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The evaluation of a method to determine pollution performance curves for HTV-SR insulators tested under AC in a natural marine pollution environment
Davey, R. L. 2025. The Evaluation of a Method to Determine Pollution Performance Curves for HTV-SR Insulators Tested Under AC in a Natural Marine Pollution Environment. Unpublished masters thesis. Stellenbosch: Stellenbosch University [online]. Available: https://scholar.sun.ac.za/items/b5d0809d-338...
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| Format: | Thesis |
| Language: | English |
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Stellenbosch : Stellenbosch University
2025
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| _version_ | 1867614019299311616 |
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| access_status_str | Open Access |
| author | Davey, Richardo Lee |
| author2 | Bekker, Johannes Cornelius |
| author_browse | Bekker, Johannes Cornelius Davey, Richardo Lee |
| author_facet | Bekker, Johannes Cornelius Davey, Richardo Lee |
| author_sort | Davey, Richardo Lee |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Davey, R. L. 2025. The Evaluation of a Method to Determine Pollution Performance Curves for HTV-SR Insulators Tested Under AC in a Natural Marine Pollution Environment. Unpublished masters thesis. Stellenbosch: Stellenbosch University [online]. Available: https://scholar.sun.ac.za/items/b5d0809d-338a-4cf5-b42f-13ed0da86b0c |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/132157 |
| institution | Stellenbosch University (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:45:22.846Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2025 |
| publishDateRange | 2025 |
| publishDateSort | 2025 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/132157 The evaluation of a method to determine pollution performance curves for HTV-SR insulators tested under AC in a natural marine pollution environment Davey, Richardo Lee Bekker, Johannes Cornelius Vosloo, Wallace Lockwood Stellenbosch University. Faculty of Engineering. Dept. of Electrical & Electronic Engineering. Electric insulators and insulation -- Testing Marine pollution -- Environmental aspects Silicone rubber -- Testing UCTD Davey, R. L. 2025. The Evaluation of a Method to Determine Pollution Performance Curves for HTV-SR Insulators Tested Under AC in a Natural Marine Pollution Environment. Unpublished masters thesis. Stellenbosch: Stellenbosch University [online]. Available: https://scholar.sun.ac.za/items/b5d0809d-338a-4cf5-b42f-13ed0da86b0c Thesis (MEng)--Stellenbosch University, 2025. ENGLISH ABSTRACT: This study evaluates a method for determining pollution performance curves of high-temperature vulcanised silicone rubber (HTV SR) long rod insulators tested under natural severe marine pollution conditions at the Koeberg Insulator Pollution Test Station (KIPTS). The pollution flashover performance was assessed by calculating critical flashover voltage and deriving pollution performance parameters, which were integrated into the statistical selection method outlined in IEC/TS 60815-1. Five HTV SR long rod insulators of varying creepage distances from the same manufacturer were tested alongside a reference antifog glass cap-and-pin disc insulator. The results from the statistical dimensioning indicate that the antifog glass cap-and-pin disc insulator required the highest specific creepage distance (SCDR) compared to the HTV SR long rod insulators. This result is consistent with published results of the pollution performance of hydrophobicity transfer material (HTM) polymeric and hydrophilic ceramic insulators. Among the HTV SR insulators, the HTV 420 with the lowest test creepage distance resulted in the highest required SCDR and the largest deviation. This is likely attributed to more significant hydrophobicity loss observed in related studies. On the other hand, the HTV 795 exhibited the lowest deviation from the average required SCDR and maintained a high pollution withstand capability with reduced hydrophobicity loss. The methodology used in this study follows IEC/TS 60815-1, Approach 2 (measure and design), with the main difference being that insulator pollution performance curves are derived from natural pollution and wetting instead of artificial laboratory testing. The average required SCDR for the tested HTV SR long rods was calculated at 17.78 mm/kV, corresponding to a required unified specific creepage distance (USCDR) of 30.8 mm/kV. These findings highlight the method's applicability to determine pollution performance curves for HTV SR insulators tested under severe marine environments. AFRIKAANSE OPSOMMING: Hierdie studie evalueer 'n metode vir die bepaling van besoedelingsprestasiekurwes van hoë-temperatuur gevulkaniseerde silikoonrubber (HTV SR) isolators wat onder natuurlike swaar mariene besoedelingsomstandighede by die Koeberg Insulator Pollution Test Station (KIPTS) getoets is. Die besoedelingsoorvonkprestasie is beoordeel deur die kritieke oorvonkspanning te bereken en besoedelingsprestasieparameters af te lei, wat geïntegreer is in die statistiese seleksiemetode soos uiteengesit in IEC/TS 60815-1. Vyf HTV SR langstaaf-isolators met verskillende kruipafstande vanaf dieselfde vervaardiger is saam met 'n verwysing-anti-mis glas skyf-isolator getoets. Die resultate van die statistiese dimensionering toon dat die anti-mis glas skyf-isolator die hoogste spesifieke kruipafstand (SCDR) vereis het in vergelyking met die HTV SR isolators. Hierdie resultaat stem ooreen met gepubliseerde resultate van die besoedelingsprestasie van hidrofobisiteitsoordragmateriaal (HTM) polimere en hidrofiliese keramiese isolators. Onder die HTV SR isolators het die HTV 420 met die laagste toets-kruipafstand die hoogste vereiste SCDR en die grootste afwyking getoon. Dit kan waarskynlik toegeskryf word aan meer beduidende hidrofobisiteitsverlies wat in verwante studies waargeneem is. Aan die ander kant het die HTV 795 die laagste afwyking van die gemiddelde vereiste SCDR getoon en 'n hoë besoedelingsweerstandvermoë gehandhaaf met verminderde hidrofobisiteitsverlies. Die metodologie wat in hierdie studie gebruik is, volg IEC/TS 60815-1, Benadering 2 (meet en ontwerp), met die hoofverskil dat isolator-besoedelingsprestasiekurwes afgelei word van natuurlike besoedeling en natmaking, in plaas van kunsmatige laboratoriumtoetse. Die gemiddelde vereiste SCDR vir die getoetste HTV SR isolators is bereken as 17.78 mm/kV, wat ooreenstem met 'n vereiste verenigde spesifieke kruipafstand (USCDR) van 30.8 mm/kV. Hierdie bevindings beklemtoon die metode se toepaslikheid, om besoedelingsprestasiekurwes vir HTV SR isolators te bepaal in swaar mariene omgewings. Masters 2025-05-28T08:06:15Z 2025-05-28T08:06:15Z 2025-03 Thesis https://scholar.sun.ac.za/handle/10019.1/132157 en Stellenbosch University xvi, 104 pages : illustrations application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | Electric insulators and insulation -- Testing Marine pollution -- Environmental aspects Silicone rubber -- Testing UCTD Davey, Richardo Lee The evaluation of a method to determine pollution performance curves for HTV-SR insulators tested under AC in a natural marine pollution environment |
| title | The evaluation of a method to determine pollution performance curves for HTV-SR insulators tested under AC in a natural marine pollution environment |
| title_full | The evaluation of a method to determine pollution performance curves for HTV-SR insulators tested under AC in a natural marine pollution environment |
| title_fullStr | The evaluation of a method to determine pollution performance curves for HTV-SR insulators tested under AC in a natural marine pollution environment |
| title_full_unstemmed | The evaluation of a method to determine pollution performance curves for HTV-SR insulators tested under AC in a natural marine pollution environment |
| title_short | The evaluation of a method to determine pollution performance curves for HTV-SR insulators tested under AC in a natural marine pollution environment |
| title_sort | evaluation of a method to determine pollution performance curves for htv sr insulators tested under ac in a natural marine pollution environment |
| topic | Electric insulators and insulation -- Testing Marine pollution -- Environmental aspects Silicone rubber -- Testing UCTD |
| url | https://scholar.sun.ac.za/handle/10019.1/132157 |
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