3 A single phase transmission line isdelivering 460 kVA load at 11 kV. Itsresistance is 4.5 Q and inductive reactanceis 6 Q. If the load power factor is0.7 lagging.Determine theCurrent through the lineSending end voltageSending end power factorRegulation of transmission lineEfficiency of transmission line

Answered: A single phase transmission line is…

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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Question

A single phase transmission line is
delivering 460 kVA load at 11 kV. Its
resistance is 4.5 Q and inductive reactance
is 6 Q. If the load power factor is
0.7 lagging.
Determine the
Current through the line
Sending end voltage
Sending end power factor
Regulation of transmission line
Efficiency of transmission line

Expert Solution

Step 1

Fig: Equivalent circuit diagram of given single-phase Tr-line

(a)

current flowing through the transmission line is given by

$I_{r} = \frac{S}{V_{r}} ∠ - \cos^{-} (p f) plugging values I_{r} = \frac{460 \times 10^{3}}{11 \times 10^{3}} ∠ - \cos^{-} (0.7) I_{r} = 41.81 ∠ - 45.57 ° A$

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