procurement of spares and consumables required for maintenance and servicing of breaker mechanism of 10 set of cg make 400kv sf6 circuit breaker with and without pir during aoh installed at 400kv switchyard 2 660mw sstpp stage mppgcl donga procurement of spares and consumables required for maintenance and servicing of breaker mechanism of 10 set of cg make 400kv sf6 circuit breaker with and without pir during aoh installed at 400kv switchyard 2 660mw sstpp stage mppgcl donga , spares for breaker mechanism , torsion + mechanism small spring set , closing holding latch , roller, bearing & bar pin , closing trigger assy , 400kv sp spr som1-5 trigger latch assy , small pawl with bush , big pawl with bush , limit switch assy , close coil , trip coil 1 & trip coil 2 , silastic 1080 100 grams , ratchet wheel assy 400 sp spr , latches all type som 1-5 , tnc switch 400 sp spr , lr switch 400 sp spr , gas density switch , gas pressure gauge , dilo gas valve , o ring p-18 , o ring p-12 , o ring p-7 , catch 400 sp spr , hardware set+circlip set for lem mechanism , operation counter , optional spares , ecentric pawal assembly for mechanism