Understanding Variations in the Tracking and Erosion Performance of HTV-SR-Based Composites due to AC-Stressed Aging

Among the polymeric family, high-temperature-vulcanized silicone rubber (HTV-SR) is the most deployed material for high voltage insulation applications. However, in an outdoor environment, due to contamination and wetting-induced dry band arcing, consequently SR experiences surface tracking and eros...

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Autores principales:	Rahmat Ullah, Muhammad Akbar, Nasim Ullah, Sattam Al Otaibi, Ahmed Althobaiti
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	HTV-SR silica ATH tracking erosion multi-stress Organic chemistry QD241-441
Acceso en línea:	https://doaj.org/article/8ac9e98f16a9483c8ebf94cbd9165a55
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spelling	oai:doaj.org-article:8ac9e98f16a9483c8ebf94cbd9165a552021-11-11T18:42:06ZUnderstanding Variations in the Tracking and Erosion Performance of HTV-SR-Based Composites due to AC-Stressed Aging10.3390/polym132136342073-4360https://doaj.org/article/8ac9e98f16a9483c8ebf94cbd9165a552021-10-01T00:00:00Zhttps://www.mdpi.com/2073-4360/13/21/3634https://doaj.org/toc/2073-4360Among the polymeric family, high-temperature-vulcanized silicone rubber (HTV-SR) is the most deployed material for high voltage insulation applications. However, in an outdoor environment, due to contamination and wetting-induced dry band arcing, consequently SR experiences surface tracking and erosion. From a practical standpoint, the tracking and erosion performance under multi-stress aging is required to be known. It is in that context that the present study was undertaken to measure and analyze the effect of multi-stress aging on tracking and erosion performance. Composite samples of SR having different filler concentrations of silica and alumina trihydroxide (ATH) were aged in a multi-stress chamber for a period of 5000 h, and after that their electrical tracking performance was studied. Simultaneously, unaged samples were also exposed to tracking test for comparison. To conduct this test, the inclined plane testing technique was used in accordance with IEC-60587. All samples exposed to tracking test were analyzed using different diagnostic and measuring techniques involving surface leakage current measurement, Fourier transform infrared spectroscopy (FTIR), thermal stability and hydrophobicity classification. Experimental results shown that the tracking lifetime increased through incorporation of silica and ATH fillers in the SR. Amongst all test samples, two samples designated as filled with 2% nano silica and 20% micro silica/ATH exhibited greater resistance to tracking. This was attributed to the optimum loading as well as better dispersion of the fillers in the polymer matrix. The presence of nano-silica enhanced time-to-tracking failure, owing to both improved thermal stability and enhanced shielding effect on the surface of nanocomposite insulators.Rahmat UllahMuhammad AkbarNasim UllahSattam Al OtaibiAhmed AlthobaitiMDPI AGarticleHTV-SRsilicaATHtrackingerosionmulti-stressOrganic chemistryQD241-441ENPolymers, Vol 13, Iss 3634, p 3634 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	HTV-SR silica ATH tracking erosion multi-stress Organic chemistry QD241-441
spellingShingle	HTV-SR silica ATH tracking erosion multi-stress Organic chemistry QD241-441 Rahmat Ullah Muhammad Akbar Nasim Ullah Sattam Al Otaibi Ahmed Althobaiti Understanding Variations in the Tracking and Erosion Performance of HTV-SR-Based Composites due to AC-Stressed Aging
description	Among the polymeric family, high-temperature-vulcanized silicone rubber (HTV-SR) is the most deployed material for high voltage insulation applications. However, in an outdoor environment, due to contamination and wetting-induced dry band arcing, consequently SR experiences surface tracking and erosion. From a practical standpoint, the tracking and erosion performance under multi-stress aging is required to be known. It is in that context that the present study was undertaken to measure and analyze the effect of multi-stress aging on tracking and erosion performance. Composite samples of SR having different filler concentrations of silica and alumina trihydroxide (ATH) were aged in a multi-stress chamber for a period of 5000 h, and after that their electrical tracking performance was studied. Simultaneously, unaged samples were also exposed to tracking test for comparison. To conduct this test, the inclined plane testing technique was used in accordance with IEC-60587. All samples exposed to tracking test were analyzed using different diagnostic and measuring techniques involving surface leakage current measurement, Fourier transform infrared spectroscopy (FTIR), thermal stability and hydrophobicity classification. Experimental results shown that the tracking lifetime increased through incorporation of silica and ATH fillers in the SR. Amongst all test samples, two samples designated as filled with 2% nano silica and 20% micro silica/ATH exhibited greater resistance to tracking. This was attributed to the optimum loading as well as better dispersion of the fillers in the polymer matrix. The presence of nano-silica enhanced time-to-tracking failure, owing to both improved thermal stability and enhanced shielding effect on the surface of nanocomposite insulators.
format	article
author	Rahmat Ullah Muhammad Akbar Nasim Ullah Sattam Al Otaibi Ahmed Althobaiti
author_facet	Rahmat Ullah Muhammad Akbar Nasim Ullah Sattam Al Otaibi Ahmed Althobaiti
author_sort	Rahmat Ullah
title	Understanding Variations in the Tracking and Erosion Performance of HTV-SR-Based Composites due to AC-Stressed Aging
title_short	Understanding Variations in the Tracking and Erosion Performance of HTV-SR-Based Composites due to AC-Stressed Aging
title_full	Understanding Variations in the Tracking and Erosion Performance of HTV-SR-Based Composites due to AC-Stressed Aging
title_fullStr	Understanding Variations in the Tracking and Erosion Performance of HTV-SR-Based Composites due to AC-Stressed Aging
title_full_unstemmed	Understanding Variations in the Tracking and Erosion Performance of HTV-SR-Based Composites due to AC-Stressed Aging
title_sort	understanding variations in the tracking and erosion performance of htv-sr-based composites due to ac-stressed aging
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/8ac9e98f16a9483c8ebf94cbd9165a55
work_keys_str_mv	AT rahmatullah understandingvariationsinthetrackinganderosionperformanceofhtvsrbasedcompositesduetoacstressedaging AT muhammadakbar understandingvariationsinthetrackinganderosionperformanceofhtvsrbasedcompositesduetoacstressedaging AT nasimullah understandingvariationsinthetrackinganderosionperformanceofhtvsrbasedcompositesduetoacstressedaging AT sattamalotaibi understandingvariationsinthetrackinganderosionperformanceofhtvsrbasedcompositesduetoacstressedaging AT ahmedalthobaiti understandingvariationsinthetrackinganderosionperformanceofhtvsrbasedcompositesduetoacstressedaging
_version_	1718431773667360768

Understanding Variations in the Tracking and Erosion Performance of HTV-SR-Based Composites due to AC-Stressed Aging

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