220kv power transformer

220kv power transformer:Feature: 220kv on-load-tap-changing power transformer is made of high-quality silicon-steel sheets,and laminated by steps,it is advantageous in low loss,low noise ,low voltage partial discharge and high anti short circuit capacity.the dynamical and thermal stability of this transformer ,of which the coils are winded by high-quality oxygen-free copper wire as well as used pre-compressing brackets processes and interior and exterior structure.the transformer tank used wave form shell.has very nice appearance ,the core is with D shape yoke and 45 angle seaming,the core and oil box are well fixed . 500420000/220kv series three phase duplex winding regulating transformer with load: Rated capacity (KVA) Voltage connction 9-type KW 10-type KW 11-type KW No-load current (%) Impedence voltage(%) H.V (KV) L.V (KV) No- Load Loss Load-Loss No- Load Loss Load-Loss No- Load Loss Load-Loss 31500 220 240 ±2×2.5% 6.3 YNd11 35 135 31.5 128.3 28 128.3 0.7 12 14 40000 6.3 41 157 36.9 149.2 32.8 149.2 0.7 50000 10.5 49 189 44.1 179.6 39.2 179.6 0.65 63000 11 58 220 52.2 209 46.4 209 0.65 75000 10.5 67 250 60.3 237.5 53.6 237.5 0.6 90000 11 77 288 69.3 273.6 61.6 273.6 0.55 120000 11 94 345 84.6 327.8 75.2 327.8 0.55 150000 13.8 112 405 100.8 384.8 89.6 384.8 0.5 160000 11 117 425 105.3 403.8 93.6 403.8 0.49 180000 13.8 128 459 115.2 436.1 102.4 436.1 0.46 240000 15,75 160 567 144 538.7 128 538.7 0.42 300000 18 189 675 170.1 641.3 151.2 641.3 0.38 360000 20 217 774 195.3 735.3 173.6 735.3 0.38 370000 15.75 221 790 198.9 750.5 176.8 750.3 0.38 400000 18 234 837 210.6 795.2 187.2 795.2 0.35 4200000 20 242 868 217.8 824.6 193.6 824.6 0.35 31500180000/220kv series three phase duplex winding regulating transformer with load: Rated capacity (KVA) Voltage connction 9-type KW 10-type KW 11-type KW No-load current (%) Impedence voltage(%) H.V (KV) L.V (KV) No- Load Loss Load-Loss No- Load Loss Load-Loss No- Load Loss Load-Loss 31500 220 240 ±2×2.5% 6.3 YNd11 38 135 34.2 128.3 30.4 128.3 0.7 12-14 40000 10.5 45 157 40.5 149.2 36 149.2 0.63 50000 35 54 189 48.6 179.6 43.2 179.6 0.56 63000 38.5 63 220 56.7 209 50.4 209 0.56 90000 10.5 80 288 72 273.6 64 273.6 0.49 120000 11 99 346 89.1 328.7 79.2 328.7 0.49 150000 35 116 405 104.4 384.8 92.8 384.8 0.42 180000 38.5 135 468 121.5 444.6 108 444.8 0.42