VACUUM VALVE FOR VACUUM SWITCH GEAR

Japanese Patent JP2015035288

A

PROBLEM TO BE SOLVED: To provide a vacuum valve for a vacuum switch gear capable of preventing warpage of an electrode due to contact pressure during inputting in order to increase a breaking capacity without increasing an outer shape of the electrode, and reducing warpage of the electrode due to a difference of a thermal deformation amount during jointing.SOLUTION: The valve comprises a stationary electrode and a movable electrode opposed to each other in a vacuum vessel. The electrodes comprise a plate-like contact electrode brought into a contact and non-contact state to the opposite electrode side, a coil electrode for generating a vertical magnetic field, and an electrode rod and a reinforcing plate mounted to a center part of the contact electrode and a ring part of the coil electrode. The contact electrode includes a first region of a portion at which the reinforcing plate is mounted, and a second region that is the other portion. The contact electrode has a vertical cross sectional area (thickness) of the contact electrode formed larger as it approaches to an outer peripheral end of the contact electrode in the second region from a boundary portion of the first region and the second region.

YAMAZAKI MIKI
OKANO TAKUYA
OKADA NAOYA
SAWADA MASASHI
SUGAI DAISUKE

JP2013164676A

February 19, 2015

August 08, 2013

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HITACHI LTD

H01H33/664

JPS5727643U	1982-02-13
JPS5958725A	1984-04-04
JPS57147536U	1982-09-16
JP2006140073A	2006-06-01
JP2010118293A	2010-05-27
JPS5745741U	1982-03-13

Manabu Inoue
Yuji Toda
Shigemi Iwasaki

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