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4.32 Consider a 75 kVA, 2400/240 V, 60 Hz transformer. Assume that the open-circuit and short- circuit tests were performed on the transformer and that the following data were obtained: Open-Circuit Test (on Primary) Short-Circuit Test (on Primary) Voltmeter Va=2400V V= 200 V I=0.50 A P =75W Ammeter =31.25 A Wattmeter P = 800 W Also assume that the transformer operated at full load with a 0.92 lagging power factor. Note that the given power factor belongs to the load, not to the transformer. Determine the following: (a) The equivalent impedance, resistance, and reactance of the transformer, all referred to its primary side (b) Total loss, including the copper and core losses, at full load (c) The efficiency of the transformer (d) The percent voltage regulation of the transformer

4.32 Consider a 75 kVA, 2400/240 V, 60 Hz transformer. Assume that the open-circuit and short- circuit tests were performed on the transformer and that the following data were obtained: Open-Circuit Test (on Primary) Short-Circuit Test (on Primary) Voltmeter Va=2400V V= 200 V I=0.50 A P =75W Ammeter =31.25 A Wattmeter P = 800 W Also assume that the transformer operated at full load with a 0.92 lagging power factor. Note that the given power factor belongs to the load, not to the transformer. Determine the following: (a) The equivalent impedance, resistance, and reactance of the transformer, all referred to its primary side (b) Total loss, including the copper and core losses, at full load (c) The efficiency of the transformer (d) The percent voltage regulation of the transformer

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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4.32 Consider a 75 kVA, 2400/240 V, 60 Hz transformer. Assume that the open-circuit and short- circuit tests were performed on the transformer and that the following data were obtained: Open-Circuit Test (on Primary) Short-Circuit Test (on Primary) Voltmeter Var=2400V V= 200 V I=0.50 A P =75W Ammeter =31.25 A Wattmeter P = 800 W Also assume that the transformer operated at full load with a 0.92 lagging power factor. Note that the given power factor belongs to the load, not to the transformer. Determine the following: (a) The equivalent impedance, resistance, and reactance of the transformer, all referred to its primary side (b) Total loss, including the copper and core losses, at full load (c) The efficiency of the transformer (d) The percent voltage regulation of the transformer
Transcribed Image Text:4.32 Consider a 75 kVA, 2400/240 V, 60 Hz transformer. Assume that the open-circuit and short- circuit tests were performed on the transformer and that the following data were obtained: Open-Circuit Test (on Primary) Short-Circuit Test (on Primary) Voltmeter Var=2400V V= 200 V I=0.50 A P =75W Ammeter =31.25 A Wattmeter P = 800 W Also assume that the transformer operated at full load with a 0.92 lagging power factor. Note that the given power factor belongs to the load, not to the transformer. Determine the following: (a) The equivalent impedance, resistance, and reactance of the transformer, all referred to its primary side (b) Total loss, including the copper and core losses, at full load (c) The efficiency of the transformer (d) The percent voltage regulation of the transformer
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