Application Status composite insulators

    When the composite insulators for the DC system is how to choose the right climb from even become a big problem. This is because the Fog type can study abroad at dc resistance of composite insulators under too; partly because DC composite insulators operating experience and few, their contamination law in a variety of contamination is not enough clearly too little data for reference; a third aspect of the problem also is that even in the same filthy, there is also the porcelain insulator flashover voltage positive and negative polarities of significant differences that exist so-called polar effect, and because the polar Effects of the same shape, creepage distance of porcelain insulators in the same contamination degree rms voltage DC flashover voltage is lower than AC flashover, the orthogonal ratio of less than 1.0. Therefore, when the composite insulators for DC system would need to climb to select from cause to pay particular attention, neither should appear according to AC Flashover Performance Select creepage distance resulting in frequent tripping, do not blindly excessive increase creepage distance, not too close sheds conducive to the self-cleaning insulators, are likely to cause bridging between sheds, to improve pollution flashover and wet flashover voltage may have little effect, even counterproductive.