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

Introductory Circuit Analysis (13th Edition)

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ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

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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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