Experimental approach to the estimation of the long term corona performance of non-ceramic insulator housings

Victor M. Moreno, Ravi S. Gorur

Research output: Chapter in Book/Report/Conference proceedingConference contribution

8 Scopus citations

Abstract

This paper presents the results from a study on the synergistic effects of corona, humidity and mechanical stresses on the degradation of non-ceramic insulator (NCI) housing materials. Three different polymer formulations, namely silicone rubber (SiR), ethylene propylene diene monomer (EPDM) and a mixture of both were evaluated in a test cell and the surface changes resulting from degradation were monitored. Under the experimental conditions adopted in this study, varying degrees of polymer degradation were observed for each material group. A strong influence of humidity on the development of degradation processes was identified. By computing cumulative charge magnitudes up to the time when surface cracking was detected, a simplistic correlation with expected field operating conditions seems to indicate that even under severe circumstances (corona continuously impinging at the same site) NCI housing degradation similar to that observed in this study is fairly unlikely to occur for field exposure times amounting to many years.

Original languageEnglish (US)
Title of host publicationConference Record of IEEE International Symposium on Electrical Insulation
PublisherIEEE
Pages193-196
Number of pages4
StatePublished - 2000
EventISEI 2000 - IEEE International Symposium on Electrical Insulation - Anaheim, CA, USA
Duration: Apr 2 2000Apr 5 2000

Other

OtherISEI 2000 - IEEE International Symposium on Electrical Insulation
CityAnaheim, CA, USA
Period4/2/004/5/00

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Building and Construction

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    Moreno, V. M., & Gorur, R. S. (2000). Experimental approach to the estimation of the long term corona performance of non-ceramic insulator housings. In Conference Record of IEEE International Symposium on Electrical Insulation (pp. 193-196). IEEE.