Meidensha Corporation

Kabushiki Kaisha Meidensha

Secheron Sa

Takaaki Furuhata

Kosuke Hasegawa

Kenta Yamamura

Keita Ishikawa

Shota Hayashi

Akira Nishijima

Hidemitsu Takebuchi

Yoshihiko Matsui

Claudio Tricarico

Tarek Lamara

Bjorn Fischer

Tetsuya Kanno

Hideki Komatsu

A vacuum interrupter is equipped with a vacuum container and fixed and movable electrodes provided in the vacuum container. The vacuum container is constructed by hermetically respectively joining fixed-side and movable-side end plates to one and the other end portions of an insulating tube. The insulating tube is equipped at its end portion with a projection portion that projects in an axial direction of the insulating tube along an outer periphery of the insulating tube. The insulating tube is equipped at its end portion with an end plate joining portion that projects from a base end portion of the projection portion inwardly in a radial direction of the insulating tube. The end plate joining portion is equipped on its surface with a metallized layer to which the fixed-side or movable-side end plate is joined by brazing.

Vacuum interrupter

It is an electrode material that is used as an electrode contact of a vacuum interrupter and that contains one or more parts by weight of a heat-resistant element and one part by weight of Cr, the remainder being Cu and an unavoidable impurity. A part of Cr powder and the heat-resistant element powder are mixed together, and this mixed powder is sintered such that a peak corresponding to Cr element disappears in X-ray diffraction measurement. A solid solution powder obtained by pulverizing a sintered body of the heat-resistant element and Cr obtained by the sintering is mixed with the remaining Cr powder, and this mixed powder is shaped and then sintered. A sintered body obtained by this sintering is infiltrated with Cu.

Electrode material and method for manufacturing electrode material

It is a method for producing an electrode material containing Cu, Cr and a heat-resistant element. A heat-resistant element powder and a Cr powder are mixed together such that the heat-resistant element is less than the Cr by weight. A resulting mixed powder is baked. A resulting sintered body containing a solid solution of the heat-resistant element and the Cr is pulverized, and a resulting solid solution powder is classified, to have a particle size of 200 &#x3bc;m or less. 10-60 parts by weight of the classified solid solution powder and 90-40 parts by weight of a Cu powder are mixed together, followed by sintering to obtain the electrode material. If a low melting metal powder having a median size of 5-40 &#x3bc;m is mixed with a mixed powder of the solid solution powder and the Cu powder, the deposition resistance property is further improved.

Method for producing electrode material and electrode material

A contact for a vacuum interrupter, includes: 1) a contact plate; and 2) a contact carrier. The contact carrier includes: a first end face which is fitted with the contact plate, and a peripheral face which is formed with a slit portion in such a manner as to form a coil part. The coil part flows a current such that a longitudinal magnetic field is formed in an axial direction of the contact carrier. The first end face fitted with the contact plate is formed with a circumferential slit portion which connects to the slit portion.

Contact for vacuum interrupter, and vacuum interrupter using same

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Shizuoka, Japan

Takaaki Furuhata