Electrical Contact Arc-Light Sensing for Wear Estimation
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Solution Overview
Problem
High-voltage electrical contacts suffer from wear and tear due to electric arcs, leading to increased arc duration, reduced cut-off reactivity, and potential damage to the contact chamber or connected devices, posing safety risks and requiring frequent inspections or replacements.
Innovation Solution
An electrical device with a wear detection system that utilizes a brightness sensor to measure the time of propagation of an electric arc during opening, allowing for the estimation of wear by calculating the arc duration and light intensity, and transmitting this information to a calculation unit for further processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If electrical contacts are used for high-voltage switching operations, then electrical power transmission capability is improved, but wear from electric arcs increases and contact durability deteriorates
Solution Approach 1:
The brightness sensor and calculation unit perform preliminary detection of arc duration and intensity before significant wear occurs. By continuously monitoring the electric arc characteristics during switching operations, the system can estimate wear accumulation in real-time and trigger maintenance alerts before the contacts reach critical wear levels, preventing failure and extending service life.
2Productivity
If electrical contacts operate for extended periods, then productivity is improved, but wear accumulation increases and safety risks worsen
Solution Approach 1:
The system establishes a closed-loop feedback mechanism where the brightness sensor continuously monitors arc characteristics, the calculation unit processes this data to estimate wear, and the system provides feedback through maintenance alerts. This feedback loop enables continuous safe operation by tracking wear accumulation in real-time and prompting maintenance before safety thresholds are exceeded, allowing extended operational periods with controlled risk.
3Measurement precision
If wear detection is implemented using brightness sensor and arc duration measurement, then maintenance timing precision is improved, but device complexity increases
Solution Approach 1:
The patent introduces a brightness sensor as an intermediary device that indirectly measures wear by detecting arc characteristics rather than directly measuring contact geometry or material degradation. The sensor converts optical information from the electric arc into electrical signals that the calculation unit can process into wear estimates, providing accurate wear detection without requiring direct contact with the wear surfaces or complex measurement systems.
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 system effectively detects wear in electrical contacts by measuring electric arc duration and intensity, enabling timely maintenance, preventing potential safety hazards, and reducing the risk of irreversible damage to the contact components.
Implementation Method 1
A brightness sensor mounted in the detection chamber, configured to detect light in the detection chamber coming from the arc cutting chamber and passing through the window
Data Source
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AI summary
One aspect of the invention relates to an electrical apparatus comprising a contact chamber (23) housing an electrical contact (3) comprising an open state and a closed state, a detection chamber (21) and a window (20) between the two said chambers, and a wear estimation device (4) of the electrical apparatus comprising a light sensor (41) in the detection chamber (21) for detecting light when an electric arc appears in the breaking chamber (23).The electrical device optionally includes a computing unit (42) configured to receive an opening information corresponding to the passage of the electrical contact (3) from the closed state to the open state, perform a light detection by the light sensor (41), calculate an electric arc detection time by comparing the time of receipt of the opening information and the duration of light detection, and estimate wear of the device when the duration of electric arc detection is greater than a predetermined value.