| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a watt-hour meter achieving miniaturization and cost reduction by reducing the installation number of current detectors composed of large components. <P>SOLUTION: A current value of a first distribution line of power supply performed by a plurality of distribution lines is detected by a current detection unit 106 that does not have insulating property, and a current value of the other second distribution line is detected by a current detection unit 105 that has insulating property. A current value of the third distribution line required for measuring power is computed from the current value of the first distribution line and the current value of the second distribution line. <P>COPYRIGHT: (C)2010,JPO&INPIT |
