4.21 A 10-kVA transformer has an iron loss of 150 W and a full-load copper loss of 250 W. Calculate the transformer efficiency for the following load conditions: a. Full load at 0.8 power factor lagging b. 75% of full load at unity power factor c. 50% of full load at 0.6 power factor lagging

4.21 A 10-kVA transformer has an iron loss of 150 W and a full-load copper loss of 250 W. Calculate the transformer efficiency for the following load conditions: a. Full load at 0.8 power factor lagging b. 75% of full load at unity power factor c. 50% of full load at 0.6 power factor lagging

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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Concept explainers

Three-Phase Transformers

Three-segment transformers are a type of transformer used to transform voltages of electrical systems into three ranges. Two type transformers are shell-type transformer and core type transformer. In brief, it could be described because of the exquisite kinds of configurations.

Transformer

Ever since electricity has been created, people have started using it in its entirety. We see many types of Transformers in the neighborhoods. Some are smaller in size and some are very large. They are used according to their requirements. Many of us have seen the electrical transformer but they do not know what work they are engaged in.

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4.21 A 10-kVA transformer has an iron loss of 150 W and a full-load copper loss of
250 W. Calculate the transformer efficiency for the following load conditions:
a. Full load at 0.8 power factor lagging
b. 75% of full load at unity power factor
c. 50% of full load at 0.6 power factor lagging

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