| US 7,541,901 B2 | ||
| Circuit breaker | ||
| Masaaki Nakano, Saitama (Japan); Syuichi Sugiyama, Chiba (Japan); and Masaru Isozaki, Chiba (Japan) | ||
| Assigned to Fuji Electric FA Components & Systems Co., Ltd., Tokyo (Japan) | ||
| Filed on Mar. 02, 2007, as Appl. No. 11/712,899. | ||
| Claims priority of application No. 2006-067518 (JP), filed on Mar. 13, 2006; and application No. 2006-318028 (JP), filed on Nov. 27, 2006. | ||
| Prior Publication US 2007/0210885 A1, Sep. 13, 2007 | ||
| Int. Cl. H01H 9/30 (2006.01) | ||
| U.S. Cl. 335—201 | 3 Claims |
| 3. A circuit beaker for a double-break mechanism, comprising:
a current interrupting section having a contact mechanism, said contact mechanism comprising first and second fixed contactors
arranged in parallel and having fixed contacts, and a bridging movable contactor having an arm with movable contacts opposing
the fixed contacts, and
partition walls formed of organic polymer material and provided to stand along a path of switching movement of the movable
contactor, said partition walls sandwiching each pair of the fixed contact and the movable contact to form a narrow arc extinguishing
space between the partition walls,
wherein said partition walls comprise outer partition walls formed outside the fixed contacts of the first and second fixed
contactors and the movable contacts, and an inner partition wall situated between two pairs of the fixed contacts and the
movable contacts, and
a distance between the pair of fixed and movable contacts and the outer partition wall is smaller than a distance between
the pair of fixed and movable contacts and the inner partition wall provided.
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