3. A 3-phase ring distributor ABCDA, fed at A at 11 kV supplies balanced loads of 30 A at 0.8 pf lagging at B, 50 A at 0.707 pf lagging at C, and 40 A at 0.8 pf lagging at D. The load currents are referred to the supply voltage at A. The impedances per phase of the various

3. A 3-phase ring distributor ABCDA, fed at A at 11 kV supplies balanced loads of 30 A at 0.8 pf lagging at B, 50 A at 0.707 pf lagging at C, and 40 A at 0.8 pf lagging at D. The load currents are referred to the supply voltage at A. The impedances per phase of the various

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 AC Circuit

Alternating Current (AC) is a type of electric power in which the electric current changes, both in magnitude and direction, at regular intervals. This AC Circuits can deliver power in either a Single Phase system or a Three Phase system.

Question

answer num 5 but use num 3 as reference

5. In problem # 3, if there will be an interconnector between A and C, what must be its
impedance (magnitude and angle) so that the new station bus-bar voltage at C will be
6212.805/-0.568° V?

3. A 3-phase ring distributor ABCDA, fed at A at 11 kV supplies balanced loads of 30 A at 0.8
pf lagging at B, 50 A at 0.707 pf lagging at C, and 40 A at 0.8 pf lagging at D. The load
currents are referred to the supply voltage at A. The impedances per phase of the various
sections are:
Section AB = (3+j4) ohms Section BC = (1+j1) ohms
Section CD = (2+j3) ohms Section DA = (1+j2) ohms
Calculate the currents in sections: AB and BC, and station bus-bar voltages per phase at
B, and C.

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Analysis of Single Phase and Three Phase System

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