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  4. Relay Construction and its peration...

Relay Construction and its peration


The following figure shows how a Relay looks internally and how it can be constructed,

internal structure of relay

On a casing, a core with copper windings (forms a coil) winded on it is placed. A movable armature consists of a spring support

or stand like structure connected to one end, and a metal contact connected to another side, all these arrangements are placed

over the core such that, when the coil is energized, it attracts the armature. The movable armature is generally considered as a

common terminal which is to be connected to the external circuitry. The relay also has two pins namely normally closed and

normally opened (NC and NO),the normally closed pin is connected to the armature or the common terminal whereas the

normally opened pin is left free (when the coil is not energized). When the coil is energized the armature moves and is get

connected to the normally opened contact till there exists flow of current through the coil. When it is de-energized it goes to its

initial position.

The general circuit representation of the relay is as shown in the figure below

SPDT-Relay-Working

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Silver price chart within 1 month

Silver price chart within 1 month

What is relay?

What is relay?

Product Categories

  • Signal Relay
  • Industrial Relay
  • Automotive Relay
  • Relay Socket
  • Single Phase SSR
    • DC-AC
    • DC-DC
    • AC-AC
    • Voltage Reguator
  • Three Phase SSR
    • DA
    • AA
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  • Silver price chart within 1 month
    Silver price chart within 1 month
    2020-08-06
  • Application of  solid state relay
    Application of solid state relay
    2020-06-07
  • Relay Construction and its peration
    Relay Construction and its peration
    2020-04-01

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