CURRENT MEASUREMENT DEVICE AND METHOD USING A ROGOWSKI TYPE CURRENT TRANSDUCER

摘要

A current measurement device (1) for measuring a current through a primary conductor (2) is provided. The current measurement device comprises a current transducer (10) of the Rogowski type, the current transducer comprising a conductor winding (12) connected to a pair of transducer terminals (14) and adapted to induce there between a measurement voltage indicative of a current through the primary conductor (2); a pair of calibration terminals (24) adapted for providing a calibration current to a calibration current path (22) conforming to the primary conductor (2), so that the calibration current induces a calibration response voltage component between the pair of transducer terminals (14); and a control circuit (30). The control circuit (30) comprises a calibration current generator (34) for generating the calibration current and connected to the pair of calibration terminals (24) for providing the calibration current via the pair of calibration terminals (24) to the calibration current path (22), and a voltage analyzer (32) connected to the pair of transducer terminals (14) for receiving the calibration response voltage component induced between the pair of transducer terminals (14).