supply of outdoor type, plinth mounted, oil immersed, copper wound, non-sealed type etc.outdoor type, plinth mounted, oil immersed, copper wound, non-sealed type etc.,outdoor type, plinth mounted, oil immersed, copper wound, non-sealed type (transformer tank b ody and cover are bolted) distribution transformer, 500 kva rating, 11kv/415v, 3-phase, 50 hz, primary windi ng in delta and secondary winding in star (vector symbol- dyn11), onan cooled, off-load tap changer for vari ation of hv voltage from +5% to -10% in steps of 2.5%, with all standard fittings as per clause 20.1 of is 1180 (p art 1) and oil temperature indicator & winding temperature indicators, drain-cum- sampling valve with steel plug, energy efficiency level- 2 and above, conforming to is 1180 (part 1): 2014 with amendment nos. 1,2,3 and 4. or l atest. [ warranty period: 30 months after the date of delivery ] ]