High Voltage TechniqueU=400 kV was applied to the oil-insulated (Ɛroil=2.5) coaxial cylindrical electrode system with inner radius r1=10 cm and outer radius R=20 cm.a) Calculate the maximum field strength.b) In order to reduce the maximum field strength in the oil layer, if the inner electrode surface is coated with a solid insulating material with a thickness of 1 cm and relative dielectric constant Ɛr=4, what will be the maximum field strength in the remaining oil layer?c) Calculate the required solid insulating material thickness in order to reduce the maximum area strength in the oil layer to 88% of the value calculated in a.Note: Option b of this problem, which was solved before, was wrong. If I ask, could you make the right solution with the options b and c.

a. Maximum electric field (Emax)Emax=Vr ln Rr V/mGiven V−400 Kvr=10 cmR=20 cmEmax=4000.1ln 0.20.1…

Answered: High Voltage Technique U=400 kV was…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

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High Voltage Technique

U=400 kV was applied to the oil-insulated (Ɛ_roil=2.5) coaxial cylindrical electrode system with inner radius r₁=10 cm and outer radius R=20 cm.

a) Calculate the maximum field strength.
b) In order to reduce the maximum field strength in the oil layer, if the inner electrode surface is coated with a solid insulating material with a thickness of 1 cm and relative dielectric constant Ɛ_r=4, what will be the maximum field strength in the remaining oil layer?
c) Calculate the required solid insulating material thickness in order to reduce the maximum area strength in the oil layer to 88% of the value calculated in a.

Note: Option b of this problem, which was solved before, was wrong. If I ask, could you make the right solution with the options b and c.

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