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.

There are various types of switchgear, which can be divided into high-voltage switchgear, medium voltage switchgear, and low-voltage switchgear according to the different voltage levels. High voltage switchgear is mainly used in power systems with voltage levels between 3.6kV and 550kV, medium voltage switchgear is suitable for systems with voltage levels between 1kV and 35kV, and low voltage switchgear is mainly used in systems with voltage levels below 1kV.

A switchgear is an electrical equipment mainly used in power systems (such as power plants, substations, petrochemicals, metallurgical steel rolling, light industry textiles, factories, mining enterprises, and residential communities) to receive and distribute electrical energy, and to control, protect, monitor, and measure power lines and major equipment. The switchgear is an indispensable and important equipment in the power system, which is of great significance for ensuring the stable operation of the power system, improving the safety and reliability of equipment.

As one of the key equipment in the power system, the importance of high-voltage switchgear is self-evident. A reliable high-voltage switchgear can ensure the stable operation of the power system, reduce the occurrence of faults, lower the damage rate of equipment, and improve the safety and reliability of the power system. At the same time, the intelligence and automation level of high-voltage switchgear is also increasing, which can achieve intelligent monitoring and remote control of the power system, providing 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.