| 摘要 |
<p>PURPOSE:To correctly detect a current without directly touching a current circuit of a discharge apparatus or the like, without influencing the current circuit and moreover with removing influences by noises. CONSTITUTION:An annular coil 1 formed of a detection winding 4 wound around an annular magnetic core 2 is accommodated in a non-magnetic shield case 20 having a through-hole 24. The through-hole 24 is positioned at the side of an inner periphery of the annular coil 1. A noise filter connected to the annular coil 1 is accommodated in tone shield case 20. On the other hand, the shield case 20 is accommodated in an outer case 40 having a through-hole 44 through which line a to be detected passes. The through-hole 44 is positioned at the side of an inner periphery of the through-hole 24 of the shield case. Accordingly, noises are removed by the non-magnetic shield case 20 and the noise filter.</p> |
