Abstract: A power supply device for supplying power to a consumer disposed on a rail vehicle is being configured for generating a supply voltage of the consumer from a voltage applied to the conductor. Transmission electronics and a bypass conductor connectable in an electrically conductive manner to the consumer via the transmission electronics are provided and the transmission electronics is switched between the bypass conductor and the consumer and the bypass conductor is connected in an electrically conductive manner to the conductor by means of two fastening interfaces, a potential difference being present between the fastening interfaces and the bypass conductor being designed in such a manner that the bypass conductor generates an output voltage and the transmission electronics being designed in such a manner that the transmission electronics generates the supply voltage of the consumer from the output voltage.

Abstract: A power supply device for supplying power to a consumer disposed on a rail vehicle having at least one conductor and the power supply device being configured for generating a supply voltage of the consumer from a voltage applied to the conductor. Transmission electronics and at least one conductor loop connectable in an electrically conductive manner to the consumer via the transmission electronics and having n windings are provided. Transmission electronics is disposed between the conductor loop and the consumer, and the conductor loop disposed about the conductor to generate an outlet voltage, the transmission electronics being designed in such a manner to generate the supply voltage of the consumer from the outlet voltage of the conductor loop. A monitoring system having a power supply device and a method for supplying power to a consumer for monitoring a rail vehicle are also provided.

Abstract: A ground contact and a method for conducting electric currents from a rotor part of a machine to a stationary stator part of the machine, the rotor part having an axis or shaft, the ground contact comprising a holder device connected to the stationary stator part of the machine in an electrically conductive manner and a contact realized as a flexible conductor having a free end disposed on a circumference of the rotor part and an end fastened on the holder device, the conductor being inherently stable such that a contact force can be applied to a contact surface for establishing an electrically conductive sliding contact between a sliding contact surface of the conductor and the circumference of the rotor part. The conductor is bendable such that the free end extends in the direction of a rotational axis of the rotor part when disposing the ground contact on the rotor part.