Under the arc action, the impurity can easily react with the decomposed product of SF_6, and then produce poison which can corrupt electric equipment, degrade its insulation performance.
但是SF_6电气设备中的气体不可避免的含有杂质,在电弧作用下,这些杂质容易与SF_6气体的分解物反应生成毒性物质,从而腐蚀电气设备,降低设备绝缘能力。