bids are invited for thorough inspection - testing and checking of the above 400 kva copper wound transformer , transportation charge - for transformer from bsnl sanchar sadan budh marg patna to workshop at patna , lifting of transformer - core and coil asssembly including removal of all the burnt hv and lv coils , draining out the existing - unserviceable transformer oil including cleaning the tank core assembly , rewinding of copper wound lt coils - 50 kg per coil for 3 coils with the matching of existing gauge with electrolytic high conductivity paper insulated , rewinding of copper wound ht coils - 13 kg per coil for 12 coils with the matching of existing gauge with electrolytic high conductivity paper insulated , replacement of worn out - gaskits crape tape cotton tape press board with new one , replacement of lv bushing - 1point1 kv with studs copper complete with nut washers oil seal and cap fitting , replacement of hv bushing - 12 kv with studs copper complete with nut washers oil seal and cap fitting , reassembling and fitting - rewinded transformer core with accessories bushing stud including paper and press boards , replacement of existing faulty changeover switch - new 630 a on load 4 pole changeover switch open execution type , heating of core and winding - assembly in heat chamber in order to remove all traces of moisture from the insulations , supplying and pouring - transformer oil as per is 335 duly filtered thoroughly before topping up oil , painting of complete outer surface - with epoxy primary coat & finish coat with enamel paint matching with existing colour , transportation charges for repaired - repaired 400 kva transformer from workshop to sanchar sadan budh marg patna , re-installation of the above repaired - 400 kva copper wound transformer on the existing plinth of the substation including shifting from campus to the plinth with the help of suitable man power chain pulley tools ms channel total quantity : 824