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

The device has magnetic sensors (4A, 4B) e.g. Hall Effect sensor, sensitive to a magnetic current generated by an electric current in an electric conductor (3), and a processing unit (7) connected to the sensors. The processing unit generates an output signal (S) depending on measured signals (SA, SB) provided by the sensors and representing the electric current. The processing unit has two inputs (11, 12) receiving measured signals of the sensors and a selection unit (13) providing an output signal, which depends on the measured signals, for weak and strong electric currents.