VACUUM VALVE AND MANUFACTURING METHOD THEREFOR, AND VACUUM ISOLATOR USING THE SAME

• Main Author: ITOTANI TAKAYUKI
• Format: Patent
• Language: English; Japanese
• Published: 28.12.2016
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SWITCHES; ELECTRICITY; EMERGENCY PROTECTIVE DEVICES; RELAYS; SELECTORS

PROBLEM TO BE SOLVED: To solve the following problem: A conventional vacuum valve having means for improving current cut-off performance with a magnetic field by an electric current running through an electrode adopts matching of a physical relationship between mutual electrodes, depending on visual measurement or external marking, which requires electrode design considering degradation in current cut-off performance for degradation in magnetic strength caused by a positional deviation and a change in distribution, thus causing difficult miniaturization of an electrode and a vacuum valve.SOLUTION: A stationary side part assembly 20 retaining a stationary electrode 2 in a vacuum insulation container 1 and a movable side part assembly 21 retaining a movable electrode 3 in the vacuum insulation container 1 are formed with engaging parts 8a, 9a aligning with specific positions of each electrode, and the engaging parts 8a, 9a of the stationary side and movable side part assemblies identify a circumferential position of the mutual electrodes.SELECTED DRAWING: Figure 3 【課題】電極を流れる電流による磁界で電流遮断性能を向上させる手段を有する従来の真空バルブは、目測または外側の目印を頼りに電極同士の位置関係を合わせることから、位置ズレによる磁界強度低下及び分布の変化に対し、電流遮断性能低下分を加味した電極設計をする必要があり、電極及び真空バルブの小形化が難しかった。【解決手段】固定電極２を真空絶縁容器１内に保持する固定側部分組立品２０及び前記可動電極３を真空絶縁容器１内に保持する可動側部分組立品２１に各電極の特定位置と合致する係合部８ａ，９ａを設け、固定側及び可動側の部分組立品の係合部８ａ，９ａで電極同士の周方向位置を特定する。【選択図】図３