REPAIRING AND OVERHAULING OF 245 KV SF 6 SIEMENS MAKE CIRCUIT BREAKER OF BUS COUPLER AND 100MVA TRANSFORMER II INSTALLED AT 220 KV SUBSTATION SAMBHAL UNDER ETD SAMBHAL

Amount

The following works are to be carried out at 220KV S/S, Sambhal under ETD- Sambhal.

Opening/Dismantling of control valve assembly, cleaning of cap seal cylinder, removal of defective roller, re-fixing of new roller, reassembly of control valve assembly in mechanism, Replacement of control valve seal & bent O-ring, opening of anti-pumping pin assembly cleaning, de-rusting & lubrication of anti-pumping pin assembly. Replacement of spring in anti pumping. opening and cleaning of closing spring, shock absorber, pneumatic cylinder, cleaning of piston & cylinder including their assembly, replacing of oil & O-ring, Opening and reassembling of trip coil assembly after cleaning of its various parts including measurement of resistance, adjustment of trip coil gap. Checking of NRV & Drain valve for air leakage with help of soap seeds. Replacement of NRV and Drain Valve. Checking of air switch i.e. governor switches, low air pressure alarm switch including adjustment. Checking of gas density switch including all adjustment. De-rusting lubrication of horizontal rod assembly & its various linkages, cleaning of bar pins, replacement of circlip. Show operation of circuit breaker with help of manual jack for checking over stroke, wipe, poles traveling etc for satisfactory operation. Also attend gas leakage, if any

TIRUPATI ELECTRICALS

P&H Engineering