supply of 245 kv, 1250a 25 mm/kv spare bushing for 160 mva and 100 mva for 220/66 kv power transformer in various 220 kv sub-stations of dnhddpcl , design characteristics of bushing. - type : transformer-outdoor - application : oil-air - insulation: oil-impregnated paper - model: vcd-24501-300/25 - standard: iec 60137:2017 - connection to transformer winding: splitconductor electrical data: - highest system voltage : 245 kv - phase to earth voltage: 142 kv - rated current: 1250 a - rated frequency: 50/60 hz - 1 minute ac withstand test (dry): 505 kv - 1 minute ac withstand test (wet) :460 kv - basic insulation level: 1050 kvp - switching impulse voltage: 850 kvp - rated short-circuit current: 40 ka - rated short-circuit current duration: 3 sec - cantilever test load: 1600 n, 60 second - ct space: 300 mm - minimum creepage distance : 6125 mm - maximum mounting angle to vertical :30 deg. - maximum altitude of operation: 1000 mt.. - ambient temperature: -20 to +50 deg. c - approx. weight (+/-15%): 360 kg -approx. oil quantity: 38 ltr. - insulator shed profile : alternating type according to iec 60815-2