single vs. 3 phase

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rattus

Senior Member
Yes and No:

Yes and No:

engy said:
Looks like we lost the OP after the first day.
Is there any way we can force grantcool to read the entire thread?:mad: :D
I wonder if we answered his question?:-?

Yes, we did answer his question plus several more, and some of the answers were correct; to wit:

Officially, the open wye is a single-phase service because the IEEE says so, and no polyphase loads are driven. Still some may call it by other names.

Now, there are those who are reluctant to accept the neutral as the common reference when describing the voltages, V1 and V2, on L1 and L2 of a 3-wire, 1-phase service. I contend that the subscripts denote the lines where the voltages are measured, then that leaves only the neutral, N, as a reference. In that case, we add a second subscript, to wit: V1n and V2n?not the other way around.

This argument in no way conflicts with the concept of ?series-aiding? voltages; neither does it affect the drawing of the phasor diagram, nor does it affect the method of analysis. It is simply the convention used to define V1 and V2?just like we define Va, Vb, and Vc in a wye.
 
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