supply of outdoor type, plinth mounted, oil immersed, copper wound, non-sealed type (transformer tank body and cover are bolted) distribution transformer,outdoor type, plinth mounted, oil immersed, copper wound, non-sealed type (transformer tank body and cover are bolted) distribution transformer,,outdoor type, plinth mounted, oil immersed, copper wound, non-sealed type (transformer t ank body and cover are bolted) distribution transformer, 500 kva rating, 11kv/415v, 3-phase, 50 hz, prim ary winding in delta and secondary winding in star (vector symbol- dyn11), onan cooled, off-load tap ch anger for variation of hv voltage from +5% to -10% in steps of 2.5%, with all standard fittings as per claus e 20.1 of is 1180 (part 1) and oil temperature indicator & winding temperature indicators, drain-cum- sam pling valve (3/4 inch nominal size thread, is:554) of steel with plug, energy efficiency level-3 and above, co nforming to is 1180 (part 1): 2014 with amendment nos. 1,2,3 and 4.. [ warranty period: 30 months aft er the date of delivery ] ]