What is the main function of a circuit breaker within an electrical system?

The main function of a circuit breaker in an electrical system is to protect circuits from overcurrent or faults. When the current flowing through a circuit exceeds a predetermined level, which can happen due to short circuits, overloads, or faults, the circuit breaker automatically interrupts the flow of electricity. This action helps prevent damage to wiring, devices, and appliances, as well as reduce the risk of fire and other hazardous conditions that can arise from excessive current.

Circuit breakers serve as a safety device that ensures the integrity of the electrical system. By tripping and disconnecting power when necessary, they keep the electrical installation safe and operational. This functionality is critical in maintaining the overall reliability and longevity of any electrical system.