CIRCUIT BREAKER - MITSUBISHI ELECTRIC CORP

Title:

CIRCUIT BREAKER

Document Type and Number:

WIPO Patent Application WO/2019/038946

Kind Code:

A1

Abstract:

A circuit breaker comprises a make-break contact for making and breaking an electrical circuit, an open-contact spring, a toggle mechanism, and an electromagnetic operation mechanism. The open-contact spring biases the make-break contact in the opening direction. When the make-break contact shifts from the open state to the closed state, a biasing force that biases the make-break contact in the opening direction increases. The toggle mechanism shifts the make-break contact from the open state to the closed state. The electromagnetic operation mechanism includes: a moving core (63) moving against the biasing force to thereby cause the toggle mechanism to shift the make-break contact from the open state to the closed state; and a fixed core (61) that has a first attraction surface (61a) for attracting the moving core (63) with an inter-surface distance (A) between the first attraction surface (61a) and the moving core (63) that is shorter than a moving distance (B) of the moving core (63).

Inventors:

DEGUCHI TOMOYA (JP)
SAGARA YUTA (JP)
IMAEDA RYUNOSUKE (JP)
KONDO KEISHU (JP)
KOMOTO SHIGEKI (JP)
MORI MITSUGI (JP)
MASUDA SHINICHI (JP)
IWASHITA HISASHI (JP)
UCHINO SOSUKE (JP)

Application Number:

PCT/JP2018/001286

Publication Date:

February 28, 2019

Filing Date:

January 17, 2018

Export Citation:

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Assignee:

MITSUBISHI ELECTRIC CORP (JP)

International Classes:

H01H33/42; H01F7/16; H01H31/02; H01H33/38; H01H33/666

Foreign References:

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JPS6130942U	1986-02-25
JP2015162402A	2015-09-07
JPS278041Y1
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JPH0689808A	1994-03-29
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