bids are invited for custom bid for services - supply of spares and hiring of service engineer (sitc) for overhauling work of ge- vernova (erstwhile areva) make 132 kv circuit breakers (model no gl312f1, type spring-spring) at 220 kv sitarganj substation - aux contact 16no+16nc complete assembly with mounting arrangement , limit switch , plastic gear with pinion & shaft , mechanism & lcc view glass with beading for fixing the view glass , overhauling kit for mechanisms – suitable for overhauling of 03 drive mechanism as per annexure - ii , trip magnet assembly , closing magnet assembly , close latch assembly , nrb hosing assembly , trip latch stage 1 , trip latch stage 2 , dashpot assembly fk3-1 , sealing ring (rain shield) , manual charging gear assembly fk3-1