Gas-insulated low- or medium-voltage switch with swirling device

A gas-insulated low- or medium-voltage switch for system voltages within 1 to 52 kV and for up to 2000 A rated current, the switch comprising:

• first and second contacts being movable in relation to each other along an axis of the switch and defining a quenching region in which an arc is formed during a current breaking operation;
• and
• an arc-extinguishing system for extinguishing the arc during the current breaking operation, including:
• a pressurization system having a pressurizing chamber for pressurizing a quenching gas during the current breaking operation, wherein the pressurizing chamber is a puffer chamber with a piston arranged for compressing the quenching gas within the puffer chamber during the current breaking operation, and one of the piston and a remaining portion of the puffer chamber is movable together with the first or second contact;
• a nozzle system connecting the pressurization system with the quenching region, the nozzle system having a nozzle at an outlet of the nozzle system for blowing the pressurized quenching gas onto the arc formed in the quenching region during the current breaking operation;
• and
• a swirling device configured for generating a subsonic swirl flow of the quenching gas onto the quenching region during the current breaking operation, wherein the swirling device is arranged at an entrance of the nozzle system.