Dynamic Drop Testにおける帯電及び塩分による試料表面の撥水性への影響
2009
Studies on the development of deterioration/ performance evaluation method for outdoor electric insulation of polymer materials are pushed forward now in the International Council on Large Electric Systems (CIGRE). The small scale test method (Dynamic drop test; DDT) which could evaluate disappearance characteristics of hydrophobicity easily was suggested. This test is to evaluate resistance of a sample to loss of hydrophobicity due to moisture and simultaneous electric stress. As factors for deterioration of hydrophobicity on a sample in DDT, various factors such as electrical influence, physical influence by water droplets and so on were considered. In this study, we investigated two kinds of factors (electrification and salt) affecting deterioration of hydrophobicity on the surface of a silicone rubber until ignition of continuous electrical discharge in DDT.
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