quotation for local purchase of stores / job works repair / maintenance of 400 kva 11 / 0 . 433 kv distribution transformer installed at waldevi pumping installation under ge nrc . , repair of 400 kva 11 / 0 . 433 kv distribution transformer installed at waldevi pumping installation , taking down defective transformer indoor type 400 kva from waldevi pumping distributing & removing of incoming & outgoing ht / lt connection / earthling & carefully removing the transformer from sub-station plinth with arrangement of mobile crane & truck transport the transformer from waldevi pumping station to factory workshop for repair . , draining out the transformer oil from transformer , opening the transformer & tap changer switch off for inspection & testing including replacement of complete oil , rubber gasket of hv / lv side bushing , gasket of top cover etc . by unscrewing nuts & bolts , taking out the core assembly carefully , checking the defects and rectifying it . varnishing with insulating varnish and backing the core winding complete in oven for 24 hours and testing complete . , re-fixing the core in the transformer tank complete carefully , fixing of tap changer switch , top cover with conservator breather complete , re-assembling complete . , replacement of transformer oil of suitable grade for 11 kv transformer superior quality complete . , transporting the repaired transformer from factory / workshop to waldevi pumping sub station with the help of mobile hydra crane & truck to the site & connecting incoming / outgoing ht / lt connection / earthling , installing , testing and commissioning complete on full load .