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Tranformer Power Calculation

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7JLAman4

Electrical
Nov 28, 2005
48
The formula for an unbalanced Wye transformer output is as follows:
I(L) = SQRT[I(A)^2+I(B)^2+I(C)^2-[I(A)I(B)]-[I(B)I(C)]-[I(C)I(A)])
What is I(L)? In a balanced Wye system, I(L) = I(Ph). This equation given for an unbalanced Wye load is puzzling. At what location would this be measurable?
 
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Just found the answer. I(L) in the equ. above is to be I(N) or the current flowing on the neutral conductor. Went back to the math and derived the equ. The formula was posted incorrently.
 
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