REPARING WORKS OF VCB/OCBs FOR EDD I/II/III/IV BALLIA UNDER TEST DIVISION

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Complete repairing/maintenance of different make 11 KV VCB / OCBs installed 33/11 KV S/S including overhauling / repairing and replacement of defective / damaged parts , complete earthing etc. alongwith cost of labour , T & P & petty materials required for proper completion of work The repaired VCB / OCBs will be tested on load and shall be guarented for six month. (A) Withdrawal of VCB outside the panel and cleaning of the breakers and check Rack in Rack out of Breaker. (B) Checking of all auxiliary switches operation and replacement of faulty switches by new one. (C) Checking of all free mechanism and attending the sluggish operation of any part. (D) Removal of old grease from various parts. (E) Greasing and cleaning of mechanism and all moving parts as recommended in service manual check wear and tear of springs, coils, hardware etc i.e. through servicing of all mechanical parts. (F) Cleaning and washing of various parts including all three poles with CRC-2-26. (G) Check the setting of latch/unlatch mechanism, release etc. (H) Checking of VI assembly, cleaning and attending/replacing of all current carrying contacts (if required). (I) Checking of ON/OFF operation manually as well as electrically. (J) Checking of breaker interlocks assembly, Jaw contact condition shutter assembly, closing/tripping coil assembly. (K) Checking of electrically/manually spring charging mechanism for operations. (L) Cleaning and checking of all parts and tightness checking of all hardware. (M) Insertion of breaker and check service/test position. (N) Carrying out insulation resistance measurement, CRM and timing test of breaker in test position. (O) Change Breaker on no load condition. (P) Problem of rectification, it any and checking/fine tuning of control circuit. (Q) All necessary consumable spares & hardware line like circlips, bolts, nuts, washers, grease, contact cleaner (CRC-2-26) will be born by the contractor. (R) Detailed report for serviced breaker will be submitted after completion of job.

MILAN CONTRUCTION WORK