Arc Chamber Protrusions Prevent Arc Reignition
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Solution Overview
Problem
Conventional circuit interrupters often fail to effectively quench and prevent the reignition of arcs generated during the interruption of current carrying paths, as the arc exhaust may re-ignite after initial quenching.
Innovation Solution
A circuit interrupting device featuring an arc chamber assembly with laterally extending protrusions and a rib structure that redirects and separates the arc, elongating its path to inhibit reignition, utilizing a base with an internal cavity and splitter plates to manage the arc exhaust and maintain separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional circuit interrupters are used to interrupt current carrying paths, then the circuit interruption function is achieved, but the arc exhaust may re-ignite after initial quenching
Solution Approach 1:
The arc chamber is segmented into multiple sections using splitter plates with protrusions, dividing the arc into separate paths. This segmentation prevents the arc exhaust from re-igniting by physically separating and redirecting the arc plasma through multiple compartments, ensuring reliable circuit interruption without reignition
Solution Approach 2:
The protrusions on the splitter plates extend laterally into the arc chamber, creating three-dimensional flow paths that redirect the arc exhaust. This dimensional addition forces the arc to travel through a complex path rather than a straight line, effectively quenching the arc and preventing reignition at the contacts
2Reliability
If the arc path is elongated to prevent reignition, then arc quenching effectiveness is improved, but the device complexity increases
Solution Approach 1:
The arc chamber structure is segmented using splitter plates with protrusions that create multiple compartments. This segmentation elongates the arc path and prevents reignition while maintaining a modular, manageable structure that does not excessively increase device complexity
Solution Approach 2:
The protrusions are strategically positioned on the splitter plates at specific locations within the arc chamber to locally redirect the arc flow. This localized modification achieves effective arc quenching without requiring complete structural redesign of the entire arc chamber, thus limiting the increase in device complexity
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 solution effectively quenches the arc and prevents its reignition by redirecting and separating the arc exhaust, ensuring it does not re-ignite as it exits the device, enhancing the reliability of circuit interruption.
Implementation Method 1
a technique for quenching an arc and preventing reignition of an arc that results from interruption of a current carrying path
Data Source
AI summary
A circuit interrupting device is provided. In some configurations, the circuit interrupting device includes a base and an arc chamber assembly received within the base. The arc chamber assembly includes an arc chamber framework and a plurality of splitter plates received within the arc chamber framework. The arc chamber framework includes a first plurality of protrusions and a second plurality of protrusions that laterally extend in a direction toward one another. Adjacent pairs of the first plurality of protrusions and the second plurality of protrusions are arranged on opposing sides of each of the plurality of splitter plates.