bids are invited for repair of transformer 1 disconnecting ht and lt supply taking down defective transformer (indoor/outdoor type) from four pole/two pole structure or lifting from the outdoor type foundation or taking out from sub station bldg, using a crane of suitable capacity & slings/ropes etc as required and shifting the same to civil workshop for repairs complete all as directed for transformer capacity 400 kva 2 shifting back the repaired transformer + (indoor/outdoor type) from civil workshop to site reinstalling at original position and fixing properly on four pole/two pole structure or outdoor type foundation or inside a sub station bldg, using a crane of suitable capacity & slings/ropes etc 85 required, making ht/lt side connections and testing for satisfactorily working complete all as directed for transformer of capacity 400 kva 3 draining out transformer oil from the transformer & storing the same in suitable containers (to be arranged by contractor without any extra cost).. opening the top cover and lifting up the core assembly carefully to check the condition of transformer windings and core, retanking the same after repairing, checking of leakage from transformer body and repairing/welding works required for making transformer body leak proof, refilling the transformer oil dully dehydrated and filtered (dehydration and filteration to be paid separately) & making all connections with ht/lt side bushings, refixing the top cover, and testing the transformer with a suitable capacity insulation tester complete all as directed for transformer of cap 400 kva total quantity : 858