types of relay

Different Types of Relays and their Working Principles

Basically, Relay is open and close contact, to find out inside the relay circuit, and use relay into different purpose in electrical industry.

This open and close is also called (normally open) and normally closed) and inside relay find out one coil. This coil purpose is to make an electromagnet in the core when electrical power is applied in the coil, and NC and NO is an interchange that means, NC contacts convert NO, and NO contacts convert NC, this conversion is basically called make and break the circuit or on/off the circuit.

Types of the relay.

Basic relay  or Electromagnetic

Basic normally relays to find out in different  on/off contacts that are:

          (SPST,SPDT,DPST,AND DPDT)

These phenomena you can also be read in my article in types of switches

Solid State Relay 

consists of solid-state components like an integrated circuit(IC)

It is accustomed to perform change operation with none movement in its elements.

Its power gain is more than the magnetic attraction relays as a result of it needs low power as in input and provides high power at the output.

 Hybrid Relay

 

 Hybrid Relay is made up of electronic components and electromagnetic relays. Its input part consists of electronic circuitry which performs rectifications tasks. Its output part consists of an electromagnetic relay. 

Thermal Relay 

 

works on a very simple principle based on heat effect i.e.

the rise in close temperature changes one position of the contact to a different.

Mostly it is used for motor protection purposes. It consists of temperature sensors and control elements.

 Reed Relays

Reed Relays consist of a pair of magnetic strips (also called as reed) that is sealed within a glass tube.

This reed acts as each AN armature and a contact blade.

The magnetic flux applied to the coil is wrapped around this tube that produces these reeds move so change operation is performed.


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