Patent ID: 7436156

Claim:
An arrangement comprising: an electrical voltage source; a first voltage converter circuit with an output and an input, in which the electrical voltage source is coupled to the input of the first voltage converter circuit; a second voltage converter circuit; and switching means which electrically bypass the first voltage converter circuit and thus connect the second voltage converter circuit to the voltage source; wherein the first voltage converter circuit comprises: an input circuit including an electromechanical switching element and an inductance, wherein the electromechanical switching element is formed by an electromagnetic device having a normally-closed contact, the electromagnetic device being included in an exciter circuit of a relay which automatically opens and closes once or several times in dependence on a physical quantity, and an output circuit comprising at least one capacitive element, and wherein the output of the first voltage converter circuit is connected to an input of said second voltage converter circuit; wherein an output of said second voltage converter circuit is adapted to be connected to an electrical load; and wherein the second voltage converter circuit is a semiconductor-based voltage converter circuit.