OK. When combined with (2) windings in series at higher voltage I can see that. Thus, it is a bit ambiguous to simply ask a question about a 3ph transformer supplying a single 1ph load.
3 phase Transformer
- Thread starter Gerald Flingos
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The more details you have going in the front, the more details you'll get coming out the back. :lol:
Not true for a Y (Wye)!!:?
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- Massachusetts
Yes, true for a wye.
A Y has three nodes (A, B, C) and a center point N for neutral. So four(4) points.
A - N is phase A voltage.
A - B is not phase voltage, it is 1.732*phase voltage.
Agree or not????
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I guess I thought that it should be obvious as I didn't think that it was that complicated. From each of L1,L2, and L3 to the X0(N) is single phase from L1-L2, L2-L3,and L1-L3 it is also single phase. I would have thought that would be common knowledge.
Now that this string of posts has gotten this far what the OP's question in the first place, simply supplying a 1ph load from a 3ph transformer and we added what kva would be available for a 1p load of the 3ph transformer's kva rating which is not to be ignored.
So did the OP have sufficient info or not???? If so then why????
The OP asked a simple "yes/no" question: "Can you power a single phase panel from a 3 phase transformer where the 3rd leg of the transformer has no load?"
The answer is a simple "yes".
This is the problem. 'Yes' is a correct answer but now you have provided the OP with a loaded gun. So the OP goes ahead and fries the transformer by overloading that angle phase and then says he/she was told that they could supply a single one phase load fro a 3ph transformer.
After being a sales and applications engineer for over 20 years I have become familiar with those who are fishing for answer by asking questions in a way to get answers that they want to hea and not realizing the real implications. Thus, it is similar to ignoring reading this pesky little foot notes at the bottom of the page which is a *yes but."
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What the heck are you talking about?:huh:
The answer to the OPs question was answered in the first response and backed up by the next responses.
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- Massachusetts
How about just answer the question that is asked, if it bothers you that there is missing info than you can choose not to answer.
The first repose the OP was given was, 'Yes but it reduces the capacity'. That is plenty of info for the OP to ask more questions.
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It is up to the OP, not you as to what can be ignored.
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