SF6 circuit breaker is typically using several dozen to atmospheric pressure SF6 gas, a high velocity air stream in the spout to extinguish the arc.

Recommended storage using a predetermined high-pressure sulfur hexafluoride gas circuit breaker, is formed in the high velocity gas stream is strongly hit the arc interrupter, the insulating cooling chamber, when the arc burns in a high speed gas flow, the heat quenching the arc will promptly be taken away, the arc, rapidly moving stream of metal vapor and the heat emission greatly reduced close to zero and the current through zero in particular, the temperature decreases rapidly quenching the arc, the arc diameter decreased, when the current zero in the strong gas flow, arc-quenching temperature quickly dropped free hot temperature, the arc extinguishing residue was eliminated by substitution of fresh compressed SF6 gas, the arc is extinguished.