What is the purpose of circuit protection devices?

The purpose of circuit protection devices is to prevent overcurrent situations. This is vital because overcurrent can damage electrical components, lead to overheating, and even cause fires. Circuit protection devices such as fuses, circuit breakers, and thermal overload relays are specifically designed to interrupt the flow of electricity when it exceeds a preset level.

When an excessive current flows through a circuit, these devices detect the anomaly and act to disconnect the circuit, thereby protecting the wiring and connected devices from potential damage. Ensuring that circuits operate within safe current levels is essential to maintain safety and ensure the longevity of electrical systems.

In contrast, regulating voltage supply, amplifying electrical signals, or measuring electrical resistance are functions associated with other types of devices and do not relate to the core purpose of circuit protection.