| 摘要 |
<p>PURPOSE:To provide an optical CT simplified in structure and excellent in durability. CONSTITUTION:An optical CT has a coil part 4 for generating an induction current by the current carried to a conductor L. This coil part 4 forms a coil case 30 divided into two upper and lower cases. An coil iron core 31 is received in each case, and the outer circumference is covered with a moisture resisting layer 48 never permeating moisture, and a water resisting mold layer 49 is charged in the gap between the moisture resisting layer 48 and the case. Thus, the moisture causing freezing crack is never stayed in the case, and the corrosion of the coil iron core 31 is prevented.</p> |
