ARC extinguishing chamber for an electric protection apparatus and electric protection apparatus comprising same

摘要

The present invention relates to an arc extinguishing chamber of an electric protection apparatus comprising an arc formation chamber containing a stationary contact and a movable contact which, when they separate, form an arc between them, said arc formation chamber communicating with the inlet of a second chamber, called arc extinguishing chamber. This chamber comprises a wall called balancing wall, substantially solid at least on its central part, said wall being located downstream from the arc extinguishing chamber and being formed and arranged with respect to the arc extinguishing chamber in such a way as to slow down the exhaust flow of the breaking gases on the side of the arc extinguishing chamber where the gases go first, and enhancing flow of the exhaust gases on the opposite side, the exhaust gases being stopped by the central part of the wall and escaping via the edges of the wall.

主权项

1. An arc extinguishing chamber of an electric protection apparatus comprising
an arc formation chamber containing a stationary contact and a movable contact which, when separated, form an arc therebetween, said arc formation chamber communicating with the inlet of an arc extinguishing chamber; and a balancing wall substantially solid at least at a central part, said balancing wall being located downstream from the arc extinguishing chamber and being formed and arranged with respect to the arc extinguishing chamber in such a way as to slow down the exhaust flow of exhaust gases on a side of the arc extinguishing chamber situated opposite the stationary contact, the exhaust gases being stopped by the central part of the balancing wall and escaping via the edges of the wall, wherein said central part of the balancing wall is a solid central part having a variable width being maximum on the side of the arc extinguishing chamber where the gases flow first, and being progressively reduced as an opposite side of said chamber is approached.