Arc Baffle With Offset Venting Holes For Ionized Gas Dissipation
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Solution Overview
Problem
Existing arc chute assemblies in electrical switching apparatus face challenges in effectively controlling and dissipating ionized gases generated during arcing, which can lead to excessive heat and further arcing, harming electrical components.
Innovation Solution
The implementation of arc baffles with offset venting holes and a filter assembly, comprising identical baffle members and wire mesh filters, induces turbulent flow and cooling, effectively directing and dissipating ionized gases, while retaining arcs within the arc plates to prevent re-establishment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If ionized gases are vented directly without control structures, then the venting process is simple, but excessive heat and additional arcing occur causing harm to electrical components
Solution Approach 1:
The venting structure is segmented into multiple baffle members with offset venting holes, creating a series of staged barriers that progressively control and cool ionized gases as they pass through each segment, reducing heat and arcing effects
Solution Approach 2:
Baffle members serve as intermediary structures between the ionized gases and the external environment, providing a controlled path that allows gradual dissipation of harmful energy while protecting electrical components from direct exposure
2Reliability
If arc plates are used to break-up arcs, then arc extinction is achieved, but ionized gases are not effectively controlled or dissipated
Solution Approach 1:
The invention merges the arc extinction function of arc plates with the ionized gas control function of baffle members into a single integrated assembly, allowing both arc breakup and controlled dissipation of ionized gases to occur simultaneously through the same structural arrangement
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enhances the controlled venting and dissipation of ionized gases, reducing the risk of electrical faults and maintaining arc stability, thereby improving the reliability and safety of electrical switching apparatus.
Implementation Method 1
The offset venting holes are structured to induce turbulent flow of the ionized gases passing through the arc chute assembly
Implementation Method 2
the arc being magnetically drawn toward and between the arc plates
Data Source
Figure 1~2
Figure 3~4B
Figure 5
AI summary
An arc baffle (200,200') for an arc chute assembly (50) of a circuit breaker (2) includes a first baffle member (202) disposed at or about the second end (52) of the arc chute assembly (50) and including a plurality of first venting holes (204), a second baffle member (206) including a plurality of second venting holes (208) and being coupled to and disposed opposite from the first baffle member (202), and a filter assembly (250,250') disposed at or about the second baffle member (206) and including a number of filter elements (252,254,256; 252',254',256'). The first and second venting holes (204,208) of the first and second baffle members (202,206) are offset to induce turbulent flow ( 18) of ionized gases ( 16) being discharged from the arc chute assembly (50). The filter elements (252,254,256; 252',254',256') of the filter assembly (250,250') filter the turbulent flow (18). An arc chute assembly (50) and an electrical switching apparatus (2) are also disclosed.