A transformer of 100MVA, 60Hz, 138/69 kV, works as step down, has the following parameters: r1 = 0,06 ohm; XL1 = 0,08 ohm; r2 = 0,03 ohm; XL2 = 0,04 ohm. When the transformer is at rated load and assuming that the voltage at the terminals and the induced voltages are in phase, calculate:The relation between the primary and secondary induced electromotive force (emf) and between respective terminal voltages.Explain the results obtained.

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Answered: A transformer of 100MVA, 60Hz, 138/69…

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

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A transformer of 100MVA, 60Hz, 138/69 kV, works as step down, has the following parameters: r1 = 0,06 ohm; XL1 = 0,08 ohm; r2 = 0,03 ohm; XL2 = 0,04 ohm. When the transformer is at rated load and assuming that the voltage at the terminals and the induced voltages are in phase, calculate:
- The relation between the primary and secondary induced electromotive force (emf) and between respective terminal voltages.
- Explain the results obtained.

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