Compressed gas power switch
AssigneeSiemens Aktiengesellschaft
InventorsDieter Lorenz, Bernd-Ulrich Habedank
Life of this patent
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Abstract
The invention relates to a compressed gas switch with two contact pieces, a contact element by-passing the contact pieces when in the on position, and two isolating distances connected to each other in series. The second contact piece opposing the first isolating distance is arranged axially by an annular piston to be displaceable forming a switching chamber. The switching chamber is separated from the heating chamber by a bulkhead partition having a current-dependent valve, and the second isolating distance is produced after opening of a blowing hole located between the second contact piece and the contact element.
Claims9
A compressed gas power switch for extinguishing a high short-circuit current arc, comprising:
- a first switching part and a second switching part, the first switching part and second switching part arranged at a distance from one another along a common axis, the second switching part being axially displaceable and connected to a piston movable within a switching chamber, the piston being driven by hot gas flowing from a heating chamber into the switching chamber;
- an axially displaceable contact part partially surrounded by the heating chamber, the axially displaceable contact part bridging the distance between the first switching part and the second switching part in an on state and moving away from the first switching part during a switch-off sequence, the second switching part moving away from the axially displaceable contact part when hot gas flows from the heating chamber into the switching chamber, wherein a first isolating distance is formed between the first switching part and the axially displaceable contact part, a second isolating distance being generated in series with the first isolating distance during actuation of the compressed gas power switch.
Dependencies are inferred from the claim text.