| 摘要 |
A current measuring method capable of reducing the size of a current sensor while ensuring electric insulation easily and suitable for enhancing reliability by preventing heat generation. A current measuring device comprises a printed board ( 3 ) having a conductor for measurement ( 4 ), and a noncontact current sensor ( 100 ) being mounted on the printed board ( 3 ), wherein the current sensor ( 100 ) is mounted on the surface ( 92 ) of the printed board ( 3 ) opposite to the side provided with the conductor for measurement ( 4 ). Since the current sensor ( 100 ) is mounted on the rear surface ( 92 ), electric insulation between the secondary conductor of the current sensor ( 100 ) and the conductor for measurement ( 4 ) can be ensured relatively easy.
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