Electrical Connector Insert With Visual Arc-Life Indicator
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Solution Overview
Problem
Existing electrical connectors lack a reliable and easily understood visual indicator for assessing their remaining life, leading to inaccurate maintenance scheduling and potential downtime due to unpredictable arcing damage.
Innovation Solution
An arc snuffer system with an inner ablative arc-quenching portion and a visible indicator layer that produces distinct smoke upon complete ablation, providing a clear visual signal for the connector's remaining life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If no visual indicator is provided, then the connector structure remains simple, but maintenance scheduling becomes inaccurate and downtime increases
Solution Approach 1:
The patent applies a visual indicator layer that changes appearance (produces visible smoke or color change) when exposed to arc, enabling operators to assess the remaining life of the connector. This resolves the contradiction by adding measurement capability without significantly complicating the overall connector structure.
Solution Approach 2:
The visual indicator layer acts as an intermediary between the arc exposure and the operator's assessment. It translates the internal degradation state (ablation of inner portion) into an observable signal, enabling accurate remaining life assessment while keeping the connector structure relatively simple.
2Duration of action of moving object
If the inner ablative portion is made thicker to extend connector life, then duration of action increases, but the visual indicator response time is delayed
Solution Approach 1:
The visual indicator layer is pre-positioned on the inner ablative portion. When the inner portion ablates during normal operation, the visual indicator is already in place to immediately signal the remaining life status. This eliminates delay in detecting when maintenance is needed, even as the connector's operational life is extended through the thicker ablative layer.
3Measurement precision
If a smoke-producing layer is added to indicate remaining life, then measurement precision improves, but manufacturing complexity increases
Solution Approach 1:
The visual indicator layer uses materials that change their physical or chemical properties (produce smoke or color change) when exposed to arc. This provides clear visual feedback for remaining life assessment. The layer can be applied as a coating or integrated during molding, which adds some manufacturing steps but maintains reasonable ease of manufacture through standard coating or molding processes.
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
Enables precise and safe scheduling of maintenance by offering a reliable visual assessment of the connector's life, reducing downtime and resource inefficiencies.
Implementation Method 1
an inner ablative arc-quenching portion that surrounds an open interior between the open end and the electrically conductive assembly
Implementation Method 2
The layer may include a smoke-producing material that produces smoke in response to exposure to the arc
Data Source
AI summary
A system includes: a separable connector including an electrically insulating housing and an electrically conductive probe and an insert. The insert includes: an electrically insulating body including an open end configured to receive the electrically conductive probe; an electrically conductive assembly inside the electrically insulating body and configured to electrically connect to the electrically conductive probe; and an arc snuffer. The arc snuffer includes: an inner ablative arc-quenching portion that surrounds an open interior between the open end and the electrically conductive assembly, the open interior being configured to receive the electrically conductive probe; and a layer on exterior surface of the inner ablative arc-quenching portion. The layer is configured to produce a visible indicator related to a remaining life of the insert when the layer is exposed to an arc.