4.20 A transformer is rated at 2,200:220 volts and 60 cycles per second. If the transformer is used in a system with a voltage the same as the rated but the frequency is 50 cps, compute for the Pe2 in terms of Pel and Ph2 in terms of Ph1. Will the core loss be less or greater than at 60 cps? Ans. Pe2 = Pel1; Ph2 = 1.113Phl; greater %3D

4.20 A transformer is rated at 2,200:220 volts and 60 cycles per second. If the transformer is used in a system with a voltage the same as the rated but the frequency is 50 cps, compute for the Pe2 in terms of Pel and Ph2 in terms of Ph1. Will the core loss be less or greater than at 60 cps? Ans. Pe2 = Pel1; Ph2 = 1.113Phl; greater %3D

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 3.27P: A three-phase transformer is rated 1000MVA,220Y/22kV. The Y-equivalent short-circuit impedance,...

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