What is the primary function of a circuit protection device?

The primary function of a circuit protection device is to prevent dangerous levels of current, voltage, or power from affecting the circuit. This is essential for safeguarding both the circuit itself and any connected devices from damage that could occur due to overloads, short circuits, or surges. By interrupting the flow of electricity when harmful conditions are detected, circuit protection devices, such as fuses and circuit breakers, help maintain the safety and integrity of the electrical system.

Increasing current flow, isolating components, and measuring voltage drops are important functions in electrical systems but do not directly address the protective role that circuit protection devices serve. Their primary purpose is focused on ensuring safety and preventing damage, which is why option C accurately describes their main function.