Title:
TRIP CROSSBAR OF CIRCUIT BREAKER
Document Type and Number:
Japanese Patent JP3794450
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To stabilize a tripping characteristic of the circuit breaker of a type to adjust a tripping current value by moving the trip crossbar in the axial direction.
SOLUTION: This trip crossbar 13 intervening between a latch acceptor and a thermomotive electromagnetic overcurrent trip device is rotationally pivoted astride respective poles. The trip crossbar 13 is composed of a crossbar 15 moved axially by operation of an adjustment dial 20, an operating piece 16 provided with a tapered portion 16a on the side opposed to the trip device, and a nail part 17 latching on the latch acceptor. Here, a gap between the operating piece 16 and a bimetal operating end of the opposed trip device is variably adjusted by the dial operation. A depression 15a is formed in the nail attaching position of the crossbar 15, and the nail part 17 is supported in the position through a supporting pin 21 so as to slide axially. Thereby, the crossbar 15 can be moved axially while the nail part 17 is held in the latching position with the latch acceptor, which prevents unevenness of a tripping characteristic.
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| WO/2002/061785 | ADJUSTING DEVICE FOR A THERMAL TRIP ELEMENT |
| JPS5810277 | [Title of the device] Over-current breaker |
Inventors:
Atsushi Koyama
Naoji Uchida
Naoji Uchida
Application Number:
JP16656898A
Publication Date:
July 05, 2006
Filing Date:
June 15, 1998
Export Citation:
Assignee:
Fuji Electric Equipment Control Co., Ltd.
International Classes:
H01H71/74; H01H73/22; (IPC1-7): H01H71/74; H01H73/22
Domestic Patent References:
| JP9298025A | ||||
| JP57104438U | ||||
| JP3122936A | ||||
| JP3077351U |
Attorney, Agent or Firm:
Masaharu Shinobe