Kabushiki Kaisha Toshiba

Toshiba Energy Systems & Solutions Corporation

Yoshimitsu Niwa

Kenji Watanabe

Junichi Sato

Tsutomu Okutomi

Masayuki Ando

Tsuneyo Seki

Yoshiaki Ohda

Ryuta Hasegawa

Shinya Naoi

Mitsutaka Homma

Hiromichi Somei

Iwao Ohshima

Kumi Uchiyama

Kazuhisa Kanaya

Yuki Sekimori

Naoki Asari

Takashi Ooshima

Wataru Sakaguchi

Nobutaka Kubota

Mian Wang

Tetsuya Hasegawa

Akira Daibo

A vacuum valve according to embodiments of the present disclosure, comprising: an electrode having a first surface which a hollow part is formed on, which electrode spiral electrode slits which slantingly cross an axial direction are formed on outer circumference of, a conductor fixed on a second surface of the electrode, which second surface is opposite side of the first surface, a contact point having a first concavity which opens to the conductor side, which contact point is fixed on the first surface of the electrode, and a connecting plate whose resistivity is lower than one of the contact point, which connecting plate is disposed inside the first concavity, and connecting plate slits which extend inward from circumference as a starting point are formed on, wherein central axes of the connecting plate slits incline in a rotatory direction of the spiral of the electrode slits.

Vacuum valve

An electrode arrangement of a vacuum circuit breaker for making and breaking electrical connection. The electrode arrangement has: a pair of contact members which are adopted for making contact to and release from each other by relatively moving to and from each other along a predetermined direction; a pair of electrically conductive bars being connected to the above pair of contact members, respectively, for providing electric conduction to the contact members; and a magnetizing device with a magnetic body for generating magnetic field parallel to the predetermined direction between the contact members. The magnetic body is composed of an iron alloy comprising 0.02 to 1.5% by weight of carbon and iron. The iron alloy may further contain at least one of manganese and silicon.

Electrode arrangement of vacuum circuit breaker with magnetic member for

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Tokyo, Japan

Yoshimitsu Niwa