| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To easily discharge a pressure inside an insulation cylinder generated when a large current flows to an arrestor while adding prescribed bearing between arrestor elements. <P>SOLUTION: The arrestor is provided with a metal case 6 surrounding the insulation cylinder 1, a grounding electrode 5 and a spring 8, and a sealing member 7 mounted on the opening on the rear end part side of the metal case 6. Also, an annular locking part 63 orthogonal to an axis and extending in a center direction is provided on the opening on the rear end part side of the metal case 6, and the rear end part of the spring 8 is abutted to the surface facing the grounding electrode 5 of the locking part 63. The sealing member 7 is provided with a lid member 71 airtightly mounted on the inner periphery of the locking part 63 and a pressure discharge plate 72 disposed on the side facing the grounding electrode 5 of the lid member 71, and the inner diameter of the spring 8 is made larger than the outer diameter of the pressure discharge plate 72. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
