A 15kVA, 2400/240, 60 Hz transformer has a primary winding resistance of 4 ohms and a secondary winding resistance of 0.04 ohms. The core losses are 60 W. Find: a) The copper losses at full load and b) The efficiency of the transformer when fully loaded with a PF of 0.9

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 3.11P: For the transformer in Problem 3.10. The open-circuit test with 11.5 kV applied results in a power...
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A 15kVA, 2400/240, 60 Hz transformer has a primary winding resistance of 4 ohms and a secondary winding resistance of 0.04 ohms. The core losses are 60 W.
Find: a) The copper losses at full load and b) The efficiency of the transformer when fully loaded with a PF of 0.9

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