CA NO CWEAFJ-39/2026-27 REPAIR AND MAINT OF HT VCBs SF-06 AND MISC CONNECTED ITEMS AT AIR FORCE STATION PATHANKOT UNDER GE (AF) PATHANKOT

Supply, dismantling, complete servicing, reinstallation, testing and commissioning of 11 KV Vacuum Circuit Breaker (VCB) panel up to 630/800 Amps Incomer and 200/400 Amps Outgoing of ABB/Schneider/, comprising complete withdrawal of breaker truck from panel, dismantling of complete operating mechanism, cleaning of vacuum interrupter chamber, busbars, epoxy insulators, support insulators, shutters, panel compartments, operating linkages and all moving parts, removal of carbon deposits, dust, moisture and foreign particles using approved electrical cleaning solvent, lubrication of all moving parts, bearings, rollers, shafts and operating mechanism with approved synthetic grease, tightening of all power and control terminals, checking and adjustment of contact gap, contact wipe, contact travel, spring charging mechanism, operating shaft, auxiliary contacts, electrical and mechanical interlocks, shutters, racking mechanism, earthing arrangement, mimic diagram, control wiring and indication lamps, checking of CT/PT secondary wiring, carrying out insulation resistance test, contact resistance measurement, breaker timing test, relay coordination, secondary injection test wherever required, functional operation, commissioning and satisfactory performance under load including supply of all consumables, lubricants, cleaning chemicals, nuts, bolts, washers, ferrules, cable ties, transportation within station, all labour, supervision, tools & plants, tackles, lifting arrangements, testing instruments, minor accessories and all incidental works complete all as specified and directed by the Engineer-in-Charge.

Supply and fixing of vacuum interrupter (Vacuum Bottle) suitable for 11 KV vacuum circuit breaker up to 630/800 Amps, including dismantling of defective vacuum interrupter, removal from operating mechanism, supply and installation of new OEM compatible vacuum interrupter, alignment of moving and fixed contacts, adjustment of contact travel, contact wipe, operating stroke, breaker timing calibration, insulation resistance measurement, contact resistance test, functional operation and commissioning complete including supply of all fixing materials, hardware, labour, transportation, testing equipment, consumables, tools & plants, tackles, minor accessories and all incidental works complete all as specified and directed by the Engineer-in-Charge.

Supply and replacement of main moving contact assembly suitable for 11 KV VCB up to 630/800 Amps, including dismantling of existing contact assembly, cleaning of contact housing, fitting of new silver alloy contact assembly, alignment, adjustment of pressure, checking of operating mechanism, contact resistance measurement, breaker timing test, functional testing and commissioning complete including labour, transportation, consumables, tools & plants and all incidental works all as specified and directed by Engineer-in-Charge.

Supply and replacement of fixed fontact assembly suitable for 11 KV VCB up to 630/800 Amps, including dismantling of defective contact assembly, cleaning of contact housing, fixing of new contact assembly, alignment, adjustment, tightening, contact resistance test, breaker timing test, complete commissioning including labour, transportation, consumables, tools & plants and all incidental works all as specified and directed by Engineer-in-Charge.

Supply and replacement of arcing contact assembly suitable for 11 KV VCB up to 630/800 Amps, including dismantling of defective assembly, replacement of arcing contacts, adjustment of contact pressure, inspection of interrupter chamber, contact resistance test, timing test, functional operation and commissioning complete including labour, consumables, transportation, T&P and incidental works all as specified and directed by Engineer-in-Charge.

Supply and replacement of contact pressure spring kit suitable for 11 KV VCB, including dismantling of spring assembly, replacement of springs, adjustment of spring tension, checking contact pressure, functional operation, testing and commissioning complete including labour, transportation, consumables and incidental works all as specified and directed by Engineer-in-Charge.

Supply and replacement of operating rod and insulated pull rod suitable for 11 KV VCB, including dismantling of existing operating rod, replacement with OEM compatible insulated operating rod, adjustment of linkage mechanism, checking of alignment, breaker timing test, functional operation and commissioning complete including all labour, transportation, consumables, tools & plants and incidental works all as specified and directed by Engineer-in-Charge.

Supply and replacement of closing coil suitable for 11 KV vacuum circuit breaker up to 630/800 Amps, including dismantling of defective coil, installation of new closing coil, reconnection of control wiring, tightening of terminals, checking of control voltage, functional testing, breaker closing operation test and commissioning complete including supply of fixing materials, labour, transportation, consumables, testing instruments and incidental works all as specified and directed by Engineer-in-Charge.

Supply and replacement of trip coil (shunt trip coil) suitable for 11 KV vacuum circuit breaker up to 630/800 Amps, including dismantling of defective trip coil, installation of new trip coil, reconnection of control wiring, adjustment of operating mechanism, testing of trip circuit, breaker tripping test, commissioning complete including labour, transportation, consumables, tools & plants, minor accessories and all incidental works all as specified and directed by Engineer-in-Charge.

Supply and replacement of under voltage release (UV) coil suitable for 11 KV vacuum circuit breaker up to 630/800 Amps, including dismantling of defective UV coil, fixing of new UV coil, adjustment of operating mechanism, testing of undervoltage protection, functional operation, commissioning complete including all labour, transportation, testing, consumables, hardware, tools & plants, minor accessories and all incidental works all as specified and directed by Engineer-in-Charge.