Patent ID: 8648273

Claim:
A switching installation comprising: a gas-filled enclosure; an input conductor arranged to carry an input voltage; solid insulation arranged between the input conductor and the enclosure to insulate them from each other; a ground point; an actuator; and a short-circuit device, wherein the short-circuit device is changeable from a first condition in which the solid insulation is insulating the input conductor from the enclosure to a second condition in which the short-circuit device forms a non-interrupted, metallic grounding path between the input conductor and the ground point through the solid insulation, and the actuator is arranged to actuate the short-circuit device from the first condition to the second condition upon the occurrence of a first arc in the enclosure, wherein the actuator is arranged to react on an increase in pressure in the enclosure upon the occurrence of the first arc, and wherein the actuator comprises a mechanical link with the enclosure and the actuator is arranged to transfer an expansion of a part of the enclosure to the short-circuit device using the mechanical link.