The switchgear plays a crucial role in the power system. They can not only control, protect, monitor, and measure power lines and major equipment, but also ensure the stable operation of the power system and improve the safety and reliability of equipment. Meanwhile, with the advancement of technology and the development of the power industry, the level of intelligence and automation of switchgear is also increasing. It can achieve intelligent monitoring and remote control of the power system, providing a more convenient and efficient means for the management and maintenance of the power system.

High voltage switchgear is usually composed of main electrical components such as cabinet body, circuit breaker, isolation switch, transformer, lightning arrester, etc. The cabinet is usually made of cold-rolled steel plate or aluminum zinc coated steel plate, which has the characteristics of high protection level, corrosion resistance, dust and water resistance. The interior of the cabinet is divided into multiple functional units, such as the main busbar room, circuit breaker room, cable room, relay room, etc., to facilitate equipment installation and maintenance.