What is an overcurrent protection device?

An overcurrent protection device is specifically designed to safeguard electrical circuits by interrupting the flow of current when it exceeds a predetermined safe level. This function is crucial for preventing damage to electrical components and minimizing fire hazards created by excessive current. By interrupting the circuit, these devices help ensure that electrical systems operate within their safe limits, thereby extending the lifespan of equipment and improving overall safety. Common examples of overcurrent protection devices include circuit breakers and fuses.

The other choices are not aligned with the function of overcurrent protection devices. For instance, a device that exclusively measures voltage does not serve a protective role, while the devices that regulate temperature or increase current flow do not address the need to interrupt potentially harmful overcurrent conditions in a circuit.