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A 3 phase AC (Alternating Current) question

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Ceengland

Joined: 11 Oct 2020
Posts: 391
Location: MS

Posted: Sun Feb 14, 2021 4:09 pm Post subject: A 3 phase AC (Alternating Current) question

On 2/14/2021 4:08 PM, donjohnston wrote:

 	  Quote: 	
		   



 Would I use one leg of the 230v supply to power the coil?



 (I haven't used a relay like this before)

Yes. You do need a neutral, but anything wired to modern 'code' will 
	


have 3 phases, neutral and ground anyway.

The switch is between one leg & the relay coil; the other coil terminal 

goes to neutral. Switch on would  feed one output; switch off would feed 

the other. You'd still need some method of shutting down the whole 

system, of course.



Do check on whether you have 'delta' or 'Y' configuration. With 'Y', you 

can pick any leg for the coil; with 'delta', you need to pick one of the 

120 V legs; the 3rd leg will measure ~180 V to neutral.



Charlie



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Charlie

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