Electrical contactor with recirculation of ionized gases

A double-break contactor comprising:

• a contactor chamber comprising:
• a bridge being movable between a closed state and an open state, comprising a first movable contact and a second movable contact,
• a first fixed contact facing the first movable contact, and
• a second fixed contact facing the second movable contact,
• at least one electric arc extinction zone, each comprising two electric arc extinction blocks facing each other on either side of the movable bridge and each including a plurality of fins each extending along a longitudinal axis (Xa, Xb),
• wherein:
• the contactor chamber is closed;
• each electric arc extinction zone is especially delimited by:
• two side walls facing each other each located on the side of an electric arc extinction block and at a distance from the fins thereof, each having an inner surface,
• an upper wall located on the side of a fixed contact, and
• a lower wall facing the upper wall, at a distance from the fins of the electric arc extinction blocks and connected to each side wall by a link having a concave inner surface with a curved cross-section;
• wherein
• the fins are away from the side walls and the lower wall at least by a distance of between 3 mm and 20 mm, and wherein
• the fins of each electric arc extinction block are tilted so that their longitudinal axis (Xa, Xb) forms an angle α of between 30 degrees and 85 degrees relative to the inner surface of the closest side wall, wherein the angle α is oriented such that the edge of the fins closest to a side wall is closer to the lower wall than to the upper wall.