Metal Clad Switchgear

The switchgear, used in association with the electric power system, or grid, refers to the combination of electrical disconnects, fuses and/or circuit breakers used to isolate electrical equipment. Switchgear is used both to de-energize equipment to allow work to be done and to clear faults downstream.

In an isolating switch for metal-clad, compressed-gas insulated high-voltage switchgear, a mechanical control unit containing a rotatably supported lever arrangement. The lever arrangement locks automatically in a neutral position and retains an auxiliary contact pin until it is released by a guide surface connected to the main contact pin. A mating contact of the auxiliary contact pin is also spring-loaded and follows this auxiliary contact pin somewhat after being released, initially while maintaining the equipotential bonding.