VACUUM VALVE

PROBLEM TO BE SOLVED: To solve the problem that, in a vacuum valve including an arc shield that becomes an intermediate potential, when a rating voltage becomes high, an inter-electrode distance is enlarged, causing the arc shield to become longer necessarily and hard to share.SOLUTION: The vacuum v...

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Bibliographic Details
Main Author ITOTANI TAKAYUKI
Format Patent
LanguageEnglish
Japanese
Published 28.05.2015
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRIC SWITCHES
ELECTRICITY
EMERGENCY PROTECTIVE DEVICES
RELAYS
SELECTORS
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Summary:PROBLEM TO BE SOLVED: To solve the problem that, in a vacuum valve including an arc shield that becomes an intermediate potential, when a rating voltage becomes high, an inter-electrode distance is enlarged, causing the arc shield to become longer necessarily and hard to share.SOLUTION: The vacuum valve includes: a pair of electrodes 5a and 5b which are disposed oppositely to each other so as to be contacted/separated within an insulation container 4 that is retained in vacuum; and a cylindrical arc shield 7 that is disposed within the insulation container and surrounds the pair of electrodes. In the arc shield, two arc shield members 71 and 72 are formed separately in an axial direction, and the other arc shield member 72 can be inserted into the one arc shield member 71 for a predetermined distance in the axial direction. Therefore, a length of the arc shield in the axial direction in the case where the one arc shield member and the other arc shield member are joined, can be selected arbitrarily. 【課題】中間電位となるアークシールドを有する真空バルブは定格電圧が高くなると電極間距離が大きくなるため、アークシールドは必然的に長くなり共用化が困難であった。【解決手段】真空に保持された絶縁容器４の内部に接離可能に対向配置された一対の電極５ａ、５ｂと、前記絶縁容器内に配置されて前記一対の電極の周りを囲繞する筒状のアークシールド７とを備えた真空バルブにおいて、前記アークシールドは、軸方向に２つに分けて形成された一方のアークシールド部材７１に他方のアークシールド部材７２を、前記軸方向に所定距離挿入し得るようにすることで、前記一方のアークシールド部材と他方のアークシールド部材を合体させたときの前記アークシールドの前記軸方向の長さを任意に選べるようにした。【選択図】図１
Bibliography:Application Number: JP20130238399