Run-on plate

A technology of arc striker and arc striker, which is applied in the direction of electrical components, electric switches, circuits, etc., can solve the problems of hindering arc movement, poor switch disconnection performance, and low production efficiency, so as to simplify the combination of parts and increase The effect of arc striking magnetic field strength and improving assembly efficiency

Inactive Publication Date: 2013-12-04
浙江大华电气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, since the arc strike plate and the arc strike support of this utility model are arranged facing each other, the current directions of the two at the contact end are roughly opposite, and the distance is very close, so that the self-excited magnetic fields above the arc strike plate basically cancel each other
This makes the self-exciting magnetic field used to guide the arc to the arc extinguishing chamber above the contact point too weak, so that the arc will stagnate under the moving contact, which will cause the arc to move to the arc extinguishing chamber. When the speed is slowed down, the off time of the switch will be extended, reducing the breaking performance of the switch
In addition, since the upper end of the arc strike plate in this patent document is also provided with an extension end extending toward the moving contact, the dire

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example one

[0028] See figure 1 The arc ignition plate disclosed by the present invention includes an arc ignition piece 2, which is arranged obliquely below the movable contact 1, and the lower end of the arc ignition piece 2 is connected to the lower end of the arc extinguishing chamber. The upper end of the arc piece 2 is arranged close to the movable contact 1; and the arc-igniting support plate 3, the upper end of the arc-igniting support plate 3 is connected to the upper end of the arc-igniting piece 2, and the lower end of the arc-igniting support plate 3 It is in contact with the lower end of the bimetallic strip 5; the contact connection between the arc-striking strip 2 and the arc-striking support plate 3 has a transition section in a substantially horizontal direction. The horizontal direction mentioned here is not absolutely horizontal. The transition section here only serves to connect the arc-striking piece 2 and the arc-striking support plate 3, and make t...

Example Embodiment

[0035] Example two

[0036] See figure 2 , On the basis of the first embodiment, the arc-igniting piece 2 is provided with a bending portion 22 directed to the arc-extinguishing chamber on the side close to the arc-extinguishing chamber, and the bending portion 22 and the arc-igniting piece A "U"-shaped opening is formed between the upper surfaces of 2 and the direction of the opening points to the arc extinguishing chamber. In order to further enhance the strength of the arc-igniting magnetic field, two or more bending parts 22 may be provided on both sides of the upper surface of the arc-igniting piece 2. Of course, the bending parts 22 must be combined The specific size of the internal space of the circuit breaker and the installation process are determined. Experiments have shown that the provision of one of the bending parts 22 can meet the requirements of rapid arc ignition.

[0037] In this embodiment, the bending portion 22 is a sheet structure, and the plate surface of ...

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Abstract

The invention discloses a run-on plate which comprises an arc striking sheet, wherein the arc striking sheet is arranged below a moving contact obliquely. The lower end of the arc striking sheet is connected with the lower end of an arc extinguish chamber, and the upper end of the arc striking sheet is arranged close to the moving contact. The upper end of an arc striking supporting plate is connected with the upper end of the arc striking sheet, and the lower end of the arc striking supporting plate makes contact with the lower end of a bimetallic strip. A roughly horizontal transition section is arranged on the connection portion of the arc striking sheet and the arc striking supporting plate, and the transition section separates the top end of the arc striking sheet and the top end of the arc striking supporting plate in the horizontal direction. According to the run-on plate, due to the fact that the transition section is arranged on the connection portion of the arc striking sheet and the upper end of the arc striking supporting plate, the arc striking supporting plate and the top end of the arc striking sheet can be separated with a certain distance; the intensity of a self-excitation magnetic field above the arc striking plate can be enhanced, the arc extinguishing effect is further enhanced, and the on-off performance of a switch is improved; by enabling the middle portion of the arc striking plate to be bent to one side where a wiring board locates and to make contact with the wiring board, conductive connecting components can be saved, and assembling efficiency can be improved.

Description

technical field [0001] The invention relates to the technical field of arc striking for circuit breakers, in particular to an arc striking plate. Background technique [0002] When the moving and static contacts in the circuit breaker are separated due to a fault such as a short circuit in the circuit, an arc will be generated between the moving and static contacts, which delays the opening time of the switch, reduces the breaking performance of the switch, and even causes the circuit breaker to break. The load and circuit breaker components in the battery are severely burned. [0003] In order to make the arc generated when the moving and static contacts separate quickly and smoothly be introduced into the grid arc extinguishing chamber to be extinguished, the traditional method is to set a number of arc strike plates that conduct current in the chamber where the move and static contacts are located. A self-exciting magnetic field is generated around it, and the arc is gui...

Claims

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Application Information

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IPC IPC(8): H01H9/30
Inventor 徐波吴起军胡克炎赵明
Owner 浙江大华电气有限公司
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