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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

Inactive Publication Date: 2006-09-20
FUJI ELECTRIC FA COMPONENTS & SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Therefore, when using an electromagnetic trip device having a conventional structure, it is problematic to use a small, small-capacity electromagnet in the electromagnet unit in order to miniaturize the circuit breaker

Method used

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  • Electromagnetic tripping apparatus in circuit breaker
  • Electromagnetic tripping apparatus in circuit breaker
  • Electromagnetic tripping apparatus in circuit breaker

Examples

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Embodiment Construction

[0023] The following will refer to figure 1 and 2 The examples shown describe embodiments of the invention. exist figure 1 in, with Figure 5 The same parts are denoted by the same reference numerals, and their descriptions are omitted.

[0024] figure 1 The electromagnetic trip unit shown in the example is basically the same as Figure 5 The structure shown is the same, but the trip arm 8a extending downward from the trip bar 8 and facing the side of the operating arm 14a of the electromagnet unit 7 has been changed in shape as described below. also, figure 1 (a) to 1(d) respectively show the Figure 5 Action states corresponding to (a) to 5(d).

[0025] In other words, the arm end of the tripping arm 8a in the example shown in the accompanying drawings faces the operating arm 14a standing upright from the bottom up, and the length of the tripping arm 8a is set to face the longitudinal direction of the operating arm 14a. After the center part (in the Figure 5 I...

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PUM

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H73/36H01H71/10
CPCH01H71/02H01H71/123H01H71/505
Inventor 川岛善明高桥定男大谷健吾
Owner FUJI ELECTRIC FA COMPONENTS & SYST CO LTD
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