4.100 kVA, 6800-240 V, 50 Hz single phase step down transformer has the following parameters:RLs-0.008Ω RHs-2.6Ω R-Hs-5000Ω X.s-0.015ΩXHs=5.22 Xm,HS=88002Transformer is delivering 80% of rated load at rated voltage and 0.95 lagging power factor.Determine the following:a) The equivalent impedance of the transformer referred to primary.b) Input impedance of the combined transformer and load.c) Actual input voltage at HV side.

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Answered: 100 kVA, 6800-240 V, 50 Hz single phase…

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100 kVA, 6800-240 V, 50 Hz single phase step down transformer h RLs=0.0082 RHs=2.62 Rfe-HS=50002 XLs=0.0152

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 3.63P: A 23/230-kV step-up transformer feeds a three-phase transmission line, which in turn supplies a...

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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

4.
100 kVA, 6800-240 V, 50 Hz single phase step down transformer has the following parameters:
RLs-0.008Ω RHs-2.6Ω R-Hs-5000Ω X.s-0.015Ω
XHs=5.22 Xm,HS=88002
Transformer is delivering 80% of rated load at rated voltage and 0.95 lagging power factor.
Determine the following:
a) The equivalent impedance of the transformer referred to primary.
b) Input impedance of the combined transformer and load.
c) Actual input voltage at HV side.

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