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 15kV and that across the next unit is 12kV. Estimate: ratio of mutual to self-capacitance ii. the bus-bar voltage of the substation. Efficiency across the string of insulators i. ii.

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 15kV and that across the next unit is 12kV. Estimate: ratio of mutual to self-capacitance ii. the bus-bar voltage of the substation. Efficiency across the string of insulators i. ii.

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.33MCQ: The direct electrical connection of the windings allows transient over voltages to pass through the...

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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 15kV and that across the
next unit is 12kV. Estimate:
ratio of mutual to self-capacitance
i.
the bus-bar voltage of the substation.
Efficiency across the string of insulators
ii.
iii.

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