A transformer is rated at 890 VA and has a primary voltage of 440 V and a secondary voltage of 180 V. Calculate the efficiency (in %) of the transformer operating at 0.60 rated load when the power factor is 0.75, the rated copper losses are 40 W and the rated iron losses are 12 W. Give your answer in percent. Answer: %

Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter3: Power Transformers
Section: Chapter Questions
Problem 3.9P
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A transformer is rated at 890 VA and has a primary voltage of 440 V and a secondary voltage of 180 V. Calculate the
efficiency (in %) of the transformer operating at 0.60 rated load when the power factor is 0.75, the rated copper
losses are 40 W and the rated iron losses are 12 W. Give your answer in percent.
Answer:
%
Transcribed Image Text:A transformer is rated at 890 VA and has a primary voltage of 440 V and a secondary voltage of 180 V. Calculate the efficiency (in %) of the transformer operating at 0.60 rated load when the power factor is 0.75, the rated copper losses are 40 W and the rated iron losses are 12 W. Give your answer in percent. Answer: %
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