What is the function of a circuit breaker in electrical systems?

The function of a circuit breaker in electrical systems is to interrupt the flow of electricity during faults, which is critical for safety and protection. When an overload or short circuit occurs, the circuit breaker detects the irregularity and automatically cuts off the electrical supply to prevent damage to the system, potential fires, or other hazards. This interruption stops the flow of electricity, thereby averting possible injuries or catastrophic failures in the electrical system.

While enhancing power efficiency, providing backup power, and increasing current flow are related concepts in electrical systems, they do not accurately describe the primary safety function of a circuit breaker. The protection aspect is fundamental to safeguard both equipment and personnel from electrical hazards.