supply of 3 mva, 33/11kv step down power transformer, 3 phase, 50 hz oil immersed.3 mva, 33/11kv step down power transformer, 3 phase, 50 hz oil immersed.,supply, installation & commissioning of 3 mva, 33/11kv step down power transformer, 3 phase, 50 hz oil immersed, naturally cooled onan core type double wound with copper conductor, +/- 2.5%, +/- 5%, +/- 7.5%, +/-10% off circuit tapping on ht to vary ht, 50/55 c temperature rise in oil and winding respectively, high voltage side connected in delta whereas low voltage side connected in star having vector group reference dyn11 with neutral of secondary winding brought out for earthing outdoor type having proceline bushing on hv side and cable end box on low voltage side with fitting mentioned below transformer confirming to is:2026 or latest and first fitting of oil as per is:355; make-abb, m.e.i., eastern transformer, areva, airen power, etc or reputed make. [ warranty period: 30 months after the date of delivery ]