Principal of circuit breaker

Question

Describe the working principal of circuit breaker?

Answer 1

Circuit Breaker refers to the one that makes or breaks circuit. It consists of the two contacts which include fixed contact and moving contact. In normal condition, moving contact comes in contact along with the fixed contact hence making the closed contact for flow of the current. At the time of abnormal and faulty conditions (when the current exceeds  the rated  value)  an  arc  is  generated  between  fixed  and  moving contacts  and  hence,  it  makes  the  open  circuit.