Thermal Switching Device with Deformable Blade for Arc Prevention
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Solution Overview
Problem
Modern electrical energy meters face challenges in quickly and reliably opening and closing the cut-off device to prevent electric arcs and protect against magnetic fraud attempts, which can lead to network damage and safety risks.
Innovation Solution
A thermally controlled switching device with a deformable blade and antagonistic actuators allows for rapid and secure connection and disconnection of electrical terminals, resistant to magnetic interference, using expandable materials within sealed cylinders and temperature control to manage the blade's position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a conventional switching device is used, then the structure is simple, but the opening and closing operation is slow and may be disturbed by magnetic fraud attempts
Solution Approach 1:
The patent replaces conventional magnetic or mechanical actuators with a deformable blade mechanism that uses elastic deformation and thermal expansion principles. The blade deforms under thermal influence to actuate the switching contacts, eliminating the need for complex electromagnetic actuators and providing immunity to magnetic fraud attempts while achieving rapid operation.
Solution Approach 2:
The patent utilizes changes in physical parameters, specifically temperature-induced thermal expansion, to drive the switching action. By heating the deformable blade, it expands and deforms to open or close the contacts, providing a simple yet effective mechanism that is both fast and immune to magnetic interference.
2Reliability
If the cut-off device opens slowly, then electric arcs form and damage the installation, but rapid opening requires complex mechanisms
Solution Approach 1:
The patent replaces complex mechanical switching mechanisms with a thermally-actuated deformable blade system. The blade's elastic deformation under thermal influence provides rapid contact separation, minimizing arc formation and protecting electrical installation without requiring complex mechanical linkages or electromagnetic actuators.
Solution Approach 2:
The switching device utilizes periodic thermal cycling to control the blade's deformation state. By applying periodic heating, the blade alternates between deformed and relaxed states, enabling rapid and reliable opening/closing operations that prevent electric arc damage while maintaining structural simplicity.
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 quick and reliable operation of the cut-off device, preventing electric arcs and protecting the network from fraudulent attempts, ensuring safe and efficient power management.
Implementation Method 1
a deformable blade adapted to assume a stable connection form in which a first end of the deformable blade is arranged to connect the two terminals together and a stable disconnection form in which the first end is arranged to disconnect the two terminals
Implementation Method 2
a first actuator and a second actuator which are thermally controlled and which are arranged to act in an antagonistic manner on a second end of the deformable blade to deform the deformable blade
Data Source
Figure 1
AI summary
A switching device comprising: - a deformable blade (6) adapted to assume a stable connected form and a stable disconnected form; - a first actuator (10a) and a second actuator (10b) which are thermally controlled and arranged to act antagonistically to deform the deformable blade, such that the first actuator is adapted to bring the deformable blade into the stable connected form and the second actuator is adapted to bring the deformable blade into the stable disconnected form. An electric meter comprising such a switching device.