364 g Multilin Motor Protection • Enhanced Motor Overload Protection with Thermal Modeling • Simple configuration and system monitoring using EnerVista TM 239 Setup software • Reduced cost and commissioning time with Protection, Monitoring, and Control in a single device • Scalable protection with optional RTD inputs and advanced Motor Protection elements • Simplified testing and commissioning with built in simulation features • Field upgradable firmware and relay options • Easy access to system and relay information using Modbus RTU • Multiple groups of protection settings allows flexible protection for flexible systems • Small to Medium sized three phase AC induction and synchronous motors • Pumps, conveyors, compressors, fans, etc. • Status/current/temperature display • Fault diagnosis • Trending • Trip record, last 5 • Process control • Optional analog output Monitoring and Metering User Interface Protection and Control • Thermal Overload (15 selectable curves) - Trip and alarm, immediate current overload alarm • Phase short circuit • Mechanical jam • Thermal memory lockout • Single-Phasing /Current unbalance • Ground fault - trip and alarm • Overtemperature: via thermistor or optional RTD inputs • Undercurrent • Breaker Failure • Trip/alarm/auxiliary/service outputs • Multi-speed motor protection • Motor start supervision • 40 Character backlit display for easy viewing of settings and actual values • 6 Motor and relay status LED’s • Multiple programming keys to allow easy access to system values and relay settings FEATURES APPLICATIONS KEY BENEFITS 239 MOTOR PROTECTION SYSTEM Motor protection and management for small to medium size motors Communications • RS485 Serial Communications • Modbus RTU protocol EnerVista TM Software • State of the art software for configuration and commissioning GE Multilin products • Document and software archiving toolset to ensure reference material and device utilities are up-to-date • EnerVista TM Integrator providing easy integration of data in the 239 into new or existing monitoring and control systems
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Protection and ControlThe239isadigitalmotorprotectionsystemdesignedfor threephaseACmotorsandassociated mechanical equipment .Advancedprotectionfeaturesinclude:
thermal overload
This function calculates the thermalcapacity used by the motor duringdifferent stages of themotor operation.Thevalue isupdatedbasedonthetime-currentoverloadcharacteristicsand themotoroverloadlockouttimesetpoints.
Motor starting
Duringacceleration,themotorisprotectedbyanI2tovercurrentcurvewhichpassesthrough the setpoints “Locked RotorCurrent” and cold “Safe Stall Time.” Therunningoverloadcurveisnotactiveduringacceleration,thereforeprovidingstartingprotection independent of runningprotection.
Motor running
To protect the motor against overloadswhile it is running, select one of 15different curves to accurately matchthe motor overload characteristic.Curves automatically adjust for hotmotor compensation to ensure correctthermalmodeling. For somenon-typicalapplications,therelaycanbeorderedwithadditionalcustomprogrammableoverloadcurves,allowingtheusertoconstructtheprecise curve thatmatches the thermalcharacteristics of the protected motor(MOD506).A user-programmable overload lockouttime controls the motor cooling rate. If
theprocesscriteriarequireshortercoolingperiods, particularly for small motors, adifferenttimecanbeused.The minimum level of thermal capacitythattherelaywillcalculateundernormaloperationwillbedeterminedbytheHot/Cold stall time ratio, which distinguishesbetweencoldandhotmotorconditions.AnAutoResetfeatureresetstheoverloadtriponcethethermalcapacityhasdecreasedto15%orless.An immediate overload alarm alertsthe operator. This may be useful forsystemsthatdonotnormallyexperienceoverloads.
An immediate overload pickup setpointis also available. The relay can also beorderedwiththeoptiontoallowtherelaytolearnthethermalcapacityusedduringsuccessfulstarts.
Hot Motor
Thisfunctionutilizesthermalcapacityused(TCU) value to initiateahotmotoralarmwhen the TCU is approaching themotorthermallimit(100%TCU).
Immediate overload alarm
Thisfunctionisusedtoalarmonamotoroverload condition that requires an
immediate intervention to eliminate thecauseofthesuddenoverload.
Phase short Circuit
Thiselementprovidescompletephase-to-phase and Phase-to-ground protection.TriporAuxiliarycontactscanbeselectedtooperateinstantaneously,orwithatimedelayupto60seconds.
Mechanical Jam
This function prevents motor damageduring abnormal operational conditions.Quick motor shut down can reducedamage to gears, bearings, and othermechanical parts associated with thedrivesystem. Acurrentsurgewillcausetherelayassignedtothemechanicaljamprotection to become active. The usermaysetthepickuplevel,timedelay,andinhibits.
Undercurrent
This function is typicallyused toprotectpumps from loss of suction, fans fromlossofairflowduetoacloseddamper,orconveyorsystemsfromabrokenbelt .Thisfunctioncanbeusedasanalarmorasatrip,ordisabledifnotrequired.Alternativelythisfeaturecanbeusedasapre-overloadwarning by setting the undercurrentpickup above the normal operatingcurrent but below the rated full loadcurrent.
single-Phase (Unbalance)
Currentunbalance is another significantcontributor to motor overheating. Theunbalance protection function has anunbalance pickup level and time delaythatcantriggeratriporanalarm.Typicalpickup is intended to detect and clearsinglephasing.Use thealarm level asawarningforsystemvoltageunbalance.
Agingandthermalcyclingcancausethestatorinsulationtobreakdown,resultingin ground faults. Ground faults can alsooccurinmotorsbecauseofenvironmentalconditionssuchasmoistureorconductive
15CURVE
1297
4
3
2
1
10
819765A8.cdr
PHASE CURRENT(multiples of full load)
1Full LoadSetpoint
239 OVERLOAD CURVES
0.1
10,000
1,000
100
TR
IPT
IME
(sec
on
ds)
10
1
Trip time overload curves, data and formulae are provided for protection and co-ordination.
MOTOR CURRENT
SEPARATE START AND RUN PROTECTION
TR
IPT
IME
(sec
)
SAFESTALL
TIME
RUNCURVE
STARTCURVE
LOCKEDROTOR CURRENT
x1FLC
819769A5.cdr
Separate start and run modeling provides optimum rotor and stator protection.
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dust.The239cantriggeratriporanalarmif the ground pickup level is exceeded.A time delay may be entered for timecoordinationofsystemswithseverallevelsofgroundfaultdetection. Therearetwogroundinputsavailableinthe239,allowingtwomethodsofgroundprotection.
WhentheresidualconnectionofthephaseCTs is used to detect ground currents,nuisancetripscanoccurduringstartdueto unequal saturation of CTs. This maycauseZerosequencecurrentstoappear,ofsufficientmagnitudetoreachthepickupsetting of the Ground Fault protectionfunction. Toavoid this, the239has twoindependent timedelaysettings,one formotorstarting,andoneformotorrunning.The239canbeorderedwithMOD512for1AgroundcurrentinputandMOD509fordirectiongroundfaultsensing.
overheating
Direct temperature sensing isnecessarytodetecttheeffectsofmotoroverheatingdue to blocked ventilation or highambient temperature. Temperaturerise under these types of conditions isusuallyslowenoughtoallowtheaccuratesensingoftheactualmotortemperature.Amotortemperatureinputforathermistorisstandardonthe239.Additionally,threeRTDslocatedinthestatorand/orbearingscanbeconnectedtothe239withtheRTDtemperaturesensingoption.Thisprovidesdisplayedtemperaturesaswellasalarmand trip settings for both bearing andstatorRTDs.FourRTDtypesaresupported:100Pt , 120Ni, 100Ni, and 10Cu. A RTDfailurealarmisalsoprovided.
Monitoring and MeteringThe 239 provides users with advancedmonitoring andmetering functions thatinclude:
Metering
Measuredvaluesinclude:
• Phasecurrent
• Groundcurrent
• Currentunbalance
• Current%offullload
• Motorloadcurrentasa%offullload
• Motorthermalcapacityused
• Statortemperature(RTDoption)
• Bearingtemperature(RTDoption)
Multi-speed Motors
Optional switches allow alternateparameterstobeactivatedforprotectionofmulti-speedmotors.Additionalsettingsprovided with multiple speed motorprotectioninclude:
• PhaseCTprimary
• Fullloadcurrent
• Overloadcurve
• Shortcircuittripsettings
Motor start supervision (MoD 505)
The239relaycanbe furnishedwith thisfunction,whichisanenhancedprotectionagainst multiple starts. The functionconsistof2elements:
The239keepsarecordofthecauseofthelast five trips issued. The relaywill alsorecordthephasecurrent,groundcurrent,and RTD temperaturesmeasured at thetimeofthelasttrip.
Motor alarmingAlarm functions include immediateoverloadwarning,unbalance,undercurrentand internal self check fault . Often analarmcanbegeneratedsoonenoughtoenablecorrectiveactiontobetakenbeforeatripoccurs.
testing
While periodic calibration is notrequired,thePICKUPLEDisusefulduringcommissioning or routine verificationto indicate the pickup point for phaseoverload or ground. A simulation modeis also available that enables simulatedcurrentstobeusedwithouttheneedforarelaytestset.Thisisidealforverificationofsettingsand training. Itallows forcingofoutputrelays,LEDs,switchinputs,RTD,Thermistor input resistance, and Analogoutputs.
automation
analog output option
The analog output option provides anisolated0to1,0to20,or4to20mAsignalforinterfacetoaPLC.Thisoutputcanbeprogrammedas:averagephasecurrent ,motorfullload%,thermalcapacityused,or RTD temperature. For local operatormonitoring, a thermal capacity metercanbeusedwiththisoutput.Informationsuchasprocessloadingandproximitytotrippingor overheating canbeobtainedwiththisoutput.
output relays
The239hasthreeoutputrelays.Theyarethe Trip, Alarm, and Aux contacts. Thetriprelayactsasthemainlatchedoutputrelay.The Alarm and Auxiliary relays may beprogrammed for latched or unlatchedmodes. All relays may be programmedfail-safeornonfail-safe. Ifconfiguredaslatched relays, they canbe reset via anexternalresetswitchconnectedtooneofthe239digitalinputs,fromthekeypadorviaserialcommunication.
switch Inputs
The 239 has three fixed and two userdefinableswitchinputs:
CommunicationsThe 239 features an RS485 connectionwithModBus®RTUprotocoltocommunicatewithmosttypesofPLCsandcomputers.This allows anymonitored value, status
Use Viewpoint monitoring to receive instant feedback of the motor and relay status
Troubleshoot motor faults using the 239 Cause Of Last Trip record
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and setpoints to be remotely accessedbyaPLCorSCADAsystem.AfrontpanelLED verifies correct operation of thecommunicationport.The 239 is also capable of beingintegrated into a local area networkusing the MultinetTM Serial to Ethernetconverter.Networkingallowseasyaccessto information frommultiplemonitoringandcontroldevicessuchasSCADA’sandHMI’s.
User InterfaceThe40characterLCDandkeypadprovideconvenient local communications andcontrol.Setpointscanbemodifiedlocallyusing the keypad and display. To helpprevent unauthorized setpoint changes,asetpointaccess inputmustbeshortedbeforechangescanbemade.
leD Indicators
Six LED indicators on the front panelprovidequickvisualindicationofstatus.
enerVistatM softwareTheEnerVista™Suiteisanindustryleadingsetofsoftwareprogramsthatwillsimplifyeveryaspectofusingthe239relay.Toolstomonitorthestatusofyourmotor,maintainyour relay, and integrate informationmeasuredbythe239 intoHMIorSCADAmonitoringsystemsareavailable.
enerVista™ launchpad
EnerVista™ Launchpad is a powerfulsoftwarepackagethatprovidesuserswithallofthesetupandsupporttoolsneeded for configuring andmaintainingGE Multilin products. Launchpad allowsconfiguringdevicesinreal-timebycommunicatingusingserial,Ethernet ,ormodemconnections,orofflinebycreatingsettingfilestobesenttodevicesatalater
time.IncludedinLaunchpadisadocumentarchivingandmanagement system thatensurescriticaldocumentationisup-to-dateandavailablewhenneeded.Documentsmadeavailableinclude:
•Manuals
•ApplicationNotes
•GuideformSpecifications
•Brochures
•WiringDiagrams
•FAQ’s
•ServiceBulletins
Viewpoint Monitoring
Viewpoint Monitoring is a powerful yetsimple-to-use monitoring and datarecording of small systems. ViewpointMonitoring provides a complete HMIpackagewiththefollowingfunctionality:
GROUND CT INPUT5 A or 50:0.025 CT input for residually connected phase CTs or separate core balance CT.
AC/DC CONTROL POWERUniversal control power 90-300 VDC/70-265 VAC.
TEMPERATURE SENSINGNTC or PTC thermistor input.
OPTIONAL ANALOG OUTPUTSelect output as: thermal capacity used, current as a % of full load, average current, RTD 1 Ð 3 temperature. Isolated 4 Ð 20 mA for PLC process input or 0 Ð 1 mA for thermal capacity meter.
COMMUNICATIONSRS485 serial communications, 1200 Ð 19200 baud for remote monitoring, setpoint programming, and commands. Modbus¨ RTU protocol.
OPTIONAL 3 RTD INPUTSMix RTD types. Separate stator and bearing monitoring.
OPTIONAL DIRECTIONAL GROUND SENSINGPolarizing voltage input for directional ground sensing(MOD 509)
standard unit.
User Interface
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typical Wiring
2 CT CONNECTION(NO GROUND)
RESIDUAL GROUND CONNECTION
ZERO SEQUENCE GROUND CONNECTION
PHASE A CT PHASE A CT
PHASE A CTSTARTER
80-300 VDC70-265 VAC 50/60 Hz
CONTROL POWER
SUPPLY 50:0.025GROUND CT
CONTACTORCOIL
SWITCHGEARGROUND BUS
PHASE C CT PHASE C CT
PHASE C CT
PHASE B CT
PHASE B CT
L1 L1
L1L1A
B
C
TWISTLEADS
L2 L2
L2L2MOTOR
L3 L3
L3L3
1 1
1
2 2
2
3 3
3
4 4
4
5 5
5
6 6
6
7 7
7
8 8
8
9 9
9
10 10
10
11 11
11
12 12
12
5A 5A
5A
5A 5A
5A
5A 5A
5A
5A 5A
5A
1A 1A
1A
1A 1A
1A
1A 1A
1A
COM COM
COM
COM COM
COM
COM COM
COM
COM COM
COM
PHASE A PHASE A
PHASE A
PHASE B PHASE B
PHASE B
PHASE C PHASE C
PHASE C
GROUND GROUND
GROUND
50:0.025 50:0.025
50:0.025
CONTROLPOWERN L
START STOP
GENERAL ALARM
CONTROLPOWER
232425
NO
NO
NO
NO
IN
IN
IN
IN
IN
COM
COM
COM
COM
COM
COM
COM
COM
COM
NC
NC
NC
NC
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43384439454046414742
SETPOINTACCESS
ACCESSKEY SWITCH
EMERGENCYRESTART
EMERGENCYRESTART
EXTERNALRESET
EXTERNALRESET
OPTION 1OPTION 1
OPTION 2OPTION 2
S1
S2
S3
S4
S5
SW
ITC
H IN
PU
TS
OU
TP
UT
RE
LAY
S
RELAY #1TRIP
RELAY #2ALARM
RELAY #3AUXILIARY
RELAY #4SERVICE
CURRENT INPUTS
13 14 36 37SAFETY
GROUNDFILTER
GROUNDL
+N
-
RS485 +
RS485 -
485 GROUNDSE
RIA
L
RT
D#1
RT
D#2
RT
D#3
RT
D T
EM
PE
RA
TU
RE
SE
NS
ING
AN
ALO
GO
UT
0-1m
A
4-20
mA
151617
181920SHIELD
USE SHIELDED TWISTEDPAIR WIRE
RS485
THERMALCAPACITY
THERMISTORIN+
COM
2122
4849505152
SHIELD
HOT
COMP
RET
HOT
5354555657
COMP
RET
HOT
COMP
RET
STATORTHERMISTOR
STATORRTD
STATOR/BEARING RTD
STATOR/BEARING RTD
USE SHIELDED WIRE
819829B7.cdr819751B5.DWG
NOTES:
1) 3)
4)2)
RELAY CONTACT STATE SHOWN WITHCONTROL POWER NOT APPLIED.
SHIELD TERMINALS ARE INTERNALLYCONNECTED TO SAFETY GROUNDTERMINAL 13
programmableInstantaneous: 20–45ms*total delay: Instantaneous+intentional*trip time accuracy guaranteed if current >1.4 x trip level setting BreaKer FaIlUre tIMInGDelay: INST.or10msto60000ms
programmableInstantaneous: 20–45ms*total delay: Instantaneous+intentional*trip time accuracy guaranteed if current >1.4 x trip level settingstart ProteCtIonthermal: Separatestartandrun