| 摘要 |
The inventive circuit breaker-contactor ( 1 ) comprises a fixed contact, a contact ( 5 ) movable ( 19, 21 ) with respect to the fixed contact between open and closed positions, means ( 7 ) for displacing the movable contact ( 5 ) in the closed position thereof, means ( 9 ) for displacing the movable contact in the open position. According to said invention, said circuit breaker-contactor comprises means ( 11 ) for locking the movable contact ( 5 ) in the closed position thereof, a piezo-electric actuator ( 13 ) deformable from a rest position to an operating position for displacing the locking means ( 11 ) in such a way that the movable contact ( 5 ) is enabled to be displaced to the open position by the means ( 9 ) for displacing to the open position and an electronic power supply and control unit ( 15 ) for feeding and controlling the piezo-electric actuator ( 13 ) deformation in the operating position for displacing the locking means ( 11 ) in such a way that the movable contact ( 5 ) is unlocked in response to an electric current detected by the fixed contact ( 1 ).
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