Surface arcing of insulators due to bentonite contamination |
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| Institution: | 1. Center for Electromagnetics and Lightning Protection (CELP), Universiti Putra Malaysia, Malaysia;2. Institute of High Voltage & High Current(IVAT), Universiti Teknologi Malaysia, Malaysia;1. Department of Biological Science and Technology, National Chiao Tung University, Hsinchu 300, Taiwan;2. Instrument Technology Research Center, NARL, Hsinchu 300, Taiwan;3. National Nano Device Laboratories, NARL, Hsinchu 300, Taiwan;1. Laboratoire de Génie Chimique, Université de Toulouse: INPT, UPS, CNRS, 4, Allée Emile Monso, F-31030 Toulouse, France;2. Laboratoire Matériaux et Durabilité des Constructions, Université de Toulouse: UPS, INSA, 135, avenue de Rangueil, F-31 077 Toulouse Cedex 04, France;3. Andra, 1-7, rue Jean-Monnet, 92298 Châtenay-Malabry, France;1. Laboratório de Crustáceos Decápodes, Instituto de Oceanografia, Universidade Federal do Rio Grande, FURG. Av. Itália, km 8, CEP: 96203-000, Rio Grande, RS, Brazil;2. Laboratório de Ecologia Molecular Marinha, Instituto de Oceanografia, Universidade Federal do Rio Grande, FURG. Av. Itália, km 8, CEP: 96203-000, Rio Grande, RS, Brazil;3. Laboratório de Genética, bloco 5, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande, FURG. Av. Itália, km 8, CEP: 96203-000, Rio Grande, RS, Brazil;1. School of Respiratory Therapy, College of Medicine, Taipei Medical University, Taipei, Taiwan;2. Division of Pulmonary Medicine, Department of Internal Medicine, Shuang Ho Hospital, Taipei Medical University, Taipei, Taiwan;3. Institute of Occupational Medicine and Industrial Hygiene, College of Public Health, National Taiwan University, Taipei, Taiwan;4. Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan;5. Department of Public Health, College of Public Health, National Taiwan University, Taipei, Taiwan;1. Centre Européen de la Céramique—Ecole Nationale Supérieure de Céramique Industrielle, Groupe d’Etudes des Matériaux Hétérogènes, 12 rue Atlantis, F-87068 Limoges, France;2. Centre Européen de la Céramique—Ecole Nationale Supérieure de Céramique Industrielle, Laboratoire Sciences des Procédés Céramiques et Traitements de Surface, 12 rue Atlantis, F-87068 Limoges, France;1. CEH, Bush Estate, Penicuik, EH26 0QB, UK;2. BAS, Madingley Road, High Cross, Cambridge, CB3 0ET, UK |
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| Abstract: | Impulse, alternating and direct voltage tests together with optical observations have been done under clean and polluted surface conditions with respect to bentonite, which is treated as a pollutant. The insulator materials tested were polymethyl methacrylate and polythene. Bentonite pollution may affect several surface flashover characteristics such as voltage at breakdown and 50% breakdown voltage under negative lightning impulse (1.2/50 μs) and the time to breakdown under wet condition for both negative and positive impulse voltage. There are four types of paths taken by the discharge channels, based on which the degree of degradation of the material surface may vary. |
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| Keywords: | Insulation Lightning impulse Surface flashover Breakdown strength |
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