Three zones of a single-phase circuit are identified shown in Figure below. The zones are connected by transformers T1 and T2, whose ratings are also shown. Using base values of 33 kVA and 232 volts in zone 1, Find: 1- Draw the per-unit circuit including the per-unit impedances and the per-unit source voltage. 2- Calculate the load current both in per-unit and in amperes (actual or original value). Zone 1 V₂ = 232.940° Vs "HG T₁ 30 KVA 240/480 volts Хост = 0.10 p.u. Zone 2 Xine = 4 Zload T₂ 20 kVA 460/115 volts Xeg = 0.10 p.u. = Zone 3 +1₁ 1+j2.2 Ω

Three zones of a single-phase circuit are identified shown in Figure below. The zones are connected by transformers T1 and T2, whose ratings are also shown. Using base values of 33 kVA and 232 volts in zone 1, Find: 1- Draw the per-unit circuit including the per-unit impedances and the per-unit source voltage. 2- Calculate the load current both in per-unit and in amperes (actual or original value). Zone 1 V₂ = 232.940° Vs "HG T₁ 30 KVA 240/480 volts Хост = 0.10 p.u. Zone 2 Xine = 4 Zload T₂ 20 kVA 460/115 volts Xeg = 0.10 p.u. = Zone 3 +1₁ 1+j2.2 Ω

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

Three zones of a single-phase circuit are identified shown in Figure below. The zones are connected by
transformers T1 and T2, whose ratings are also shown. Using base values of 33 kVA and 232 volts in zone 1,
Find:
1- Draw the per-unit circuit including the per-unit impedances and the per-unit source voltage.
2- Calculate the load current both in per-unit and in amperes (actual or original value).
Vs
Zone 1
232.940° Vs
G.
38
T₁
30 KVA
240/480 volts
Xeq = 0.10 p.u.
Zone 2
Xiine
=
4 Ω
T₂
20 KVA
460/115 volts
Zload =
Xea
= 0.10 p.u.
Zone 3
u
1+j2.2 Ω
2

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