What is the function of circuit breakers?

The function of circuit breakers is primarily to interrupt current flow during overloads. They are safety devices designed to automatically disconnect electrical circuits when they detect an overload condition or a fault, such as a short circuit. This interruption protects the wiring and devices in the circuit from damage that could result from excessive current.

When too much current flows through a circuit, it can generate heat, potentially leading to equipment failure, fires, or other hazards. Circuit breakers effectively prevent these dangerous situations by automatically tripping the circuit, thus breaking the flow of electricity and allowing the system to reset once the issue is resolved. This key function is essential in maintaining safety and reliability in electrical systems.

The other choices, while related to electrical systems, do not pertain to the specific purpose of circuit breakers. Voltage distribution involves the delivery of electricity from sources to loads, stepping down voltage levels refers to the function of transformers, and enhancing power factor relates to improving the efficiency of power usage but does not pertain directly to circuit protection.