| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a current measuring instrument for reducing current measuring errors due to variations of winding densities when Rogowski coils are manufactured and variations of interlinkage cross section areas and improving measuring accuracy although a simple constitution is used. <P>SOLUTION: In the current measuring instrument for measuring measured currents of primary conductors by using outputs of a plurality of the Rogowski coils 5, 6, 7 provided around a plurality of primary conductors 2, 3, 4 disposed in parallel, a common cylinder element 8 is provided and covers a plurality of the Rogowski coils with a circumference 8a comprising a nonmagnetic conductive member and disposed parallel to the primary conductors and currents induced by the currents of the primary conductors are conducted to the cylinder element 8. <P>COPYRIGHT: (C)2003,JPO</p> |
