Current sensor system

A three-phase current sensor system for measuring three AC electrical current having frequencies in a predefined frequency range, the system comprising:

• a first electrical conductor configured for conducting a first AC electrical current thereby creating a first magnetic field, and a first magnetic sensor device configured for measuring a first magnetic field component or a first magnetic field difference of the first magnetic field;
• a second electrical conductor configured for conducting a second AC electrical current thereby creating a second magnetic field, and a second magnetic sensor device configured for measuring a second magnetic field component or a second magnetic field difference of the second magnetic field;
• a third electrical conductor configured for conducting a third AC electrical current thereby creating a third magnetic field, and a third magnetic sensor device configured for measuring a third magnetic field component or a third magnetic field difference of the third magnetic field;
• wherein the three-phase current sensor system further comprises a first metal plate or a first electrically conductive surface arranged in the vicinity of said first electrical conductor for allowing eddy currents to flow in said first plate or said first surface thereby creating a fourth magnetic field which is superimposed with the first magnetic field;
• the three-phase current sensor system further comprises a second metal plate or a second electrically conductive surface arranged in the vicinity of said second electrical conductor for allowing eddy currents to flow in said second plate or said second surface thereby creating a fifth magnetic field which is superimposed with the second magnetic field;
• the three-phase current sensor system further comprises a third metal plate or a third electrically conductive surface arranged in the vicinity of said third electrical conductor for allowing eddy currents to flow in said third plate or said third surface thereby creating a sixth magnetic field which is superimposed with the third magnetic field;
• the first magnetic sensor device is configured for determining a magnitude of the first AC electrical current as a signal or value proportional to the magnetic field component or the magnetic field gradient measured by the first magnetic sensor device;
• the second magnetic sensor device is configured for determining a magnitude of the second AC electrical current as a signal or value proportional to the magnetic field component or the magnetic field gradient measured by the second magnetic sensor device;
• the third magnetic sensor device is configured for determining a magnitude of the third AC electrical current as a signal or value proportional to the magnetic field component or the magnetic field gradient measured by the third magnetic sensor device.