The structure of this product is assembled by the welded bending steel plate formed by the bolts and the whole body includes the fixed shell and hand-car with the wheels. And it is divided into hand-car room, busbar room, cable room and relay instrument room. The shell protection has reached the P2X, and has high parameter, high system and reasonable structure. The positive part of the cubicle has relay and instrument cubicle, and the hand-car room and the pressure release channel is under the door. The observation window is on the door, the second cable incoming is on the left bottom. The main busbar room is on the top of the back of the cubicle, and the cable-room is on the end. The observation window is installed in the closure panel and there is no interlocking on the under closure plate and the earth switch, the instrument plate can be installed with the charged display devices. The top closure panel can not be demolition when the busbar is charged. The hand-car is formed by bending welded steel plate, and the end is installed with four steels, ground contact-oriented devices, and pedal lock structure，and climbing of hand-car lever promote deduction. The hand-car is easy to be operated and the interlocking is reliable. The hand-car is classified as insulation hand-car, voltage mutual induct hand-car and voltage transformer arrester hand-car, mining hand-car and grounding hand-car.