| 摘要 |
The present invention relates to an arc extinguishing chamber (7) of an electric protection apparatus comprising an arc formation chamber containing a stationary contact (4) and a movable contact (3) which, when they separate, form an arc (a) 10 between them, said arc formation chamber communicating with the inlet of a second chamber, called arc extinguishing chamber. This chamber is characterized in that it comprises a wall called balancing wall (14), substantially solid at least on its central part, said wall (14) being located downstream from the arc extinguishing chamber (9) and being formed and arranged with respect to the arc extinguishing chamber (9) in such a way as to slow down the exhaust flow of the breaking gases on the side i of the arc extinguishing chamber (9) where the gases go first, and enhancing flow of the exhaust gases on the opposite side j, the exhaust gases being stopped by the central part of the wall (14) and escaping via the edges (20) of the wall (14). Fig.2. |
