NDLI: Mold growth on nonceramic insulators and its impact on electrical performance

Content Provider	IEEE Xplore Digital Library
Author	Gorur, R.S. Montesinos, J. Roberson, R. Burnham, J. Hill, R.
Copyright Year	1999
Description	Author affiliation: Arizona State Univ., Tempe, AZ, USA (Gorur, R.S.)
Abstract	This paper describes the identification of a common mold (i.e., fungus) growing on nonceramic insulators (NCI) in service, and analyzes its impact on the electrical performance. The insulators evaluated were line posts removed from a 138 kV transmission line serving the interior (away from the coast) regions in Florida. The insulators had housings made from different types of silicone rubber (SR) and ethylene propylene rubber (EPR) polymer families. Electrical tests performed include surface resistance measurements and determination of contamination withstand capability (CWC) using the clean-fog procedure. Changes in the CWC were correlated to material changes by using micro-Fourier transform infra-red (FTIR) analysis and surface resistance measurements. It was concluded that the mold growth is dependent on material formulation and outdoor environment. On SR insulators that exhibited mold growth, there was a reduction in the CWC when compared to the same insulator without the mold; however, even the reduced level of CWC was superior to that obtained on similarly rated EPR and porcelain insulators without any visible mold growth. Lastly, simple methods to remove the mold from the insulators are listed.
Starting Page	818
Ending Page	822
File Size	529195
Page Count	5
File Format	PDF
ISBN	0780355156
DOI	10.1109/TDC.1999.756156
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1999-04-11
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Dielectrics and electrical insulation Rubber Strontium Paramagnetic resonance Surface contamination Surface resistance Electrical resistance measurement Fungi Performance analysis Plastic insulation
Content Type	Text
Resource Type	Article

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