| DOI | Resolve DOI: https://doi.org/10.1109/TDEI.2019.008203 |
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| Author | Search for: Koné, Daouda1; Search for: Ghunem, Refat Atef1; Search for: Cisse, Ladji; Search for: Hadjadj, Yazid1; Search for: El-Hag, Ayman H. |
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| Affiliation | - National Research Council of Canada. Metrology Research Centre
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| Format | Text, Article |
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| Subject | tracking; erosion; silicone rubber; outdoor insulation; natural silica; inorganic fillers; residue; silica residue |
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| Abstract | This paper investigates the residue formed on silicone rubber filled with natural silica in the inclined plane tracking and erosion test under AC and DC voltages. Simultaneous thermogravimetric and differential thermal analyses reveal residue formation dependent on volatilization and crosslinking in silicone rubber. Thermo-oxidation of volatiles yields silica-based residue protecting the surface during dry-band arcing; whereas, crosslinking leaves carbonaceous residue leading to more severe dry-band arcing. Volume fraction of natural silica replacing silicone rubber is shown to be a main source of silica residue suppressing carbonaceous residue, thus preventing failure in the inclined plane test. More severe erosion under the equivalent +DC voltages as compared to standard AC and equivalent - DC voltages of the inclined plane test is attributed to more severe dry-band arcing heat promoted by carbonaceous residue. Silicone rubber filled with lower particle sizes of natural silica is demonstrated to deteriorate erosion performance, possibly as result of filler-polymer interactions or lower particle size reducing the integrity of the protective silica residue. The following paper highlights the importance of using critical AC and DC voltages during the inclined plane tracking and erosion tests. |
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| Publication date | 2019-10-03 |
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| Publisher | IEEE |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 181fffc0-b213-4da2-ba1d-a9bff7fe6c2f |
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| Record created | 2020-06-17 |
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| Record modified | 2020-06-17 |
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