procurement of 500kva, 33kv 415v and 250kva, 11kv 415v distribution transformer for btps township under capex-2023-24. , outdoor type distribution transformer for power supply 250 kva, 11 / 0.433 kv dyn11, oil-filled outdoor type additional data: crgo core type, double copper wound, transformer having voltage ratio 11000 / 433 volts, tapping at hv side +5% to -5% @ 2.5% through off circuit tap changing switch, 3 phases, 50 hz, ac supply, onan cooled, vector group dyn 11, outdoor type ( ht: bare bushing, lt: cable box ) , complete with all standard fittings & first filling of transformer oil and built in accordance latest is-standard, energy efficiency level-2. , transformer, 500kva, 33kv / 415v, dyn11, 50hz 3ph, delta / star, tapping:: +3% to -9%, percentage impedance: 5%, outdoor, cooling:o / n, energy efficiency level-ii, with all accessor