What is circuit breaker?

Basically circuit breaker is an essential part of electrical circuit. And it is a device which is used as a protective switch for passing electric current with checking of tripping conditions.

Usually the circuit breaker detects a trip condition, the breaker opens its contact and separates the input as well as the output voltage from each other contact.

So, the basic function of a circuit breaker is to interrupt the current flow once a fault is detected. It remains open until the user resets the trip.