Patent ID: 7088207

Claim:
An electrical switching device for a fault-current, overcurrent and short-circuit current protection, the electrical switching device comprising: a current path having a contact point disposed therein; a switching mechanism for opening said contact point; a configuration for detecting the fault-current, an overcurrent and an short-circuit current, said configuration containing two permanent magnets having like poles disposed opposite to one another, and a core permanently connected to one of said permanent magnets and composed of a magnetic material, said core disposed between said like poles of said permanent magnets pointing towards one another and a first of said permanent magnets being fixed and a second of said permanent magnets being guided such that said second permanent magnet can move; and at least one coil at least partially surrounding said permanent magnets, said at least one coil being part of said current path and through said coil a current flow from the fault-current, the overcurrent or the short-circuit current can flow, so that, when the current flow occurs in said at least one coil, a magnetic field changes such that a relative movement of said second permanent magnet takes place, and the relative movement being transmitted directly or through said switching mechanism to said contact point.