![]() There are many types of relay and each relay has its own application, a standard, and generally used relay is made up of electromagnets which in general used as a switch. ![]() ![]() Again this working principle of relay fits only for the electromechanical relay. It consists of a flexible moving mechanical part which can be controlled electronically through an electromagnet, basically, a relay is just like a mechanical switch but you can control it with an electronic signal instead of manually turning it on or off. Despite the differences in construction, the basic working principle of a relay is the same, so lets discuss more on basic relay operation and take a deeper look into its constructionĪ Relay is an electromechanical device that can be used to make or break an electrical connection. But, this is a very generalized statement, there are many types of relays and each relay behaves differently as required for its application, one of the most popularly used relays is the electromechanical relay and hence we will focus more on that for this article. To put it in general, relays are just like any other switch which can either make or break a connection, that is it can either connect two points or disconnect it, therefore relays are commonly used to turn on or off an electronic load. From a small traffic signal controller to a complex high voltage switchyard, relays can be found everywhere.
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