Gas-Insulated Vacuum Load Break Switch Design
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Solution Overview
Problem
Current gas-insulated vacuum load switches are not environmentally friendly and have large device sizes due to the exposure of live parts, which wastes space and is not compact like sulfur hexafluoride load switches.
Innovation Solution
A gas-insulated vacuum load break switch design with a high-voltage conductive loop, control operating mechanism, and transmission apparatus, featuring a load break switch unit, isolating switch unit, and earthing switch unit, where the isolator assembly forms an isolating gap and reduces distance between voltage sides, and the load break switch driving spindle is an insulator with a silicone sleeve for increased creepage distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If vacuum load break switch uses vacuum as breaking medium, then environmental friendliness is improved, but device size becomes large due to exposed live parts
Solution Approach 1:
The patent introduces a gas-filled enclosure that creates an inert atmospheric environment around the vacuum interrupter and live parts. This gas atmosphere provides additional insulation, allowing the device to maintain compact dimensions while using vacuum as the breaking medium, thus resolving the contradiction between environmental friendliness and device size.
Solution Approach 2:
The patent employs a nested structure where the vacuum interrupter is housed within a gas-filled enclosure, which is in turn mounted on an insulator assembly. This multi-level nesting allows efficient space utilization and maintains compact device size while preserving the environmental benefits of vacuum technology.
2Volume of stationary object
If sulfur hexafluoride is used as insulating medium, then device size becomes compact, but environmental friendliness deteriorates
Solution Approach 1:
The patent uses an inert gas atmosphere within the enclosure to provide insulation comparable to sulfur hexafluoride, but with better environmental properties. This allows the device to maintain compact dimensions without using the harmful SF6 gas, thus resolving the contradiction between compactness and environmental friendliness.
Solution Approach 2:
The patent changes the insulating medium from sulfur hexafluoride gas to a different gas configuration combined with vacuum technology, altering the physical and chemical parameters of the insulation system to achieve both compact size and environmental compatibility.
3Adaptability or versatility
If live parts are completely exposed in air, then vacuum technology can be applied, but insulation reliability must be compromised unless device size is increased
Solution Approach 1:
The patent creates a composite insulation system combining vacuum (high dielectric strength) with gas-filled enclosure and ceramic insulators. This composite approach maintains insulation reliability by leveraging the strengths of multiple materials while allowing vacuum technology to be applied, thus resolving the contradiction between technology application and reliability.
Solution Approach 2:
The gas-filled enclosure acts as an intermediary between the vacuum environment and the external atmosphere, providing an additional insulation layer that maintains reliability while allowing the vacuum interrupter to function effectively.
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 design achieves reliable insulation and compactness, reducing spatial dimensions and costs while being environmentally friendly, similar to sulfur hexafluoride load switches without their environmental drawbacks.
Implementation Method 1
vacuum load break switch with the advantages of reliable insulation and being environmentally friendly
Implementation Method 2
gas-insulated vacuum load break switch
Data Source
AI summary
The present disclosure provides a gas-insulated vacuum load break switch, including a high-voltage conductive loop having three phases independent from each other and of the same design, a control operating mechanism, a support box and a transmission apparatus. Each phase of the high-voltage conductive loop includes a load break switch unit with a vacuum interrupter, an isolating switch unit with an isolator, a plastic housing supporting the load break switch unit and the isolating switch unit, and an earthing switch unit; the control operating mechanism includes an operating mechanism for controlling the load break switch unit, an operating rod for controlling the isolating switch unit, and an operating mechanism for controlling the earthing switch unit.