Arc Extinguishing Assembly Sealing for Higher Breaker Pressure
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Solution Overview
Problem
Conventional circuit breakers face issues with insufficient temporary pressure increase during arc generation, fluid leakage between the circuit breaker and arc extinguishing assembly, and reduced arc extinguishing performance due to gaps, leading to potential damage.
Innovation Solution
An arc extinguishing assembly with a sealing member that includes an exhaust and plate-shaped side portions, coupled with a sealing member to seal gaps and increase pressure, enhancing the arc extinguishing performance by suppressing fluid leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional circuit breaker with simple arc extinguishing structure is used, then the device complexity is low, but the arc extinction reliability is insufficient under high current conditions
Solution Approach 1:
The arc extinguishing assembly is divided into multiple independent arc extinguishing units (first arc extinguishing unit and second arc extinguishing unit), each with its own arc extinguishing chamber and contact structure. This segmentation allows each unit to independently handle arc extinction, improving overall reliability without requiring a single complex structure.
Solution Approach 2:
The first and second arc extinguishing units are nested within the same arc extinguishing assembly, with the second unit positioned adjacent to and integrated with the first unit. This nested arrangement increases arc extinction capability while maintaining a compact overall structure, avoiding excessive complexity.
2Reliability
If the arc extinguishing assembly is designed to handle high current arcs, then the arc extinction capability is improved, but the volume of the circuit breaker increases
Solution Approach 1:
The arc extinguishing units are arranged in a planar configuration within the arc extinguishing chamber, utilizing two-dimensional space arrangement rather than increasing linear dimensions. Multiple arc extinguishing surfaces are positioned adjacent to each other, effectively increasing arc handling capacity without proportionally increasing the overall volume of the circuit breaker.
Solution Approach 2:
The arc extinguishing units utilize thin arc extinguishing chambers and contact structures that provide sufficient arc extinction surface area while maintaining minimal volume. The compact design of each unit allows for efficient space utilization, enabling high current arc extinction capability without excessive increase in circuit breaker volume.
3Reliability
If multiple arc extinguishing units are integrated into a single assembly, then the arc extinction reliability is improved, but the manufacturing complexity increases
Solution Approach 1:
The arc extinguishing assembly is designed as a modular structure with distinct first and second arc extinguishing units that can be manufactured separately and then assembled together. This segmentation allows for simplified manufacturing of individual units while achieving reliable arc extinction through their integrated arrangement.
Solution Approach 2:
The first and second arc extinguishing units are combined into a single integrated arc extinguishing assembly that functions as one cohesive unit. This merging provides reliable arc extinction capability while maintaining manufacturing simplicity through standardized design and assembly procedures.
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
The sealing member effectively seals gaps, increasing temporary pressure and arc extension length, improving arc extinguishing performance and preventing damage to the circuit breaker.
Implementation Method 1
When a circuit breaker breaks a high current, an arc is generated between contact points of the circuit breaker. In order to extinguish the arc, a large amount of arc blast energy is required
Data Source
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AI summary
The present invention relates to an arc extinguishing assembly including a sealing member and a circuit breaker including same. The sealing member is pressed and elastically deformed between coupling surfaces of the arc extinguishing assembly and the circuit breaker, and accordingly, a gap between the coupling surfaces of the arc extinguishing assembly and the circuit breaker is sealed. Accordingly, when an arc is generated, a temporary pressure increase in the circuit breaker increases and the arc can be smoothly extended.