A 500 kVA transformer has an efficiency of 95% at full-load and the same efficiency also at 60% of full-load; both loads at upf (unity power factor) . (a) Compute the iron and copper losses of the transformer. (b) Determine the efficiency of the transformer at 3/4th of full-load.

A 500 kVA transformer has an efficiency of 95% at full-load and the same efficiency also at 60% of full-load; both loads at upf (unity power factor) . (a) Compute the iron and copper losses of the transformer. (b) Determine the efficiency of the transformer at 3/4th of full-load.

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

Single Phase Transformer

A single-phase transformer is a type of power transformer. It is an electrical device that accepts converts the single phase alternating power into single phase alternating power. In this power conversion the voltage is stepped up or down. If the voltage is stepped up, the current will be stepped down and if the voltage is stepped down, the current will be stepped up.

Question

A 500 KVA transformer
has an efficiency of 95% at full-load,
and the same efficiency also at 60% of full-load;
both loads at upf (unity power factor).
(a) Compute the iron and copper losses of the transformer.
(b) Determine the efficiency of the transformer
at 3/4th of full-load.

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