Compact Vacuum Switching System for Medium-Voltage Applications
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing medium-voltage switching systems are voluminous due to the need for long separation distances in gas-insulated configurations to prevent flash-over or leakage, resulting in a large structural height and size.
Innovation Solution
A compact switching system design where the disconnecting switch, grounding switch, and power switch are housed together with a central switch that mechanically activates the vacuum switching chambers, minimizing separation distances to 2-3 mm by using vacuum switching technology, and allowing the power switch to also have a vacuum chamber, reducing the overall construction size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gas-insulated switching systems are used with long separation distances to prevent flash-over, then electrical reliability is improved, but the construction height and volume increase significantly
Solution Approach 1:
The patent changes the medium parameter from gas insulation to vacuum insulation. By using vacuum switching chambers instead of gas-insulated chambers, the separation distance required to prevent flash-over is reduced from decimeters to just 2-3 mm, while maintaining electrical reliability. This parameter change in the insulation medium directly resolves the contradiction between reliability and construction height.
Solution Approach 2:
The patent transitions from vertical stacking of switches (one above another) to a horizontal arrangement where disconnecting switch, grounding switch, and power switch are disposed side-by-side on the same housing. This dimensional reorganization allows compact packaging without requiring the long vertical separation distances that would be needed in gas-insulated configurations.
2Volume of moving object
If multiple switches are disposed vertically one after another, then space utilization is improved, but the required construction height increases due to additive separation distances
Solution Approach 1:
The patent reorganizes the spatial arrangement from vertical stacking to horizontal positioning. All three switches (disconnecting, grounding, and power switches) are disposed side-by-side on the same housing rather than stacked vertically. This dimensional change allows compact packaging in a smaller overall volume while avoiding the additive effect of vertical separation distances.
Solution Approach 2:
The patent merges all three switches into a single integrated housing structure with a common bus bar connection. By combining the disconnecting switch, grounding switch, and power switch into one unified assembly with shared mounting and electrical connections, the overall volume is minimized while maintaining functional independence of each switch.
3Reliability
If disconnecting switch and grounding switch are configured in gas atmosphere, then insulation is provided, but separation distances must be configured long to avoid flash-over
Solution Approach 1:
The patent changes the insulation medium parameter from gas to vacuum. By configuring the disconnecting switch and grounding switch in vacuum switching chambers instead of gas-filled chambers, the separation distance between contacts is reduced to 2-3 mm while maintaining adequate insulation performance and preventing flash-over. This fundamental parameter change in the insulation medium resolves the contradiction between insulation performance and separation distance length.
Solution Approach 2:
The patent uses vacuum as an inert environment替代 gas atmosphere. The vacuum switching chambers provide an inert, non-reactive environment that prevents flash-over and leakage paths without requiring the long separation distances necessary in gas-filled chambers. This inert vacuum environment enables compact switch design while maintaining electrical insulation.
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
This configuration results in a significantly more compact switching system with reduced separation distances, maintaining electrical integrity while minimizing the structural height and size, allowing for efficient and reliable medium-voltage switching operations.
Implementation Method 1
the disconnecting switch, configured as a vacuum switching chamber, the grounding switch, and the power switch or load switch are disposed on a housing (3), in which a central switch (2) is disposed, with which the vacuum switching chambers of disconnecting switch and grounding switch can be mechanically activated
Data Source
AI summary
An electrical switching system, preferably a medium-voltage switching system, has a power switch or load switch, a disconnecting switch, and a grounding switch configured as a vacuum switching chamber. Low separation distance lengths and a more compact construction of a switching system is achieved by means of a housing in which the disconnecting switch, configured as a vacuum switching chamber, the grounding switch, and the power switch or load switch are disposed, and in which a central switch is disposed, with which the vacuum switching chambers of disconnecting switch and grounding switch can be mechanically activated. Electrical connections between connector contacts of power switch or load switch, disconnecting switch, and grounding switch can be produced.