FOR OVERHAULING/MAINTENANCE OF 33KV VCB INSTALLED AT 220KV SUBSTATION SARH KANPUR UNDER ETD-II, KANPUR.

Following works are required for proper health checking & avoid unwanted breakdown of 06 Nos. 33KV VCB at 220KV substation Sarh Kanpur under ETD-Kanpur. 1. Checking and adjustement of snatch gap travel of drive insulators rod of each pole. 2. Replacement of all damaged and defective parts closing latch assembly, strip latch, close coil etc. and its proper adjustment cleaning and greasing. 3. Oiling and greasing of crank gear by opening of lock, clip etc. 4. Dismanteling of all pole linkage, pins and rod assembly, cleaning greasing and its proper adjustment. 5. Check satisfactory trip & close operation of the breaker both by local/remote. 6. Check close/trip timing of digtal timer kit. 7. Repairing of mechanism for rectification of mechanical problem after overhauling of VCB following test to be carried out. (a) Opening and closing timing of each pole of VCB (B) Carrying of contact resistance measurement of each pole of VCB. (C) Checking of megger value of each Pole of VCB.

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