bids are invited for operation and maintenance power house / power plant - 1320677 - pre overhauling, centrifuging activities. , draining & refilling of transformer oil of gt-10 after its centrifuging. , filtration of transformer oil up to bdv>75 kv , dismantling and assembly of hv/lv links, jumper, and bellows etc. , dismantling and assembly lv and neutral bushing lv turret, etc. (proper replacement of gasket and ‘o rings) and replacement of wti, oti, buchholz relay, rprr, etc. along with replacement of all three-phase bushing off seal and rubber bus duct bellows , replacement of gaskets of oil header pipelines, all inspection cover of gt-10 top cover & revisioning of both butterfly valves. , dry out process of gt-10 until dew point of (-20 degree c) is achieved. , overhauling of radiators (32 nos.) as per scope of work. , o/h of gt cooling fans & pumps. , o/h of 15.75kv bus duct gt & uat o/s t. g. hall. , dismantling of all the 3 nos. 400kv hv bushing & 01 no. neutral bushing , erection of all the 3 nos. 400kv hv bushing & 01 no. neutral bushing , dismantling and erection of 15.75kv lv bushing. , dismantling and erection of 15.75kv lv turret. , painting of generator transformer unit-10