Patent ID: 7109606

Claim:
An electrical energy supply device, supplying DC current to electrical consumers from at least one electrical network chosen by a selector circuit of the supply device, from a plurality of electrical networks, the supply device comprising: an adapter provided for each electrical network, each of the adapters providing, from the electrical network to which the respective adapter is connected, a respective preset DC voltage for supplying the electrical consumers, wherein the selector circuit includes a switchpoint including diodes with cathodes connected together to a common supply point of the electrical consumers, and anodes respectively connected to the electrical networks through respective adapters, and wherein each of the diodes of the switchpoint includes a make/break switch in parallel to short-circuit its respective diode when its respective diode is traversed by at least a part of the current supplying the electrical consumers, which part is provided by a chosen electrical network supplying the electrical consumers, the chosen electrical network being the electrical network connected to the adapter providing a highest preset DC voltage.