| 摘要 |
PROBLEM TO BE SOLVED: To provide an insulation spacer, which improves joint strength without losing the degree of vacuum, and its manufacturing method. SOLUTION: A sintered metal ring 18a is fitted around an insulator 12, and the sintered metal ring 18a is shrunk by sintering so as to be pressed and jointed to the insulator 12, so that the insulator 12 forms an insulation spacer 12a. Applying the insulation spacer to a vacuum switching gear improves breaking characteristics of the vacuum switching gear since joint strength is improved without losing the degree of vacuum.
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