Solid Insulated Disconnection Switch Size Reduction
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Solution Overview
Problem
Conventional disconnection switches in power-transmission sites are limited in size reduction due to the use of insulating gases like SF6, which also require frequent maintenance and have environmental concerns, hindering miniaturization and cost-effectiveness.
Innovation Solution
The use of insulating solid materials instead of gases, with a base frame, stator, mover, and power transfer assembly made of solid materials, incorporating screw threads and spacers to reduce size while maintaining insulation, and employing a driving assembly to rotate the shaft for connection and disconnection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of stationary object
If insulating gas (SF6) is used in the container, then insulation between main circuits is maintained, but the size of the disconnection switch cannot be reduced and maintenance is required
Solution Approach 1:
The patent changes the physical state of the insulating material from gas to solid. The container is filled with solid insulating material instead of SF6 gas, which fundamentally alters the insulation mechanism. This parameter change enables size reduction of the disconnection switch while eliminating the need for gas maintenance, as solid materials do not require pressure monitoring or refilling like gaseous insulators
Solution Approach 2:
The patent employs composite material structure by combining solid insulating material with the metal container and internal components. The solid insulating material serves multiple functions: electrical insulation, mechanical support, and space-filling to maintain structural integrity. This composite approach allows for compact design while maintaining reliable insulation without the drawbacks of pure gas-filled designs
2Volume of stationary object
If insulating gas is used, then insulation is effective, but the device size is large and miniaturization is hindered
Solution Approach 1:
The transition from gaseous to solid insulating material fundamentally changes the spatial requirements of the device. Solid materials have fixed volume and can be precisely shaped to fit compact configurations, enabling miniaturization of the disconnection switch while maintaining effective insulation between circuits
3Reliability
If SF6 gas is used for insulation, then insulative effect is enhanced, but environmental harm increases and maintenance is required
Solution Approach 1:
The patent replaces SF6 gas with solid insulating material, changing the insulator from a gaseous to a solid state. This eliminates the environmental problems associated with SF6 gas emissions while maintaining effective insulation. Solid materials do not leak or require refilling, thus eliminating both environmental harm and maintenance requirements
Solution Approach 2:
The solid insulating material used in the container is typically inexpensive and does not require maintenance throughout the operational life of the device. Unlike SF6 gas which may need monitoring and replenishment, the solid insulator remains stable and effective without intervention, representing a disposable-like approach where the insulating component lasts the lifetime of the equipment without maintenance
Data Source
AI summary
Provided is a solid insulated disconnection switch including a base frame to which outside electrical equipment is electrically connected, a driving assembly generating rotating power, a shaft of which an outside surface has a screw thread and which is rotated by the rotating power generated by the driving assembly, a stator having a fixed contact point which is electrically connected to a main bus, a mover which is electrically connected to the external connection outlet of the base frame and moves back and forth in a straight line between the fixed contact point of the stator and a position which is separately disconnected from the fixed contact point of the stator by rotating the shaft, a spacer which is provided between the base frame and the stator, and a power transfer assembly which is provided between the driving assembly and the shaft to transfer the rotating power generated from the driving assembly to the shaft. The present invention makes it possible to reduce a size of the disconnection switch by using insulating solid material barriers between components of the disconnection switch instead of the insulating gas.