supply of supply of 500kva, 33kv/415v, 3-phase,supply of 500kva, 33kv/415v, 3-phase,,supply of 500kva, 33kv/415v, 3-phase, 50hz, ac, outdoor type, plinth mounted, oil immersed, non-sealed type distribution transformer, primary winding in delta and secondary winding in star, copper woun d, onan cooled, energy efficiency level-3 and above conforming to is: 1180(part-1):2014 with amendment no s. 1,2,3,4 and latest and supplied with all standard fittings along with oil temperature indicator & winding temperat ure indicators, drain-cum-sampling valve of steel with plut, terminal arrangement. the transformer shall be fitted with high voltage and low voltage sides with bushings of appropriate voltage and current rating. suitable cable en d box is to be provided in lt side. tap changer: off load tap changer for variation of hv voltage from +5% to -10 % in steps of 2.5%. make:- abb india limited/kirloskar electric company ltd./siemens limited/crompton greav es limited or similar [ warranty period: 30 months after the date of delivery ]