... of body, switches equipment, fuse, tap-changers,all together in a sealed full oil transformer body. Its a kind of ... H.V. operation room, including H.V. bushings, on-load tap changer, off-circuit tap changer, inset fuse, pressure relief valve,oil indicator, thermometer, ... in order to raise the short-circuit withstand ability. Transformer core -- core and winding assembly technology presents years of ...