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For the application of SF6/N2 in power equipment such as GIS and GIL, the breakdown characteristics of SF6/N2 in varying electric field non-uniformity under standard lightning impulse were studied in this paper based on a lightning impulse experimental platform. The research indicates that the reversal of polarity effect appears in SF6/N2 gas mixtures. That is, when the pressure is relatively low,...
Generally, as using the up-and-down method to research the discharge character of SF6 under impulse voltage, the requirement for dispersion of breakdown voltage is less than 3%, which guarantees the reliability of experimental data. But it is found that the dispersion of SF6 breakdown voltage, comparing with other gases, is usually large and even larger than 5%. This research has been still lack of...
SF6 is widely used in high-voltage equipment due to its excellent insulation ability. However, when the moisture content in SF6 exceeds a certain value, its insulation could be damaged, threatening the normal operation of high-voltage equipment. Therefore it's of great importance to establish proper control standards on moisture content in SF6. In this paper, the influence of moisture content on flashover...
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