| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a small sized current sensor with high sensitivity with respect to a current sensor that is suitable to use the zero phase current transformer of a ground leakage breaker. <P>SOLUTION: The current sensor is constituted of an annular core 1 of a high magnetic permeability material, a core case 2 containing the annular core, an output voltage detecting a winding wire 3 wound on the core case, a shield plate 4 or a shield case 5, an exterior case 6, a lead wire 3a connected to the winding wire, and an insulative resin 7 filled into the gap of the exterior case; and therein a plate 4a of a material with a high-saturated magnetic flux density is used for the cover, or internal surface, or external surface of the core case. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
