Details: work of designing the circuit with contactor/overload relay/fuse/mcb/selector switch for proper operation of cooling ofan with wti & oti and testing and replacement of defective wti and replacement of old and defective cables of the wti/oti/buchholz/prv/mog/osr alarm and trip, including replacement of faulty cable of marshalling box of 20mva telk make t/f at 132 kv mehdawal with all associated work. dismantling of old wiring from marshalling box work includes wti/oyi/buchholz/mog/osr and all damaged contractor, wiring, fuses all other accesseries etc. supply and fixing of 3 no+1nc three phase for contractor for cooling fan (pick up potential 250v/ac/9a) of standard make. supply and fixing of 3 no+1nc three phase for auto/manual mode selection (pick up potential 250v/ac/32a) of standard make. supply and fixing of three phase mcb (4 pole/415v ac/32a) supply and fixing of overload relay for fan (6-12a) supply and fixing of selector switch for auto/manual selection(2 way/2w/415a ac/10a) su