Title:
CIRCUIT BREAKER
Document Type and Number:
Japanese Patent JP3503396
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To facilitate the assembling work by tripping a circuit breaker when the detected voltage becomes the reference voltage or below, releasing the engagement with a crossbar, and moving an actuator to the reset position with a reset lever via the energizing force of a lever spring.
SOLUTION: When the detected voltage is lowered to the reference voltage or below, the electromagnetic force of an electromagnet 21 is decreased, and the attracting force attracting a plunger 22 to an anvil 21b is weakened. The attracting force becomes smaller than the energizing force of a plunger spring 23, and the plunger 22 is dissociated from the anvil 21b. An actuator 25 is interlocking moved in the direction of an arrow K by the energizing force of the plunger spring 23, a trip bar 40 is rotated CCW to the position shown by a solid line from the position shown by a chain line, and the opening/closing mechanism section of a circuit breaker is operated to trip the circuit breaker.
Inventors:
Yoshiaki Kobayashi
Masahiro Fushimi
Toshiyuki Yanabe
Masahiro Fushimi
Toshiyuki Yanabe
Application Number:
JP5175397A
Publication Date:
March 02, 2004
Filing Date:
March 06, 1997
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H01H83/12; H01H71/02; H01H71/24; (IPC1-7): H01H83/12
Domestic Patent References:
| JP8185788A | ||||
| JP49138374U | ||||
| JP5128614Y1 |
Attorney, Agent or Firm:
Kaneo Miyata (1 person outside)