A 44KV, 50 Hz overhead transmission line connects Ibra and Muscat. There are three units in a string of insulators. If the capacitance between each insulator pin and earth is 20% of self-capacitance of each insulator, Calculate: i. Distribution of voltage over 3 insulators ii. String efficiency

A 44KV, 50 Hz overhead transmission line connects Ibra and Muscat. There are three units in a string of insulators. If the capacitance between each insulator pin and earth is 20% of self-capacitance of each insulator, Calculate: i. Distribution of voltage over 3 insulators ii. String efficiency

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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Concept explainers

Transmission Line Parameters

The performance of a power system is mostly determined by the producing stations and transmission lines in the system which can be studied with the help of transmission line parameters.

Question

55))

A 44KV, 50 Hz overhead
transmission line connects Ibra
and Muscat. There are three
units in a string of insulators. If
the capacitance between each
insulator pin and earth is
20% of self-capacitance of each
insulator, Calculate:
i. Distribution of voltage over 3
insulators
ii. String efficiency
iii. Draw a suitable figure for this
problem and mark the self-
capacitance,
capacitance between pin and
earth, voltages and currents.
iv. Calculate the new string
efficiency if the third insulator
which is near the
conductor is removed.

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