A circuit breaker is a safety device designed to interrupt the flow of electrical current in a circuit when an overload or short circuit occurs. Its primary function is to prevent damage to electrical wiring and appliances, as well as to minimize the risk of electrical fires. For example, if a faulty appliance draws excessive current, the breaker will activate, cutting off power to that circuit.
The proper functioning of these devices is crucial for maintaining electrical safety in residential, commercial, and industrial settings. By immediately stopping the flow of electricity during abnormal events, they safeguard property and protect individuals from potential harm. The development and widespread adoption of these protection measures significantly reduced electrical hazards compared to earlier electrical systems that lacked such safeguards.