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Vacuum insulated switching apparatus

A switchgear, vacuum insulation technology, applied to electric switches, vacuum gauges, measuring devices, etc., can solve problems such as complex systems

Inactive Publication Date: 2004-12-15
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that the whole system becomes complicated

Method used

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  • Vacuum insulated switching apparatus
  • Vacuum insulated switching apparatus
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Embodiment Construction

[0027] The preferred embodiment of the present invention is described in detail below, according to the embodiment of the present invention will refer to Figure 1 to Figure 15 Describe in detail.

[0028] A first embodiment of the present invention is described here. attached figure 1 A cross-sectional view of the vacuum tube 1 and the vacuum pressure measuring port 30 is shown, Figure 12 An insulating switchgear constructed by rotatably mounting a movable conductor 21 to a main shaft 20 is shown.

[0029] The vacuum tube is formed by connecting two bushings 3, 4 to the periphery of a grounded metal container 2. A fixed electrode 5 and a movable electrode 6 are arranged so that they contact or separate within the vacuum tube 1 to be opened or closed by the contact or separation of the electrodes. The fixed electrode is fixed on the sleeve 3 and a flexible conductor 8 extending from the movable electrode 6 is connected to the sleeve 4 . In the vacuum tube 1 of the embodi...

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Abstract

In a vacuum bulb composed of a grounded metallic vessel, the reliability in monitoring and measuring the vacuum pressure can be improved by providing a vacuum pressure measuring terminal at a side plane of the vessel to electrically separate the main circuit from the measuring terminal.

Description

[0001] This application is a divisional application of the invention patent application filed by Hitachi, Ltd. on February 26, 1999, with the title of invention "vacuum insulated switchgear" and application number "99102425.7". technical field [0002] The invention relates to a vacuum insulated switchgear with a vacuum pressure measuring device. Background technique [0003] When the vacuum pressure increases above 10 -4 Torr, the switching performance and dielectric strength of the vacuum tube decrease rapidly. The reasons for the change of vacuum pressure are: vacuum leakage caused by rupture, release of gas molecules adsorbed on metals and insulating materials, penetration of atmospheric gases, etc. As the size of the vacuum vessel increases with the increase of the vacuum tube voltage, the release of adsorbed gases and the penetration of atmospheric gases become very serious. Japanese JP-A-9-249076 (1997) discloses a structure of an insulating switchgear, wherein a ci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L21/00H01H33/66H01H33/668
CPCH01H33/668H01H33/66
Inventor 森田步夏井健一谷水彻
Owner HITACHI LTD