Abstract: An electric power-transmission device having a primary conductor arrangement comprising at least two parallel primary conductors (PL) and at least one secondary winding arrangement that is electromagnetically coupled to the primary conductor arrangement, is mechanically separate from the primary conductor arrangement and can be moved in its longitudinal direction. The primary conductor arrangement and the secondary winding arrangement each comprise flat conductors having a small thickness (dL) of a few millimeters and a large width side (bL). The width sides of the primary conductors are disposed adjacently in one plane, and the secondary winding arrangement has at least one secondary coil (SS) that is embodied as a disk winding whose conductor width sides lie in one plane extends parrallel to the plane of the primary conductor arrangement.