| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain excellent non-linear resistance characteristics by providing a non-linear resistance film on an insulator supporting a high-voltage circuit instead of a lightning arrester and prescribing a film thickness dimension of this non-linear resistance film, and thereby, to restrict a high-frequency overvoltage while achieving reduction in insulation dimension and reduction in cost.SOLUTION: A non-linear resistance film 14 is applied on a surface of an insulator 19 continuously to a high-voltage conductor and a grounded sealed container. A film thickness dimension of the non-linear resistance film 14 is within 1.5 times a maximum particle diameter of MOV powder 15 of particles formed of a non-linear resistance material. Therefore, the MOV powder 15 is less likely to be joined in the thickness direction of the non-linear resistance film 14, and a shortest length of the conductive path is almost the same as a creepage length of the non-linear resistance film 14. Accordingly, the shortest length of the conductive path can be decided on the basis of the creepage length of the non-linear resistance film 14, and an operation voltage value and a withstanding voltage value of the non-linear resistance film 14 can be easily adjusted.</p> |
