Title:
CIRCUIT BREAKER
Document Type and Number:
WIPO Patent Application WO/2013/103015
Kind Code:
A1
Abstract:
Provided is a circuit breaker capable of stable operation without change in tripping time before and after tripping, and without considerable modification to the conventional external shape and structure. A thermal tripping device (50) has a bimetal-upper base (52) secured to the distal end of a bimetal (51), a bimetal upper (54) rotatably provided to the bimetal-upper base and secured to a member (57) for adjusting overcurrent characteristics that faces a trip bar (22) via a predetermined gap, and a bimetal-upper spring (56) held to the bimetal-upper base and used for constantly urging the bimetal upper with a load that is equal to or greater than tripping load of an on-off mechanism (20), wherein the bimetal upper is rotated against the bimetal-upper spring by the curvature of the bimetal during overcurrent in the electric circuit, and the trip bar is driven via the member for adjusting the overcurrent characteristics.
Inventors:
MIYOSHI NOBUO (JP)
FUSHIMI MASAHIRO (JP)
FUSHIMI MASAHIRO (JP)
Application Number:
PCT/JP2012/050174
Publication Date:
July 11, 2013
Filing Date:
January 06, 2012
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
MIYOSHI NOBUO (JP)
FUSHIMI MASAHIRO (JP)
MIYOSHI NOBUO (JP)
FUSHIMI MASAHIRO (JP)
International Classes:
H01H73/50; H01H71/40
Foreign References:
| JP2010135306A | 2010-06-17 | |||
| JPH0319236U | 1991-02-26 | |||
| JP2000149756A | 2000-05-30 | |||
| JP2008153072A | 2008-07-03 | |||
| JP2010218765A | 2010-09-30 |
Other References:
See also references of EP 2801995A4
Attorney, Agent or Firm:
OIWA Masuo et al. (JP)
Masuo Oiwa (JP)
Masuo Oiwa (JP)
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Claims: