At present the technical standards of the vacuum switchgear aspects are: GB3906-91 3 ~ 35kV AC metal enclosed switchgear DL404-91 Indoor AC High Voltage Switchgear order technical conditions of technical parameters and switching refuse breaker similar technical parameters, according to the loaded trip the parameters set, the only difference is, low voltage switch cabinet installation, switch refused according to the rated current of the main circuit in the electrical components (such as isolation switch, or current transformer) The minimum value of the rated current. 2. The high-voltage vacuum switch refusal of type high pressure vacuum switch, there are three classifications, each category there are several basic types, each of which has its own characteristics. GCK Low-voltage withdrawable switchgear ※ PURPOSE: GCK AC low-voltage power distribution equipment for power plants, substations, industrial enterprises and other power users of AC 50Hz, rated working voltage of 400V, Shangcai low voltage, rated current up to 3200A distribution system, as power, lighting and power distribution equipment, power conversion, distribution and control purposes. ※ The main structural features: GCK Low-voltage withdrawable switchgear divided by function powered cabinet, the power supply cabinet (PC Cabinet) and a motor control center (MCC cabinet) cabinet. Accepted by the cabinet mainly play the role of power. Feed cabinet (PC Cabinet) levels inside the bus compartment located at the top front. Located in the rear of the cabinet vertical bus room. After the lower part of the cabinet has a bottom with a rubber ring, low voltage switch cabinet how? For the next cable outlet. Motor control center (MCC cabinet) by the horizontal bus compartment, vertical bus room, functional unit room and cable chambers, low pressure switch procurement, the level of bus room at the top of the cabinet front, vertical bus room located in the rear of the cabinet functional unit room for connecting the main circuit and functional devices plug connection. Vertical bus GCK Low-voltage withdrawable switchgear, placed in a closed compartment made of a metal plate. After the compartment cover can be opened between the main bus or bus cabinet-site installation and connection is very convenient. Horizontal bus compartment including A, B, C, N phase, which supported by the bus folder. Vertical bus rounded rectangular copper, placed in a closed compartment made of a metal plate. 8E / 2 drawer connected via adapter box with vertical busbars. Main protective earth bus PE line located in the lower cabinet, the branch of the neutral line N and protection PE ground bus mounted vertically in the cable chamber. Separated by insulator between the N line and PE line, the N line and PE lines are using; as with short-circuit between the two conductors, Serve PEN line. Low voltage switch cabinet model, learning Connaught Electrical and Mechanical (online consultation), low voltage provided by the Henan Shangcai learning Connaught Electrical and Mechanical Equipment Co., Henan Xi Connaught Electrical Equipment Co. (www.hnxinuo.com) is Zhengzhou, electronics, electrical products processing leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In practice Connaught Electrical and Mechanical leadership with the staff warmly welcome all inquiries negotiations to create learning Connaught Electrical and Mechanical better future.