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.