The name plate of a single phase transformer reads 50 kVA, 60 Hz, 2400/240 volt. The core loss at rated voltage and frequency is 186 W. If the transformer was designed to operate with maximum efficiency at 60% loading, calculate (a) the actual resistances of the primary and secondary windings. (b) the maximum efficiency of the transformer when rated voltage is across the load.

The name plate of a single phase transformer reads 50 kVA, 60 Hz, 2400/240 volt. The core loss at rated voltage and frequency is 186 W. If the transformer was designed to operate with maximum efficiency at 60% loading, calculate (a) the actual resistances of the primary and secondary windings. (b) the maximum efficiency of the transformer when rated voltage is across the 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 3.11MCQ: For a short-circuit test on a 2-winding transformer, with one winding shorted, can you apply the...

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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

The name plate of a single phase transformer reads 50 kVA, 60 Hz, 2400/240 volt. The core
loss at rated voltage and frequency is 186 W. If the transformer was designed to operate with
maximum efficiency at 60% loading, calculate
(a) the actual resistances of the primary and secondary windings.
(b) the maximum efficiency of the transformer when rated voltage is across the load.

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