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What are relays?

Navigation Info - a relay is a spare part or electrical component that functions to disconnect and connect electric currents by utilizing an electromagnetic field, the same as a contactor, but in terms of size and also the electrical power supplied. use is very small plus NC connectors and NO relays are only able to withstand small electrical power as well.

Relay
What are relays?

Types of relays based on current consumption 


The relay itself is divided into 2 types if we monitor from the use of the type of electric current, namely:

1. AC relay ( alternating electric current / PLN )


First type namely AC relays or relays that use alternating electric current or PLN to power the input coil.

AC relays are most commonly used in industrial machines in manufacturing companies which on average use electricity from PLN or AC current because AC relay coils generally use 220 volts of electricity.

2. DC relays ( direct current / battery )


General DC relays we can find out what electronic devices at home and also motorized vehicles use a DC relay (battery current / direct electric current).


Not infrequently also some industrial machines use a DC relay as a connecting component and disconnect the electric current for the coil itself DC relay usually uses a voltage of 12 volts / 24 volts.

Industrial machines that use DC relays are usually equipped with transformers or adapters to change the current AC is converted to DC current in order to use DC relays.

If monitored from the stability of the electric current, DC relays are far superior, but if judged from an economic and practical point of view, AC relays are superior, the point is that there are advantages and disadvantages to both.

Note: For the power input relay itself, it must match the electric current used because if you give the wrong electric current the relay cannot works or even explodes.

Sections relay 


The relay parts are almost the same as the contactor but the code sequence is different. For more details you can read it below

Coil relay


Coil relay serves to become an electric magnet that will attract NC and NO connectors so that they can operate according to their functions.

As for the electric current itself, it uses an electric current according to the type of relay you are using, namely 220 volts AC and 12/24 volts DC.

Normaly open ( NO )


Relays also have NO connectors as well as contactors which function to connect and disconnect electric current.
 
when the relay coil has not received an electric current the NO connector if you tester using an ohm meter it will not connect otherwise if the relay coil gets an electric current then the NO relay will be connected if we tester using an ohm meter or multi tester.

Normaly Close ( NC )


Relays also have NC connectors just like contactors which function to connect and disconnect electric current .

pa da when the relay coil has not received an electric current from the NC connector if you tester using an ohm meter it will connect otherwise if the relay coil gets an electric current then the NC relay will be disconnected or not connected if we tester using an ohm meter or multi tester.

But basically it functions to disconnect and connect the electric current, you just vary it to create an electrical circuit that you want.

Relay stand


What distinguishes a relay from a contactor the most is that there is a holder to connect the relay to other electrical devices, unlike contactors that don't need it.

In terms of repairing the engine to replace a damaged relay, it is very easy because there is a relay holder, you just need to remove the relay and replace it with a new one.

It's very different if you use a contactor that uses a lot of smell it will take a long time to replace it.

That's a little bit of information about relays that I can share with you guys if you want to add them. can comment below and t Thank you for visiting our blog.
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