| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a zero-phase current detector which can detect current with a high degree of accuracy, and has no possibility that a high voltage is applied to a device arranged on a ground side, even if the insulation in a resin-molded section between a distribution line conductor and an iron core is broken. <P>SOLUTION: A primary wire 16 is wound around an iron core 13 where a distribution line conductor W penetrates, and the tip of the wire 16 is connected to a primary wire 17 of an insulating cylinder current transformer wound around an insulating cylinder 11 arranged inside an insulator 10. A secondary wire 18 of the insulating cylinder current transformer is arranged inside the insulating cylinder 11, and a signal current is pulled out to the ground side. It is preferred to serially and reversely connect the two primary wires 17 of the insulating cylinder current transformer wound around the two insulating cylinders 11 installed in direction of the distribution line conductor W, arranged in the direction of the distribution line conductor W to make the effect due to other conductors cancel. <P>COPYRIGHT: (C)2004,JPO</p> |
