Abstract: The invention relates to a mechanical switching contact having an insulating material support (1), on which fixed contacts (4, 5, 6) are arranged. Furthermore, a switching lever (2) is mounted such that it can rotate on the insulating material support (1) and has a pivoting arm (22). In addition, a pivotable contact housing (3) is also mounted on the insulating material support (1), which contact housing bears parallel contact fingers (9, 10), which surround the respectively connected fixed contacts (4, 5, 6) on both sides when contact is made.

Abstract: The invention relates to a mechanical switching contact having an insulating material support (1), on which fixed contacts (4, 5, 6) are arranged. Furthermore, a switching lever (2) is mounted such that it can rotate on the insulating material support (1) and has a pivoting arm (22). In addition, a pivotable contact housing (3) is also mounted on the insulating material support (1), which contact housing bears parallel contact fingers (9, 10), which surround the respectively connected fixed contacts (4, 5, 6) on both sides when contact is made.

Abstract: A load changeover switch for a tap changer with two permanent main contact pairs for each phase to be switched, wherein the fixed contacts thereof are each time bridged over by a movable permanent main contact. The fixed permanent main contacts consist of a plurality of contact plates, which are articulated by means of contact springs, in the manner that the direction of deflection of the individual contact plates corresponds in each instance with the direction of impinging of the movable permanent main contact.

Abstract: The invention relates to a load changeover switch for a tap changer with two permanent main contact pairs for each phase to be switched, wherein the fixed contacts thereof are each time bridged over by a movable permanent main contact. The fixed permanent main contacts consist of a plurality of contact plates, which are articulated by means of contact springs, in the manner that the direction of deflection of the individual contact plates corresponds in each instance with the direction of impinging of the movable permanent main contact.

Abstract: The invention relates to a mechanical switching contact for bipolar commutation comprising an insulating support having fixed contacts disposed thereon. Said contacts are switchable by means of a contact carrier which possesses a pivoting arm on the free end thereof with a respective conducting contact element. The whole mechanical switching contact is configured as a modular unit which can be assembled in an optional manner.

Abstract: The invention relates to a load selector for step switches in step transformers with two movable selector contacts. A suitable vacuum switch is located downstream of the first movable selector contact to switch the load current and a suitable switch for switching the compensation current is located downstream of the second movable selector contact. Both of the selector contacts are independently movable in such a way that one of the selector contacts moves slowly and the other selector contact rapidly moves or jumps between positions. The sequence of operation of the selector contacts is independent of the switching direction.

Abstract: A stepper drive for a step-type transformer has an upper geneva wheel rotatable about a wheel axis, a lower geneva wheel spaced below the upper wheel and also rotatable about the axis, and a driver rotatable about a driver axis adjacent the wheels and having an upper abutment engageable with the upper wheel and a lower abutment engageable with the lower wheel and offset by about 180.degree. relative to the driver axis from the upper abutment. A selector abutment is provided on the upper wheel offset from the axis thereof. A selector lever pivotal about a selector axis offset from the wheel axis is engageble with the selector abutment in end positions of the upper wheel. A blocking plate shiftable radially on the lever between an actuated position and an unactuated position is urged by a spring into the unactuated position.