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Calculating %Z from %IZ

Calculating %Z from %IZ

Calculating %Z from %IZ

(OP)
I recently ordered a few 208V to 208V isolation transformers.  I asked the manufacturer for the impedance data.  I was given %IZ, %IX, and X/R.  When I calculate the %Z, the results are larger than expected.  I may be doing something wrong.  Can anyone tell me how to calculate the %Z from the provided data?  These are 15kVA to 150kVA transformers.   

RE: Calculating %Z from %IZ

Use the nameplate data to calculate the impedance and reactance in ohms instead of PU.
Then use the X/R ratio and Pythagoras' theorem.  

Bill
--------------------
"Why not the best?"
Jimmy Carter

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