Patent ID: 7821253

Claim:
A direct current measuring device comprising: at least one first magnetic sensor and at least one second magnetic sensor, said magnetic sensors being sensitive to a magnetic field generated by an electric current flowing in a conductor, a processing unit connected to the magnetic sensors and designed to generate an output signal dependent on the measurement signals supplied by the magnetic sensors and representative of said electric current flowing in the conductor, wherein the processing unit comprises: a first input receiving first measurement signals from said at least one first magnetic sensor integrated in a first profile designed to surround the electric conductor and comprising at least one section made from ferromagnetic material with high magnetic permeability, a second input receiving second measurement signals from said at least one second magnetic sensor arranged on at least one section with low magnetic permeability to form a second profile designed to surround the electric conductor, selection means supplying the output signal dependent on the first measurement signals for weak electric currents, and dependent on the second measurement signals for strong electric currents.