What is Relay ? | How Does Relay Works ? | Explained In Tamil

Relay

A relay is a Electrical Switch which is used to open or close a circuit with electromechanical relay or electronically.
it is generally used to switch lower current.
It changes their states when energies, from No( Normally Open) to Close or from NC ( Normally Close) to Open.
There are two types of relay

Electromechanical Relays.In electromechanical relays , contacts are opened or closed by a magnetic force.
Solid State Relays.With solid-state relays (SSR), there are no contacts and switching is totally electronic.

A relay is a simple electromechanical switch made up of an electromagnet and a set of contacts. Relays are found hidden in all sorts of devices. In fact, some of the first computers ever built used relays to implement boolean gates.

Relay Construction

There are four parts in every relay:

Electromagnet
Armature that can be attracted by the electromagnet
Spring
Set of electrical contacts
APPLICATIONS

In general, the point of a relay is to use a small amount of power in the electromagnet coming, say, from a small dashboard switch or a low-power

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