It is a very high advancement to the development from two - pressure arc - quenching chamber and single - pressure arc - quenching chamber to the self - energy arc - quenching chamber now for arc - quenching theory of sf6 cb make use of the arc blocking effect , namely arc - self - energy , to increase sf6 gas pressure in the arc - quenching chamber and get the efficient blasting effect to extinguish the arc when the arc current is zero Sf _ 6断路器从双压式、单压式发展到如今的自能式是断路器灭弧原理的一个重大飞跃。自能式sf _ 6断路器利用电弧阻塞效应即利用电弧本身的能量使灭弧室内sf _ 6气体的压力升高，在电弧过零时产生有效的气吹而熄灭电弧。
