| Download | - View author's version: Tracking and erosion of silicone rubber and EPDM insulation in the DC inclined plane test (PDF, 980 KiB)
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| DOI | Resolve DOI: https://doi.org/10.1109/TDEI.2021.009684 |
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| Author | Search for: Ghunem, Refat Atef1; Search for: Cherney, Edward A.; Search for: Jayram, Shesha 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; EPDM; outdoor insulation; ATH; inorganic fillers; residue; degradation; insulation; surface resistance; fires; insulation life; combustion; rubber |
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| Abstract | This paper investigates the tracking and erosion of silicone rubber and EPDM insulation in the DC inclined plane tracking and erosion test. Silicone rubber filled with alumina tri-hydrate fails due to combustion in the gas phase or erosion paths, but with no evidence of tracking. EPDM fails due to tracking and surface capturing fire, from dry-band arcing leaving a black residue while impinging the surface. Carbonaceous residue on EPDM gives rise to leakage current magnitude, whereas fused silica-based residue on silicone rubber is shown to promote combustion. A high amount of alumina tri-hydrate replacing the polymeric fuel in the composite is shown as a primary factor preventing failure and changing the nature of the residue in the DC inclined plane tracking and erosion test. Depolymerization is the main degradation mechanism reported for silicone rubber and EPDM, with notable degrees of crosslinking reported only for silicone rubber. Crosslinking reduces the amount of silicone rubber undergoing depolymerization, thus, the amount of fuel prone to combustion is reported to promote a coherent residue shield against the eroding dry-band arcing. |
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| Publication date | 2021-10 |
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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 | b4ce1b5c-a1c8-4956-8431-2900a23ff9f0 |
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| Record created | 2021-11-30 |
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| Record modified | 2021-11-30 |
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