Flashover characteristics of polluted silicone rubber insulators exposed to artificial UV irradiation

Noureddine Harid, A. Nekeb, H. Griffiths, A. Haddad

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

6 Scopus citations

Abstract

This paper presents the results of an experimental investigation on the flashover performance of Silicone Rubber outdoor insulators. The AC flashover voltage of selected samples under dry-clean, clean fog, rain and highly-polluted conditions is measured using ramp-test procedure applied to each insulator mounted in vertical, horizontal and inclined orientations. Conventional design with plain surface and new textured design having uniform hemispherical protuberances have been used and their flashover voltages compared. The effect of UV irradiation on the flashover voltage under controlled temperature and humidity is explored. The results show that under low fog-rate, the flashover voltages of both types of insulators were similar, but had a U-shaped characteristic. For high fog-rate, no significant difference was found between the insulator types, with the flashover voltage increasing with ramp voltage up to a stable value. After UV conditioning, and for polluted insulators under low fog rate and wet tests, vertically-oriented insulators showed a U-shaped characteristic and significant reduction in flashover voltage compared to non-irradiated insulators.

Original languageBritish English
Title of host publicationEIC 2014 - Proceedings of the 32nd Electrical Insulation Conference
PublisherIEEE Computer Society
Pages440-444
Number of pages5
ISBN (Print)9781479927876
DOIs
StatePublished - 2014
Event32nd Electrical Insulation Conference, EIC 2014 - Philadelphia, PA, United States
Duration: 8 Jun 201411 Jun 2014

Publication series

NameEIC 2014 - Proceedings of the 32nd Electrical Insulation Conference

Conference

Conference32nd Electrical Insulation Conference, EIC 2014
Country/TerritoryUnited States
CityPhiladelphia, PA
Period8/06/1411/06/14

Keywords

  • flashover
  • fog test
  • leakage current
  • pollution
  • polymeric insulator
  • rain test
  • UV irradiation

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