SF6气体的电气特性
Electrical characteristics of SF6 gas
绝缘性能佳，还具有独特的热特性和电特性。 SF6气体是电负性气体，其分子和原子具有很强的吸附自由电子的能力，可以大量吸附弧隙中的自由电子，生成负离子。负离子的运动比自由电子慢得多，很容易和正离子复合成中性的分子和原子，大大加快了电流过零时的弧隙介质强度的恢复。
Good insulation performance, but also has a unique thermal and electrical characteristics. SF6 gas is an electronegative gas. Its molecules and atoms have a strong ability to adsorb free electrons, which can adsorb a large number of free electrons in the arc gap and generate negative ions. The motion of negative ions is much slower than that of free electrons. It is easy to combine with positive ions to form neutral molecules and atoms, which greatly accelerates the recovery of the dielectric strength of the arc gap when the current is over zero.