The US standards are 208 ph to ph and 120 ph to N for industrial.
Residential is 240 ph to ph and 120 ph to ct neutral on a delta
connected transformer secondary. 165 does not appear anywhere in the
mix. That is a very strange primary voltage.
David Kirkby wrote:
kenw2dtc wrote:
David,
I would put this response on contesting.com but I would be eaten alive
by the guru's. I'm taking a stab in the dark as a rank novice on the
subject of power:
If the x-ray facility were to have been fed by WYE transformers
instead of DELTA transformers, wouldn't the "normal 120 VAC" leg be in
the neighborhood of 165?
73,
Ken W2DTC
This is in the UK though, where the mains is 240 / 415 (now 230/400).
It's possible the kit was designed for an American market though, and
fed from a 240->120 converter of some sort. I should ask - I know the
people that run the lab, although they might not know much about the
inner workings of commercial equipment.
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