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Transformer Impedances

Transformer Impedances

Transformer Impedances

(OP)
Can someone tell me if there is a reference that provides typical distribution transformer impedances? I'm looking for %Z and either X/R ratios or %X and %R values.

The X/R table in IEEE Red Book is not adequate.

RE: Transformer Impedances

In the Westinghouse Distribution Systems book, there is a table  of typical impedances of distribution transformers of standardized design.  It has %Z & %R.

In Beeman's book, "Industrial Power Systems Handbook", there is a table of approximate resistance, reactance, and impedance of single phase distribution transformers.  This has %R, %X,& %Z.

Also, I don't have it handy but the ANSI standard on transformers may have some tables in it.  I believe it is ANSI C37.010.

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