Difference between isolator and circuit breaker? All Questions › Category: Switchgear And Protection › Difference between isolator and circuit breaker? 0 Vote Up Vote Down Chetan Shidling Staff asked 4 years ago I need short information. 1 Answers 0 Vote Up Vote Down Chetan Shidling Staff answered 4 years ago The isolator is operated at no load and the circuit breaker is operated at full load.