Title:
真空開閉装置
Document Type and Number:
Japanese Patent JP7471929
Kind Code:
B2
Abstract:
To provide a vacuum switching device in which dielectric breakdown or arc discharge starting from electric field relaxing members is suppressed so as to be capable of reducing damage to the electric field relaxing members.SOLUTION: A vacuum switching device comprises: an insulating container which is made of an insulating material in a cylindrical shape, and which has openings on both ends in a cylinder axial direction; a pair of electrodes which are housed in the insulating container, and whose contacts can be brought into contact with or brought out of contact from each other; sealing metal fittings which are bonded to the openings so as to close the insulating container; and a pair of electric field relaxing members which are made of a material having dielectric breakdown field strength equivalent to that of a material of the contacts, and which relax electric field strength between the insulating container and the contacts. Each of the contacts has a first curved part whose surface is curved at a predetermined radius of curvature. Each of the electric field relaxing members has a second curved part whose surface is curved at a predetermined radius of curvature. The radius of curvature of the surface of the first curved part is smaller than that of the surface of the second curved part.SELECTED DRAWING: Figure 1
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| WO/2003/005394 | ELECTRICAL CUTOFF AND SECTIONING EQUIPMENT COMPRISING A VACUUM BULB |
| JP2018049764 | SWITCH UNIT AND RAILWAY VEHICLE |
| WO/1992/011651 | VACUUM SWITCH POLE |
Inventors:
Tomohiro Tateyama
Naoki Asari
Kota Hamada
Junichi Kondo
Naoki Asari
Kota Hamada
Junichi Kondo
Application Number:
JP2020102111A
Publication Date:
April 22, 2024
Filing Date:
June 12, 2020
Export Citation:
Assignee:
Toshiba Corporation
Toshiba Infrastructure Systems & Solutions Corporation
Toshiba Infrastructure Systems & Solutions Corporation
International Classes:
H01H33/662; H01H33/664
Domestic Patent References:
| JP10302586A | ||||
| JP2011258523A |
Attorney, Agent or Firm:
Suzue International Patent Office
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