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.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: AC Theory Question: Transformers

**Physics Forums | Science Articles, Homework Help, Discussion**