| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve such problems that, when a plurality of detectors are produced, conventional current transformers for use in current detection and conventional capacitors for use in the voltage detection tend to vary in shape of wires, or the like, thereby causing dispersion in the detection values of respective detectors and that the current transformers and capacitors have factors lowering the detection accuracy of a phase difference between the current and the voltage. <P>SOLUTION: A current/voltage detection printed board includes: a through-hole 401 that penetrates the board; a current detection unit having a coil-shaped wire 10 (corresponding to the current transformer) formed around the periphery of the through-hole 401; and a current detection unit having a substantially semi-ring wire 30 (corresponding to an electrode of the capacitor) formed around the periphery of the through-hole 401. The coil-shaped wire 10 and the substantially semi-ring wire 30 are formed of through-holes and pattern wires so as to reduce the dispersion in detection values, and improve the detection accuracy of the phase difference. <P>COPYRIGHT: (C)2012,JPO&INPIT |
