Earthing Switch Operating Mechanism Interlocking Device
The earthing switch interlocking device is an important device used to prevent misoperation and ensure the safe operation of the power distribution switchgear.
Function and effect
Prevent misoperation: Avoid closing or opening the earthing switch at inappropriate times, preventing the earthing switch from being closed when the circuit breaker closed, or the circuit breaker from being closed when the earthing switch is closed, so as to ensure the safety of personnel and equipment.
Ensure the operation sequence: Ensure that the earthing switch and other related equipment (such as circuit breakers, disconnectors, etc.) are operated in a predetermined sequence and comply with the safety operation procedures in power system.
Application scenarios
High-voltage distribution cabinet: In high-voltage power systems, due to the high voltage level and large short-circuit current, the consequences of misoperation are extremely serious. Therefore, the grounding switch operating mechanism interlocking device is an indispensable component of the high-voltage distribution cabinet and is widely used in high-voltage switch cabinets in substations, power plants and other places.
Low-voltage distribution cabinet: In some low-voltage distribution systems with high requirements for power supply reliability and safety, such as hospitals, shopping malls, data centers, etc., grounding switch operating mechanism interlocking devices are also used to prevent power outages and personnel safety issues caused by misoperation.
