4. For the three-phase system shown below, draw an impedance diagram expressing all impedances in per unit on a common base of 20 MVA, 2600 V on the HV side of the transformer. Using this impedance diagram, find the HV and LV currents.

4. For the three-phase system shown below, draw an impedance diagram expressing all impedances in per unit on a common base of 20 MVA, 2600 V on the HV side of the transformer. Using this impedance diagram, find the HV and LV currents.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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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. For the three-phase system shown below, draw an impedance diagram expressing all impedances in per
unit on a common base of 20 MVA, 2600 V on the HV side of the transformer. Using this impedance
diagram, find the HV and LV currents.
38 Cable
Volts 737 (0.4+0.6)
Johms
2600
A Con.
LOAD
15 KVA
3000/230 V
Z= 10.06 pu
(50+|120)
olms

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Step 3: Determination of impedance of a cable at 20 MVA , 242.67 V

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