| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a current measuring device accurately measuring current values in two-system distribution lines, while it occupies a small installation space. <P>SOLUTION: When a current i1 flows in a measuring conductor 16 through terminals 14, 15 of the first current sensor 13, a magnetic field H1 on an XZ-plane is generated, and a magnetometric sensor 17 having a magnetic field sensing direction S1 toward the X-axis direction senses the magnetic field H1, to thereby measure a current value. In this case, a magnetometric sensor 27 of the second current sensor 23 has a magnetic field sensing direction S2 toward the Y-axis direction, to thereby be free from being affected by the magnetic field H1 on the XZ-plane. When a current i2 flows in a measuring conductor 26 through terminals 24, 25 of the second current sensor 23, a magnetic field H2 on an YZ-plane is generated, and the magnetometric sensor 27 having the magnetic field sensing direction S2 toward the Y-axis direction senses the magnetic field H2, to thereby measure a current value. In this case, the magnetometric sensor 17 of the first current sensor 13 has the magnetic field sensing direction S1 toward the X-axis direction, to thereby be free from being affected by the magnetic field H2 on the YZ-plane. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
