In a 20KVA, 2000 / 200 V power transformer, the iron and full load copper losses are 360W and 425W respectively. Calculate the efficiency at (i) full load, 0.9 pf, (ii) half load, 0.55 pf, (iii) Quarter load, 0.3 pf Efficiency at Full load = Efficiency at Half load = Efficiency at Quarter load =

In a 20KVA, 2000 / 200 V power transformer, the iron and full load copper losses are 360W and 425W respectively. Calculate the efficiency at (i) full load, 0.9 pf, (ii) half load, 0.55 pf, (iii) Quarter load, 0.3 pf Efficiency at Full load = Efficiency at Half load = Efficiency at Quarter load =

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 3.32MCQ

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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

Efficiency at Full load =

Efficiency at Half load =

Efficiency at Quarter load =

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