Electromagnetic tripping apparatus in circuit breaker

An electromagnetic tripping and circuit breaker technology, applied in electromagnetic release switches, emergency protection devices, circuits, etc., to achieve the effect of reliable tripping action
CN1276453CInactive Publication Date: 2006-09-20FUJI ELECTRIC FA COMPONENTS & SYST CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
FUJI ELECTRIC FA COMPONENTS & SYST CO LTD
Publication Date
2006-09-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention provides an electromagnetic tripping device, this electromagnetic trip device is used for tripping a circuit breaker by detecting an overcurrent in the main circuit and is so structured that an operation arm (14a) formed on the armature (14) of an electromagnet unit (7) is faces a trip arm (8a) of the trip crossbar (8), the operation arm presses the trip arm of the trip crossbar in the attracting operation of the electromagnet, and thus the breaker is tripped by releasing a latch receiver (9). By changing the force application point between the operation arm and the trip arm from a point P1 to a point P2 in line with the change of an air gap between the armature and the electromagnet in the attracting operation of the electromagnet, the load weight applied to the armature is kept low in the first half causing small attraction, and the force application point is moved to the point P2 in the second half increasing the attraction of the electromagnet so that the trip crossbar is driven to a release position.
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Description

technical field

[0001] The invention relates to an electromagnetic tripping device in a circuit breaker, which can be used in automatic circuit breakers, earth leakage circuit breakers and the like. Background technique

[0002] First, using the above-mentioned automatic circuit breaker as an example, the structure of the circuit breaker related to the subject matter of the embodiment of the present invention is as follows image 3 shown. In this figure, reference numeral 1 represents the circuit breaker housing, reference numeral 2 represents the power terminal, reference numeral 3 represents the fixed contact, reference numeral 4 represents the movable contact, reference numeral 5 represents the contact opening / closing mechanism, and reference numeral 6 represents the opening / closing mechanism. The operating handle, the symbol 7 represents the electromagnet unit of the overcurrent tripping device, the symbol 8 represents the trip bar connected with the electromagnet unit 7...

Claims

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