Modular Vacuum Switch Assembly for Faster Pole Alignment
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Solution Overview
Problem
Existing load-break switches for medium voltage electric systems have complex arrangements, high production costs, and require time-consuming assembly with frequent calibration due to misalignments and mounting defects.
Innovation Solution
A method for assembling a switching apparatus involving a mounting assembly with a support structure, vacuum interrupter, and motion transmission mechanism, allowing for simplified and accurate installation of components, including a vacuum chamber and lever members, which can be installed as a self-standing module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional assembly methods are used for load-break switches, then functional requirements are met, but production time and costs increase significantly
Solution Approach 1:
The patent divides the switching apparatus into modular assemblies (main contact system, vacuum interrupter, motion transmission mechanism) that can be manufactured and tested independently, then assembled together. This segmentation reduces overall assembly complexity and enables parallel production, significantly improving productivity.
Solution Approach 2:
The patent combines multiple components into integrated assemblies, such as mounting the motion transmission mechanism directly on the vacuum interrupter and integrating the auxiliary contact system with the main contact system. This merging reduces the number of separate assembly operations required, decreasing production time while maintaining functionality.
2Manufacturing precision
If traditional assembly methods are used for load-break switches, then all components are installed, but misalignments and mounting defects require hardworking calibration sessions
Solution Approach 1:
The patent implements preliminary alignment features during component manufacturing, such as precision-machined mounting surfaces, locating pins, and self-aligning mechanisms. These preliminary actions ensure correct positioning before final assembly, eliminating the need for time-consuming calibration sessions and reducing misalignments.
3Reliability
If complex arrangements of electric poles are used, then dielectric insulation and arc-quenching capabilities are ensured, but environmental impact increases due to insulation gases
Solution Approach 1:
The patent employs vacuum as an inert environment within the vacuum interrupter for arc quenching, eliminating the need for SF6 or other high-GWP insulation gases. The vacuum atmosphere provides effective arc extinction while having zero environmental impact, maintaining reliability without harmful emissions.
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 method reduces manufacturing time and costs, enhances structural compactness, and improves reliability by simplifying the assembly process and enabling easier detection of misalignments.
Implementation Method 1
a vacuum interrupter comprising a first arc contact, a second arc contact and a vacuum chamber, in which said first and second arc contacts are at least partially enclosed
Data Source
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AI summary
A method for assembling a switching apparatus for medium voltage electric systems characterized in that it comprises the following steps: - for each electric pole of said switching apparatus, providing a mounting assembly, said mounting assembly comprising: - providing a first semi-finished structure of said switching apparatus, wherein said first semi-finished structure comprises, for each electric pole of said switching apparatus, a first pole terminal and a first fixed contact electrically connected to said first pole terminal; - for each electric pole of said switching apparatus, installing said mounting assembly on said first semi-finished structure.