| 摘要 |
<p>The invention relates to a device for measuring a current flowing in an electrical conductor (1), said device comprising a magnetic circuit (2) for coupling to the electrical conductor and having an air gap (20), wherein a magnetic field sensitive component (5) for measuring the magnetic field generated by the electrical conductor is disposed in the air gap of the magnetic circuit. At least one control core (3a, 3b) having a control winding (4a, 4b) for magnetically saturating the control core to control the effective length of the air gap is disposed in the air gap of the magnetic circuit, wherein the magnetic circuit, the magnetic field sensitive component and/or the control core are enclosed, at least in part, by a magnetic shield (8, 82, 84, 86, 88).</p> |
