Investigation of electrical failures in porcelain cap and pin line insulators

A. P. Mishra; R. S. Gorur

doi:10.1109/CEIDP.2007.4451575

Investigation of electrical failures in porcelain cap and pin line insulators

A. P. Mishra, R. S. Gorur

Electrical, Computer, and Energy Engineering, School of (IAFSE-ECEE)

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

2 Scopus citations

Abstract

Suspension and dead-end porcelain insulator strings were removed after 25-30 years in service for various reasons, and the insulator bells (units) were evaluated in the laboratory. Some units failed the puncture test and these were cut open and analyzed. The electric field due to the presence of microscopic defects in porcelain was modeled using a 3 D software package. It has been shown that the local electric field enhancement can be high enough to cause dielectric breakdown of porcelain. The electrical deterioration is a slow process. The breakdown process creates phase changes in the porcelain microstructure and this was confirmed by scanning electron microscopy.

Original language	English (US)
Title of host publication	Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
Pages	95-98
Number of pages	4
DOIs	https://doi.org/10.1109/CEIDP.2007.4451575
State	Published - 2007
Event	2007 Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP - Vancouver, BC, Canada Duration: Oct 14 2007 → Oct 19 2007

Other

Other	2007 Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
Country/Territory	Canada
City	Vancouver, BC
Period	10/14/07 → 10/19/07

ASJC Scopus subject areas

General Engineering
Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

Access to Document

10.1109/CEIDP.2007.4451575

Cite this

Mishra, AP & Gorur, RS 2007, Investigation of electrical failures in porcelain cap and pin line insulators. in Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP., 4451575, pp. 95-98, 2007 Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP, Vancouver, BC, Canada, 10/14/07. https://doi.org/10.1109/CEIDP.2007.4451575

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AB - Suspension and dead-end porcelain insulator strings were removed after 25-30 years in service for various reasons, and the insulator bells (units) were evaluated in the laboratory. Some units failed the puncture test and these were cut open and analyzed. The electric field due to the presence of microscopic defects in porcelain was modeled using a 3 D software package. It has been shown that the local electric field enhancement can be high enough to cause dielectric breakdown of porcelain. The electrical deterioration is a slow process. The breakdown process creates phase changes in the porcelain microstructure and this was confirmed by scanning electron microscopy.

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Investigation of electrical failures in porcelain cap and pin line insulators

Abstract

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ASJC Scopus subject areas

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