What is the primary role of circuit breakers in electrical systems?

The primary role of circuit breakers in electrical systems is to protect circuits from overload or short circuits. When excessive current flows through a circuit—whether due to an overload, which occurs when too many devices draw power, or a short circuit, which is an unintended path that bypasses the normal circuit—the circuit breaker detects this condition and automatically interrupts the flow of electricity. This interruption prevents potential hazards such as electrical fires, equipment damage, and personal injury.

Circuit breakers are designed to reset after they have tripped, allowing for quick restoration of service once the underlying issue is resolved. This capability makes them essential safety devices in both residential and commercial electrical systems, ensuring the reliability and integrity of electrical installations while also protecting users.