Device for transmission of forces

An apparatus for introducing an electromagnetic force onto a moving contact connection pin of a contact system including a switching device, the switching device including a moving contact and a further contact, the apparatus comprising:

• an at least partially flexible conductor element, to electrically connect the moving contact connection pin to a connection of the switching device;
• and
• at least one first limb and a second limb, arranged for reciprocal current flow, the at least one first limb being arranged in a stationary manner in a housing of the switching device and including two portions fixed to the housing on either side of a connection piece positioned between the two portions to electrically connect the at least one first limb to an external system through the connection piece, and the second limb being guidable along a movable supporting plate, movable laterally in a sliding manner in the housing of the switching device between side walls of the housing and guided by at least a guide surface of the connection piece, the moving contact connection pin being fixedly connected to the movable supporting plate such that, upon a short circuit condition occurring, an electromagnetic force between the at least one first limb and the second limb relatively increases a contact pressure force, exerted onto the moving contact connection pin, of a contact compression spring of the switching device, the housing of the switching device including
• bearing surfaces, on side walls of the housing, to arrange the at least one first limb in a stationary manner
• an internal dimension, between the side walls, slightly larger than an external dimension of the supporting plate such that the supporting plate is movable within the housing in a sliding manner between the side walls of the housing, and
• another internal dimension, between the guide surface of the connection piece and a further guide element of a rear housing wall of the housing, being slightly larger than an external dimension of the supporting plate such that the supporting plate is also movable within the housing in a sliding manner between the guide surface and the further guide element of the housing.