High-pressure gas disconnect system with braking device...

H - Electricity – 01 – H

Patent

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Details

H01H 9/00 (2006.01) H01H 3/60 (2006.01) H01H 33/91 (2006.01)

Patent

CA 2193721

his invention relates to a high-pressure gas disconnect system in which the moving contact is fastened to a connector rod (16) that is fitted coaxially with the fixed brake cylinder (26). The cylinder is flanked by transverse walls (30, 32) at either end and is installed within the cylinder space so defined (34). The connector rod (16) has a drive coupling (46) that drives the brake piston (36) in the final part of the opening stroke, creating excess pressure in the sub-space (38) and a partial vacuum in the second sub-space (40). The invention calls for the brake piston to be set on a socket surrounding the connector rod, the socket and connector rod defining an annular cylinder space between the drive element and a thrust ring on the socket that mates with that element, generating pressure when the disconnect system starts up. A strong braking effect is thus very quickly and smoothly achieved.

L'invention concerne un disjoncteur à gaz sous pression dans lequel l'élément de contact mobile est fixé à une tige de raccordement (16), qui traverse dans le sens coaxial le cylindre de freinage (26) fixe. Ce dernier présente des parois transversales (30, 32) aux deux extrémités, et est disposé dans l'espace de cylindre (34) ainsi fermé. La tige de raccordement (16) présente une butée d'entraînement (46) qui entraîne le piston de freinage (36) dans une section finale de la course d'ouverturer, d'où il se crée une surpression dans le premier sous-espace (38) et une sous-pression dans le second sous-espace (40). Selon l'invention, le piston de freinage est disposé sur une douille entourant la tige de raccordement, la douille et la tige de raccordement délimitant un espace de cylindre annulaire existant entre l'élément d'entraînement et une contrebutée concourante à ce dernier et prévue sur la douille, une pression se formant lors de l' ouverture du disjoncteur. L'on obtient ainsi très rapidement une force de freinage élevée, sans chocs.

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