What does a circuit breaker do?

A circuit breaker serves the critical function of automatically stopping the flow of electricity when it detects an overload or short circuit. This protection mechanism is vital for preventing damage to the electrical system and reducing the risk of electrical fires. In the event of excess current, the circuit breaker interrupts the circuit, cutting off power and ensuring that wires and devices are not subjected to conditions that could lead to overheating or failure.

This automatic operation enhances safety, as it eliminates the need for manual intervention during unsafe conditions. By reacting quickly to overload situations, circuit breakers preserve the integrity of the electrical circuits and protect connected devices. Therefore, this function makes them an essential component of modern electrical systems.