Electrical switching device

Electrical switching device having a longitudinal axis, comprising an arcing volume and at least an arcing contact arrangement with a first arcing contact and a mating second arcing contact, and further comprising an exhaust system with at least one exhaust volume,

• wherein for closing and opening the electric switching device at least one of the arcing contacts is movable parallel to the longitudinal axis and cooperates with the other arcing contact, and the electrical switching device comprises a dielectric insulating medium, and
• wherein inside the exhaust volume at least one intermediate volume is arranged, enclosed by an intermediate wall, comprises at least one inlet opening for receiving exhaust gas coming from an arcing region, and comprises at least one outlet opening, wherein the outlet opening is facing an opposing wall for producing at least one exhaust gas jet and for discharging the at least one exhaust gas jet towards and impacting the at least one exhaust jet on the opposing wall,
• wherein the switching device has means for changing a size of the intermediate volume;
• and
• wherein the means comprises at least one actuator and at least one spring attached to the actuator for positioning a moveable wall, and
• wherein a base position of the moveable wall adjustable by one of the actuator or by a base position of the spring, and the spring has such a rigidity that the spring permits a volume change of the intermediate volume within an adaptation range of maximum ±90% with respect to a base volume of the intermediate volume defined by the base position of the moveable wall.

Electrical switching device having a longitudinal axis, comprising an arcing volume and at least an arcing contact arrangement with a first arcing contact and a mating second arcing contact, and further comprising an exhaust system with at least one exhaust volume,

• wherein for closing and opening the electric switching device at least one of the arcing contacts is movable parallel to the longitudinal axis and cooperates with the other arcing contact, and the electrical switching device comprises a dielectric insulating medium, and
• wherein inside the exhaust volume at least one intermediate volume is arranged, enclosed by an intermediate wall, comprises at least one inlet opening for receiving exhaust gas coming from the arcing region, and comprises at least one outlet opening, wherein the outlet opening is facing an opposing wall, for producing at least one exhaust gas jet and for discharging the at least one exhaust gas jet and impacting the exhaust gas jet on the opposing wall,
• wherein the switching device has means for changing a size of the intermediate volume;
• and
• wherein a first moveable wall or a second moveable wall, is delimiting the intermediate volume on one side and is arranged transversally to the longitudinal axis and shiftable parallel to the longitudinal axis by at least an actuation device.