repair and maintenance of ess in m / s area.sub-head : repairing of ht, ocb 400 amp. 11kv ssg make at vidyut bhawan in nirman bhawan zone- 1 part a description of material partmale contact 400 amp. ( as per sample ) 2 female contact tank side ( as per sample ) 3 primary bushing 400 amp. ( as per sample ) 4 hold on catch lever ( as per sample ) 5 spout insulator 400 amp. ( as per sample ) 6 lever set with spring ( as per sample ) 7 rose contact 400 amp. ( as per sample ) 8 ratchet wheel with assemble ( as per sample ) 9 tripping coil with plunzer 24-30 volt dc ( as per sample ) 10 numerical protective relay ( as per sample ) 11 cleaning of cts chambers pts connections ( pt panels ) replacement of pt fuses & tightening of all the contacts of 11kv cable end coating with anti-oxidant treatment etc as required. 12 repairing, servicing, overhauling and testing of 11kv ocb and their operation mechanism i / c replacement of damaged / brunt parts with new parts and associated items as par requirement ofpanel to make operational closing & tripping system & circuit breaker testing of proper functioning tripping of over current & earth fault, after cleaning, oiling, greasing, alignment of breakers in panels, providing minor wiring of relays i / c lamps, selector switches, push buttons and providing minor items like nut-bolts, washers, ferrules etc, as required. 13 add: gst @ 18%