Arc extinguishing chamber structure of circuit breaker

A technology of arc extinguishing chamber and circuit breaker, which is applied in the direction of circuit breaker components, etc. It can solve the problems that the arc is difficult to achieve segmentation, insufficient to reflect the breaking capacity and electrical life performance of the circuit breaker, and achieve the effect of improving the breaking capacity

Pending Publication Date: 2020-11-06
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

Although this structure increases the number of arc extinguishing grids, because the junction of the two sets of arc extinguishing grids is relatively far away from the opening track of the moving guide rod, the arc generated during the opening process of the moving g

Method used

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  • Arc extinguishing chamber structure of circuit breaker
  • Arc extinguishing chamber structure of circuit breaker
  • Arc extinguishing chamber structure of circuit breaker

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] Example 1:

[0029] A contact mechanism 5 showing the structural system of the circuit breaker; A first arc-extinguishing grid group i4 of the arc-extinguishing chamber structure system is shown. The first arc-extinguishing grid group i4 is composed of several longitudinal arc-extinguishing grids stacked at intervals in the transverse state. A second arc-extinguishing grid group II3, which is also an arc-extinguishing chamber structure system, is shown. The second arc-extinguishing grid group II3 is composed of several transverse arc-extinguishing grids stacked at intervals in the longitudinal state. The first arc-extinguishing grid group I4 is adjacent to one end of the second arc-extinguishing grid group II3 and formed with each other. The relationship between glyphs, the The area at the junction of the "V" shape constitutes the adjacent part 30 (also referred to as the "adjacent part", the same below).

[0030] As one of the technical effects of the technical scheme pr...

Example Embodiment

[0048] Example 2:

[0049] See Figure 2 The end of the first arc striking piece I 213 can be set at the end of the transverse extension section 11 facing the abutment 30 in an inclined state with the longitudinal arc striking grid piece or in a longitudinal parallel state with the longitudinal arc striking grid piece, and the end of the second arc striking piece II 223 can be set at an angle with the transverse arc striking grid piece. It can also be arranged at one end of the longitudinal extension section 12 facing the adjacent part 30 in a state of being transversely parallel to the transverse arc-extinguishing grids, and in this embodiment, the first additional grid I 42, the second additional grid II 43, the first additional grid I 31 and the second additional grid II 32 of the first arc-extinguishing grid group mentioned above in Embodiment 1 are discarded, and the rest are the same as those described in Embodiment 1.

Example Embodiment

[0050] Example 3:

[0051] See Figure 3 The first arc-extinguishing blade end I 213 and the second arc-extinguishing blade end II 223 are placed at the end of the lateral extension section 11 of the bracket 1 facing the adjacent section 30 in a state of being parallel to the longitudinal direction of the longitudinal arc-extinguishing blade, and in this embodiment, the first additional blade I 42, the second additional blade II 43, the first additional blade I 31 and the second arc-extinguishing blade group of the first arc-extinguishing blade group of Embodiment 1 are discarded.

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PUM

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Abstract

An arc extinguishing chamber structure of a circuit breaker belongs to the technical field of low-voltage electric appliances. The circuit breaker comprises a contact mechanism. The arc extinguishingchamber structure comprises: a first arc extinguishing grid sheet group which is composed of a plurality of longitudinal arc extinguishing grid sheets which are stacked at intervals in a transverse state; and a second arc extinguishing grid sheet group, wherein the second arc extinguishing grid sheet group is composed of a plurality of transverse arc extinguishing grid sheets which are stacked atintervals in a longitudinal state, one end of the first arc extinguishing grid sheet group and one end of the second arc extinguishing grid sheet group are adjacent to each other and form a font relation. The area of the junction of the first arc extinguishing grid sheet group and the second arc extinguishing grid sheet group forms an adjacent part, an arc striking device is arranged at the position corresponding to the adjacent part, is used for connecting electric arcs entering the first arc extinguishing grid sheet group and the second arc extinguishing grid sheet group and comprises a first arc striking piece and a second arc striking piece which extend towards the direction of the contact mechanism respectively, and the first arc striking piece and the second arc striking piece are arranged at intervals. The good breaking capacity of the circuit breaker is embodied, manufacturing and assembling are facilitated, the ideal reliability of lengthening the arc for cutting the arc extinguishing grid pieces is guaranteed, and the electrical endurance performance is improved.

Description

technical field [0001] The invention belongs to the technical field of low-voltage electrical appliances, and in particular relates to an arc extinguishing chamber structure of a circuit breaker. Background technique [0002] As known in the industry, a circuit breaker is usually configured in a power supply and distribution network, and the circuit breaker plays a role of limiting or disconnecting a fault current in the power supply and distribution network. For example, when there is a large fault current such as caused by overload or short circuit in the circuit, the metal contacts set as contact pairs (also called contact pairs) in the circuit breaker are separated from each other, and a fault occurs between the two opposite contact pairs. The arc is cut by the arc extinguishing grid set in the structural system of the arc extinguishing chamber in the circuit breaker, so that the arc can be quickly or instantaneously extinguished within the desired time, so as to avoid t...

Claims

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Application Information

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IPC IPC(8): H01H73/18
CPCH01H73/18
Inventor 陈会林谢心意刘洪武
Owner CHANGSHU SWITCHGEAR MFG CO LTD (FORMER CHANGSHU SWITCHGEAR PLANT)
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