Question: A short circuit test is performed on the low voltage side of a 40-kVA 4800/240V 60HZ transformer and the following data are obtained: W = 240W, V= 66V, and I = rated current. Determine the percent voltage regulation with a 0.88 lagging PowerFactor load connected.(adsbygoogle = window.adsbygoogle || []).push({});

On the Short cct test I found

Impendence (Ze) to be = 7.92<64 ohms

Basically now we've got a simple series circuit with

Source = 4800V

Ze = 7.92<64 ohms

ZL = x< -28.4 ohms

I'm totally stuck on how to find either the current (I) or the magnitude of ZL (x). If I could find either of these I could solve the voltage drop acrossed ZL and find the VR.

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# AC Theory Question: Transformers

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