| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain high accuracy for a measured value for the true value when a current flowing to a circuit is normally small, while keeping the current transformer small-sized and lightweight. SOLUTION: An iron core 38, a secondary coil 37 wound around it, and a primary coil 36 wound plural times around the secondary coil 37 are provided for a 1st and a 3rd phase, and covered and molded into a single body with a molding material. Consequently, the ampere turns on the primary coil 36 increases, and the accuracy of the measured value by the secondary coil 37 is increased almost proportional to the square of it, so that even when the current flowing to the circuit is normally small, the accuracy of the measured value for the true valve can be obtained high.</p> |
