Phase-to-neutral voltage Uo calculation
Phase-to-neutral voltage Uo calculation
(OP)
Hi,
Could anyone please let me know how to calculate the phase-to-neutral voltage for a single phase circuit and a two phase circuit? Is it the same as for a 3-phase one, i.e. Uo=U/sqrt(3)?
Many thanks,
Could anyone please let me know how to calculate the phase-to-neutral voltage for a single phase circuit and a two phase circuit? Is it the same as for a 3-phase one, i.e. Uo=U/sqrt(3)?
Many thanks,






RE: Phase-to-neutral voltage Uo calculation
It depends on the configuration of the source.
If your single-phase circuit is made of two phases of a three-phase wye system, your calculation is correct.
If your single-phase circuit originates from two ends of a single-phase transformer with a center tap, the phase-to-neutral voltage will be half the phase voltage.
It would help to get a definite answer if you could post a diagram or describe your source in detail.
Good on ya,
Goober Dave
RE: Phase-to-neutral voltage Uo calculation
My question refers to the phase-to-neutral voltage for a 2 phase 500V power cable. I was also wondering what this would be for a single phase cable of 500V.
Hope this is more helpful.
Many thanks,
RE: Phase-to-neutral voltage Uo calculation
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RE: Phase-to-neutral voltage Uo calculation
It is a two phase supply cable, not one from a three-phase group.
RE: Phase-to-neutral voltage Uo calculation
RE: Phase-to-neutral voltage Uo calculation
Thanks in advance
RE: Phase-to-neutral voltage Uo calculation
I agree with David - there's not much 2-phase stuff left. I think there was some in the outlying parts of north-east England but even that might have gone by now.
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If we learn from our mistakes I'm getting a great education!
RE: Phase-to-neutral voltage Uo calculation
RE: Phase-to-neutral voltage Uo calculation
The term ground is often used to indicate neutral. Are you using the term neutral to indicate ground?
My best guess is that you have a single phase circuit fed from two phases. You don't have a neutral but the voltage to ground of either line MAY be (Line to line Voltage/Root Three)
or, for 500 Volts, 289 Volts.
Bill
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