| 摘要 |
PROBLEM TO BE SOLVED: To provide an arrestor with a gap that can provide a stable lightening function same as the conventional arrestor without damaging the peripheral equipment even when a zinc oxide element is destroyed. SOLUTION: An electrode block 5 is fixed by a central insulating rod 3 on the upper end face of a zinc oxide element 1 of which the outer circumference is protected by a heat contraction tube 4. The whole part is integrated by arranging a gap spacer 14 having upper and lower discharge electrodes 12, 13 at their inside on the upper end surface of the electrode block 5, arranging a cap 16 thereon, and making the lower end part 19 of the cap engage with the electrode block 5. There are variety of cap 16 structure and engagement method to the electrode block 5. COPYRIGHT: (C)2004,JPO&NCIPI
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