What is the function of a circuit breaker?

The function of a circuit breaker is to interrupt the flow of electricity during overloads. When excessive current flows through an electrical circuit, it can create heat that may lead to overheating and potentially cause a fire or damage to the electrical system. The circuit breaker acts as a safety device that detects this overload condition and automatically trips, or opens, the circuit to stop the flow of electricity. This interruption helps prevent possible hazards and protects both the electrical equipment and the environment.

In comparison, supplying power continuously is not a function of a circuit breaker; rather, it is the role of power sources or transformers to provide continuous electricity to circuits. Enhancing signal transmission pertains to communication systems rather than circuit protection, and converting AC to DC is the function of rectifiers or converters, not circuit breakers. Thus, the role of the circuit breaker is vital for ensuring safe and reliable electrical systems by managing current flow and preventing overload damage.