Electrical Protection Opening Cause Detection via Integrated Voltage Sensing
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Solution Overview
Problem
Existing electrical protection devices, such as miniature circuit breakers, face challenges in distinguishing between manual openings and openings caused by electrical defects without increasing device size or complexity, as they require additional modules for differentiation.
Innovation Solution
An integrated electrical protection device with a mobile contact, switching controller, and electronic control unit that measures voltages and currents to determine the cause of circuit openings, eliminating the need for additional modules by directly integrating this functionality within the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If an additional module is added to existing protection devices to distinguish the cause of opening, then the ability to distinguish manual opening from fault opening is improved, but the device size increases and installation becomes more complex
Solution Approach 1:
The patent merges the cause-detection functionality directly into the existing protection device by utilizing the moving contact's position information and switch state. The electronic control unit processes voltage signals from the electrical linking element and mechanical linkage element to determine whether opening was manual or fault-induced, eliminating the need for separate additional modules while maintaining the distinction capability.
2Loss of information
If an additional module is added to existing protection devices to distinguish the cause of opening, then the ability to distinguish manual opening from fault opening is improved, but the installation process becomes more complex
Solution Approach 1:
The detection functionality is merged into the existing device structure, using components already present in the protection device (moving contact, switching mechanism, electronic control unit). This integration means no separate module installation is required - the cause-detection capability is built-in and activates automatically with the device's normal operation.
Solution Approach 2:
The device uses its own existing components (moving contact position, switch state, voltage measurements) to automatically determine the cause of opening. The electronic control unit processes signals from integrated elements without requiring external assistance or additional installation steps, making the system self-sufficient for cause detection.
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 compact and easy installation by distinguishing between manual and defect-induced openings without additional modules, facilitating accurate fault detection and reducing device size while maintaining operational efficiency.
Implementation Method 1
an electrical linking element, connecting the moving contact and the electronic control unit, configured so that a first current flows through the electrical linking element to the electronic control unit, a first voltage being representative of the position of the moving contact in the conduction position or in the isolation position
Implementation Method 2
a mechanical linkage element, connected to the switching handle and movable between: a press position, the mechanical linkage element then pressing on the switch and holding it in the pressed position, and a release position, the mechanical linkage element then releasing the switch which tilts into the free position
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present invention relates to an electrical protection device comprising a movable contact (11) connected to the electrical circuit, a switching handle (50), and an electronic control unit. The device (1) further comprises an electrical linkage element (60) connecting the movable contact (11) and the electronic control unit (90), a switch (70), and a mechanical linkage element (80) connected to the switching handle (50). The electronic control unit is configured to measure the first and second voltages, compare them to determine the cause of the electrical circuit opening (either manual opening or fault-induced opening), send a first signal if the cause is manual opening, and send a second and/or third signal if the cause is fault-induced opening.