- The figure above shows the structure of a circuit breaker.
- A circuit breaker is an automatic switch that cut off current in a circuit when the current becomes too large.
- When the current in a circuit increases, the strength of the electromagnet will increase in accordance; this will pull the soft iron armature towards the electromagnet.
- As a result, the spring pulls apart the contact and disconnects the circuit immediately, and the current stop to flow.
- We can reconnect the circuit by using the reset button. The reset button can be pushed to bring the contact back to its original position to reconnect the circuit.