Effect of Coldfog on the Corona Induced Degradation of Silicone Rubber Samples

Reddy, Subba B and Prasad, Shakthi D (2015) Effect of Coldfog on the Corona Induced Degradation of Silicone Rubber Samples. In: IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION, 22 (3). pp. 1711-1718.

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Abstract

Corona is an unavoidable phenomena in high voltage power transmission system, in spite of suitably designed insulator accessories and transmission line hardware. It is a proven fact that the continuous occurrence of corona can subject the polymeric insulator to a severe degradation. Further, moisture in the air has a positive influence on the corona activity. This paper presents the methodology to evaluate the corona performance of the silicone rubber housing material with simultaneous application of cold fog. Analysis conducted after corona treatment by the Fourier Transform Infrared Spectroscopy (FTIR) present an interesting results showing a higher hydroxylation of sample surface under the moisture application than in the normal condition for both AC and DC excitation. FTIR spectrum also indicates the presence of nitric acid on the treated surface with coldfog application. Results obtained from SEM analysis are also presented.

Item Type:	Journal Article
Publication:	IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
Publisher:	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Additional Information:	Copy right for this article belongs to the IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
Keywords:	Corona; Fourier transform infrared spectroscopy; moisture; silicone rubber; leakage current
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	31 Jul 2015 13:20
Last Modified:	31 Jul 2015 13:20
URI:	http://eprints.iisc.ac.in/id/eprint/51957

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