H.W.1- The following figures were obtained from tests on a 30-kVA, 3000/110-V transformer:O.C. test: 3000 V0.5 A 350 W;(a) full-load, 0.8 p.f.S.C. test; 150 V 10 ACalculate the efficiency of the transformer at(b) half-load, unity p.f.500 WAlso, calculate the kVA output at which the efficiency is maximum. (Ans. [96.56%; 97%; 25.1 kVA])2- The efficiency of a 400 kVA, 1-phase transformer is 98.77% when delivering full load at 0.8 powerfactor, and 99.13% at half load and unity power factor. Calculate (a) the iron loss, (b) the full loadcopper loss.(Ans. [(a) 1012 W (b) 2973 W])

Answered: H.W. 1- The following figures were…

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 3.28MCQ

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