Controlled opening and closing switch with automatic opening in the event of current overload

摘要

PCT No. PCT/FR84/00003 Sec. 371 Date Aug. 14, 1984 Sec. 102(e) Date Aug. 14, 1984 PCT Filed Jan. 4, 1984 PCT Pub. No. WO84/02802 PCT Pub. Date Jul. 19, 1984.The switch comprises a stationary contact (2) and a moving contact (3) subjected to the action of a magnetic component (12). The moving contact (3) is carried by a rocker-arm (4) which pivots about a pin (10) rigidly fixed to a control device (6). The extremity (4a) of the rocker-arm carries a second pivot-pin (15) which is connected to a mechanical threshold device (18). The second pivot-pin is capable of displacement between a normal position in which the contacts (2, 3) can be closed and opened by the control device and a trip position in which the contacts are permanently separated. The magnetic component (12) occupies a position such as to exert on the rocker-arm (4) a torque which increases the contact pressure prior to tripping of the threshold device and produces a pivotal displacement of the rocker-arm about its pivot-pin (10) in the direction of opening of the contacts after tripping of the threshold device (18).