
210 Introduction to Electrical Power and Power Electronics
rms fault current. Ignore the series resistance (but not the reactance) of the trans-
former and the generator. Assume all cables short with negligible R and X, and
follow the following steps:
(1) As is commonly done by power engineers, convert the system to % values
based on the kilovolt-ampere and voltage ratings of the transformer feeding
the fault. Then, determine the fault current in amperes at the fault location
and also at the generator terminals using the voltage ratio.
(2) Repeat the calculation by converting the system to % Z values based on the
kilovolt-ampere and voltage ...