The role of the relay

The relay is an automatic switch element with isolation function. It is widely used in remote control, telemetry, communication, automatic control, electromechanical integration, and power electronic equipment. It is one of the most important control elements. Relays have the following functions:

1, to expand the control range; for example, when the multi-contact relay control signal reaches a certain value, you can press the contact group in different forms, at the same time changeover, open, open multiple circuits.

2, amplification; for example, sensitive relays, relays, etc., with a very small amount of control, can control a large power circuit.

3, integrated signal; For example, when a plurality of control signals input the multi-winding relay according to the specified form, after comparing and integrating, reach the predetermined control result.

4, automatic, remote control, monitoring; for example, the relay on the automatic device together with other electrical appliances, can form a program control circuit, in order to achieve automatic operation