Difference between relay and circuit breaker? All Questions › Category: Switchgear And Protection › Difference between relay and circuit breaker? 0 Vote Up Vote Down chetan shidling asked 4 years ago I need short information. 1 Answers 0 Vote Up Vote Down chetan shidling answered 4 years ago The relay will sense the fault and gives a signal to the circuit breaker to break or to take action. The circuit breaker will take action to break the circuit and protect the system from short circuit and overload condition.