Modular Arc Quenching Device with Segmented Splitter Stacks
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Solution Overview
Problem
Existing arc quenching devices for electromechanical protective switching devices are costly to produce and maintain, and they struggle to efficiently quench arcs with varying tripping characteristics, especially in applications with lower short-circuit breaking capacity or rated current.
Innovation Solution
The arc quenching device features a quenching chamber with a predefined number of arc splitters arranged in a stacking direction, utilizing a splitter stack with a smaller number of splitters held apart by an insulating material, allowing for flexible configuration with multiple splitter stacks or individual splitters to accommodate different arc quenching requirements, reducing production and storage costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a predefined number n of quenching plates are arranged in the quenching chamber, then arc quenching performance is improved, but production costs and device complexity increase
Solution Approach 1:
The quenching chamber is segmented into multiple splitter stacks, each containing a predefined number m of splitter plates. This segmentation allows the system to achieve reliable arc quenching through distributed splitting of the arc into multiple partial arcs, while reducing the complexity of managing a single large array of n quenching plates. Each splitter stack independently contributes to arc quenching, enabling modular design and simplified manufacturing.
2Reliability
If the number of quenching plates is increased, then arc quenching effectiveness is improved, but manufacturing and storage costs increase
Solution Approach 1:
The system divides the total quenching function into multiple splitter stacks, each with a manageable number m of splitter plates. This segmentation enables standardized mass production of individual splitter stacks, which can then be assembled in different quantities to meet various arc quenching requirements. The modular approach reduces manufacturing complexity and storage costs compared to producing and storing individual quenching plates in large numbers.
Solution Approach 2:
Each splitter stack is designed as a universal module that can be used in different configurations and positions within the quenching chamber. The splitter stacks can be arranged in series or parallel, and individual stacks can be added or removed based on the specific arc quenching requirements. This universality allows a single design to serve multiple applications, reducing the need for custom-manufactured components and lowering overall manufacturing costs.
3Reliability
If more splitter plates are used, then arc splitting capability is improved, but adaptability to different tripping characteristics is reduced
Solution Approach 1:
The system employs a dynamic configuration where the number and arrangement of splitter stacks can be adjusted based on the specific tripping characteristics and arc quenching requirements. Each splitter stack contains a predefined number m of splitter plates, but the total number of stacks and their positioning can be optimized for different applications. This dynamic adaptability allows the same basic design to effectively handle varying tripping characteristics while maintaining reliable arc splitting capability.
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 configuration enables rapid and reliable arc quenching with reduced manufacturing costs, allowing for adaptable variants of arc quenching devices and electromechanical protective switching devices to meet different switching capacities, while maintaining efficient arc extinguishing performance.
Implementation Method 1
If the arc is driven into the quenching chamber, it splits into several partial arcs when it hits the quenching plates, which then burn in series between the individual quenching plates. The multiple partial arcs that are electrically connected sequentially one behind the other lead to a higher arc voltage overall.
Implementation Method 2
Together with a cooling effect of the quenching plates, which extracts heat from the arc, this leads to the arc being extinguished as it progresses.
Data Source
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AI summary
The arc quenching device (10) according to the invention for an electromechanical protective switching device (1) has a quenching chamber area (11) in which a predefined number (n) of quenching plates (13) can be spaced apart from one another and arranged parallel to one another in a stacking direction (R). Furthermore, the arc quenching device (10) has a quenching plate assembly (12) which is arranged in the quenching chamber area (11) and comprises a predefined number (m) of quenching plates (13) arranged parallel to one another, which are held spaced apart from one another in the stacking direction (R) by means of a holding device (14), wherein the number (m) of quenching plates (13) forming a quenching plate assembly (12) is less than the number (n) of quenching plates (13) that can be arranged in the quenching chamber area (11). In this way, simple and cost-effective variant design is made possible.