Routine, Breakdown Maintenance and Testing of 400/132/33/11KV Switchyard

Amount

PART- A: ROUTINE MAINTENANCE WORKS

Round the clock operation of air compressors of ‘A’TPS daily (including SUNDAYS & HOLIDAYS).

Routine Maintenance of 400 KV‘A’ TPS, Switchyard in Anpara.

Routine Maintenance of 400 KV‘B’ TPS, Switchyard in Anpara.

Routine Maintenance of 132 /33/11KV‘A’ TPS, Switchyard in Anpara.

Routine Maintenance of 100MVA ICTs, 10MVA CS-1&2, 400/33KV reactor 220/48V battery system & MCC room etc.

PART- B: BREAKDOWN MAINTENANCE WORKS Providing assistance in the following works

Dismantling, erection, commissioning & testing of 400/132KV Lightning arrestor & CVT.

Dismantling, erection, commissioning & testing of 400KV CT.

Dismantling, erection, commissioning & testing of 132KV CT.

Preventive maintenance of 400KV Sequential /Pantograph isolator including bearing O/H

Preventive maintenance of 132KV Sequential isolator including bearing O/H

Providing shunts/ restrengthening /replacement of 400/132KV damaged jumper.

Centrifuging of oil of 100MVA ICTs/ Reactor / 10MVA Transformer per day.

Replacement of pantograph isolator of one pole

Replacement of support insulator of pipe bus of 400/132KV along with associated work

Rewinding of induction motors of 3 phase, 415-430 volt and 220V DC motors of following rating.

Up to 1.0 KW

Above1.0 KW & up to 2.5 KW

Above 2.5 KW & up to 5.0 KW

Above 5.0 KW & up to 10.0 KW

Above 12.0 KW & up to15.0 KW

Overhauling of 3 phase, 415-430 volt, induction motors of following ratings:

Up to 5.0 KW

Above 10.0 KW & up to 15.0 KW

Replacement of Male & or Female contacts of one pole of 11KV MOCB breaker.

Replacement one pole of 11 KV VCB breaker

Replacement of wave trap of one phase

Replacement of trapeze assembly

Replacement of Pilot Valve of 400 KV BHEL/Siemens SF6 Breaker

Erection and Dismantling of Scaffolding in 132/400 KV switchyard per pole

Replacement of one Buchholz relay of ICT/Reactors/10 MVATransformer.

Shifting of one 10 –14 KL capacity oil tank

Replacement of PRV of 100MVA,400/132/33KV ICT

Attending hot spot from 400KV/132KV Switchyard Equipments.

Attending air leakages from cooler tubes of IR make type 15T-2 air compressors by replacing the faulty tube with new/repaired tube:

Attending problem of safety valve floating of various stages of 15T-2 compressors:

Attending mal-functioning of 60Kg/cm2 air pressure reducers and solenoid valves by replacing O-rings, gaskets & seals

Attending problem of air leakage/passing from 60Kg/CM2 NRV by replacing faulty valves seals, spring etc

Checking and attending air leakage from 400/132 KV S/Y compressed air line stop valves, NRV etc

Brazing, cutting and jointing the finned tube cooler nest for attending the air leakage from 60Kg/cm2 finned tubes of stage-I,II,III of 15T-2 compressors are to be repaired

Brazing, cutting/jointing works on 30Kg/cm2 compressed air pipe line of 400/132 KV S/Y:

Replacement of desiccant material & overhauling of heat less air drier.

Replacement of crank shaft of 15T-2 IR make compressors

O.H. of Compressors

Disconnecting and connecting of terminal connectors at transformer bushing of ICT/GT per phase

Shorting of all the three phases of Generator bay

PART- C: TESTING WORKS

400 KV SF6 Circuit breaker timing test.

132 KV ABCB/SF6 Circuit breaker timing test.

132 KV ABCB/SF6 Circuit breaker static contact resistance measurements.

400 KV SF6 Circuit breaker static contact resistance measurements.

400 KV Centre break isolator contact resistance measurement.

132 KV Centre break isolator contact resistance measurement.

Testing of 400 KV CT & its connected circuit.

Testing of 132 KV CT & its connected circuit.

Testing of protection and tripping relays of 132/6.9 KV & 132/11KV Transformers

Testing of 11/33 KV MOCB/Vacuum Circuit breaker(R,Y&B phase)

Testing of 11/33KV CT and it’s connected circuit.

Circuit Breaker Timing Test Kit

Contact Resistance Measurement test kit

Primary Injection Test Kit

Testing of Distance Protection numerical relays (REL670, 7SA522, P543 and P542)

Testing of Transformer Differential, REF, etc. Protection numerical Relay (P645).

Testing of Over Current, Earth Fault, etc. Protection numerical Relay (P142).

Testing of 11 KV Over Current, Earth Fault, etc. Protection numerical Relay (VAMP).

Relay Test Kit

OASIS TECHNO ENGINEERS Pvt. Ltd.

ELITE POWERTECH Private Limited