DEVICE FOR MEASURING DC CURRENT HAVING LARGE MEASUREMENT SWING, ELECTRONIC TRIP COMPRISING SUCH A MEASUREMENT DEVICE AND CUT-OFF DEVICE HAVING SUCH A TRIP

摘要

DC current measuring device comprising at least one first magnetic sensor and at least one second magnetic sensor, both sensitive to a magnetic field generated by an electric current flowing through a conductor. The measurement device comprises a processing unit connected to the magnetic sensors and intended to generate an output signal dependent on the measurement signals from the magnetic sensors. Said processing unit comprises selection means providing the output signal dependent, for small electric currents, on the first measurement signals of at least one first magnetic sensor, and dependent, for large electric currents, on the second measurement signals of at least one second magnetic sensor.