A transformer takes 10 A on no-load at a power factor of 0.1. The turn ratio is 4:1 (step down). If a load is supplied by the secondary at 200 A and p.f. of 0.8, find the primary current and power factor (internal voltage drops in transformer are to be ignored).

A transformer takes 10 A on no-load at a power factor of 0.1. The turn ratio is 4:1 (step down). If a load is supplied by the secondary at 200 A and p.f. of 0.8, find the primary current and power factor (internal voltage drops in transformer are to be ignored).

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

A transformer takes 10 A on
no-load at a power factor of
0.1. The turn ratio is 4:1 (step
down). If a load is supplied
by the secondary at 200
A and p.f. of 0.8, find the
primary current and power
factor (internal voltage drops
in transformer are to be
ignored).

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