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The primary and secondary windings of a 500-kVA, 11-kV/415-V, single-phase transformer have resistances of 0.42 Q and 0.0019 Q, respectively. Its core losses are 2.9 kW. Assuming the power factor to be 0.8 leading, determine its % efficiency on half load.

The primary and secondary windings of a 500-kVA, 11-kV/415-V, single-phase transformer have resistances of 0.42 Q and 0.0019 Q, respectively. Its core losses are 2.9 kW. Assuming the power factor to be 0.8 leading, determine its % efficiency on half load.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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Electrical Machines Q2.8

2.8 The primary and secondary windings of a 500-kVA, 11-kV/415-V, single-phase transformer have resistances of 0.42 Q and 0.0019 N, respectively. Its core losses are 2.9 kW. Assuming the power factor to be 0.8 leading, determine its % efficiency on half load.
Transcribed Image Text:2.8 The primary and secondary windings of a 500-kVA, 11-kV/415-V, single-phase transformer have resistances of 0.42 Q and 0.0019 N, respectively. Its core losses are 2.9 kW. Assuming the power factor to be 0.8 leading, determine its % efficiency on half load.
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