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The Working Principle and Function of Relay

Definition – What is a relay?
Relay is an electrical control device, which is an automatic switching element with isolation function. In this article, we, Wenzhou E-fun, will briefly introduce the working principle, usage and classification of relays, so that people can have a general understanding about our products.

Working Principle of Relay
The operating principle of the relay is to use the electromagnetic effect to control the mechanical contact to realize the purpose of electric on-off.

Function of Relay
* Expansion of the control scope
* Conversion of circuit
* Zoom in
* Integration of signals
* Security protection
* Automation, Remote control and monitoring
* Automatic adjustment

Classification of Relay
A. According to the working principle or structural characteristics, it can be divided into electromagnetic relay, solid state relay, temperature relay, reed relay, time relay, high frequency relay and polarization relay.
B. According to the overall dimensions, it can be divided into miniature relay, sub-miniature relay and micro relay.
C. According to the purpose or usage of the relay, it can be divided into control relay, protection relay and so on.
D. According to the load function, it can be divided into micro power relay, low power relay, medium power relay and high power relay.
E. According to the protection characteristics, it can be divided into sealed relay, closed relay and open relay.
F. According to the input variables, it can be divided into voltage relay, current relay, time relay, speed relay, pressure relay and so on.
Except for the above basic knowledge about the operating principle, usage and classification of relays, there are still a number of detailed information and parameters requesting to discover. And Wenzhou E-fun Electric Co., Ltd. is about to study our chosen field of electric industry in depth, and brings worldwide customers more stable and reliable products of relay, relay sockets, relay modules.

Post time: Jun-28-2022