Which of the following describes a function of circuit breakers?

A circuit breaker is a crucial safety device designed to protect electrical circuits from damage caused by overloads or faults. When there is an excessive current flow—typically due to a short circuit or an overload—the circuit breaker detects this condition and automatically interrupts the current. This disconnection prevents overheating, electrical fires, and damage to appliances and wiring systems.

The function of disconnecting power during such events is vital for maintaining the safety and integrity of electrical installations. By doing so, circuit breakers help ensure that the risk of electrical hazards is minimized, allowing for safe operation of electrical systems.

The other options do not accurately describe the function of circuit breakers. They do not increase voltage, regulate energy flow, or create short circuits intentionally. Each of these activities pertains to different electrical components or concepts that serve distinct purposes within electrical systems.