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SF6安全保障专家
专注于SF6气体检测的专业化
What is the role of the electronegativity of SF6 gas in the arc quenching process?
发布时间：2016-01-15
来源：ydlcb 浏览次数：52次
When the arc is burned in SF6 gas, almost all SF6 gas in the arc space is resolved to F and S in single atomic states under the action of high arc temperature. At the moment of arc current crossing zero, because F and S have strong electronegativity, a large number of adsorption and capture of free electrons, forming negative ions, so that F- in the current snack sharply increased, the mass of these negative ions are very large, thousands of times that of electrons. When the polarity is opposite after the current crossing zero, these negative ions move slowly, resulting in a great increase in the probability of combining with positive ions, so that a large number of negative ions compound, so the recovery of the dielectric strength of the arc gap is greatly accelerated.