A device for transmitting electrical power from a wall to a wing attached thereto about a hinge axis includes a wall part fastened to the wall. A wing part is fastened to the wing. A primary coil arranged on the wall part comprises an end side, a primary coil winding and a primary coil housing with ferromagnetic or ferrimagnetic properties. The primary coil housing is open on an end side facing the wing part and substantially covers the primary coil winding on an opposite end side. A secondary coil arranged on the wing part comprises a secondary coil winding and a secondary coil housing with ferrimagnetic or ferromagnetic properties. The secondary coil housing is open on an end side facing the wall part and substantially covers the secondary coil winding on an opposite end side. The end sides of the primary coil and the secondary coil face each other.