Device for interrupting non-short circuit currents only, in particular disconnector or earthing switch

A device for interrupting non-short-circuit currents only, the device comprising:

• at least two contacts movable in relation to each other between a closed state and an open state and defining an arcing region, in which an arc is generated during a current interrupting operation and in which an arc-quenching medium comprising an organofluorine compound is present, wherein
• a counter-arcing component is allocated to the arcing region and is designed for counteracting the generation of the arc and/or is designed for supporting extinction of the arc, wherein
• one of the contacts is in the form of a piston contained by the other contact forming a cylinder and being slideably moveable in the cylinder in a gas-tight manner, the piston and the cylinder together forming a suction chamber as the flow-generating chamber, said suction chamber being designed to increase in volume during a relative movement of the contacts from a closed state to an open state.