What is a relay race?

Generally speaking, it is a switch, which is closed or opened when the conditions are met. The switching characteristics of relays are widely used in many control systems, especially in discrete control systems.

On the other hand, because the electronic circuit designed for a certain purpose needs to interact with some mechanical equipment more or less, the relay also plays an interface role between electronic equipment and mechanical equipment. Relays commonly used in control are usually used for relay control, signal transmission and isolation amplification.

In addition, there are current relays that limit current, voltage relays that control voltage, automobile relays, electromagnetic voltage relays, small relays, power relays, household appliances relays and so on. It is with these different types of relays that we can control different physical quantities and complete a complete control system.

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Classification of relays

Time relays can be divided into several categories according to their working principle and delay mode. We focus on several commonly used categories. According to its working principle, it can be divided into air damping time relay, electric time relay, electromagnetic time relay and electronic time relay.

There are two kinds in common use. Because of its low price, clear principle and low control requirements, air damping time relay and electromagnetic time relay are generally selected.

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