1. A 200-kVA, 3-phase, 50-Hz transformer has a voltage ratio (line voltages) of 33/11-kV and is delta/delta connected. The resistances per phase are: high voltage 30 , low voltage 0.88 Q and the iron loss is 2000 W. Calculate the maximum efficiency and the efficiency at 75 kVA loading, both at 0.75 power factor lagging.

1. A 200-kVA, 3-phase, 50-Hz transformer has a voltage ratio (line voltages) of 33/11-kV and is delta/delta connected. The resistances per phase are: high voltage 30 , low voltage 0.88 Q and the iron loss is 2000 W. Calculate the maximum efficiency and the efficiency at 75 kVA loading, both at 0.75 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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1.
hai places.
A 200-kVA, 3-phase, 50-Hz transformer has a voltage ratio (line
voltages) of 33/11-kV and is delta/delta connected. The resistances
per phase are: high voltage 30 , low voltage 0.88 Q and the iron
loss is 2000 W. Calculate the maximum efficiency and the efficiency
at 75 kVA loading, both at 0.75 power factor lagging.

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