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A 3 phase AC (Alternating Current) question

 
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Ceengland



Joined: 11 Oct 2020
Posts: 378
Location: MS

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

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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