When conducting no-load test on a givensingle-phase transformer, the following testdata were obtained :Primary voltage : 210 V; Secondary voltage :115 V;Primary current : 0.7 A ; Power input : 40 W.Find (i) The turns ratio (ii) the magnetizingcurrent of no-load current (iii) Coreloss current (iv) the iron loss.

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Engineering

Electrical Engineering

When conducting no-load test on a given single-phase transformer, the following test data were obtained :

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 3.28MCQ

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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

When conducting no-load test on a given
single-phase transformer, the following test
data were obtained :
Primary voltage : 210 V; Secondary voltage :
115 V;
Primary current : 0.7 A ; Power input : 40 W.
Find (i) The turns ratio (ii) the magnetizing
current of no-load current (iii) Core
loss current (iv) the iron loss.

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