Answered: A 20 kVA transformer has its maximum…

A 20 kVA transformer has its maximum efficiency of 0.98 at 15 kVA at unity power factor, The iron loss is 350 W.Calculate the efficiency at full load 0.8 power factor lagging and unity power factor.

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 3.57P: A two-winding single-phase transformer rated 60kVA,240/1200V,60Hz, has an efficiency of 0.96 when...

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Question

A 20 kVA transformer has its maximum efficiency of 0.98 at 15KVA
at unity power factor, The iron loss is 350 W.Calculate the efficiency at full load 0.8
power factor lagging and unity power factor.

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