In an outdoor substation the three bus-bar conductors are supported by units of post type insulators. Each unit consists of a stack of 3 pin type insulators fixed one on the top of the other. The voltage across the lowest insulator is 13kV and that across the next unit is 12kV. Estimate: i. the bus-bar voltage of the substation. Efficiency across the string of insulators ratio of mutual to self-capacitance ii. iii.

In an outdoor substation the three bus-bar conductors are supported by units of post type insulators. Each unit consists of a stack of 3 pin type insulators fixed one on the top of the other. The voltage across the lowest insulator is 13kV and that across the next unit is 12kV. Estimate: i. the bus-bar voltage of the substation. Efficiency across the string of insulators ratio of mutual to self-capacitance ii. iii.

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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Question

In an outdoor substation the three bus-bar conductors are supported by units of
post type insulators. Each unit consists of a stack of 3 pin type insulators fixed
one on the top of the other. The voltage across the lowest insulator is 13kV and
that across the next unit is 12KV. Estimate:
17.
i.
ratio of mutual to self-capacitance
ii.
the bus-bar voltage of the substation.
iii.
Efficiency across the string of insulators

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