Title:
VACUUM CIRCUIT BREAKER
Document Type and Number:
Japanese Patent JP3833519
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a vacuum circuit breaker which has both a reignition characteristic and a braking characteristic.
SOLUTION: A contact of the vacuum circuit breaker is formed of a Cu-Cr contact alloy containing an arc-resistant composition consisting of Cr with mean grain size of 0.1-150 μm and a conductive composition consisting of 10-85 wt.% Cu. The Cu matrix in the alloy consists of an acid-soluble Cu composition which is a Cu composition dissolved in an acid solution, and an acid non-soluble Cu composition which is a Cu composition not dissolved in an acid solution, and the quantity of the acid non-soluble Cu composition is 10-1,000 ppm. The reignition characteristic and the braking characteristic are compatibly realized thereby.
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Inventors:
Isao Okutomi
Atsushi Yamamoto
Takashi Kusano
Seki Keisei
Mitsutaka Homma
Yoshiko Minami
Atsushi Yamamoto
Takashi Kusano
Seki Keisei
Mitsutaka Homma
Yoshiko Minami
Application Number:
JP2001340261A
Publication Date:
October 11, 2006
Filing Date:
November 06, 2001
Export Citation:
Assignee:
Shibafu Engineering Co., Ltd.
Toshiba Corporation
Toshiba Corporation
International Classes:
C22C9/00; C22C27/06; H01H33/66; (IPC1-7): C22C9/00; C22C27/06; H01H33/66
Domestic Patent References:
| JP8339742A |
Attorney, Agent or Firm:
Hajime Yamashita
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