2.7 The percent impedance of a transformer is typically determined by a short circuit test. In such a test, the secondary of the transformer is shorted and the voltage on the primary is increased until rated current flows in the transformer windings. The applied voltage that produces rated current divided by the rated voltage of the transformer is equal to the per-unit impedance of the transformer. A short circuit test on a 150 KVA, 7200-240 V transformer provides the following results: Primary voltage at 20.8 primary amperes = 208.8 V a. Determine the %Z of the transformer. b. Calculate the ohmic impedance of the transformer in primary and secondary terms. 2006 by Taylor & Francis Group, LLC. c. How much current would flow in the transformer if its secondary would become shorted during normal operating conditions? (Consider source impedance to be zero.)