Round robin testing of RTV silicone rubber coatings for outdoor insulation

R. S. Gorur, E. Cherney, C. De Tourreil, D. Dumora, R. Hackam, R. Harmon, H. Hervig, B. Kingsbury, J. Kise, T. Orbeck, M. Spalding, K. Tanaka, R. Tay, G. Toskey, D. Wiitanen

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


This paper presents the results of round robin tests performed to evaluate the electrical performance of Room Temperature Vulcanizing (RTV) silicone rubber coatings used for improving the contamination performance of outdoor ceramic insulators. The tests, performed in six different laboratories, included several salt-fog chambers and a tracking wheel. Most test facilities were equipped with an on-line data acquisition system for measurement of leakage current activity. Four generic formulations of RTV silicone rubber coatings applied on ceramic rods were evaluated. The results indicate a general consensus in the ranking of the coatings' leakage current suppression capability, despite the variation in the experimental conditions employed. This suggests that guidelines for a laboratory test for evaluating the RTV coating material's electrical performance under contaminated conditions could be developed.

Original languageEnglish (US)
Pages (from-to)1881-1887
Number of pages7
JournalIEEE Transactions on Power Delivery
Issue number4
StatePublished - 1996


  • Accelerated aging
  • Erosion
  • Leakage current
  • RTV coatings
  • Water repellency

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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