Error recognition for power ring

A power ring device that includes: a ring conductor; a plurality of controllers, each controller being connected to the ring conductor and includes a first control unit; a plurality of paired pick ups, wherein each pair connects either an electrical consumer device or an electrical power supply to the ring conductor and to one of the plurality of controllers, wherein a first pair of pick ups of a first controller is connected to a first power supply; and a plurality of current sensor signal lines connecting each control unit to form a data connection; wherein each controller has a right and left side, a right sided and left sided switch elements; and a right sided and left sided current sensors connected so that a first current value measured by the left sided current sensor of the first controller is transmitted as data to the first control unit of a second controller.