What is the function of a circuit breaker?

A circuit breaker is designed specifically to interrupt the flow of electricity to prevent overload conditions that could lead to hazardous situations such as electrical fires or equipment damage. When the current exceeds a safe level, the circuit breaker automatically disconnects the electrical flow, ensuring that the circuit is protected from excessive current that can cause overheating and damage to electrical systems.

While certain devices, like transformers, can increase electrical flow, that is not the primary function of a circuit breaker. Measuring electrical current is typically the role of ammeters or similar devices, and storing electrical energy is associated with batteries and capacitors. Therefore, the primary role of a circuit breaker is truly to ensure safety by interrupting the flow of electricity under overload conditions, making it an essential component in electrical systems.