O.C and S.C tests on a 5 kVA, 220/400 V, 50 Hz, 1- f transformer gave the following results; O.C test : 220 V, 2 A, 100 W (I.v. side) S.C test : 40 V, 11,4 A,200 W (h.v.side) Find the efficiency and approximate regulation of the transformer at full load 0.8 p.f. lagging.

O.C and S.C tests on a 5 kVA, 220/400 V, 50 Hz, 1- f transformer gave the following results; O.C test : 220 V, 2 A, 100 W (I.v. side) S.C test : 40 V, 11,4 A,200 W (h.v.side) Find the efficiency and approximate regulation of the transformer at full load 0.8 p.f. lagging.

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

O.C and S.C tests on a 5 kVA, 220/400 V, 50 Hz, 1- f transformer gave the
following results;
O.C test : 220 V, 2 A, 100 W (I.v. side)
S.C test : 40 V, 11,4 A,200 W (h.v.side)
Find the efficiency and approximate regulation of the transformer at full load 0.8
p.f. lagging.

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