Abstract: A contact mechanism includes a current path having a 360° winding formed by a plurality of conductor sections and having an axis that is perpendicular to a plane in which a rotary contact body is movable. The conductor sections include a first section with a first current conductor that extends to a fixed contact. A second conductor section extends through the fixed and rotary contacts. A third conductor section extends through the rotary contact. A final, conductor section, including a second current conductor, extends to the rotary contact body and runs parallel and in close proximity to the first current conductor. Each of the first and second current conductors are substantially parallel to the rotary contact body in the closed position and are formed as straight and rigid busbars having a length corresponding at least to a length of a contact arm of the rotary contact body.

Abstract: A contact mechanism includes a current path having a 360° winding formed by a plurality conductor sections and having an axis that is perpendicular to a plane in which a rotary contact body is movable. The conductor sections include a first section with a first current conductor that extends to a fixed contact. A second conductor section extends through the fixed and rotary contacts. A third conductor section extends through the rotary contact. A final, conductor section, including a second current conductor, extends to the rotary contact body and runs parallel and in close proximity to the first current conductor. Each of the first and second current conductors are substantially parallel to the rotary contact body in the closed position and are formed as straight and rigid busbars having a length corresponding at least to a length of a contact arm of the rotary contact body.

Abstract: A switching apparatus for a low-voltage electrical switch includes a rotary contact with switching pieces bearing at least two end contacts. The switching pieces are mounted at spatially variable pivot points. The rotary contact also includes a biasing member configured to apply a contact-pressure force. The switching apparatus also includes a housing and an arc quenching chamber.

Abstract: An operating mechanism, for a switch of a switching device disposed in a control cabinet having a door, includes a locking device having a locking element movable between a release position and a locking position. A spring device is configured to bias the locking element toward the release position. A force-transmitting member is operatively coupled to a resilient control member of the door, the force-transmitting member being configured to actuate the locking element.

Abstract: An auxiliary operating device for an electromechanical switching device having an operating mechanism. The auxiliary operating device including an actuating element couplable to the operating mechanism and movable between a first position and a second position, an actuation member movable relative to the actuating element between a third position and a fourth position, and a drive dog arrangement configured to cooperate with the actuating element and the actuation member. The auxiliary operating device further includes a coupling device movable between a release position and an operating position. The coupling device is configured, when in the operating position, so as to move the actuating element with the actuation member in a second direction of movement when the actuation member is in the third position. The coupling device is configured, when in the release position, so as to allow movement of the actuation member in the first and second directions between the third and fourth positions.

Abstract: An operating mechanism, for a switch of a switching device disposed in a control cabinet having a door, includes a locking device having a locking element movable between a release position and a locking position. A spring device is configured to bias the locking element toward the release position. A force-transmitting member is operatively coupled to a resilient control member of the door, the force-transmitting member being configured to actuate the locking element.

Abstract: An auxiliary operating device for an electromechanical switching device having an operating mechanism. The auxiliary operating device including an actuating element couplable to the operating mechanism and movable between a first position and a second position, an actuation member movable relative to the actuating element between a third position and a fourth position, and a drive dog arrangement configured to cooperate with the actuating element and the actuation member. The auxiliary operating device further includes a coupling device movable between a release position and an operating position. The coupling device is configured, when in the operating position, so as to move the actuating element with the actuation member in a second direction of movement when the actuation member is in the third position. The coupling device is configured, when in the release position, so as to allow movement of the actuation member in the first and second directions between the third and fourth positions.

Abstract: A switching shaft unit for an electrical contact system for use in a low-voltage breaker. The switching shaft unit includes a rotary contact moveably disposed, with play, in a switching shaft or a shifting shaft segment, and having a pair of bearing pins. The switching shaft unit further includes at least one contact piece configured to make switchable contact with at least one fixed contact, and at least one pair of force springs. Each force spring is supported by an associated respective support disposed in an interior of the switching shaft or the switching shaft segment, and an associated respective bearing pin, so that, upon an opening movement of the rotary contact, a connection line defined through the associated bearing pin and the associated support of at least one of the force springs is displaced over a breakover point plane so that the rotary contact remains in an open position.

Abstract: An electrodynamically tilting contact system for power circuit breakers includes an actuating shaft segment, a rotary contact bridge pivotally mounted therein and contact force springs that form components of a tilting snap-action mechanism, which holds the rotary contact bridge in a repulsed position after an electrodynamically effected repulsion of fixed contacts. Two rockers, while serving as an additional component of the tilting snap-action mechanism, are mounted on the rotary contact bridge in a manner that enables them to tilt. The contact force springs are supported between the actuating shaft segment and the rockers, whereby the spring longitudinal axes, the tilting axes of the rockers, and the rotational symmetry axis of the rotary contact bridge are located in the tilting point plane of the tilting snap-action mechanism.