What is the role of circuit breakers in electrical systems?

Circuit breakers play a critical role in protecting electrical systems by interrupting the flow of electricity during situations that could lead to damage or hazards, such as overloads or short circuits. When the electrical current exceeds a certain threshold, the circuit breaker automatically trips, effectively cutting off the electrical supply. This action prevents overheating of electrical components, potential fires, and damage to appliances and devices connected to the circuit.

The function of circuit breakers is not to increase electrical flow, as their primary job is to protect the system from excessive current. They do not regulate power distribution directly, which pertains more to transformers and load management devices. Additionally, circuit breakers do not convert AC to DC; that function is specific to rectifiers. Understanding these distinctions helps clarify the essential protective role circuit breakers serve in maintaining safety and integrity in electrical systems.