What is the function of a circuit breaker?

The function of a circuit breaker is primarily to protect electrical circuits from overloads. This essential safety device monitors the electrical current flowing through the circuit and will automatically interrupt or "break" that circuit when it detects conditions that could lead to damage or fire, such as too high a current (overload) or a short circuit. By shutting off the flow of electricity when a fault is detected, circuit breakers help prevent potential hazards, ensure safety, and maintain the integrity of the electrical system.

Using a circuit breaker instead of fuses, which must be replaced once blown, increases convenience as it can be reset after a fault is cleared. Thus, the circuit breaker is a critical component in electrical systems aimed at safeguarding both equipment and people from the dangers of electric overloads.