Switchgear is designed for controlling the electricity supply for domestic and industrial application with safety action like tripping over short-circuits of electrical devices. Initial models of switchgear are the open type and manually operatable. Simple on and off is done by pulling the lever of socket linked to the scale type connector. However, this type of operation is not sufficient for handling high voltage power transmissions in process industries. New models developed present days operate automatically and have long life operation capability to provide safety shutdown of equipment.
Some of the most used switchgear protective devices:- Fuse
- Switch
- Isolator
- Vacuum
- Circuit breaker
- Sulphur Hexafluoride (SF6) switchgear
- Oil model
- Air type