N02 Chandrashekar Shriyan 27-10-2006 WHY THE SAME DOCUMENT IS SUBMITTED WITH DIFFERENT DOCUMENT Nos.?
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N02
Chandrashekar Shriyan 27-10-2006
WHY THE SAME DOCUMENT IS SUBMITTED WITH DIFFERENT DOCUMENT Nos.?
s
Air Insu lated
M etal-Clad Sing le Busbar
M edium Volt age Sw it chgear
Type 8BK80On w ithdrawable circuit -breaker t ruck upto 24 kV
Operat ion and Maint enance
Inst ruct ions
PLEASE REFER DOC. No. 25194-JGZ-ES0L01-MA-000-B02-0001 FOR COMMENTS
2
Table of ContentsPage Nos
1. Techn ical Descript ion
1.1 General 3
1.1.1 Applicat ion 3
1.1.2 Specif ic Standards 3
1.1.3 Ambient Temperature and Hum idity 3
1.1.4 Site Alt itude 3
1.2 Design Features 5
1.2.1 Sw itchgear Layout 5
1.2.2 Circuit Breaker Compartment 5
1.2.2.1 Service Posit ion 6
1.2.2.2 Test Posit ion 6
1.2.2.3 Isolated Posit ion 7
1.2.2.4 Removed Posit ion 7
1.2.3 Busbar Compartment 7
1.2.4 Cable & CT Compartment 7
1.2.5 Compartment for Low Voltage Equipment 7
1.2.6 Accessory Items 7
1.2.7 Range of Panels 7
1.2.7.1 Feeder Panels 8
1.2.7.2 Bus Sect ionalizer Panel 8
1.2.7.3 Metering Panel 8
1.2.7.4 Panel w ith I/C & O/G Connect ions 8
1.2.8 General Construct ion 8
1.2.9 Interlocks 8
1.3 Technical Data 8
1.4 Rating Plate 9
2. Inst al lat ion
2.1 Foundat ion 10
2.2 Elect rical Service Room Dimensions 11
2.3 Transportation Units 11
2.4 Packing 13
2.5 Unloading 13
2.5.1 Handling Equipment Required 13
2.5.2 Procedure 13
2.6 Examining the Sw itchgear against damages 13
2.6.1 Storage 13
2.7 Transferring the Transport Units 13
2.7.1 Remove the t ruck f rom the panel 14
2.8 Assembling the Sw itchboard 14
2.8.1 Bolt ing the Panels together 14
2.8.2 Fixing the Sw itchboard to the Foundat ion 15
2.8.3 Bolt ing the Busbars together 15
2.8.4 Bolt ing the Main Earth Busbar
section together 15
2.9 Making HV Cable Connect ions 15
2.10 Earthing of Sw itchboard 16
2.11 Other Work to be carried out 16
2.11.1 Checking the HV Connect ion 16
2.11.2 Checking the bolted Joints 16
2.11.3 Cleaning the Sw itchboard 16
2.11.4 Insert ing the w ithdrawable parts 17
2.11.5 Protecting the panels against Environmental
ef fects 17
2.12 Interpanel Wiring 17
3. Put t ing the Sw i tchgear in to Service
3.1 Test Operat ions 18
3.1.1 With Door Open 18
3.1.2 With Door Closed 18
3.2 Checking the Accessory Items 19
3.3 Revising the Circuit Diagram 19
3.4 Space Heaters 19
Page Nos
4. Operat ions
4.1 Withdrawable Truck 21
4.1.1 Posit ions of the w ithdrawable t ruck 21
4.1.2 Transferring the Withdrawable Part from the
test / disconnected posit ion manually 21
4.1.2.1 Normal Operat ions 21
4.1.3 Transferring the Withdrawable Part from
the Connected posit ion to the test /
disconnected posit ion manually 21
4.1.3.1 Normal Operat ions 21
4.1.3.2 Castell Key Operation (Opt ional) 22
4.1.4 Removing the LV Plug 22
4.1.5 Connect ing the LV Plug 22
4.2 Circuit Breaker Operat ing Mechanism 22
4.3 Circuit Breaker Operat ion 22
4.3.1 Charging the closing spring by hand 22
4.3.1.1 Breaker ON and OFF 22
4.3.1.2 Mechanically 22
4.3.1.3 Electrically 22
4.3.2 Sw itch ing State Indicat ion 23
4.4 Line PT w ith Drawout Fuse Mechanism 23
4.5 Earthing 23
4.5.1 Earthing of Busbars and Cables 23
4.5.1.1 Direct Earthing of Busbars w ith Conductors 23
4.5.1.2 Earthing of Cables w ith Conductors 23
4.5.1.3 Removing Earthing Connect ions 23
4.5.2 Earthing of Busbars / Cables w ith a
Drawout Truck 24
4.5.2.1 Disconnect ion of Earthing Drawout Truck 24
4.5.3 Earthing the Busbars / Cables w ith
Earth ing Sw itch 24
4.5.3.1 Earthing Busbars w ith Earth ing Sw itch 24
4.5.3.2 Earthing Cables w ith Earthing Sw itch 24
4.5.3.3 Disconnection of Earthing Sw itch 24
4.5.4 Earthing of Busbars or Cables w ith Truck 24
4.5.4.1 Earthing of Busbars w ith Bus Earthing Truck 24
4.5.4.2 Earthing of Cables w ith Cable Earth ing Truck 25
4.5.4.3 Link Type Earthing Truck 25
4.6 Breaker Compartment Door 25
4.6.1 To Open the Door 25
4.6.2 To Close The Door 25
4.7 Door to LV Compartment 25
4.7.1 To Open the Door 25
4.7.2 To Close the Door 25
5. Main t enance
5.1 Inspect ion Schedule 26
5.2 Cleaning 26
5.3 Lubricat ion 27
5.4 Replacement Parts 27
5.5 Defeating the Door Interlock of HV
Compartment 27
5.5.1 Drawout Unit in Connected Posit ion 27
5.5.2 Drawout Unit in Disconnected Posit ion 27
5.5.3 Restoring the Door Interlock 27
6. Disposal o f Product 28
7. Summary of Import an t Inst ruct ions 29
8. Addi t ional In fo rm at ion
8.1 Reference list of Items 30
8.2 Jointing Torque 31
3
1. Techn ical Descript ion
1.1 General
8BK80 metal clad sw itchgear is of .horizontal
isolat ion & horizontal drawout type suitable for easy
extension of sw itchgear in both direct ion for system
voltage upto 24kV. The sw itchgear is designed for
single busbar system & is fully compartmentalized.
The design incorporates the set of interlocks for safe
operat ion of sw itchgear.
1.1.1 Applicat ion
The sw itchgear is suitable for use as dist ribut ion unit
for sw itching load at substat ions of elect ric supply
companies as well as for power stat ions & industrial
plants.
1.1.2 Specif ic Standards
The metal clad metal enclosed sw itchgear has been
type tested as per all the requirements of IEC 60298
"Specif icat ion for Rat ing & test ing of insulat ion of
elect rical Sw itchboards & sw itchgear for AC Voltages
above 1 kV & conforms to the standards IS3427,
IS12729. The Sw itchgear is supplied in ready
assembled condit ion. The Sw itchgear can be installed
free standing.
1.1.3 Ambient Temperature and Hum id it y
Ambient temperature is understood as the
Warn ingTo Ensure Personnel & Product Safety
This equipment carrries hazardous voltages and
moving mechanical parts that shall be controlled
remotely.
Non observance of the safety inst ruct ions w ill
result in death and / or severe personnel injury or
damage to property & environment .
Only qualif ied personnel shall work on or around
this equipment af ter becoming thoroughly familiar
w ith all warnings, safety not ices and maintenance
procedures contained herein. The
components labeled w ith the
Danger Sign shall be removed only
af ter ensuring that the supply to the
live parts behind them is de-
energized & earthed.
Successful and safe operat ion of this equipment is
dependent on perfect planning of the system,
proper handling (t ransport, storage), installat ion,
operat ion and maintenance.
temperature of the air in the sw itchboard room .
At ambient temperatures below -5°C prevailing for a
longer period the sw itchboard room has to be heated.
The air temperature in the panels should alw ays be
about 5°C above the ambient temperature to avoid
condensat ion. (Sw itch on the heater against
condensat ion!)
The hum idity of upto 95% is perm issible.
If the t ruck-type sw itchboard is exposed to a hum id
climate and rapid temperature changes, the
sw itchboard room has to be heated.
1.1.4 Sit e Alt i t ude
The rated insulat ing capacity values (rated impulse
w ithstand voltage, rated power frequency w ithstand
voltage)1 ) specif ied for the equipment are, in
accordance w ith the provisions of IEC Publicat ion 71,
based on standard atmospheric condit ions (1013 h
Pa, 20°C and 11 g/m 3 water content). i.e. sea level.
The insulat ing capacity of an insulat ion in air
decreases w ith increasing alt itude as a result of
changes in the air density. Standards promulgated by
IEC and other disregard this decrease in insulat ing
capacity for alt itude of up to 1000 m, i.e. the
decrease of approximately 9% at t his alt itude is st il l
perm issible.
The standards provide no guideline for alt itudes of
more than 1000 m w ith respect to insulat ion rat ings;
they leave t his up to an agreement between
manufacturer and user.
Our own recommendat ion is as follows:
Since this method used for rat ing insulat ion up to
alt itudes of 1000 m has proved to be sat isfactory, it
should also be applied to higher alt itudes. The
alt itude correct ion factor a should therefore be based
on the insulat ing capacity at 1000 m , which is lower
by 9% (corresponding to 0.91 or 1/1.1) than the
capacity at sea level.
The follow ing expression thus applies for the
select ion of the equipment :
Fig 1: Basic Circuit Diagram
4
Rated w ithstand voltage to be selected2)
Required w ithstand voltage2)
1,1 · a
Exam ple:
Site alt itude above sea level .......................... 3000 m
Required impulse w ithstand voltage .................. 75 kV
Correct ion factor a .............................................. 0 ,73
(according to Fig. 1.1)
Rated impulse w ithstand 75 kV
voltage to be selected= 93 kV
1.1 x 0.73
Sw itchgear w ith rated voltage of 15 kV, IEC List 2
(rated lightning impulse w ithstand voltage of 95 kV)
meets this requirement.
The actual insulat ing capacity at the site is then
w ithstand voltage 3) = a · rated w ithstand volt age2 ) of
the selected sw itchgear unit .
2.1. Circuit Breaker compartment (HV Compartment)
2.2. Busbar compartment
2.3. Cable & CT compartment
Fig 2: Side view of sw itchgear cubicle
2.3
2.2
2.1
2.4
2.5
Fig. 1.1 Relat ionship between the correct ion factor "a" and
the site alt itude
The follow ing def init ions apply:1 ) Rated w ithstand volt age2 ) = required value corresponding to
the provisions of IEC etc. for sea level.
Withstand voltage3 ) = actual value for the given alt itude2 ) Rated lightning impulse w ithstand voltage
Rated power f requency w ithstand voltage3 ) Lightning impulse w ithstand voltage
Power f requency w ithstand volt age
2.4. Low Voltage compartment (LV Compartment)
2.5. Withdrawable Truck
5
3.1. Vacuum Interrupter
3.2. Insulat ing Sw itching Rod
3.3. LV Plug on the truck
3.4. Contact Arm
3.5. Truck Handle
3.6. Cast Resin Insulator
3.7. Guide Roller on truck
3.8. PP Tube
Fig 3 : Withdrawable Truck w ith Circuit Breaker
3.1.1 Pole Flange (Upper)
3.1.2 Pole Flange (Lower)
3.1.3 PT's on the t ruck
Fig. 3.1: Rear View of the truck
3.1.1
3.1.2
3.1.3
3.13.2
3.3
3.4
3.5
3.6
3.8
1.2 Design Feat ures
1.2.1 Sw itchgear layout (Refer Fig . 2)
Metal part it ions subdivide each panel into
- Circuit breaker compartment (2.1)
- Cable & CT compartment (2.3)
- Busbar compartment (2.2)
- Low voltage compartment (2.4)
- Withdrawable Truck (2.5)
The outside covers are bolted to the f rame and the
doors are hinged.
1.2.2 Circu it breaker Compartm en t
The circuit breaker compartment contains a
w ithdraw able truck w ith Vacuum circuit breaker or
Bus PT Truck. The breaker term inals are f it ted w ith
contact arms (3.4, Fig 3)
The w ithdrawable truck can be t ransferred between
the service & test posit ions behind closed doors using
a hand crank.
3.2.1 Mechanical ON' Push But ton
3.2.2 Mechanical OFF' Push Button
3.2.3 Spring Charging Opening
3.2.4 Spring Charge Indicat ion
3.2.5 Mechanical ON' & OFF' indication
3.2.6 Mechanical Operat ions Counter
3.2.7 Earthing for the Truck
Fig 3.2: Mechanical ON & OFF Push But tons
3.2.1
3.2.2
3.2.3
3.2.4
3.2.5
3.2.6
3.2.7
3.7
6
1.2.2.1 Service Posit ion (Connected Posit ion )
The posit ion of a Withdrawable Truck in which it is
fully connected for its intended funct ion. In th is
posit ion of the t ruck, the contact arms of the circuit
breaker are connected to the busbars as well as to the
out going cables via the f ixed mounted isolat ing
contacts in the cubicle.
The t ruck is locked against w ithdraw ing.
The low voltage circuit is connected through the low
voltage plug & socket connect ion (3.3, Fig. 3 & 4.5,
Fig. 4).
1.2.2.2 Test Posi t ion
The posit ion of w ithdrawable t ruck in which an
isolat ing distance or segregat ion is established in the
main circuit & in which control circuits are connected.
In the test posit ion, the t ruck w ith the breaker is
w ithdraw n so far between busbars & outgoing cables
that there is isolat ing distance according to VDE 0670,
part 2 / 2.65. The truck is locked against moving. The
low voltage circuit is connected through low voltage
plug connect ion (4.5, Fig. 4).
The circuit breaker can be sw itched for test ing & all
funct ions.
6.1. Main Earth Busbar
6.2. Bushings for lower mat ing contact
6.3. Current t ransformer
6.4. Cable connect ing pieces
6.5. Wiring Cover
6.6. Gland Plate for Power Cables
Fig 6: Looking into Cable compartment
6.1
6.2 6.3 6.4
6.56.6
4.1. Door Locking h inge pin
4.2. Door close interlock
4.3. View ing w indow for truck
posit ion
4.4. View ing w indow for
Spring charge indicator
and Mechanical Counter
4.5. LV Socket
4.6. Drive Mechanism housing
4.7. Ramp
Fig 4: Withdraw able Truck in Test Posit ion & door open
4.8. Interlocking Plate
(Drive Box)
4.9. Holder for LV Plug
4.10. Clip for locking LV
Plug to Breaker
4.12. Trip mechanism for
operat ing the breaker
in service posit ion
4.13. Rod Lever
5.1. Bushings of upper mating
cont act
5.2. Cast resin insulator
5.3. Feeder connect ions
5.4. Busbars
Fig 5: Busbar Compartment
4.14.7
4.8
4.13
4.6
4.54.104.2
4.3
4.4
4.9
4.12
5.15.2
5.3
5.4
7
8.18.2 8.38.48.5
1.2.2.3 Disconnected Posit ion (Isolat ed Posit ion )
The posit ion of w ithdrawable t ruck in w hich an
isolat ing distance or segregat ion is established in t he
circuits of the w ithdraw able t ruck, the t ruck
remaining mechanically at tached to the enclosure.
In this posit ion the t ruck is w ithdraw n as in test
posit ion but the LV plug is disconnected.
In the test & disconnected posit ion the contact arms &
their mating contacts are separated by metallic
shut ters.
1.2.2.4 Removed Posi t ion
The posit ion of w ithdraw able t ruck when it is outside
the panel and electrically & mechanically separated
from it . Ramps are provided at the front bottom of the
panel to w it hdraw the truck out of the panel
smoothly.
Drive Mechanism of the t ruck is at tached to the
cubicle f rame using Rod Lever.
The Earthing st rip at the bottom of the breaker
compartment , along w ith the spring loaded pin
provided at the bottom of the circuit breaker t ruck
ensures the earthing of the t ruck in all the posit ions.
1.2.3 Busbar Compartm ent (Ref er Fig .5)
The busbar compartment contains:
- The busbars (5.4)
- Bushings w ith the mat ing contacts for the upper
contact arms (5.1)
- Feeder Connect ions (5.3)
The Main Busbars are mounted on cast resin
insulators (5.2). The ends of the smaller Main Busbars
are connected w ith the longer Busbar Links extending
from one panel to the next.
1.2.4 Cable and CT compartmen t (Ref er Fig .6)
The Cable compartment contains:
7.1 LV Compartment Door
Fig 7: Looking into LV compartment
8.1. Charging Handle
8.2. Cranking Handle
8.3. Double Bit Key
Fig 8: Accessories
7.1
- Bushings w ith the mating contacts for the lower
contact arms of t he w ithdrawable part (6.2)
- Cable terminat ion pieces (6.4)
- A sect ion of the main earth bar (6.1)
- Current t ransformers (6.3)
The cable term ination pieces are accessible f rom the
rear.
1.2.5 Compar tm en t for Low Volt age Equipment
(Refer Fig 7)
This compartment contains all the low voltage
devices (protect ive relays, MCB's, terminals, etc.,)
Indicators and relays are accommodated in door
cutouts.
1.2.6 Accessory It em (Refer Fig .8)
Follow ing accessories are supplied w ith the
sw itchgear.
- Changing handle for charging the closing spring of
the vacuum circuit breaker (8.1)
- Cranking handle for truck movement between
service and test posit ioning (8.2).
- Double bit key for locking the t ruck transfer
operat ing mechanism (8.3)
- Rod Trap key for LV compartment. (8.4)
- Earthing Sw itch Handle (Opt ional). (8.5)
1.2.7 Range of Panels
General:
For a metal clad enclosed sw itchgear there are
various panel modules available. All the panels are
constructed using ident ical parts as far as possible.
1.2.7.1 Feeder Panels (Fig 9a)
The feeder panels are suit able for input or output of
elect rical energy.
8.4. Rod Trap Key
8.5. Earthing Sw itch
Handle
8
panels are interchangeable.Trucks are earthed
w ith panel in both test & service posit ions.
- Outgoing cables can be earthed by means of
manually operated earthing sw itch. (Opt ional)
- C.T.s are mounted on stat ionery part in the Cable
Chamber.
- Line P.T.s are available w ith a drawout
arrangement and w ith fuses.
- Future extension of exist ing sw itchboard is
possible
1.2.9 In ter locks
The posit ions of the w ithdrawable part are described
on page 4
State The follow ing operat ions
are not possible
Withdrawable t ruck in - Removal of the
service posit ion, w ithdrawable t ruck
sw itching device "ON" - Opening of the door
- Pulling of the LV plug
Withdrawable t ruck in - Removal of the
service posit ion, w ithdrawable t ruck
sw itching device "OFF" - Opening of the door
- Pulling of the LV Plug
Withdrawable t ruck - Closing of the
located between the sw itching device
service and test - Opening of the door
posit ions - Pulling of the LV plug
Withdrawable truck in - Transfer of the
test posit ion, sw itching w ithdrawable t ruck
device "ON" to service posit ion
Withdrawable t ruck in - Closing of the door
disconnected posit ion transfer of the
LV plug pulled of f , w ithdrawable t ruck
sw itching device "OFF", to service posit ion.
door open
1.3 Techn ical Data
Rated Voltage, Frequency (50Hz) 7.2kV 12kV 24kV
Rated Current of the Feeders 3150A 3150A 3150A
Rated Current of the Busbar 4000A 4000A 3150A
Rated Power Frequency 20kV 28kV/ 50kV
withstand Voltage (rms) 60 sec. 38kV* *
Rated Lighting Impulse 60kV 75kV/ 125kV
Withstand Voltage (peak) 95kV* *
1.2/50 Micro sec.
Rated short circuit 44kA 44kA 26.3kA
breaking current
Rated short time withstand 44kA 44kA 26.3kA
current (3 sec)
Rated short circuit 110kA 110kA 66kA
making current (peak)
* * On request upto 31.5 kA
Outgoing feeder panels w ith C.B. on the truck are
most f requent ly used.
Alternat ively, these panels can also be equipped w ith
an isolat ing t ruck.
The panel is available w ith current t ransformer either
w ith earthing sw itch or w ithout earthing sw itch. The
earthing sw itch is always equipped w ith manual
drive.
1.2.7.2 Bus Sect ional izer Panels (Fig 9b)
In bus sect ionalizing panel one panel is used for the
truck w ith the C.B. (alternat ively, an isolat ing t ruck) &
one panel for connection of busbars to the top. Both
the panels are usually delivered as one assembled
transport unit .
1.2.7.3 Meter ing Panel (Fig 9c)
Basically metering panels are of the same
construct ion as the standard outgoing panels. The
metering truck w ith voltage t ransformers & HRC fuses
in series is equipped w ith 3 top contact arms.
1.2.7.4 Panel w ith I/C & O/G Connect ions (Fig 9d)
These panels are comprising of Incom ing & Outgoing
Cables in the same panel.
1.2.8 General Const ruct ion
- Safety devices & interlocks are provided to avoid
any malfunct ioning. These devices protect the
operat ing personnel & ensure reliable operat ions.
The interlocks are explained in sect ion 1.2.9.
- The panel is compartmentalized in dif ferent
compartments w ith metallic part it ions.
- Vacuum Circuit Breaker for the panel is mounted
on the t ruck. All the ident ical t rucks in dif ferent
Fig 9a Fig 9b
Fig 9c Fig 9d
I/C
VCB
CT
O/G
VCB
CT
VCB
CT
Fuses
P.T.
I/C
O/G
VCB
CT
9
Maximum values indicated
Overal l Panel w eigh t : Approx. w eight w ith vacuum
circuit breaker
15 kV (800W) 650 kg approx.
12 kV (600W) 450 kg approx.
24 kV (1000W) 800 kg approx.
Overal l Panel Dim ensions :
w h h1 d d1 d2 d3
mm mm mm mm mm mm mm
Upto 15 kV 600/800 1600 2000 1808 1750 380 750
24 kV 1000 1450 2300 2270 2215 380 1000
1.4 Rat ing Plat e
A Rat ing Plate containing the par t icular data is f ixed
inside each panel. The w ithdrawable vacuum breaker
has its own rat ing plate and the rated normal current
stated on it does not apply to the sw itchgear.
Degree of protect ion
Basic model IP 4X acc. To IEC 298 or
IP 40 acc. To IEC 529
The panels are gasketted to make them dust & verm in
proof.
IP 41, IP 5X and IP 51 can also be provided.
Fig 11: Rating Plate of a Panel
10.1. End Covers are f itted to the lef t & right hand end panels
of the sw itchboard
10.2. Pressure relief channel for the terminat ion
compartment , 110 mm deep.
10.3 Pressure Relief Flaps
† Minimum from highest pressure relief f lap
(Part 10.1) af ter it has opened
All dimensions are in mm and are for
the standard panel
* Single Row of Panels
* * Double Row of Panel
Fig: 10 Overall Panel Dimensions
750†
10.1
2020.0
800 min
on either side
800 min
W
10.2
d3
d2
10.3
d1
d
38
1100* / 2000* *
FRONT
h
10
2. Inst allat ion
The installat ion sequence should be planned and
prepared w ith care. Ensure that the erectors and the
operat ing personnel read the operat ion, installat ion &
maintenance inst ruct ions.
2.1 Foundat ion
- False Floor
Place a girder in the cutout common to several or all
of the sw itchboards so that it is parallel to the
operat ing f ront . The girder is meant to support the
panel bot tom rails below the 30mm x 30mm cutouts.
Two girders (depthw ise) must be f ixed along the
wheel tracks of the truck as shown in the foundat ion
plans (Fig. 12a, 12b & 12c).
- Concret e Floor
This should be provided w ith foundat ion rails on
which the panels are to rest. For f loor cutouts refer to
Fig 12a,12b &12c. The foundation should be
prepared before the panels arrive. Level dif ferences
between the mount ing surfaces of the individual
panels should be determ ined and compensated for by
using a sheet as shown in Fig 16.
Note : All dimensions are in mm
Fig.12a: Foundat ion Plan for 12 kV (600W) Panel
Note : All dimensions are in mm
Fig.12b Foundat ion Plan for 12 kV (800W) Panel
Note : All dimensions are in mm
Fig 12c : Foundation Plan for 24 kV (1000 W) Panel
450 450
800
1000
1215
32.5
65
75
75
Standard panel
Rear box
400
300
40
Front
1000
375 375 37.5
10 45
1140
777.5
300
45 10 221532.5
30 ø
Rear cover
65.0 670.0 65.0
65.020.0
25.0
310.0
1750.0
300.0
935.0
580.0
45.0
10.0
300.0
120.0
45.0
10.0
38.032.5
800.0
450.0175.0 175.0
H.T./L.T. Front door
65.0
Rear cover
65.0470.0
65.020.0
310.0
1750.0
300.0
935.0
580.0
10.0
45.0
300.0
120.0
45.0
10.0
38.032.5
175.0 250.0 175.0
600.0
H.T./L.T. Front door
CUTOUT FOR
POWER CABLES
CABLE CHAMBER
C.B. CHAMBER
CUTOUT FOR
CONTROL CABLES
6x holes for M12 bolts
(for fixing to foundat ion)
FRONT
CUTOUT FOR
POWER CABLES
CABLE CHAMBER
6x holes for M12 bolt s
(for f ixing to foundation)
CUTOUT FOR
CONTROL CABLES
C.B. CHAMBER
FRONT
198.0 198.0
Wheel Track
295.0 295.0
Wheel
Track
295.0 295.0
Wheel Track
11
- Base Frame (opt ional)
A solid base frame can be provided. The base f rame
gives a st rong support to the panels at their joining
line & also under it along the movement of the t ruck
w heels. It is made up of rolled steel sect ions.
A reference sketch of the base f rame is as shown in
Fig 13a, 13b & 13c
2.2 Elect rical Service Room Dim ensions
Min. Clearance to the ceiling 750 mm min
above the top (Refer Fig. 10)
Min.Clearance on the sides 800 mm m in
of the Panels
Min.Width of control aisle in 1100* /
front of the Panel for Single row 1500* * mm m in
Min.Width of control aisle 2000* /
in front of the Panel for 2500* * mm m in
two rows facing each other
* For upto 15 kV Panel * * For 24kV Panel
A power source must be available. Work likely to
produce dust or dir t may not be carried out while the
panels are being installed. The floor should be
levelled to enable transport units to be moved on
roller and/or sim ilar devices.
2.3 Transpor t Unit s
A transport unit consists of maximum upto 3
assembled sw itch cubicle w ith w ithdrawable t ruck.
The cubicle should not be lif ted f rom the top w ith
circuit breaker inside.
Fig 13a: Base Frame Dimensions (12 kV 600W)
Fig 13b: Base Frame Dimensions (12 kV 800 W)
Fig 13c: Base Frame Dimensions (24 kV 1000W)
40.040.0
75.0
75.0
1780.0
1705.0
1027.5
952.5
75.0
75.0
75.0
75.0
75.0
75.0
Ø14.0
Ø14.0
1780.0
Ø14.0
ISA 40x40x5
M12 NUT
WELDED
0.0
67.5
142.5
175.0
425.0
457.5
532.5
600.0
47.50.0
ISMC 75x40x5
T
O
P
40.040.0
75.0
75.0
1780.0
1705.0
1027.5
952.5
75.0
75.0
75.0
75.0
75.0
75.0
Ø14.0
Ø14.0
1780.0
ISA 40x40x5
M12 NUT
WELDED
0.0
67.5
142.5
175.0
625.0
657.5
732.5
800.0
47.5
ISMC 75x40x5
0.0
T
O
P
40.0
ISA 40x40x5
ISMC 75x40
75
1AØ
0
60
125
875
940
1000
12
Tolerance as p
er D
IN 43661:
Stra
ightness 1
mm. P
er 1
mtr. L
ength, 2
mm. F
or to
tal le
ngth
Level 1
mm w
ithin 1mtr.m
easured le
ngth.
Higher to
lerances a
re to
be compensated by la
ying sh
eets (b
elow panel)
Fig 1
4 : D
imension data sheet fo
r the fo
undatio
n.
In case fo
undatio
n ra
ils or fa
bric
ated channel fra
mes are embedded in
cement c
oncrete, c
are sh
ould be ta
ken to
leave open pockets below
the lo
catio
n of fix
ing holes of th
e panel fo
r tightening th
e fo
undatio
n bolts.
According t o DIN 43 661, DIN 7184 and DIN 18 202, sheet No. 3, the fo llow ing steps should be adhered to:
- For equalizat ion of all irregularit ies of the rough f loor, the screed to be applied to the f loor should be at least 10 mm higher than
the height of the foundat ion rails.
- Before applying the screed to the f loor, the foundat ion rails should be al igned, leveled and anchored to the rough f loor.
- The top edge of the foundat ion rai ls should be f lush w ith the upper surface of the f in ished floor, taking ceramic t iles, stone-
ware t iles or any other f loor coverings into account . The surface of the screed or of the f loor covering should not be h igher than
the level of the top edge of the foundat ion rails.
- The p lane def ined by the carrying surfaces of both (or several) parallel foundat ion rails has to be levelled in two d irect ions 90
degrees apart by means of a levelling instrument consist ing of two water f illed glass tubes connected by a rubber hose.
- The level tolerance, measured along a d istance of one meter, shall not exceed one m illimeter.
- The straightness to lerance shall not exceed one m illimeter per meter of length of the rails in both t he f lat and the edgew ise
posit ion of the rails.
- The top horizontal surfaces of the foundat ion rails shall be smooth (grind w elded joints smooth).
- Foundat ion rails embedded in concrete shall be fully grouted for their fu ll length and be able to support a load at any point .
The st raightness tolerances, as required by DIN
43 661 shall include the level tolerance and
shall nowhere in the complete plant to be
installed exceed 2 m illimeters.
t
U-channelreference surface
t
measuring surface
13
2.4 Pack ing
As required :
(a) For shipment to in land dest inat ions each transport
unit is f ixed on a sturdy wooden pallet and
covered by plast ic sheet for surface protect ion and
packed in normal wooden case.
(b) for shipment overseas each t ransport unit may be
addit ionally packed in a seaworthy case. It is
enclosed in plast ic sheet, w hich is sealed air-t ight
and includes bags containing dessicant .
Accessory items are packed separately, or kept in the
panel t ransport unit (see dispatch advice).
2 .5 Unloading
While unloading care must be taken to see that the
panels are not rolled on its sides & they must be kept
in upright condit ion.
2.5.1 Handling equipmen t requ ired
- A mobile crane or a chain pulley block for
unloading t he transport unit .
- Lif t ing tackle
- A fork-lif t t ruck w ith a fork length of about 3.0 m tr,
for handling the sw itchgear inside the building.
- Hydraulic jacks or w inches & roller pads.
The handling/transport gear must meet the site
requirements w ith regard to its construct ion and load
bearing capacity. Refer to the weights (for raising and
t ransport ing) stated on the transport or in the
covering documents.
2 .5.2 Procedure
- Do not unpack while unloading the t ransport
units. Take care not to damage the plast ic sheet
because it protects the sw itchgear against any
environmental ef fects.
- Use of mobile crane or a forklif t t ruck.
· At tach the ropes to the wooden pallet .
· Carefully raise the t ransport unit and check to see
that it is correct ly balanced, if necessary lower the
transport unit and correct any imbalance by
reposit ioning the ropes on the lif t ing tackle.
- Unloading the sw itchgear w ith a fork-lif t t ruck.
Transport units of not more than two panels can
be unloaded w ith a fork-lif t t ruck if the access
routes permit th is. Make sure the transport units
are correct ly balanced.
· Move the t ransport units as close as possible to
the sw itch house and put them down.
· Dismant le and remove the crates.
· Move each transport unit into the building.
· Take of f the plast ic sheet immediately prior to
bolt ing the t ransport units together and also
temporarily to check them for any signs of
t ransport damage.
2.6 Exam in ing the sw it chgear against
dam age
As soon as the sw itchgear has been unloaded and
unpacked examine it to see that it is complete w ith
reference to the relevant documents. Record any
damage and its cause w ithout delay, in the presence
of the forwarding insurance agent , if the damage was
caused en route.
This report is essent ial for any damage claims.
2.6.1 St orage
- Store the units in upright posit ion only
- The units must be stored in adequet ly covered
locat ion such that they are protected from Sun,
Rain, Flood Waters & other such Natural elements
2.7 Transfer ring t he t ranspor t un it s t o their
poin t s o f in stal lat ion
- Transfer the t ransport units including their wooden
pallets to the point of their installat ion using fork
lif t rollers.
- Withdraw the t rucks out of the panels using two
wooden wedges below the ramps & close the
door.
- Put the panels down on the cleaned site or at least
immediately in front of it in the correct order,
leaving a clearance of about 25 mm between
them .
- To remove the t ransport units from their wooden
pallets
- Place four w inches under the f loor rails of outer
panels and uniform ly raise the panel.
- Remove the wooden pallet .
- Lower the transport unit as far as it w ill go & place
it on two wooden beams if it is located above its
site or place on four roller pads if it is in f ront of
the sites
- In the later case roll the units to their mount ing
posit ion. If th is means changing the direct ion of
t ravel raise the unit & reposit ion the roller pads
accordingly. Now place the planks & channels in
the foundat ion cutouts that have to be crossed.
- To raise the panels on their mounting posit ion &
removing the roller pads
- Lower the t ransport unit as far as possible & place
them on two wooden beams.
- Now, raise the units, f irst on one side & then on
the other side, using roller-type crowbars. Pull out
the planks & lower the panels onto the cleaned
foundat ion. Posit ion the crowbars only at the
14
corners of the panels below the vert ical f rame
members.
2.7.1 To remove the Truck f rom t he Panel
- Open the door of the panel (Refer clause 4.6.1).
- Bring the t ruck to the test posit ion by cranking
(Refer clause 4.1.3.1)
- Disconnect the LV plug (4.5, Fig. 4) & place it its
holder (4.9, Fig. 4) on the door.
- Mark the t ruck & their panel numbers for
ident if icat ion.
- Lif t & turn the Levers (4.13, Fig. 4) on the f ront
interlocking plate (4.8, Fig. 4) by 90º
ant iclockw ise. (upto 15kV) OR
- Unscrew the f ront interlocking plate (for 24kV).
- Slow ly move the t ruck away from the panel. The
tw o ramps drop automat ically enabling free &
easy w ithdraw al of the t ruck.
- Put back the ramps to normal posit ion & close the
door.
2.8 Assem bling t he sw it chboard
Carry out the work described under clauses 2.7.1 and
2.8.1 to 2.8.4.
Keep the bolts loose, not fu lly t ightened, t ill all the
bolts for sect ions are in posit ion. Then t ighten the
joining bolts, followed by Busbar bolts, followed by
Foundat ion bolts.
2.8.1 Bolt ing t he panels together
It is assumed that the f irst t ransport unit is in its f inal
posit ion and that the other unit s are posit ioned on the
foundat ion rails in the correct order but w ith an
adequate clearance between them .
It is alw ays preferable to install the central panel f irst .
This pract ice should invariably be adopted for a board
w ith 20 or more panels. Af ter installing the central
panel, the other panels can be installed on it s lef t &
right in proper sequence.
· Procedu re
- Centrally align the f irst t ransport unit on its
foundat ion. The panels must be at the correct level
(refer Fig. 14) and be absolutely vert ical. If
necessary place shims.
- under the frame uprights and
- under the bot tom rails near the 30 mm x 30 mm
cutouts for the foundation bolts.
- Remove the bolts f it ted at the lef t hand end of
each panel, as viewed from the f ront.
- Move up the second panel.
- Align this second panel on the foundat ion, raise it
to the correct level and make sure the panels stand
vert ically.
Use shims as for the f irst panel.
- Using the nuts & bolts join the adjoining panels.
- Check to see w hether the panels are t ruly ver t ical.
If necessary slacken the screw s and seal the gaps
w ith rubber.
- Move up the other panels in sequence, align them
and bolt them together.
16.1. Breaker Compartment door
16.2. Upper metallic shut ter
16.3. Lower metallic shut ter
16.4. Heater
4.5 LV socket
Fig16: View into Circuit Breaker cubicle after removing the
drawout t ruck
Fig 15 : Procedure for bolt ing the panels together
16.1
16.2
16.3
16.4
4.5
15
2.8.2 Fix ing the Sw it chboards to the
Foundat ion
The panels bot tom plate has four 30 mm x 30 mm
cutouts (refer Fig 15) for f ixing purposes.
· Weld ing
Weld the bottom plate to the foundat ion at the
cutouts. Insert shims (refer clause 2.8.1) where
necessary to avoid having to weld across air gaps.
Coat the weld w ith enamel paint .
· Bo lt ing Dow n
Embed anchor-bolts in the foundat ion (through the
30 mm x 30 mm cutout ) or drill the appropriate holes
in the foundat ion rails (false f loor).
Insert shims between the foundation and the bottom
rails near the cutouts.
Tighten the screw w ithout distort ing the panels.
2.8.3 Bolt ing the Busbars together
Start working on the busbars only af ter panel units
have been adjusted correct ly and interconnected.
Access to the busbars are f rom the rear side or f rom
the top side by opening the Explosion Vents. All
necessary hardware is supplied on the the main
busbars.(5.4, Fig. 5)
1 . Brush the contact faces criss-cross w ise unt il
bright , & w ipe using a clean cloth. (applicable only
for bare Alum inium Busbars)
2. Square neck, round head, coach bolts are used for
busbar joints. These bolts do not rotate in their
slots & hence can be t ightened f rom one side.
Recommended torque is 70 Nm.
3 . Allow the joint to set t le down in 24 hrs & check
the value of the torque w ith the torque w rench.
4. The busbars of adjacent units must be joined
together using the busbars & hardw are supplied.
While insert ing coach bolts ensure that the round
head of coach bolt is facing sheet metal structural
parts. That means the nuts w ill alw ays be towards
the live parts such as busbars/feeder connect ions.
The busbars (5.4, f ig. 5) of the panel forming a
t ransport unit are already bolted.
5 . Refix the upper rear cover af ter the busbars are
bolted.
2.8 .4 Bol t ing t he Main Ear t h Bar sect ions
toget her
The main earth bars of the t ransport units must be
linked together. One of the two parts to be bolted
together is already f it ted w ith a link. This must be
undone, passed through the part it ion and bolted to
the two adjacent earth bar sect ions. The cover on the
side wall should be properly adjusted af ter joining the
earth bars.
2.9 Making HV Cable connect ions
The cable connect ion pieces are provided w ith Hex.
Headed bolts M16 w ith washers., spring washers &
5.1. Upper Contact Bushing
17.1. Fixed Contacts (Upper)
6.2. Lower Contact Bushing
17.2. Fixed Contacts (Lower)
17.3. Truck ear thing Srip
16.4. Space Heater
Fig 17: View into circuit breaker compartment w ith shutter
held open
6.1
18.218.1
6.6
6.1. Ear th Busbar
18.2. Eathing St r ip (from CB
chamber)
Fig 18: Earth Busbar Assembly
5.1
17.1
6.2
17.2
17.3
16.4
18.1. Extension Links
6.6. Bottom Covers
16
hex. Nuts for mount ing the cable lugs of the
conductors.
Three part bottom cable cover is supplied f itted w ith
the sw itchboard. Of these, the outer most cover has
to be removed & cutouts to be made of the size as
per the instruct ions given by cable kit manufacturer.
2.10 Eart h ing t he Sw itchboard
Connect the earth term inals of at least one or two
panels to the stat ion earth. This could be done to suit
the local guidelines. Terminat ion facility for earth
connect ion is provided on the earth busbar mounted
in the cable chamber.
2.11 Other work to be carr ied ou t
2.11.1 Checking the HV Connect ions
On all HV cables, check
- the bolts for t ightness
- the sealing and earthing
- the core spacing on three core cables and the ant i-
magnet ic clips on single-core cables.
2.11.2 Checking t he Bolted Jo in t s
- Check the power and auxiliary circuit connect ions
of the sw itching devices at random . Examine all
the terminal block connections, making sure that
the blocks are correct ly labeled and replace any
missing labels by referring to the circuit diagram.
- The torque values of all the busbar joints must be
checked
2.11.3 Cleaning t he Sw it chboard
- Clean all the post insulators, Bushings and Busbars
in all the compartments using sof t dry cloth.
Do not use any abrasive chem icals or detergen ts to
clean in stal led par t s.
Use on ly d ist i l led water i f necessary. Ensure that al l
par ts are dr ied up before applying any vo lt age.
16.2, 16.3. Shut ters
19.1. Shut ter operat ing rod
19.2. Roller Guide Angle
19.3. Truck guide
Fig 19: View inside circuit breaker compartment w ithout
w ithdrawable t ruck.
16.1. Breaker compartment Door
2.5. Breaker Truck
Fig 20: Insert ion of trolley in the panel
16.2
16.3
19.119.2 19.3
16.1 2.5
17
2.11.4 Inser t ing the w it hdraw able par t s
- open the front door (16.1, Fig. 20)
- put down the ramps (4.7, Fig. 4)
- place the breaker t ruck in front of the
corresponding panels.
- Transfer the t ruck inside the panel and push it as
far as it w ill go.
- Fix the racking mechanism / interlocking plate to
structure f rame by using lif t & turn levers
(upto 15kV) & by using bolts (for 24kV)
- Fix the ramps back in the posit ion
- Close the door (16.1, Fig 20)
- Inser t all other drawout t rucks in the same
manner.
2.11.5 Protect ing the panels against
env ironmen tal ef fect s
(a) Damaged sect ions of the paint f inish may only be
touched up w ith original paint.
(b) Fit the parts supplied to protect against the ingress
of rept iles. Check in case they are removed during
installat ion.
(c) Close all the doors & covers properly.
(d) Any opening that is lef t open af ter installat ion
should be closed & sealed to make it t ruly
verm inproof .
2.12 In terpanel Wir ing
The w ire have been lef t loose in the LV compartment
of certain panels.
These w ires must be connected from panel to panel
as per approved w iring diagrams.
18
3. Put t ing the sw itchgear in to serv ice
For details of operat ion refer sect ion 4
3.1 Test operat ions
3.1.1 Wi th door open
- The motor operat ing mechanism start as soon as
the LV plug is inserted and control supply is
available (If the VCB is not already charged)
- Open & close the breaker several t imes.
- Pull off the LV plug. Charge the breaker closing
spring by hand (refer clause 4.2)
- Operate the circuit breaker
- Refit the LV cable Plug.
3.1.2 With door closed
Each sw itchpanel should be tested as follows:
- Transfer the w ithdrawable truck to the
disconnected posit ion (see 4.1).
- Sw itch ON the auxiliary and control supply.
- Transfer the w ithdrawable part to the connected
posit ion.
4.3. View ing w indow for t ruck position
4.11. Opening for charging handle for charging the breaker
closing spring
4.12. Trip mechanism for operat ing the circuit breaker in the
connected posit ion .
7.1. LV compartment door
16.1. Breaker compartment door
21.2. ON & OFF Push But ton (On HT Door)
21.3. Window for the indicators of the w ithdrawable part
- Number of operat ions (Operat ion Counter)
- Closing Spring of the circuit breaker
- Charged - Lable w ith spring symbol
- Discharged - Blank Lable
- Indicator for circuit breaker sw itch ing status
- Circuit Breaker Closed - " I "
Tripped - " O "
21.4. Opening for Double Bit Key for locking the t ransfer
operat ing mechanism
21.5. Opening for racking handle for racking the breaker truck
21.6. Opening for defeat ing in terlock
21.7. Door Handle
Fig. 21: Opening Elements (upto 15kV Panel)
16.1
4.12
21.2
21.3
4.11
21.4
21.5
7.1
21.6 21.7
4.3
4.3. View ing w indow for truck posit ion
4.11. Opening for charging handle for charging the breaker
closing spring
4.12. Trip mechanism for operat ing the circuit breaker in the
connected posit ion.
7.1. LV compartment door
16.1. Breaker compartment door
21.1. Ball grip
21.2. ON & OFF Push But ton (On HT Door)
21.3. Window for the indicators of the w ithdrawable part
- Number of operat ions (Operat ion Counter)
- Closing Spring of the circuit breaker
- Charged - Lable w ith spring symbol
- Discharged - Blank Lable
- Indicator for circuit breaker sw itching status
- Circuit Breaker Closed - " I "
Tripped - " O "
21.4. Opening for Double Bit Key for locking the transfer
operat ing mechanism
21.5. Opening for racking handle for racking the breaker t ruck
21.6. Opening for defeat ing interlock
21.8. Bolts for door locking
Fig. 21a: Opening Elements (for 24kV Panel)
21.1
4.3
4.12
21.2 21.34.11
21.4
21.5
7.1
21.6
21.8
19
- Open and close the breaker as long as no high
voltage is applied.
- Without using force check all mechanical and
electromechanical interlocks for sat isfactory
funct ioning. Check to see whether the sw itching
states are indicated correct ly in the control room.
- Check whether the posit ion of the w ithdrawable
t ruck is indicated correct ly (if the appropriate
posit ion sw itches are f it ted refer to the circuit
d iagrams).
3 .2 Checking t he Accessory It em s
The accessory items required must be easily available
in the Sw itchgear Room or an adjacent room . They
include one Hand Crank for t ransferring the t ruck and
for charging the breaker closing spring, a Double Bit
Key for locking the hand-operat ing mechanism , the
basic circuit diagram , Operat ing Instruct ions, Castell
Lock Key (opt ional) and Earthing Sw itch Handle
(Opt ional)
The Hand Crank for t ransferring the t ruck is also
suitable for all M8 bolts.
3.3 Revising t he Circu it d iagrams
If circuits have to be modif ied during installat ion t he
exist ing circuit diagrams are marked up. When work
has been completed make sure that the original
diagrams are revised.
3.4 Space Heaters
For panels installed in hum id atmosphere, space
heaters are f itted in the circuit breaker & cable
compartments. The thermostat controlled heaters
should be sw itched "ON" before taking the panels into
service. The thermostat shall be set to cut of f supply
to heaters at about 5º higher than the maximum
ambient temperature.
Heaters must always be kept "ON" in all the condit ions
(even during maintenance)
20
s
BRIEF OPERATING INSTRUCTIONS FOR 8BK80 SWITCHGEAR
Fig 22 : Label on door of breaker compartment
FOR DETAILED DESCRIPTION OF ABOVE OPERATIONS &SPRING CHARGING OF CB,
OPENING OF DOOR, ETC.
REFER CLAUSE 4 OF THIS MANUAL FOR OPERATIONS
21
In detail:
- Make sure that the circuit breaker is open, the LV
plug(3.3, fig. 3) and socket connector has been
put together and lock it . The breaker compartment
door is closed.
- The castell key can be re,moved in this posit ion
also for any interlocked operat ions w hich are to be
performed w ith circuit breaker in open posit ion.
- Fit the hand crank (8.2, f ig. 8)to the hexagon
shank in opening (21.5, fig. 21) turn it clockw ise
as far as it w ill go and pull it of f.
- Insert the castell key if it was removed for
interlocked operat ions. Turn the key clockw ise
through 90 degrees f rom posit ion "Manual
Racking" to "Connected posit ion(locked)" and pull it
of f .
4.1.3 Transferr ing t he w ithdraw able par t f rom
the connected posit ion t o the test /
d isconnected posit ion m anually
4.1.3.1 Normal Operat ions
In brief
1st Step 2nd Step 3rd Step
Turn double-bit key Insert and Turn double-bit key
turn hand
crank
as far it w ill
f rom by to go and pull from by to
it of
90° 90°
Fig. 23b
In detail:
- Make sure that the circuit breaker is open.
- insert the double bit key in lock (21.4, f ig. 21) and
turn it ant i-clockw ise through 90 degrees f rom
"connected posit ion (locked)" to "Manual Racking".
The hexagon shank opening (21.5, f ig. 21).is now
accessible. The hand racking mechanism is
unlatched.
- Fit the hand crank (8.2, f ig 8) to the hexagonal
shank in opening (21.5, fig. 21) turn it ant i-
clockw ise as far as it w ill go and pull it of f .
- Turn the double-bit key anti-clockw ise through 90
degrees from the posit ion "Manual Racking" to
"Disconnected posit ion (locked)" and pull it of f .
Opening (21.5, f ig. 21) is now closed.
The hand racking mechanism is now locked.
4. Operat ions
Each row of cubicles is provided w ith brief operat ing
instruct ions. Refer to fig. 22.
4 .1 Withdraw able t ruck
4.1.1 Posit ions o f the w i thdraw able t ruck
Refer clause 1.2.2 for Circuit breaker Chamber
· Service posit ion (connected posit ion )
The circuit breaker is connected w ith the busbars and
the outgoing circuit Auxiliary circuit is connected
through LV plug and socket.
· Test posit ion
The circuit breaker is disconnected from the busbars
and the outgoing circuit . Segregat ion as specified in
IEC 60298 is maintained. The LV circuits are
connected through LV plug and socket .
Disconnected posit ion
The circuit breaker is disconnected from the busbars
and the outgoing circuit . LV circuits are disconnected
by pulling out the LV socket from the plug.
- When the LV plug and socket are connected the
follow ing funct ions can be carried out.
· The breaker can be tested / operated, also from
the control room.
· The breaker compartment door can be opened.
· Funct ions such as ON / OFF indicat ion and
elect rical interlocks can be tested.
- When the LV plug and socket are disconnected.
· The breaker compartment door cannot be
closed. Hence the truck cannot be inserted.
4.1.2 Transferr ing t he w ithdraw able par t f rom
the Test /Disconnected Posit ion m anually
4.1.2.1 Norm al operat ion
In brief :
1st Step 2nd Step 3rd Step
Turn double-bit key Insert and Turn double-bit key
turn hand
crank
as far it w ill
from by to go and pull from by to
it of
90° 90°
Fig. 23a
22
4.2 Circu it -breaker operat ing m echanism
The operat ing mechanism is of the stored energy
type. For elect rically operated breakers, motor
automat ically charges the closing spring af ter each
sw it ching operat ion. If the motor supply should fail
the closing spring can also be charged by hand. The
tripping spring is charged each t ime the breaker is
closed.
4.3 Circu it -breaker Operat ion
4.3.1 Charg ing t he closing spring by hand
· Procedu res
If the breaker compartment door
is closed (connected
posit ion) turn plate
(21.6, f ig. 21) so that it
clears opening (21.7,
f ig. 21) inser t the hand
crank and f it it into the
breaker
is open (disconnected
posit ion) f it the hand
crank direct ly to the
breaker operat ing
mechanism in opening
(21.7, f ig. 21).
· Operat ing M echan ism
- Turn the crank unt il t he symbol "spring charge"
appears in view ing w indow (21.3, f ig.21) on
indicator. The operator is not at risk if the motor
supply recovers,because the hand crank f ree-
wheels and detaches in the anti-clockw ise
direct ion.
- Pull the crank off .
4.3.1.1 Breaker ON and OFF
4.3.1.2 Mechan ical ly (locally by means of push
button)
· In the connected posit ion :
Trip mechanism (4.12, Fig. 4 & 21) as far as it w ill
go, hold it there, press but tons "ON" and "OFF"
(21.2, Fig 21) and then release the grip.
· In the disconnected posit ion w ith the door closed :
Press buttons "ON"and "OFF" (21.2, Fig 21) on the
breaker compartment door.
· In the disconnected posit ion w ith the door open :
Press buttons "ON"(4.14, Fig 4) and "OFF" (4.15,
Fig 4) on the breaker t ruck
4.3.1.3 Elect r i cal ly (f rom the control room or
locally)
by means of push but ton/sw itches in the control room
or on the LV compartment door. If the control supply
fails the breaker can always be t ripped mechanically
(see above)
4.1.3.2 Cast el l Key Operat ions (Opt ional)
1st Step 2nd Step 3rd Step
Turn castell key Trun castell key
as far it w ill
from by to go and pull f rom by to
it of
90° 90°
Fig. 23c
In detail:
- Make sure that the circuit breaker is open.
- Turn the castell key (which is trapped in the
mechanism ) ant i-clockw ise through 90º from
"Connected posit ion (locked)" to "Manual Racking".
- In th is posit ion the castell key can be removed for
any interlocked operat ions which are to be
performed w ith circuit breaker in open condit ion.
The hexagon shank opening(21.7,f ig.21)is now
accessible. The hand racking mechanism is
un latched.
- Fit the hand crank (8.2, f ig.8) to the hexagonal
shank in opening (21.5, f ig.21) turn it ant i-
clockw ise as far as it w ill go and pull it of f .
- Inser t t he castell key if it was removed for
interlocked operat ions. Turn the double-bit key
ant i-clockw ise through 90 degrees from the
posit ion "Manual Racking" to "Disconnected
Posit ion(locked)" and pull it of f .
- The castell key can also be removed in th is
posit ion to facilitate the opening of the HT
compartment door and / or other interlocked
operat ions.
4.1 .4 Disconnect ing the LV Plug
- Transfer the w ithdrawable part to the
disconnected posit ion(in accordance w ith clause
4.1.3) and lock it .
- Open the breaker compartment door (refer clause
4.6.1).
- Unlock the LV plug (3.3, f ig. 3) and LV socket (4.5,
f ig. 4 & 16) by turning down the clip.
- Pull of f the plug and at tach it to the holder (4.9,
f ig. 4) which is fixed to the door.
4.1.5 Connect ing t he LV Plug
- Put the LV plug (3.3, f ig.3) and LV socket (4.5,
f ig. 4 & 16) together and lock it w ith the clip.
- Close the breaker compartment door (refer clause
4.6.2).
23
4.3.2 Sw itch ing St ate Ind icat ion
In the m iddle part of view ing w indow (21.3, Fig 21)
O' means "OFF", I' means "ON".
DangerPrecau t ions for Safe Working
High Voltage !
Touching live parts w ill result in severe personnel
injury and / or death.
This equipment shall be operated only by qualif ied
personnel w ho have become thoroughly familiar
w ith the operat ing instruct ions manual and in
part icular all the safety inst ruct ions.
4 .5 Ear th ing
4.5.1 Eart h ing of Busbars and Cables
4.5.1.1 Direct Ear th ing of Busbars w i t h
conductors
- Sw itch of f all breakers feeding to the busbars.
- Open upper rear bolted cover & inside covers (of
busbar chamber). Touch all phases w ith an
earthing conductor mounted on the long
insulat ing pole.
- Shor t all the phases w ith a conductor and bolt it to
earth.
- Place necessary warning plates at all not iceable
locat ions.
4.5.1.2 Ear th ing o f Cables w it h conductors
- Sw itch of f the breaker in the panel where cable
earthing is desired.
- Ensure that the cables are not get t ing the supply
f rom the other end.
- Remove the lower rear cover of the cable chamber.
- Follow the procedure described for busbar
earthing.
4 .5.1.3 Rem oving Ear th ing Connect ions
- Disconnect and remove the short ing and earthing
conductors.
- Close the rear cover and bolt it f irm ly.
- Remove the warning plates.
24.1. Fixed Contacts (E sw itch)
24.2. Moving Contact (E sw itch)
24.3. Earthing Sw itch Shaf t
24.4. Operating Link
6.1. Earthing Busbar
Fig 24: Earth sw itch Arrangement on cable side
(Side view )
(Rear view )
6.1 24.3
24.1
24.224.4
24
4.5.2 Ear th ing o f Busbars or cab les w it h a
Draw out Truck
Separate drawout Trucks can be supplied opt ionally
for busbar and cable earthing. In case fault making
capacity is required, a circuit breaker is mounted on
such drawout trucks.
· Procedu re
- Remove the circuit breaker or the link drawout
t ruck f rom the panel where earthing is to be done
(refer clause 2.8.1)
- Insert the desired earthing drawout t ruck i.e. cable
or busbar earthing drawout t ruck in the panel
(refer clause 2.11.4)
- Connect the LV plug and socket (refer clause 4.1.5)
- Close the panel door (refer clause 4.5.2)
- Ensure that there is no voltage available on the
parts to be earthed when earthing drawout t ruck
w ithout making capacity is used.
- Transfer the drawout unit to the connected
posit ion (refer clause 4.1.3). In case the earht ing
drawout t ruck has an elect ro-mechanical interlock
unit mounted on it , the t ransfer is possible only
af ter all the interlocking condit ions are sat isfied.
- Lock it in the connected posit ion.
- In case the drawout t ruck has a circuit breaker
mounted on it sw itch "ON" (refer clause 4.2 & 4.3).
- Place the warning plates at all necessary locat ions.
4.5.2.1 Disconnect ion of Eart h ing Draw out t ru ck
- Sw itch "OFF" the breaker in case of earthing
drawout truck w ith making capacity (refer clause
4.3).
- Transfer it to the disconnected posit ion (refer
clause 4.1.3)
- Disconnect the LV plug (refer clause 4.1.4)
- Open the HT compartment door (refer clause
4.6.1)
- Remove warning plates.
- Inser t the original drawout t ruck of the circuit
breaker or l ink drawout truck in the panel (refer
clause 2.11.4)
- Connect the LV plug (refer clause 4.1.5)
- Close the door (refer clause 4.5.2)
- The original drawout truck is now ready for
t ransfer to connected posit ion.
4.5 .3 Ear th ing t he Busbars or Cables w ith
Ear th ing Sw it ch
4.5.3.1 Ear th ing t he Busbars w ith Ear t h ing
Sw it ches
- Sw itch of f the supply to the main busbars.
- Ensure that the supply to the main busbars cannot
be sw itched "ON" from remote points.
- In case the elect ro-magnet ic interlocks, ensure that
all the interlocking condit ions are sat isf ied.
Otherw ise the earthing sw itch cannot be closed.
- Close the ear thing sw itch by insert ing the earthing
sw itch handle in posit ion and turning it in the
clockw ise direct ion t ill stop. Withdraw the handle.
- Place the w arning plates at all necessary locat ions.
4.5 .3.2 Ear th ing Cables w ith Ear t h ing Sw it ch
(f ig .24)
- Move the t ruck to test / disconnected posit ion.
Earthing sw itch cannot be closed unt il this posit ion
is reached.
- Ensure that the cables cannot be energized from
the other end.
- Follow the procedure for Busbar earthing sw itch.
4.5 .3.3 Disconnect ion o f Ear t h ing Sw it ches
- Insert the earthing sw itch handle in posit ion. Turn
it in the ant i-clockw ise direct ion t ill stop. Withdraw
the handle.
- Remove warning plates f rom all the locat ions
4.5.4 Ear th ing t he Busbars or Cables w it h Truck
4.5.4.1 Ear th ing t he Busbars w it h Bus Ear t h ing
Truck
- Sw itch of f the supply to the main busbars.
- Ensure that the supply to the main busbars cannot
be sw itched "ON" from remote points.
- Rack ou the breaker to diconnected posit ion.
- Diengage the LV plug & socket.
- Drawout the nreaker t ruck completely out of the
panel.
- Insert the Bus earthing t ruck in the panel to
diconnected posit ion.
- Connect the LV plug to socket.
- Rack in t he truck to service posit ion.
- Place the w arning plates at all necessary locat ions.
25
4.5.4 .2 Ear th ing t he Cables w it h Cable Ear t h ing
Truck
- Move the t ruck to test / disconnected posit ion
- Ensure that the cables cannot be energized f rom
the other end.
- Follow the procedure for Busbar earthing sw itch.
4 .5 .4 .3 Link Type Eat h ing Truck
- Sw itch of f the supply to the main busbars.
- Ensure that the supply to the main busbars cannot
be sw itched "ON" f rom remote points.
- Ensure that the cables cannot be energized f rom
the other end.
- Follow the procedure for Busbar earthing sw itch.
4 .6 Breaker Compartment Door
The door can be opened & closed when the t ruck is in
the disconnected posit ion and the plug & socket
connector for LV cables has been connected together.
The door interlock can be defeated as described
under clause 5.5 below.
4.6.1 To open the door
- Rotate the handle ant i-clockw ise to open the door.
(For upto 15kV)
- Unscrew the door closing bolts of HT compartment
door. The bolts are capt ive (for 24kV Panel)
- Open the door.
4.6 .2 To close t he door
- Shut the door.
- Rotate the handle clockw ise t ill it gets closed. (For
upto 15kV)
- Tighten the capt ive screw in case of bolted door.
4 .7 Door to LV Compar tm en t
4.7.1 To open the door
- Rotate the turnlocks w ith a key in ant i-clockw ise
direct ion or unscrew the capt ive bolts in case of
bolted door.
- Open the door.
4.7 .2 To close t he door
- Shut the door.
- Rotate the turnlock in clockw ise direct ion or
t ighten the bolts in case of bolted door.
26
5. Main tenance
DangerPrecaut ions for Safe Work ing
Maintenance, repair and subsequent conversion or
extension work shall be carried out only by
specially trained personnel in accordance w ith the
operat ing instruct ions and/or special conversion
instruct ions. Training and informat ion sessions for
personnel w ill be provided by the competent
Siemens department .
Before start ing any w ork on the panels references
must be made to local regulat ions for high voltage
sw itchgear. Sw itch of f the power supply, close/
open the breaker manually to ensure that the
closing spring of t he breaker is discharged. Then
rack out the truck from service to test posit ion.
Control term inals in the LV compartment must not
be touched if the cont rol supply is not
disconnected.
Non observance w ill result in death and / or severe
personnel in jury or substantial damage to
proper ty.
5.1 Inspect ion Schedu le
- Each year
· Make a general visual check.
· Check whether the accessories are complete
and in proper order.
· Clean and lubricate the wheels as well as
moving parts of the truck and interlocking
plate.
· Relays to be tested for their funct ionality.
· Clean t he Panels (refer clause 5.2)
- Every f ive years
· Transfer the w ithdrawable t ruck to t he
disconnected posit ion.
· Test-operate the circuit-breakers.
· Remove the w ithdrawable t rucks (refer clause
2.7.1) and carry out all maintenance work, also
on the sw itching devices.
· Clean the panels (refer clause 5.2) and check
the connect ions.
· Lubricate all bearing surfaces, bearings and
art iculated jo ints.
· Reinsert the w ithdraw able t rucks.
· Check the sw itchpanel funct ions and put the
board back into service.
If work has to be carried out in the panels; isolate the
board, make sure that it cannot be made live again,
check its isolated state and earth and short-circuit the
feeders and where applicable, the busbars. Adhere to
all regulat ions and safety measures, maintain and
service the built -in equipment , e.g. circuit -breakers,
voltage t ransformers, current t ransformers, relays,
meters, protect ive devices, etc. in accordance w ith
their operat ing inst ruct ions.
Before removing the front plate of the breaker
operat ing mechanism discharge the closing and
tripping springs. Follow the instruct ions given on the
mechanism housing.
Only standard tools are required. Put the sw itchgear
back into service as described under clause 3 above.
Service t he sw itchgear at shor t er in tervals i f the ai r
is very moist or f u l l o f dust or is otherw ise
pol luted. The cause of any disturbance or short-
circuit must be determ ined immediately and
damaged parts replaced, irrespect ive of whether an
inspect ion is due or not.
5.2 Clean ing
Caut ionFor Safet y
For safety reasons, cleaning of panels shall be
taken up only when the shutdown of Main &
Auxilliary Power supply is taken, the breaker is in
the open state, closing spring of the breaker is
discharged & the breaker t ruck is removed out of
the panel.
Cleaning Agents
Perchlorethylene, 1.1.1 t richloroethane, small
brushes, dusters and vacuum cleaner for sheet metal
parts.
Note:
Trichlorethylene, perchloroethylene and
tetrachloroethylene have a harmful ef fect on cast
resin parts and must not come into contact w ith
them .
Cast resin parts should be cleaned w ith dist illed w ater
on ly.
Silver plated and other contact surfaces to be cleaned
w ith clean cloth.
27
5.3 Lubricat ion
Immediately af ter cleaning:
- Lubricate the isolat ing contacts and their mat ing
contacts w ith neutral grease.
- apply a film of neut ral grease to the bearings and
art iculated joints of the operat ing mechanisms, to
the w ithdrawable parts and shutters, and to the
door hinges and locks.
Recommended neutral greases are:
( i) SERVOGEM 2 (mult ipurpose) of Indian Oil
Corporat ion make
(ii) Mult ipurpose grease H' of Hindustan Petroleum
Ltd. make
(ii i) Any other chem ically neutral grease which can
w ithstand temperature up to 15° C.
5.4 Replacemen t Par t s
Items such as post insulators, bushings mating
contacts, measuring inst ruments, current
t ransformers etc., can be replaced. If replacement is
likely to prove dif f icult ask the nearest Siemens
representat ive in good t ime for deputat ion of suitable
personnel. The representat ive w ill also assist you in
deciding w hat spare parts to keep in stock.
When ordering spare parts and units give the
follow ing details:
- Type and Serial No. of the sw itchboard (see
nameplate).
- Exact descript ion of the unit or part , referring to
the appropriate operat ing instruct ions w here
applicable, or to a draw ing; sketch or circuit
diagram. Use reference list of items in Sect ion 8.
DangerPrecau t ions for Safe Working
High Voltage !
Touching live parts w ill result in severe personnel
injury and / or death.
This equipment shall be operated only by qualif ied
personnel w ho have become thoroughly familiar
w ith the operat ing instruct ions manual and in
part icular all the safety inst ruct ions.
5.5 Defeat ing t he Door In ter lock o f HV
Compar tm en t
Caut ion : Take utm ost care w hi le defeat ing any
in ter lock as t he defeat operat ion leads to access t o
the areas / par t s w h ich are l ikely to be l ive.
5.5.1 Draw out Un it in Connected Posit ion
The breaker compartment door interlock should only
be cancelled if the truck cannot be transferred to the
disconnected posit ion and the situat ion cannot be
cleared in any way.
- Sw itch of f the circuit -breaker.
- Make sure that the busbars are not live.
- Insert a small screw driver in the opening (21.6,
f ig. 21) and screw -in the grub screw visible
through the opening.t ill it falls out inside the
panel.
- Open the door by turning the door handle.(refer
clause 4.5.1).
5.5.2 Draw out Un it in disconnected posit ion
- Press the interlocking lever on interlocking plate by
hand.
- Insert the double-bit key in lock(21.4, fig.21) and
turn it ( locked) to "Manual Racking".
- Fit the hand crank (8.2, f ig. 8) to the hexagon
shank in opening turn it clockw ise as far as it w ill
go and pull it of f(21.5, f ig.21).
Turn the double-bit key clockw ise through 90º f rom
posit ion "Manual Racking" to "Connected
Posit ion(locked)" and pull it of f .
5.5.3 Restoring the Door In terlocks
Af ter carrying out the operat ions to defeat the door
interlock as described in clause 5.5.1 or clause 5.5.2,
the door of the HV compartment can be closed and
interlocks can be restored by follow ing the
procedures in clause 5.5.1 in the reverse sequence.
28
6. Disposal of Product
This product is environmentally compat ible.
The follow ing materials have been used to make up
the device : Steel, Copper, Alum inium, Cast-resin
glass-f ibre-reinforced thermoplast ics, rubber,
porcelain, greases & sim ilar materials. PVC is used as
an insulat ion material for control w ires.
In disposal, priorit y must be given to re-use of the
materials which can be recycled.
In as-supplied-condit ion, the product does not
incorporate any hazardous substances.
In operat ion, the product does not emit any
hazardous materials or gases.
During disposal of the product , care must be taken to
dismantle as far as possible in more environmentally
accepted way as Recyclable & Non-cyclable scraps i.e
steel, copper, alum inium, rubber, PVC, cast-resin &
glass-f ibre-reinforced materials to be segregated
properly.
The Re-cyclable materials like Steel, Copper,
Alum inium can be reused.
Non cyclable materials like Cast-resins, glass-f ibre-
reinforced etc can be broken in to pieces & can be
used as secured land f illing materials.
Rubber being biodegradable material must be
recycled through authorized contractors.
PVC material should not be burnt as they may release
Halogenated hydrocarbons which can af fect the
ozone layer. Therefore, PVC must be recycled through
authorized contractors.
Local Siemens of f ice can answer any questions
concern ing disposal.
29
7 Summary of Import ant Inst ruct ions-
DON'Ts
(1) Do not leave any equipments or tools in the
panel.
(2) Do not put hands or tools in operat ing
mechanism when electrically operated.
(3) Do not operate the breaker during cleaning
process.
(4) Do not use any other chem ical or grease for
clearing or lubricat ing other than mentioned
in these inst ruct ions.
DOs
During Inst al lat ion & Comm ission ing Stages :-
(1) Brush t he contact surfaces properly before
bolt ing busbars. Also grease the jo ints &
apply proper torque on the bolts.
(2) Check rated voltages of equipments such as
motor, closing & tripping releases mounted
in the operat ing mechanism w ith the
available auxiliary supply to be connected
to these equipments in the substat ion.
(3) Ensure that all the foundation bolts are
t ightened along w ith the square washer and
also seal of all control and power cable
cutouts to prevent verm in entry.
During ser vice l if e of the panel-
(4) Keep door & covers f irm ly closed to prevent
entry of dust, moisture, insects etc.
(5) Ensure spring charging handle & manual
handle are available easily.
(6) Decide maintenance schedule based upon
(a) no. of short circuit operat ions,
(b) frequency of breaker ON/OFF operat ions,
(c) pollut ion level (d) hum idity, etc.
(7) Isolate & earth the breaker before carrying
out maintenance & ensure it is in OFF
posit ion & springs are discharged
completely before cleaning.
(8) Ensure that the shut ters are close and pad
locked before start ing the maintenance or
cleaning of the panels.
(9) Depending on site condit ions, inspect
- the interior of the panels for dust ,
cobwebs etc. & clean them.
- porcelain insulators & clean them ,
- operat ing mechanism parts such as
plungers of releases, moving joint s etc. &
clean them , and
- funct ioning of space heaters.
(10) Lubricate moving par ts w ith lubricants
provided for the breaker.
(11) Check insulat ion resistance w ith a megger
before putt ing the breaker back into service.
(12) Keep a log-book for each panel.
(13) Follow inst ruct ions given in the operat ing
manual.
(14) Ensure panel operat ions, maintenance etc.
is done by t rained persons.
(15) Operate the defeat interlock of CB door only
in case of emergency.
30
8 Addit ional In format ion
8.1 Reference List o f Items
6.2 Bushings of lower mating contact Fig 6, 17
6.3 Current Transformer Fig 6
6.4 Cable Connect ion Pieces Fig 6
6.5 Wiring Cover Fig 6
6.6 Gland Plate for Poer Cables Fig 6, 18
7.1 LV Compartment Door Fig 7, 21, 21a
8.1 Charging Handle Fig 8
8.2 Cranking Handle Fig 8
8.3 Double Bit Key Fig 8
8.4 Rod Trap Key Fig 8
8.5 Earthing Sw itch Handle Fig 8
10.1 End Covers Fig 14
10.2 Pressure relief channel for
cable terminat ion compartment Fig 14
10.3 Pressure Relief f laps Fig 14
16.1 Breaker Compartment door Fig 16, 20,
21, 21a
16.2 Upper metallic shutter Fig 16, 19
16.3 Lower metallic shut ter Fig 16, 19
16.4 Space Heater Fig 16, 17
17.1 Fixed Contacts (Upper) Fig 17
17.2 Fixed Contacts (Lower) Fig 17
17.3 Earthing Strip Truck Fig 17
18.1 Extension Links Fig 18
18.2 Earthing strip from CB Chamber Fig 18
19.1 Shutter operating rod Fig 19
19.2 Roller Guide Angle Fig 19
19.3 Truck guide Fig 19
21.1 Ball grip Fig 21a
21.2 ON & OFF Push Button
(On HT Door) Fig 21, 21a
21.3 Window for the indicators of
the breaker truck Fig 21, 21a
21.4 Opening for Double Bit Key Fig 21, 21a
21.5 Opening for the cranking handle
for racking the breaker truck Fig 21, 21a
21.6 Opening for defeat ing interlock Fig 21, 21a
21.7 Door Handle Fig 21
21.8 Door locking bolts (for 24kV Panel) Fig 21a
24.1 Fixed Contacts (E. Sw itch) Fig 24
24.2 Moving Contact (E. Sw itch) Fig 24
24.3 Earthing Sw itch Shaf t Fig 24
24.4 Operating Link Fig 24
2.1 Circuit Breaker Compartment Fig 2
2.2 Cable & CT Compartment Fig 2
2.3 Busbar Compartment Fig 2
2.4 Low Voltage Compartment Fig 2
2.5 Breaker Truck Fig. 2, 20
3.1 Vacuum Interrupter Fig 3
3.2 Insulat ing Sw itching Rod Fig 3
3.3 LV Socket on truck Fig 3
3.4 Contact Arm Fig 3
3.5 Truck Handle Fig 3
3.6 Cast Resin Insulator Fig 3
3.7 Guide Roller on t ruck Fig. 3
3.8 PP Tube Fig. 3
3.1.1 Pole Flange (Upper) Fig 3.1
3.1.2 Pole Flange (Lower) Fig 3.1
3.1.3 PT on the truck Fig. 3.1
3.2.1 Mechanical ON' Push Button Fig. 3.2
3.2.2 Mechanical ON' Push Button Fig. 3.2
3.2.3 Spring Charging Opening Fig 3.2
3.2.4 Spring Charge Indicat ion Fig 3.2
3.2.5 Mechanical ON & OFF' Indication Fig 3.2
3.2.6 Mechanical Operat ion Counter Fig 3.2
3.2.7 Earthing Pin for Truck Fig 3.2
4.1 Door Locking hinge pin Fig 4, 21
4.2 Door close interlock Fig 4
4.3 View ing w indow for truck posit ion Fig 4
4.4 View ing w indow for Spring charge
Indicator and Mechanical Counter Fig 4
4.5 LV connection Plug Fig 4
4.6 Drive Mechanism housing Fig 4
4.7 Ramp Fig 4
4.8 Interlocking Plate (Drive Box) Fig 4
4.9 Holder for LV Socket Fig 4
4.10 Clip for locking LV Plug to Breaker Fig 4
4.12 Trip mechanism for operat ing the
breaker in service posit ion Fig 4
4.13 Rod Lever Fig 4
5.1 Bushings of upper mating contact Fig 5, 17
5.2 Cast resin insulator Fig 5
5.3 Feeder connections Fig 5
5.4 Busbars Fig 5
6.1 Main Earth Busbar Fig 6, 18
31
8.2 Join t ing Torques
Sr. No. Type of Join t Torque (Nm ) ± 10%
Size of Bolt M8 M10 M12 M20
Property Class 6.6 8.8 8.8 8.8
1 Steel to Steel 32 65 115 -
2 Steel w ith Insulator 16 32 77 170
3 Busbar Joint 20 40 70 -
4 Busbar w ith Steel 20 40 70 -
Note: The Values given in the table above are for Tigh t en ing Torques. For test ing the joint 70% of above
values are to be considered as Checking Torque.
When ordering spare parts state the follow ing:
1. Type designat ion, Rat ing, Year of manufacturing of the panel as stated on the rat ing plate.
2 . The designat ion of part , as located from the photograph or sketch given in this manual.
3 . The descript ion of the part as given in the reference list on page 29.
4. In case the item is not listed below or is not shown in any of the photograph or sketch, please communicate
w ith, brief descript ion of the part and its locat ion in the panel.
5 . Alternat ively, a sample may be submit ted.
Siemens Ltd.PTD-03-152-015
This replaces PTD-03-152-003
Siemens Lt d.
Power Transm ission & Distr ibut ion Division
Medium Voltage Switchgear
Thane Belapur Road,
Thane 400 601.
Tel. : +91-22-760 0135
Fax : +91-22-760 0134 Order No. 4-XXBXX-03-17231-101
'Product development is a continuous process. Consequent ly, the
data indicated in this Booklet is subject to change w ithout prior
not ice. For the latest informat ion please contact our Sales Of fices.'
030001
s
s
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