GE Consumer & Industrial Power Controls
ACB Spare Parts Manual
GE Consumer & Industrial Power Controls GEPC has been in the forefront of industrial Air Circuit Breaker installations in India. With an installed base of over 1,50,000 numbers of Air Circuit Breakers in the country we continue to be one of the largest suppliers of Air Circuit Breakers in India. These Air Circuit Breakers have proven themselves by performing in trying and testing conditions for many decades. Air Circuit Breakers form an integral heart of any electrical installation and our efforts have been to provide our valued customers with all the necessary tools, processes and spares to ensure that the Air Circuit Breakers continue to provide trouble free service. In line with our philosophy to provide customers with all the necessary choices, we are through this Spare Parts Manual bringing out an exhaustive listing of spares that any ACB user may ever need to maintain his Air Circuit Breakers in good shape. These spares are made available through one of the largest channel partner networks in the country and also through over 40 Approved Service Franchise setups. A point worth mentioning here is that the Air Circuit Breakers should almost always as a rule be maintained and serviced by GEPC trained personnel. A GEPC product undergoes many minor changes to enhance performance from time to time and such intricacies are generally shared with the service personnel to help them maintain customer ACBs better. A step further, all the ASF service personnel are adequately trained and have access to our recommended process of maintenance and also have adequate stock of genuine spares. Importance of both these counts cannot be diluted. Also an ACB that has NOT been serviced as per recommendation and specific current carrying parts not serviced properly, the repercussions could be major, exposing the customer to undue risk and safety issues. The manual has been made keeping the customers requirements in view and is expected to help in easier: 1. Identification of parts 2. Ordering of parts through proper Parts Codes. 3. Access to the nearest Service Franchise location. 2
Residential ACB Spare Products Parts
Contents
3
SPECTRONICS
-
A
MPACT
-
B
UNEPACT
-
C
OTHERS
-
D
GE Consumer & Industrial Power Controls
SPECTRONICS ACB RANGE - A Sl.#
DESCRIPTION
1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. 35. 36. 37. 38.
Arc Chutes Arcing Contacts Auxiliary Switches Back Panels Castle Interlocks Closing Coil Closing Prevention Device Clusters Cradle Assembly Current Transformers Distinct Fault Signalling Door Inter Locks Front Box Assembly Front Protection Sheet Gear Box Handles Indicators Lead Screw LT Fixed & Moving Motor Motor Cut Off Switch Movable for IMS Pole Assembly Position Contacts Push Buttons Rating Plug with Ground Fault Rating Plug without Ground Fault Rear Horizontal Terminals Rear Vertical Terminals Releases Ronis Locks Shunt Trip Assembly Shutter Assembly Springs UDC Undervoltage Trip Assembly Wiring Harness Miscellaneous
ACB RANGE SPECTRONICS Spares arranged in alphabetical order
4
Residential ACB Spare Products Parts
Description
Prod.Code
qty/br 3p/4p Pkng/Qty
ARC CHUTE Arc Chute for 800 A - 1600 A Arc Chute for 2000 A Arc Chute for 2500 A Arc Chute for 3200 / 4000 A
SPS0000007 SPS0000008 SPS0000009 SPS0000117
3/4 3/4 3/4 3/4
1 1 1 1
ARCING CONTACTS Fixed Arcing Contact 800 -1600A 2000A 2500A 3200/4000A -S3 Moving Arcing Contact 800 -1600A 2000A 2500A 3200 -4000A Related Spares ARC BARRIER 800 - 1600A ARC BARRIER 2000 - 2500A
ARC CHUTE SPS0000001 SPS0000003 SPS0000005 SPS0000114
1 1 1 1
1 1 1 1
SPS0000094 SPS0000095 SPS0000096 SPS0000113
3/Pole 4/Pole 5/Pole 4/6/Pole
1 1 1 1
SPS0000435 SPS0000436
4/6 4/6
1 1
SPS0000064
4
1
SPS0000421 SPS0000556 SPS0000422 SPS0000557 SPS0000423 SPS0000558 SPS0000404 SPS0000567 SPS0000422
3 4 3 4 1 1 1 1 3/4’
1 1 1 1 1 1 1 1 1
SPS0000105 SPS0000495 SPS0000494 SPS0000496 SPS0000497 SPS0000480 SPS0000493
1 1 1 1 1 1 1
1 1 1 1 1 1 1
SPS0000296 SPS0000161 SPS0000297 SPS0000298 SPS0000299
1 1 1 1 1
1 1 1 1 1
ARCING CONTACTS
AUXILARY SWITCH AUXILARY SWITCH 1 NO + 1 NC
BACK PANELS 800 - 1600 A 3 P 800 - 1600 A 4 P 2000 A 3 P 2000 A 4 P 2500 A 3 P 2500 A 4 P 3200/4000 A 3 P 3200/4000 A 4 P Spare support Isolator for Frame S2
AUXILIARY SWITCH
CASTLE INTERLOCK KIT Castle Lock Castle Lock Castle Lock Castle Lock Castle Lock Castle Lock Castle Lock
A Type B Type C Type AB Type BC Type AA Type AC Type
BACK PANELS
CLOSING COIL CLOSING COIL 48V - 50Hz, S2 CLOSING COIL 220V AC CLOSING COIL 240V - 50Hz, S2 CLOSING COIL 380V - 50Hz, S2 CLOSING COIL 48V - 50Hz, S3
5
CASTLE INTERLOCK KIT
GE Consumer & Industrial Power Controls Description
CLOSING COIL 110 V AC CLOSING COIL 240V - 50Hz, S3 CLOSING COIL 380V - 50Hz, S3 CLOSING COIL 48V,DC-S2 CLOSING COIL 60V,DC-S2 CLOSING COIL 110V DC CLOSING COIL 24V,DC-S3 CLOSING COIL 48V,DC-S3 CLOSING COIL 127V,DC-S3
Prod.Code
SPS0000160 SPS0000300 SPS0000301 SPS0000311 SPS0000312 SPS0000100 SPS0000315 SPS0000316 SPS0000317
qty/br 3p/4p Pkng/Qty
1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1
SPS0000107 SPS0000108 SPS0000109 SPS0000110 SPS0000111 SPS0000112 SPS0000210 SPS0000188 SPS0000190 SPS0000191 SPS0000192 SPS0000193 SPS0000339
1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1
SPS0000010 SPS0000011 SPS0000012 SPS0000013 SPS0000014
6/8 6/8 6/8 6/8 6/8
1 1 1 1 1
SPS0000235 SPS0000236 SPS0000231 SPS0000237 SPS0000238 SPS0000230 SPS0000239 SPS0000240 SPS0000247 SPS0000248 SPS0000249 SPS0000250 SPS0000251 SPS0000252 SPS0000253 SPS0000229
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
CLOSING COIL
CLOSING PREVENTION DEVICE S2 110V AC S2 220V AC S2 415V AC S2 24V DC S2 48V DC S2 110V DC S2 220V DC S3 110V DC S3 110V AC S3 220V AC S3 415V AC S3 24V DC S3 220V DC
CLOSING PREVENTION DEVICE
CLUSTER CONTACTS S800 - S1600 S2000 S2500 S3200 S4000
CLUSTER CONTACTS
CRADLE ASSEMBLY 800A,3P 1000A,3P 1250A,3P 1600A,3P 2000A,3P 2500A,3P 3200A, 3P 4000A, 3P 800A, 4P 1000A, 4P 1250A, 4P 1600A, 4P 2000A, 4P 2500A, 4P 3200A, 4P 4000 A 4P
CRADLE ASSEMBLY
CURRENT TRANSFORMER (PHASE)
6
Residential ACB Spare Products Parts
Description
Prod.Code
qty/br 3p/4p
Pkng/Qty
CURRENT TRANSFORMER (PHASE) CT - 800A ( 1 CT ) CT - 1000A ( 1 CT ) CT - 1250A ( 1 CT ) CT - 1600A ( 1 CT ) CT - 2000A ( 1 CT ) CT - 2500A ( 1 CT ) CT - 3200A ( 1 CT ) CT - 4000A ( 1 CT ) Phase CT 630 / 800 Amps LMZ 7 Phase CT 800 / 1000 Amps LMZ 7 Phase CT 1000 / 1250 Amps LMZ 7 Phase CT 1250 / 1600 Amps LMZ 7 Phase CT 2000 Amps LMZ 7 Phase CT- 2500 Amps LMZ 7 Phase CT- 3200/4000 Amps LMZ 7
SPS0000065 SPS0000066 SPS0000067 SPS0000068 SPS0000069 SPS0000194 SPS0000115 SPS0000116 SPS0000374 SPS0000376 SPS0000378 SPS0000380 SPS0000382 SPS0000345 SPS0000396
3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
DOOR INTERLOCK KIT
DISTINCT FAULT SIGNALLING WITH GROUND FAULT WITHOUT GROUND FAULT
DISTINCT FAULT SIGNALLING
SPS0000118 SPS0000177
1 1
1 1
SPS0000158 SPS0000207
1 1
1 1
SPS0000169 SPS0000171 SPS0000172 SPS0000183 SPS0000170 SPS0000357 SPS0000173 SPS0000184
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
SPS0000163 SPS0000350 SPS0000351 SPS0000354 SPS0000352 SPS0000353 SPS0000355
1 1 1 1 1 1 1
1 1 1 1 1 1 1
SPS0000428 SPS0000429
1 1
1 1
DOOR INTERLOCK KIT Door Interlock kit for S2 Frame Door Interlock kit for S3 Frame
FRONT BOX ASSEMBLY 800A - 1600A 3P 2500A 3P 2000A 3P 3200A - 4000A 3P 800A - 1600A 4P 2000A 4P 2500A 4P 3200A - 4000A 4P
FRONT BOX ASSEMBLY
FRONT PROTECTION SHEET 800A - 1600A 3P 2000 3P 2500 3P 3200/4000 3P 800 - 1600A 4P 2000 4P 3200/4000 4P
FRONT PROTECTION SHEET
GEAR BOX DERLIN GEAR SET for Frame S2 DERLIN GEAR SET S3 Frame S3
GEAR BOX
7
GE Consumer & Industrial Power Controls Description
Prod.Code
qty/br 3p/4p
Pkng/Qty
HANDLES RACKING HANDLE - S2 RACKING HANDLE - S3 CHARGING HANDLE - S2/S3
SPS0000166 SPS0000356 SPS0000164
1 1 1
1 1 1 HANDLES
INDICATORS COMMON FAULT INDICATOR
SPS0000098
1
1
SPS0000454 SPS0000455
1 1
1 1
SPS0000198 SPS0000103 SPS0000199 SPS0000104
2 2 4 4
1 1 1 1
SPS0000032 SPS0000033
1 1
1 1
SPS0000099
1
1
SPS0000241 SPS0000242 SPS0000234 SPS0000243 SPS0000244 SPS0000233 SPS0000245 SPS0000246 SPS0000254 SPS0000255 SPS0000256 SPS0000257 SPS0000258 SPS0000259 SPS0000260 SPS0000232
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
SPS0000471 SPS0000472 SPS0000473 SPS0000474 SPS0000475
3/4’ 3/4’ 3/4’ 3/4’ 3/4’
1 1 1 1 1
LEAD SCREW LEAD SCREW FOR S2 LEAD SCREW FOR S3
LT - FIXED & MOVING FIXED LT_3 WAY FIXED LT_6 WAY MOVING LT_3 WAY MOVING LT_6 WAY
INDICATORS
MOTOR MWS MOTOR 110V MWS MOTOR 220V Motor related Spares MOTOR CUT OFF SWITCH
LEAD SCREW
MOVABLE FOR IMS 800A 3 POLE IMS 1000A 3 POLE IMS 1250A 3 POLE IMS 1600A 3 POLE IMS 2000A 3 POLE IMS 2500A 3 POLE IMS 3200A 3 POLE IMS 4000A 3 POLE IMS 800A 4 POLE IMS 1000A 4 POLE IMS 1250A 4 POLE IMS 1600A 4 POLE IMS 2000A 4 POLE IMS 2500A 4 POLE IMS 3200A 4 POLE IMS 4000A 4 POLE IMS
LT - FIXED & MOVING
MOVABLE
POLE ASSEMBLY S 800A - S1600A POLE ASSEMBLY DRAWOUT S 2000A POLE ASSEMBLY DRAWOUT S 2500 A POLE ASSEMBLY DRAWOUT S 3200 A POLE ASSEMBLY DRAWOUT S 4000 A POLE ASSEMBLY DRAWOUT
POLE ASSEMBLY
8
Residential ACB Spare Products Parts
Description
Prod.Code
Pole related Spares HYLAM SHEET B/W POLES 800-1600A SPS0000433 HYLAM SHEET B/W POLES 2000-2500ASPS0000434
qty/br 3p/4p
Pkng/Qty
4/6 4/6
1 1
1
1
POSITION CONTACTS CONNECTED & WITHDRAWN CONNECTED & TEST POSITION INDICATOR CONNECTED CONTACT
SPS0000189
POSITION CONTACTS SPS0000197 SPS0000101
1 1
1 1
SPS0000195
1
1
PUSH BUTTONS RED PUSH BUTTON
RATING PLUG - WITHOUT GROUND FAULT 800 @ 800 1000 @ 1000 1250 @ 1250 1600 @ 1600 2000 @ 2000 2500 @ 2500 3200 @ 3200 4000 @ 4000 400 @ 800A 600 @ 800A 800 @ 1000A 800 @ 1600A 1200 @ 1600A 1200 @ 2000A 1600 @ 2500A 1600 @ 3200A 2500 @ 4000A
SPS0000043 SPS0000044 SPS0000045 SPS0000046 SPS0000047 SPS0000048 SPS0000049 SPS0000050 SPS0000051 SPS0000052 SPS0000053 SPS0000054 SPS0000055 SPS0000056 SPS0000057 SPS0000058 SPS0000059
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
PUSH BUTTONS
RATING PLUG - WITHOUT GROUND FAULT
RATING PLUG WITH INTERGRATED GROUND FAULT 400A (SP 800) 600A (SP 800) 800A (SP 800) 800A (SP 1000) 1000A (SP 1000) 1250A (SP 1250) 800A (SP 1600) 1200A (SP 1600) 1600A (SP 1600) 1200A (SP 2000) 2000A (SP 2000) 1600A (SP 2500) 2500A (SP 2500) 1600A (SP 3200) 3200A (SP 3200) 2500A (SP 4000) 4000A (SP 4000)
9
SPS0000122 SPS0000123 SPS0000124 SPS0000125 SPS0000126 SPS0000127 SPS0000128 SPS0000129 SPS0000130 SPS0000131 SPS0000132 SPS0000133 SPS0000134 SPS0000135 SPS0000136 SPS0000137 SPS0000138
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
RATING PLUG WITH INTERGRATED GROUND FAULT
GE Consumer & Industrial Power Controls Description
Prod.Code
qty/br 3p/4p Pkng/Qty
REAR HORIZONTAL TERMINAL 800-1600A 2000A 2500A 3200A 4000A
SPS0000168 SPS0000141 SPS0000144 SPS0000147 SPS0000149
6/8 6/8 6/8 6/8 6/8
1 1 1 1 1 REAR HORIZONTAL TERMINAL
REAR VERTICAL TERMINAL 800-1600A 2000A 2500A 3200A 4000A
SPS0000139 SPS0000142 SPS0000145 SPS0000348 SPS0000349
6/8 6/8 6/8 6/8 6/8
1 1 1 1 1
SPS0000405 SPS0000340 SPS0000174 SPS0000213
1 1 1 1
1 1 1 1
SPS0000449 SPS0000450
1 1
1 1
SPS0000155
1
1
SPS0000154 SPS0000152 SPS0000153
1 1 1
1 1 1
SPS0000156
1
1
SPS0000157
1
1
SPS0000035 SPS0000036 SPS0000037 SPS0000038 SPS0000039 SPS0000040 SPS0000041 SPS0000042 SPS0000457 SPS0000458
2 2 2 2 2 2 2 2 1 1
1 1 1 1 1 1 1 1 1 1
RELEASES LMZ 7 Release with FAULT indicator LMZ 7 Release RMS-7 Release RMS-9D Release
REAR VERTICAL TERMINAL
RMS 9 Rating Plug RMS-9 Rating Plug._S2 RMS-9 Rating Plug._S3
RONIS LOCK & PADLOCK IN WITHDRAWN POSITION BY RONIS LOCK IN TRIP POSITION BY PADLOCKS+RONIS LOCK IN TRIP POSITION BY PADLOCKS IN TRIP POSITION BY RONIS LOCK IN CONNECTED POSITION BY RONIS LOCK LOCAL CONTROL INTERLOCKING BY PADLOCKS
RELEASES
SAFETY SHUTTERS 800-1600A 3P 800-1600A 4P 2000A 3P 2000A 4P 2500A 3P 2500A 4P 3200-4000A 3P 3200-4000A 4P SHUTTER MECHANISM S2 SHUTTER MECHANISM S3
RMS 9 RATING PLUG
RONIS LOCK & PADLOCK
10
Residential ACB Spare Products Parts
Description
Prod.Code
qty/br 3p/4p Pkng/Qty
SHUNT TRIP ASSEMBLY 220V AC 110V AC 415V AC 24V DC 110V DC 24V AC- 50Hz -EA 48V AC- 50Hz 24V DC 48V DC 220V DC
SPS0000016 SPS0000017 SPS0000018 SPS0000019 SPS0000020 SPS0000286 SPS0000287 SPS0000288 SPS0000289 SPS0000063
1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1
SPS0000452 SPS0000453 SPS0000451
1 1 1
1 1 1
SPS0000097
1
1
SPS0000554
1
1
SPS0000506
1
1
SAFETY SHUTTERS
SPRINGS MAIN CHARGING SPRING_S2 MAIN CHARGING SPRING_S3 EX-TRIP TENSION SPRING SPRING CHARGING INDICATION SWITCH Spring Kit Frames S2 & S3 (except main springs) Frame S3 Mechanism springs set (w/o main spring)
SPRINGS
UDC UDC - Frame S2
SHUNT TRIP ASSEMBLY
SPS0000373
1
1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Under Voltage Tripping Mechanism 220 V AC 110 V AC 415 V AC 24 V DC 110 V DC 24V - 50Hz/60Hz 48V - 50Hz/60Hz 380V - 50Hz/415V -60Htz 415V - 50Hz/500V -60Htz 500V - 50Hz 220V - 60Hz 48 Volts DC 220V DC 440V DC 500V DC DELAYED Under Voltage - 200 ms DELAYED Under Voltage - 600 ms
11
SPS0000021 SPS0000022 SPS0000023 SPS0000024 SPS0000025 SPS0000277 SPS0000278 SPS0000279 SPS0000280 SPS0000281 SPS0000282 SPS0000006 SPS0000283 SPS0000284 SPS0000285 SPS0000026 SPS0000320
UDC
UV
GE Consumer & Industrial Power Controls Description
Prod.Code
qty/br 3p/4p Pkng/Qty
Wiring Harness LMZ7 for 800 A- 1600 A 3 pole LMZ7 for 800 A- 1600 A 4 pole LMZ7 for 2000 A 3 pole LMZ7 for 2000 A 4 pole LMZ7 for 2500 A 3 pole LMZ7 for 2500 A 4 pole RMS 7 Wiring Harnes S2&S3, 3P&4P RMS 7 Wiring Harnes S2&S3, 3P&4P
SPS0000375 SPS0000377 SPS0000379 SPS0000381 SPS0000383 SPS0000385 SPS0000460 SPS0000461
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
SPS0000555 SPS0000511 SPS0000512 SPS0000513 SPS0000523 SPS0000524
1 1 1 1 1 1
1 1 1 1 1 1
SPS0000525 SPS0000526 SPS0000165 SPS0000034 SPS0000431 SPS0000121 SPS0000430 SPS0000182 SPS0000432 SPS0000427 SPS0000462 SPS0000463 SPS0000464
1 1 1 1 1 1 18 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1 1 1 1
SPS0000448 SPS0000120 SPS0000159
1 1 1
1 1 1
SPS0000338
1
1
WIRING HARNESS
Misc. Spares Hardware Kit for S2 & S3. .washers, circlips & split pin Shaft Roller Assembly Trip Probe assembly Bearing Assembly IMS to MWS Conversion kit Hylum Tube Long for 2000 A 3P Hylum Tube for pillar assembly 2000 A 3P Pillar Assembly 2000 A 3 P FRONT FACIA WITH PMU DOOR EX TRIP COIL- S2 AND S3 EX COIL TRIP SHAFT Voltage Conditioner 1 Set - 3 Nos LT CONTACTS FOR FIXED BREAKER OPERATION COUNTER KIT Shunt TRIP SHAFT S3 MECHANISM DOOR GASKET FRONT BOX GASKET RACKING ROLLER ASSLY ISOLATING CONTACT MOULD(800-1600) ZONE SELECTIVE INTERLOCKING REINFORCED GROUND PLUG RACKING SWITCH FOR Iso/test/ service Position
12
Residential Products
AIR CIRCUIT BREAKER FAULT ANALYSIS PROBLEM
BREAKER IS NOT CLOSING PROBABLE CAUSE a) Under voltage release not connected with supply. b) Under voltage release, Shunt release, connecting link not adjusted properly. c) Under voltage release coil burnt out or open circuited. d) After overload or short circuit f ault , breaker not reset (ONLY FOR MANUALLY RESET T YPE ACB.) e) Sticking of tripping mechanism due to excess dust. On greasing)
PROBLEM
d)
Reset the breaker by pressing OFF/RESET button.
e)
Clean the tripping mechanism with CRC 2-26 & grease them. (refer section
POSSIBLE SOLUTION a) Check control wiring of shunt release and ensure that shunt release gets supply. b) Check control wiring.
c)
Ensure that pins are in position.
d) Remove the dust from the release and clean it with CRC 2-26.
PROBABLE SOLUTION a) Adjust the push button link correctly
b)
Clean the latch of the mechanism with CRC 2-26.
ACB IS NOT TRIPPING IN CASE OF OVERLOAD OR SHORT CIRCUIT FAULT PROBABLE CAUSE a) Connection between C.T. and release is loose or open circuit. b) O verload set ting of Re le ase is more than actual load current. c) Release linkage not adjusted properly.
31
Replace the under voltage release.
BREAKER IS NOT TRIPPING BY MANUAL TRIP PUSH BUTTON PROBABLE CAUSE a) Trip push buttons connecting link is short. (Not adjusted properly) b) Latch of the mechanism jammed because of dust.
PROBLEM
c)
BREAKER IS NOT TRIPPING WITH UNDERVOLTAGE OR SHUNT RELEASE. PROBABLE CAUSE a) Shunt release does not get supply. b) Supply of under voltage release does not get cut off. c) Link pins of under voltage or shunt release misplaced. d) Due to dust release becomes sticky.
PROBLEM
POSSIBLE SOLUTION a) Give rated voltage to under voltage release. b) Adjust the connecting linkage of releases correctly.
POSSIBLE SOLUTION a) Tighten the terminals of C.T. in case of open circuit . b) Make the ove rload setting of ACB as per actual load current. c) Connect the linkage of Release and ensure its Tripping operation.
GE Consumer & Industrial Power Controls PROBLEM
MAIN CONTACTS OF ONE OF THE POLE OF ACB NOT CLOSING PROBABLE CAUSE a) Excessive dust accumulated in the pole assembly.
b)
PROBLEM
Pole setting disturbed.
PIT TING ON MAIN CONTACTS PROBABLE CAUSE a) Thickness of arcing contact is reduced below the specified specified limit (> 0.5 mm)
PR OBLEM
b)
Breaker is operated without arc chute in position
b) c) d)
Dusty atmosphere. Use of undersized cable or bus bars High ambient temperature
POSSIBLE SOLUTION a) Clean the terminals with CRC 2-26 and do proper re termination. Ensure that milli Volt drop within specified limits. b) Do periodic cleaning of circuit breaker. c) Use cables or bus bars of adequate rating. d) Reduce load current or select and install correct rating of ACB.
BRE AKER I S CHARGED WI TH MOTOR PROBABLE CAUSE a) Motor is not getting supply
b) PR OBLEM
POSSIBLE SOLUTION a) Clean the deion plates and side Insulation strips of arc chutes with CRC 2-26 b) Always operate ACB with arc chute in position and keep the arc chutes clean
OVERHEATING PROBABLE CAUSE a) Poor termination (High milli volt drop across termination on ACB)
PR OBL EM
POSSIBLE SOLUTION a) Replace both fixed and moving arcing contacts.
EROSION ON ARCING CONTACTS PROBABLE CAUSE a) Rough deion plates of arc chutes.
PROBLEM
POSSIBLE SOLUTION a) Clean the pole assembly mechanism With CRC 2-26. Remove grease and dust With brush and apply fresh grease. b) Consult the manufacturer of Circuit Breaker.
Motor is burnt out
POSSIBLE SOLUTION a) Check the motor circuit. Replace it if it is damaged. b) Replace the motor
BRE AKER IS NOT CLOSING REMOTELY PROBABALE CAUSE a) Breaker is not in service position b) Closing coil is not getting supply
c)
Closing coil burnt out or open circuited.
POSSIBLE SOLUTION a) Take the breaker in service position b) Check control circuit and ensure that coil gets supply. c) Replace the closing coil.
32
