In protection circuits, what is the main function of relays?

The main function of relays in protection circuits is to isolate and protect components. Relays serve as automatic switches that open or close circuits in response to certain electrical conditions. In the context of protection circuits, they are critical for safeguarding electrical systems from overcurrent, short circuits, and other fault conditions. When a relay detects an anomaly in the electrical characteristics of the circuit—such as excessive current flow—it activates to disconnect the power supply, thereby preventing damage to components and maintaining safety within the system.

This ability to act as a protective mechanism helps in ensuring the reliability and longevity of electrical equipment, making relays an essential component in various electrical and electronic systems. Their role goes beyond mere switching; they also help in monitoring conditions and responding accordingly to safeguard against faults.