Different switching devices in switchgear for power system
What is switchgear? In electrical system, switchgear is the combination of electrical switches, fuses and circuit breakers used to control, protect and isolate electrical equipment. Switching devices are used to make or break electric circuits 1. Classification of switching devices according to operation: No-load switching Breaking at operating currents Breaking at short circuit currents 2. Classification of switching devices according to function: Circuit Breaker: A circuit breaker is an electrical switch which designed to protect an electric circui t from damage caused by excess current from an overload or short circuit. Its basic function is to make, break and carry current under normal and abnormal conditions. Switches: Switches are used to switch current between two feeder or break current in circuit. Disconnectors or Isolators: Isolator is an offload mechanical device used to physically disconnect an electrical circuit