Abstract: An electromechanical circuit breaker for establishing and breaking the current in a main circuit includes a fixed contact element and a moving contact element, which in a first position are in electrical contact with each other for carrying the current of the main circuit, the moving contact element being adapted to be displaced to a second position in which it is separated from the fixed contact element so that the current in the main circuit is cut off. The circuit breaker is provided with a blow-out device including a magnetizing coil traversed by a magnetizing current for producing a magnetic field adapted to drive an arc generated by the separation of the two contact elements into an arc extinction element.

Abstract: The electromechanical circuit breaker is intended to establish and break the current in a main circuit (3, 4) and comprises a fixed contact element (5) and a moving contact element (6) which in a first position are in electrical contact with each other for carrying the current of the main circuit (3, 4). Said moving contact element (6) is adapted to be displaced to a second position in which it is separated from the fixed contact element (5) so that the current in the main circuit is cut off. The circuit breaker is provided with a blow-out device (2) comprising a magnetising coil (8) traversed by a magnetising current for producing a magnetic field (26) adapted to drive an arc generated by the separation of said two contact elements (5, 6) into an arc extinction means. The blow-out device (2) comprises electrodes (12) electrically connected to the magnetising coil (8) and adapted to cooperate with said arc in such a manner that the latter generates said magnetising current in the magnetising coil (8).

Abstract: A switch has a vacuum interrupter and a switch housing which holds the vacuum interrupter between two supply terminals. The vacuum interrupter contains a tubularly constructed, evacuated housing with a fixed contact member and movable contact member. A movable contact carrier of the movable contact member is guided out of the housing in a vacuum-tight manner by a bellows and is held on the housing axis by a slideway. The slideway has a bushing which is detachably mounted on a flange of the housing. The bushing has an axially aligned guide groove situated on an inner surface. A guide element held on the sliding body of the movable contact carrier is guided in this guide groove. The switch prevents undesired axial, radial and torsional acting forces from damaging the bellows, and therefore, ensures the vacuum-tightness of the vacuum interrupter is maintained during manufacturing assembly and operation.