A DC-voltage vehicle electrical system for a motor vehicle, having a
current source and a user. The DC-voltage vehicle electrical system is
preferably developed as a 42V multi-voltage vehicle electrical system. A
device for the cyclical interruption of the current is provided in the
DC-voltage vehicle electrical system, in order to prevent the formation
of arcs during switching and plugging procedures under a load at the
DC-voltage vehicle electrical system or to end rapidly the formation of
arcs, in a simple manner and without expensive constructive or switching
technology measures.