB breaker in lsquoONrsquo positiond Ensure both control stands GF switches are in lsquoONrsquo positione Ensure BKT is in motoring positionf Ensure REV is in forwardreverse direction2 a Ensure control air pressure is 5kgcm2if not check N1 reducing valve COC it should be in open positionb Check power contactors air pipes for any leakages3 a Ensure RBB breaker is in lsquoONrsquo positionb Ensure rectifier Blower motor working condition4 a Check Traction Alternator carbon Brushes and slip ring conditionb Check Exciter Generator connection and carbon brushes conditionc Check power Rectifier cables condition and any abnormalities5 a Open GR seal and clear the section GR seal available on back side panelb Contact shed for advise
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
05
Engine come to IDLE
1 PCR (DMR) not picking up2Control stand my be defective3 ERS breaker tripped4Defective Governor5Cold engine6If ldquoGDM RU is badrdquo fault logged
1 Ensure Brake pipe pressure and it should be 5kgcm2 Ensure PCR energized2Try with other control stand3Switch lsquoOFFrsquo and switch lsquoONrsquo ERS breaker4Check amphinal plug tightness5Wait up to lube oil temperature raises to 60 degree centigrade6Reset the fault as per resetting procedure pasted in the cab
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
06 Loco power reduced to 4th notch
1High temperature of water and lube oil2Hot diodes-Rectifier Blower breaker tripped or Rectifier Blower failed or breaker is in OFF position
1Chcek water temperature and Radiator fan working Switch on ERF breaker Ensure water level in expansion tank2Switch lsquoOFFrsquo and switch lsquoONrsquo RBB breaker and ensure rectifier blower is working
07 Loco power reducing
1Wheel slip due to pinion slipped2High temperature of water and lube oil
1Ensure Traction motors free rotation Isolate traction motor one by one2Ensure water level in expansion tank Check water temperature and radiator fan working Switch lsquoONrsquo ERF breaker if available
08 Wheel slip on traction motor-nolocked axle on traction motor-no
1Traction motor speed sensor may faulty2Traction motor may be defective
1Ensure Traction motor free rotation Isolate traction motor one by one
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
09 Loco shutting down with LLOB tripping(loco shutting down low oil pressure message on DID panel)
1Lube oil pressure may be less2LLOB button tripped in Governor3OSTA tripped4Governor oil less
1Check lube oil level and Lube oil pressure2Reset the LLOB button in Governor3Reset OSTA handle4Ensure Governor oil level
10 Loco shut down without any indication
1OSTA tripped2Fuel oil pressure less or zero3Governor oil less4 Any breaker tripped
1Reset OSTA handle2Check fuel pump motor working3Ensure Governor oil level4Switch lsquoOFFrsquo all breakers and switch lsquoONrsquo and crank the loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
11 VCD(vigilance control device) LED light lsquoONrsquo
1VCD LED light lsquoONrsquo2Hooter sound is coming3BP pressure drops to zero
1If not operates any one of the throttle handle or sand button or horn button or A9 handle up to 60 seconds VCD light will lsquoONrsquo Press VCD reset button or any of the above and ensure VCD light lsquoOFFrsquo2Press VCD reset button and ensure hooter sound lsquoOFFrsquo3Bring the throttle to idle Keep the reverser handle in neutral position press VCD reset button and hold it till BP pressure builds up or switch lsquoOFFrsquo VCD toggle switch Ensure BP pressure builds up
12 VCD (vigilance control device) is in lsquoOFFrsquo
1Warning Alerter disabled message will come on DID panel
1Nothing will affect the normal operation
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
ADVANTAGES OF MICROPROCESSOR
Switches Breakers and Operational procedures are same as conventional locomotive for easy handling to drivers
1 Very Low intervention by the driver during faultsTrouble shooting activities by driver is simplified
2 No reset of GR1 GR2 and GFOLRThese items are not available Reset procedure is simplified
3 No need to maintain Timings specified in yellow zone of Load MetermicroP automatically reduces the excitation to safe zone if timings are exceeded
4 No need to regulate dynamic brake high speedsmicroP automatically restricts the Load meter to safe zone based on the loco speed
5 No slackness of microP cards on run6 More than one traction motor can be isolated As against single Tr Motor
in conventional locos7 2S-2P mode of operation in case of any Trmotor isolation to provide
more starting torque As against direct parallel mode of operation in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
8 Automatic reduction of transition speed in case of any Tr Motor isolation for quick acceleration As against no transition in conventional loco
9 Automatic power limitation based on TMs isolated and mode of transition to safe guard Traction motors
10 Detailed fault indications with audio visual warnings to driver As against 10 to 15 LED indications
11No confusion to driver in case of wheel slip Only Mechanical wheel slip is indicated as wheel slip
12In case of locked axle system indicates clearly which wheel is locked Driver has to identify the locked axle as conventional locomotive
13Detailed LED indications on control unit to identify the wiring equipment faults No such facility in conventional loco
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