| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a direct current measuring device capable of accurately detecting a direct current component even if an alternating current component is admixed to a measured electric path. SOLUTION: In this detecting device having a supersaturated iron core, a current is let flow in a tertiary coil of a sensor penetrating through a primary conductor by an alternating current exciting power source to excite the iron core to a supersaturated state and a direct current flowing in the primary conductor is calculated from a peak current value flowing in a secondary coil. In this case, a current transformer separated from the sensor described above is penetrated through the primary conductor and an output current component to the secondary coil of the sensor due to an alternating current component flowing in the primary conductor is canceled by an output current component of the current transformer.</p> |
