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.

High voltage switchgear is an electrical equipment used in the power system to connect, disconnect, carry, and disconnect normal and fault currents. It is mainly used in the distribution system of power plants, substations, petrochemicals, metallurgy and steel rolling, light industry and textile industries to control and protect the power system. The main functions of high-voltage switchgear include controlling the opening and closing of power supply, distributing electrical energy, protecting equipment and circuits from damage, etc.