{"title":"Final breakdown mechanism","authors":"S. Pélissou, B. Noirhomme, J. Parpal","doi":"10.1109/ICPADM.1991.172287","DOIUrl":null,"url":null,"abstract":"Preliminary results on the final breakdown mechanism of XLPE (cross-linked polyethylene) insulated field-aged cables are presented. The main goal is to determine the conditions that lead to the growth of electrical trees from water trees. Samples peeled off from two 28 kV and well-characterized (density, impurity and water content, field-water-tree density, oxidation) cables are considered. Aging conditions were 10 kV/mm, 60 Hz, 0.05 M NaCl solution, and 22-23 degrees C. The results indicate that after 8000 h of aging the lab-water-tree length reaches 65-70% of the sample thickness and is not much affected by the presence of field water trees. The influence of the physico-chemical properties and AC breakdown strength is also reported.<<ETX>>","PeriodicalId":6450,"journal":{"name":"[1991] Proceedings of the 3rd International Conference on Properties and Applications of Dielectric Materials","volume":"40 1","pages":"1177-1180 vol.2"},"PeriodicalIF":0.0000,"publicationDate":"1991-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"[1991] Proceedings of the 3rd International Conference on Properties and Applications of Dielectric Materials","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICPADM.1991.172287","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 2
Abstract
Preliminary results on the final breakdown mechanism of XLPE (cross-linked polyethylene) insulated field-aged cables are presented. The main goal is to determine the conditions that lead to the growth of electrical trees from water trees. Samples peeled off from two 28 kV and well-characterized (density, impurity and water content, field-water-tree density, oxidation) cables are considered. Aging conditions were 10 kV/mm, 60 Hz, 0.05 M NaCl solution, and 22-23 degrees C. The results indicate that after 8000 h of aging the lab-water-tree length reaches 65-70% of the sample thickness and is not much affected by the presence of field water trees. The influence of the physico-chemical properties and AC breakdown strength is also reported.<>
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