What is the main protective function of circuit breakers?

Circuit breakers mainly play a role in protecting the safety of circuits and electrical equipment. In the event of circuit overload, voltage instability, or equipment leakage, the circuit breaker will automatically cut off the power supply to prevent accidents from expanding and protect the safety of circuits and electrical equipment. Circuit breakers belong to a type of switching device, mainly including residual current circuit breakers, Ec100 miniature circuit breakers, surge protectors, and other different types.