Miniature breaker and arc-extinguishing device thereof
An arc extinguishing device and circuit breaker technology, applied to circuit breaker parts, circuits, electrical components, etc., can solve problems such as re-ignition and insufficient arc extinguishing performance of circuit breakers, and achieve the effect of improving arc extinguishing performance
Active Publication Date: 2016-05-25
SUZHOU FUTURE ELECTRICAL APP
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- Application Information
AI Technical Summary
Problems solved by technology
However, due to the small creepage distance between the arcs from two adjacent arc channels, electric breakdown may occur and re-ignition may occur, resulting in insufficient arc extinguishing performance of the circuit breaker, especially when the voltage or current of the circuit breaker This is more pronounced when the larger
Method used
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Embodiment Construction
[0034] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.
[0035] figure 1 Shown as a structural schematic diagram of a miniature circuit breaker according to an embodiment of the present invention, figure 2 shown as figure 1 Structural diagram of intermediate arc extinguishing device, moving contact, static contact and arc striking angle; please refer to figure 1 with figure 2 , the circuit breaker includes a moving contact 1 and a static contact 2, the static contact 2 is provided with...
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The invention provides an arc-extinguishing device of a miniature breaker. The miniature breaker comprises two oppositely arranged lateral vertical plates, wherein a plurality of arc chutes which are stacked in parallel are arranged between the two lateral vertical plates; an arc channel is formed between two adjacent arc chutes; the front end of the arc-extinguishing device is open; a backboard covers the rear end of the arc-extinguishing device; an arc outlets which are correspondingly communicated with the arc channels are formed in the backboard; and protruding separate ridges are arranged between upper and lower two adjacent arc outlets on the outer side surface of the backboard. The separate ridges arranged between the upper and lower two adjacent arc outlets on the outer side surface of the backboard of the arc-extinguishing device can increase the creep distance between the adjacent arc outlets, so that short arcs from two adjacent arc outlets are not easily broken through to be reignited, so that the miniature breaker and the arc-extinguishing device thereof can improve the arc extinguishing performance of the breaker.
Description
technical field [0001] The invention relates to a small circuit breaker, in particular to an arc extinguishing device for a small circuit breaker. Background technique [0002] The miniature circuit breaker will generate an arc when the moving and static contacts are separated. In order to extinguish the arc, the miniature circuit breaker generally adopts a grid-type arc extinguishing device. The grid is generally supported by two side vertical plates, and an arc channel is formed between two adjacent arc extinguishing grids. The side arc exits; in this way, a long arc is divided into multiple short arcs, and when the AC current crosses zero, all short arcs are extinguished at the same time. However, due to the small creepage distance between the arcs from two adjacent arc channels, electric breakdown may occur and re-ignition may occur, resulting in insufficient arc extinguishing performance of the circuit breaker, especially when the voltage or current of the circuit brea...
Claims
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Login to View More IPC IPC(8): H01H73/18H01H9/34
CPCH01H9/34H01H73/18
Inventor 徐波郁晓平
Owner SUZHOU FUTURE ELECTRICAL APP