| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a lightning arrester with high insulation reliability even when it is downsized.SOLUTION: A lightning arrester A comprises: a cylindrical insulation vessel 1 inside of which is filled with insulating gas 2; an internal element 3 formed by laminating a plurality of nonlinear resistors housed in the insulation vessel 1; a ground-side fixed electrode 4 which is provided on one end of the insulation vessel 1 and is electrically connected to the internal element 3; and a high voltage-side fixed electrode 5 which is provided on the other end of the insulation vessel 1 and is electrically connected to the internal element 3. At least part of the inner peripheral surface of the insulation vessel 1 is coated with nonlinear resistance coating 7, and the ground-side fixed electrode 4 and the high voltage-side fixed electrode 5 are electrically connected to each other via the nonlinear resistance coating 7. In addition, a portion in the vicinity of the high voltage-side fixed electrode 5 of the insulation vessel 1 may be formed into a shape along an electric line of force from the high voltage-side fixed electrode 5.</p> |
