tender for repairing of 12.5 mva cgl make power transformer at iisc bangalore; 1 cat ( a ) -items to be supply and installation 2 dismantling, loading, unloading and transportation of 12.5 mva transformer from iisc to factory and back to iisc, bangalore after repairing etc as required. 3 removal of active parts from tank, cleaning all healthy parts including coils, lamination, tank, tap changer, sleeves and reassembly of core and winding with old healthy and re-wound coils and other new parts in lieu of damaged one including brazing, soldering, sleeving and insulating etc. as required. oven drying of assembled core and winding, reassembly of transformer by tanking the dried core and winding assembly, fixing of all oil valves, fitting of accessories, making terminal connections to external bushings, including routine tests as per is:2026. overhauling scope of the work including labour charges, ovening, heating and vacuum charges including re-insulation and oltc general service as per tender specifications. 4 replacement of electrolyte grade copper coil lv winding with new winding for one phase. 5 replacement of electrolyte grade copper coil hv winding with new winding for one phase. 6 replacement of complete insulation of transformers with new insulation i.e. separators, spacers, spacer lock sticks, coil base & top, axial sticks, coil holding studs, etc, insulation on inner & interlayer of winding including insulation on re-winded hv & lv coils as per latest is standard: is 2026 ( part 3 ) : 2009 &iec 60076-3: 2000 suitable for 66 kv class power transformer. 7 supply and filling of new transformer oil as per is 335. 8 testing of transformer as per is 2026 at factory and site and including commissioning at site etc as required. 9 oil filtration charges at site as per is 2026 etc as required. 10 cat ( b ) - buy back items 11 salvage value of hv & lv old copper winding for 3 phases. 12 salvage value of old oil.