supply of outdoor distribution transformer , 500 kva rating , 33kv / 416v, 3 phase , 50 hz , primary winding in delta and secondary winding in star ( vector symbol dyn11 ) , onan cooled , off-load tap changer for variation of hv voltage from +5% to 10% in streps of 2.5% with all standard fittings as per clause 20.1 of is 1180 ( part-i ) and oil temperature indicator & winding temperature indicators, drain-cum-sampling valve ( 3 / 4 nominal size thread is: 554 ) of steel with plug, maximum total loss of 1430 w at 50% load and 4100 w at 100% load, copper winding , buchholz relay , oil temperature indicator, winding temperature indicator, conforming to is: 1180 ( part-i ) : 2014 with amendment nos 1, 2, 3&4. make: mirzapur, melcon, cg, abb following has to be submitted by the contractor. 1. gad and gtp to be submitted along with the offer 2. type test test report of the same rating of transformer to be submitted from nabl accredited lab. [ warranty period: 30 months after the date of delivery ]