Low-voltage breaker

A low-voltage circuit breaker and wall technology, which is applied to circuit breaker parts, circuits, electrical components, etc., can solve the problem of damage to the service life of the arc extinguishing grid 111, short circuit of the arc extinguishing grid 111, and reduction of the breaking capacity of the circuit breaker, etc. problem, to achieve the effect of increasing air pressure, avoiding short circuit, and improving breaking capacity

Active Publication Date: 2009-09-23
CHANGSHU SWITCHGEAR MFG CO LTD (FORMER CHANGSHU SWITCHGEAR PLANT)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the applicant thinks that the above-mentioned structure still has shortcomings, which can be achieved by image 3 Interpretation of the arc path shown by the schematic arc extinguishing chamber assembly 11, due to the structure of the arc shield 112 and the cooperation between the arc shield 112 and the extension leg 1111, there is a dead angle 21 in the area near the end of the extension leg 1111 , when the arc 2 is generated, the arc 2 stays in the dead angle 21 of the air flo

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] please see Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 12 , 13 ,exist Figure 4 Provided in the housing 3 that assembly relation is identical with prior art by base 31, cover 32 and panel 33 constitutes, because Figure 4 The three-pole double-break point circuit breaker is shown in the figure, so the three circuit breaker arc extinguishing devices 1 are arranged in three corresponding circuit breaker arc extinguisher chambers 311 on the base 31, and the operating mechanism 4 is connected with the circuit breaker arc extinguisher 1 The opening and closing of the drive circuit breaker is installed on the base 31, and the tripping device 5 equal to the number of the circuit breaker 1 is matched with the operating mechanism 4, and the operating mechanism 4 is driven by it. exist Figure 12 in, given Figure 4 The structure of the circuit breaking and arc extinguishing device 1 of the shown three-pole double breakpoint circuit breaker, the circuit brea...

Embodiment 2

[0030] please see Figure 8 , in this embodiment, the arc shield 112 is divided into two from the one overall structure of Embodiment 1, that is, it becomes a pair of arc shields 112 with the same shape and structure, and each arc shield 112 corresponds to the The corresponding elongated legs 1111 of the arc grid sheet 111 are the same as the description of the first embodiment.

Embodiment 3

[0032] please see Figure 9 , Figure 10 and Figure 11 The number of arc extinguishing covers 112 is still a pair, and an embedding flange 1113 is formed on the corresponding two sides of the base 1112 of each arc extinguishing grid 111 of a group of arc extinguishing grids 111, and a pair of support members 1114 are provided. , on each support 1114, open a flat hole that is compatible with the embedding flange 1113 ( Figure 9 and Figure 10 It is shown in , but not marked with reference numerals), obviously, the embedding flange 113 is embedded in the flat hole, so that the bases 1112 of a group of arc extinguishing grids 111 are supported by a pair of supports 1114 . In this embodiment, only the elongated legs 1111 of each arc extinguishing grid 111 are inserted into the arc shield 112 , while the base 1112 is located (protruded) outside the arc shield 112 . All the other are the same as the description to embodiment 1.

[0033] The first wall 1123 can be as Figure ...

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Abstract

The invention discloses a low-voltage breaker, belonging to the technical field of low-voltage breakers. The low-voltage breaker comprises a shell, at least one circuit breaking and arc extinguishing device, an operation mechanism capable of cutting off or closing and a tripping device. The circuit breaking and arc extinguishing device comprises an arc extinguishing chamber component and a contact component. The arc extinguishing chamber component comprises a plurality of arc extinguishing grid plates and an arc isolating cover. Each arc extinguishing grid plate is provided with a basal part and a pair of extending legs extending from one end of the basal part, the arc isolating cover is provided with a pair of first wall bodies, a pair of second wall bodies and a pair of third wall bodies, a plurality of arc extinguishing grid plates form a contact cavity, the contact component corresponds to the contact cavity, and the second wall bodies correspond to the interior of the contact cavity. The invention is characterized in that the arc isolating cover also comprises a pair of inner walls, each inner walls is jointed with one end of each second wall body near the basal part of each arc extinguishing grid plate, the other end of each second wall body is jointed with each third wall body, and each inner walls is provided with grids. The invention prevents ablation of electric arcs to the extending legs, can protect the extending legs, prolongs the service life of the arc extinguishing chamber component, achieves fast arc extinguishing effect, and enhances the breaking capacity.

Description

technical field [0001] The invention belongs to the technical field of low-voltage circuit breakers, and in particular relates to a low-voltage circuit breaker. Background technique [0002] A low-voltage circuit breaker is an electrical device that protects circuits and loads by cutting off short-circuit current or overload current. The low-voltage circuit breaker includes a housing, at least one contact assembly and at least one arc extinguishing chamber assembly that matches the contact assembly. The circuit breaker arc extinguishing device, the operating mechanism that can be opened and closed, and the tripping device used to drive the operating mechanism to act, wherein the rapid arc extinguishing capability of the circuit breaker arc extinguishing device is not only the basic function of the circuit breaker, but also a must Require. The circuit breaking and arc extinguishing device includes the arc extinguishing chamber assembly and the contact assembly. The arc extin...

Claims

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Application Information

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IPC IPC(8): H01H73/18H01H9/34
Inventor 何艳峰王云峰刘洪武管瑞良
Owner CHANGSHU SWITCHGEAR MFG CO LTD (FORMER CHANGSHU SWITCHGEAR PLANT)
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