Power circuit-breaker

Details Power circuit-breaker Power circuit-breaker

1996-06-12

1999-04-27

Coggins, Wynn Wood

High-voltage switches with arc preventing or extinguishing devic

Arc preventing or extinguishing devices

Air-current blowout

218 61, 218 66, 218 84, H01H 3388, H01H 3304

Patent

active

058981497

ABSTRACT:
This power circuit-breaker has at least one cylindrically constructed arcing chamber which is provided with a stationary contact, with a moving contact and with a quenching zone between the two contacts. A shaft of the moving contact is permanently connected to a blowout volume which is closed off on the stationary contact side by an insulating nozzle through which at least one flow channel passes. The arcing chamber has a first compression volume which is operatively connected to the blowout volume and to a second compression volume. It is intended to provide a power circuit-breaker in which the blowing-out of the arc with pure SF.sub.6 gas is made stronger. This is achieved by providing a moving auxiliary piston between the first compression volume and the second compression volume and by the auxiliary piston being connected to the moving contact via a direction-changing device.

REFERENCES:
patent: 4329553 (1982-05-01), Graf
patent: 4524257 (1985-06-01), Slamecka
patent: 5478980 (1995-12-01), Freeman et al.
patent: 5561280 (1996-10-01), Blatter
patent: 5587571 (1996-12-01), Perret
patent: 5589673 (1996-12-01), Lehmann et al.
patent: 5600111 (1997-02-01), Dufournet

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