Details: supply, installation, testing and commissioning of copper wounded transformer step up/step down outdoor type capacity 250 kva, 22 kv, 3 phase, iss : 1080(2014) part-i & latest, e.e. level -ii, amendment no 4, 50 c/s oil immersed, natuarally cooled, out door type step down transformer having a no load voltage ratio 22000/433v, vector group dyn 11 with plus minus 2.5 plus minus 5% of circuit tappling as under taken out on the ht side and connected to 22kv off circuit tapping switch, ht winding connected in delta & lt winding connected in star and the neutral brought out & connected to a separate terminal for earthing with outdoor open porcelain bushing on hv side & cable box on lv side with the temperature rise not exceeding 40 degree centrigrade by thermometer in oil and 45 degree centrigrade by resistance & ambient temp 40 degree centrigrade with first filling of oil with following :-(i) fitting and accessories :- (a) first fill on trnasformer oil (b) 22 kv of circuit tapping switch (c
Sector: Defense