The main insulation of a 110 k measuring transformer shown in the figure will be calculated. For this, the system between the oil boiler and the high voltage winding will be considered as a layered planar electrode system. a) Calculate the stresses and field strengths in the layers at 110 kV. b) Calculate the maximum stress that can be applied to the system without puncturing the insulating layers? c) Since the gap between the boiler and the high voltage winding is a = 45 mm and the porcelain layer thickness al = 15 mm, calculate the thickness of the oil and oil paper layer that will maximize the puncture voltage. In this case, what is the highest voltage that can be applied between the boiler and the high voltage winding? al = 15 mm, a2 = 20 mm, a3 = 10 mm, Ɛr1 = 5, Er2 = 2.2, Er3 = 3.1, Ed1 = 250 kV / cm, Ed2 = 150 kV / cm, Ed3 = 200 kV / cm porcelain, Transformer oil Greaseproof paper Caldron E3 High Voltage Winding a1 az a U

The main insulation of a 110 k measuring transformer shown in the figure will be calculated. For this, the system between the oil boiler and the high voltage winding will be considered as a layered planar electrode system. a) Calculate the stresses and field strengths in the layers at 110 kV. b) Calculate the maximum stress that can be applied to the system without puncturing the insulating layers? c) Since the gap between the boiler and the high voltage winding is a = 45 mm and the porcelain layer thickness al = 15 mm, calculate the thickness of the oil and oil paper layer that will maximize the puncture voltage. In this case, what is the highest voltage that can be applied between the boiler and the high voltage winding? al = 15 mm, a2 = 20 mm, a3 = 10 mm, Ɛr1 = 5, Er2 = 2.2, Er3 = 3.1, Ed1 = 250 kV / cm, Ed2 = 150 kV / cm, Ed3 = 200 kV / cm porcelain, Transformer oil Greaseproof paper Caldron E3 High Voltage Winding a1 az a U

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 Transformer

A single-phase transformer is a type of power transformer. It is an electrical device that accepts converts the single phase alternating power into single phase alternating power. In this power conversion the voltage is stepped up or down. If the voltage is stepped up, the current will be stepped down and if the voltage is stepped down, the current will be stepped up.

Question

100%

The main insulation of a 110 kV measuring transformer shown in the figure will be
calculated. For this, the system between the oil boiler and the high voltage winding
will be considered as a layered planar electrode system.
a) Calculate the stresses and field strengths in the layers at 110 kV.
b) Calculate the maximum stress that can be applied to the system without puncturing
the insulating layers?
c) Since the gap between the boiler and the high voltage winding is a = 45 mm and the
porcelain layer thickness a1 = 15 mm, calculate the thickness of the oil and oil paper
layer that will maximize the puncture voltage. In this case, what is the highest voltage
that can be applied between the boiler and the high voltage winding?
al = 15 mm, a2 = 20 mm, a3 = 10 mm, Ɛr1 = 5, Ɛr2 = 2.2, Ɛr3 = 3.1, Ed1 = 250 kV / cm,
Ed2 = 150 kV / cm, Ed3 = 200 kV / cm
porcelain,
Transformer oil
Greaseproof paper
Caldron
E3
-High Voltage Winding
a1
az
a
U

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