What Are Step Relays and How Do They Function?

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Discussion Overview

The discussion centers around the concept of step relays, also referred to as stepper relays or stepper switches. Participants seek to understand their function, applications, and mechanical complexity, with requests for information and visual references.

Discussion Character

  • Exploratory
  • Technical explanation

Main Points Raised

  • One participant inquires about the nature and function of step relays, expressing a need for information and images.
  • Another participant explains that step relays operate by passing current through a coil, which attracts a piece of iron that moves a lever, engaging a gear wheel to rotate in steps.
  • This mechanism can be used for various applications, such as sequentially turning on lights or switching telephone lines, with historical context provided regarding their use in old telephone exchanges.
  • Additional participants mention alternative names for step relays, such as "stepper switch," and provide links to external resources for further information.

Areas of Agreement / Disagreement

Participants generally agree on the basic function and applications of step relays, but there is no consensus on the terminology, as multiple names are presented without resolving which is preferred.

Contextual Notes

The discussion does not delve into the technical specifications or detailed operational principles of step relays, leaving some assumptions about their complexity and applications unaddressed.

Who May Find This Useful

This discussion may be useful for individuals interested in electrical engineering, automation, or historical telecommunications technology.

ahmedahmed
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step relay?

Hi everybody

I heard that there is a step relay device and I didn't see it.

Can anyone help me about it?
I need information and pictures

Thanks

Best regards
Ahmed Hassan
 
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Look up "stepper relay" on Google. plenty of replies there.

These relays are mechanically complicated but the principle is easy.
A current is passed through a coil of wire. This attracts a piece of iron which moves a little lever with a hook on it.
The hook pulls on the teeth of a gear wheel one tooth at a time each time the coil gets current.

This causes the relay to rotate the wheel in steps. This might then cause the wheel to turn electrical contacts on and off.

You could use this to switch to turn lights on in sequence or you could use it to switch telephone lines. Old telephone exchanges used to use these for doing this.

You could use it in a washing machine to turn on the water then the motor and so on.
 


They're also called "stepper switch".

http://www.sscnet.ucla.edu/geog/gessler/topics/step-switch-1-24-b.jpg
 
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Thanks for all
 

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