Problem 7: The equivalent circuit impedances of a 20-kVA, 2400/240 V, 60-Hz transformer are to be determined. The tests

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Problem 7 The Equivalent Circuit Impedances Of A 20 Kva 2400 240 V 60 Hz Transformer Are To Be Determined The Tests 1 (27.51 KiB) Viewed 37 times

Problem 7: The equivalent circuit impedances of a 20-kVA, 2400/240 V, 60-Hz transformer are to be determined. The tests were performed on both sides of the transformer and the following data were taken: With high-voltage side open-circuited With low-voltage side short-circuited Voc = 240V Vsc = 61.3 V loc 1.038 A Isc = 8.33 A Voc= 122 W Psc = 257 W a) Determine the equivalent circuit impedances and draw the equivalent circuit. b) Compute the efficiency of the transformer at full load and 0.85 pf lagging. c) Compute the voltage regulation of the transformer at full load and 0.85 pf lagging.