Discussion on the feasibility of vacuum gap and CO2 gas gap in series for the high current interruption

Nowadays, the use of SF₆ gas is limited and a new kind of environment-friendly circuit breaker is an urgent need in high-voltage switch area. In this paper, the research status of low-carbonization in the high-voltage switch field is introduced, the steps how to apply the gaps system with vacuum gap and CO₂ gap in series to the high voltage switch field is proposed. Its key behaviors include the dynamic dielectric recovery, the interreaction relationship of vacuum arc and CO₂ gas arc, and the synergistic control strategy between vacuum arc and CO₂ gas arc. Vacuum arc and CO₂ gas arc are generated in the operation of vacuum gap and CO₂ gas gap in series. It will be a feasible proposal connecting vacuum gap and CO₂ gap in series as a high voltage switch to interrupt short-circuit current based on the above-mentioned problems are proved.