A 45KVA, single-phase transformer is tested on both open-circuit and short-circuit conditions, losses thus measured being 240W and 58OW respectively. Calculate the (a) Efficiency when supplying one half of full load at a power factor of 0.85. (b) Load corresponding to maximum efficiency.

A 45KVA, single-phase transformer is tested on both open-circuit and short-circuit conditions, losses thus measured being 240W and 58OW respectively. Calculate the (a) Efficiency when supplying one half of full load at a power factor of 0.85. (b) Load corresponding to maximum efficiency.

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.14P: A single-phase 50-kVA,2400/240-volt,60-Hz distribution transformer is used as a step-down...

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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

O Auto transformer
O Stepdown transformer
A 45KVA, single-phase transformer is tested on both open-circuit and short-circuit conditions, losses thus
measured being 240W and 580W respectively. Calculate the
(a) Efficiency when supplying one half of full load at a power factor of 0.85.
(b) Load corresponding to maximum efficiency.
Identify the test used to measure the copper losses of the transformer. With necessary diagram explain the
same.
hp
f10
40
&
8.
60

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