Electrical circuit breaker with self-extinguishing expansion and insulating gas
AssigneeMerlin Gerin
InventorsJean-Pierre Kersusan, Hugues Filiputti, Victor Pennucci, Peter Malkin
Life of this patent
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Abstract
An inside of tubular contacts of a self-extinguishing expansion SF.sub.6 -gas circuit breaker including guiding ribs arranged to oppose any vortex-effect swirling gas flow between a first extinguishing chamber and a second expansion chamber. The presence of these ribs improves the dielectric withstand of the circuit breaker, and prevents any arc restriking inside the contacts.
Claims7
A self-extinguishing expansion electrical circuit breaker including a sealed enclosure filled with a high dielectric strength insulating gas, and housing one or more pole-units, each of the pole units comprising:
- a first extinguishing chamber disposed within the enclosure for storing insulating gas;
- a pair of arcing contacts disposed in said first chamber which are axially translatable with respect to each other and define a breaking gap therebetween when separated in which an arc is formed;
- a tubular gas outflow duct arranged inside at least one of said contacts for communicating said first chamber with a second chamber formed by a remaining volume of the enclosure disposed around said first chamber;
- and
- guiding means arranged on an interior of the duct for opposing Vortex-effect swirling gas flow therethrough.
Dependencies are inferred from the claim text.