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The following results were obtained on a 50 kVA transformer. Open circuit test – primary voltage, 3300 V; secondary voltage, 400 V; primary power, 430 W. Short-circuit test – primary voltage, 124 V; primary current, 15.3 A; primary power, 525 W; secondary current, full-load value. Calculate: a) the efficiencies at full load and at half load for 0.7 power factor; (b) the voltage regulations for power factor 0.7, (i) lagging, (ii) leading; (c) the secondary terminal voltages corresponding to (i) and (ii)

The following results were obtained on a 50 kVA transformer. Open circuit test – primary voltage, 3300 V; secondary voltage, 400 V; primary power, 430 W. Short-circuit test – primary voltage, 124 V; primary current, 15.3 A; primary power, 525 W; secondary current, full-load value. Calculate: a) the efficiencies at full load and at half load for 0.7 power factor; (b) the voltage regulations for power factor 0.7, (i) lagging, (ii) leading; (c) the secondary terminal voltages corresponding to (i) and (ii)

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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The following results were obtained on a 50 kVA transformer. Open circuit test – primary voltage, 3300 V; secondary voltage, 400 V; primary power, 430 W. Short-circuit test – primary voltage, 124 V; primary current, 15.3 A; primary power, 525 W; secondary current, full-load value. Calculate: a) the efficiencies at full load and at half load for 0.7 power factor; (b) the voltage regulations for power factor 0.7, (i) lagging, (ii) leading; (c) the secondary terminal voltages corresponding to (i) and (ii).
Transcribed Image Text:The following results were obtained on a 50 kVA transformer. Open circuit test – primary voltage, 3300 V; secondary voltage, 400 V; primary power, 430 W. Short-circuit test – primary voltage, 124 V; primary current, 15.3 A; primary power, 525 W; secondary current, full-load value. Calculate: a) the efficiencies at full load and at half load for 0.7 power factor; (b) the voltage regulations for power factor 0.7, (i) lagging, (ii) leading; (c) the secondary terminal voltages corresponding to (i) and (ii).
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