Medium-voltage switchgear is equipment used for switching and control in medium-voltage power systems. Medium-voltage switchgear refers to high-voltage complete switchgear with voltage levels ranging from 3.6 to 40.5 kV. Medium-voltage switchgear can be divided into several types based on their function and application. Below is a brief introduction to several common types of medium-voltage switchgear.
Metal-Enclosed Switchgear
Metal-enclosed switchgear is a common type of switchgear widely used in medium-voltage power distribution systems. Enclosed by a metal casing, it offers excellent protection and insulation. Metal-enclosed switchgear typically includes components such as circuit breakers, disconnectors, and protective devices for power control, line protection, and fault isolation.
SF6 Gas-Insulated Switchgear
SF6 gas-insulated switchgear uses SF6 gas as its insulating medium and is widely used in medium-voltage power systems. SF6 gas has high insulation properties and arc-extinguishing capabilities, giving this type of switchgear excellent arc resistance and a compact design. It is commonly used in power supply stations, industrial plants, and other locations to control and protect various equipment and lines in the power system.
Solid insulated switchgear uses solid insulation materials instead of traditional gas or oil dielectrics, offering enhanced safety and environmental performance. This type of switchgear is often used in applications requiring higher safety and reliability, such as subway systems and tunnel power supply systems. It utilizes solid insulation materials, such as ceramic tiles and organic insulating materials, to effectively isolate electrical equipment from the external environm