Details: replacement of gasket, improvement of insulation resistance, diagnosis and removal of any internal thermal fault of 10 mva, 33kv/6.6kv eef make transformer, sr.no. 401001 dismantling of all hv and lv cables, bushing terminal boxes, top cover, conservator, radiator etc from the main tank using proper arrangement lifting the top cover of transformer for inspection the core assembly. lifting the core and coil assembly, tightening all yoke bolts pressure bolts etc. finding of fault, rectification and putting the core and winding into the transformer tank replacement of all gaskets by new gaskets rc-70 c grade labour cost for replacements of all gaskets by new gaskets. rc-70 c grade @ 20 % draining old oil from the transformer cleaning of sludge by flushing of transformer & washing of core and coil assembly with hot oil heating of transformer tank & improvement of insulation resistance of winding by repeated vacuum and nitrogen purging method refixing of all hv & lv cables, bushing termi
Sector: Mining