A simple switch is linked to either a bimetallic strip or an electromagnet in a basic circuit breaker. The way circuit breakers work is that once the current passing through the circuit is above the allowed limits, the electromagnet will become magnetic and will apply enough force to break the circuit and cut the current flow inside the house. A Circuit Breaker In Which Sf6 Under Pressure Gas Is Used To Extinguish The Arc Is Called Sulphur Hexafluoride Circuit Breake Breakers Pressure Systems Circuit If you have fuses, the excess heat melts a wire inside the fuse, which in turn stops the flow of electricity. How does a circuit breaker work electromagnet . An mcb (miniature circuit breaker) can be reset and uses an electromagnet to open a switch if the current goes above a certain value. How does a residual current circuit breaker work? Some breakers rely primarily on temperature and trip when overheated, but a magnetic circuit breaker uses an electromagnet, or solenoid, to generate...