A 25-kVA, 4000/400-V, 60-Hz transformer has the following parameters:  RH =18 Ω, XH = 25 Ω, RL = 180 mΩ, XL = 250 m Ω, RCH =15 kΩ, and XMH = 25 kΩ.  If the open-circuit and short-circuit tests are performed on this transformer, what are the readings of the instruments in each case?

A 25-kVA, 4000/400-V, 60-Hz transformer has the following parameters:  RH =18 Ω, XH = 25 Ω, RL = 180 mΩ, XL = 250 m Ω, RCH =15 kΩ, and XMH = 25 kΩ.  If the open-circuit and short-circuit tests are performed on this transformer, what are the readings of the instruments in each case?

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 25-kVA, 4000/400-V, 60-Hz transformer
has the following parameters:
 RH =18 Ω, XH = 25 Ω, RL = 180 mΩ, XL = 250
m Ω, RCH =15 kΩ, and XMH = 25 kΩ.
 If the open-circuit and short-circuit tests are
performed on this transformer, what are the
readings of the instruments in each case?

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