In electrical systems, what is the main function of a circuit breaker?

A circuit breaker serves the crucial function of preventing electrical overload by interrupting the current flow. This is vital for protecting electrical systems and devices from damage caused by excessive current, which can lead to overheating, short circuits, or even fires. When the current exceeds a predetermined limit, the circuit breaker automatically switches off the electrical circuit, effectively stopping the flow of electricity and safeguarding the system.

Understanding this function is essential, as circuit breakers are key components in ensuring the safety and reliability of electrical systems. Their design allows them to reset and restore the circuit once the fault has been cleared, making them an important tool for maintaining electrical safety in residential, commercial, and industrial applications. The main purpose is not to increase voltage, enhance conductivity, or facilitate connections, but to serve as a protective measure against overloads and faults in the circuit.