Answered: A 500KVA three phase transformer has…

A 500KVA three phase transformer has iron losses of 300W and full load copper losses of 600W. Calculate the percentage load at which the transformer is expected to have maximum efficiency.

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter4: Symbols

Section: Chapter Questions

Problem 7SQ: The symbol shown is a(n) a. iron core transformer. b. auto transformer. c. current transformer. d....

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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

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A 500KVA three phase transformer has iron losses of 300W and full load copper losses of 600W. Calculate the percentage load at which the transformer is expected to have maximum efficiency.

Expert Solution

Step 1

For the maximum efficiency the copper loss and the iron loss of the three phase transformer is expressed as:

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