Circuit braker

Introduction of circuit breakers

All electric circuits needs a switching device and also a protective device. Switchgear is the general term covering a wide range of equipment connected with switching and protection. A circuit breaker is a switching and circuit interrupting device. A circuit breaker serves two purposes:

 Switching on and off during normal operation for maintenance etc.

 Switching during abnormal conditions- short circuits, earthing etc. to protect the associated equipment.

In short, a circuit breaker is a sort of automatic switch which can interrupt the fault currents. Two important parts of a circuit breaker that need consideration are:

Arc extinction system

Relay for operation