Dual-Enclosure Switch-Fuse Module for Low-GWP Insulation
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Solution Overview
Problem
Medium- or high-voltage equipment faces challenges in reducing global warming potential, requiring alternative insulating gases that maintain dielectric properties comparable to SF6 while minimizing floor space and production costs, and ensuring environmental sustainability.
Innovation Solution
A switch-fuse module using two separate enclosures with insulating gases having a global warming potential less than SF6, allowing for cost-effective production and compact design without exceeding traditional unit sizes, while maintaining structural stability and flexibility in gas composition control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If alternative insulating gases are used to reduce global warming potential, then environmental sustainability is improved, but floor space requirement increases
Solution Approach 1:
The housing is divided into two separate enclosures: a first enclosure for the switch disconnector and a second enclosure for the fuse. This segmentation allows independent optimization of each compartment's gas filling and spatial arrangement, enabling compact overall design while using alternative insulating gases with lower global warming potential than SF6
Solution Approach 2:
The patent changes the dielectric medium from SF6 to alternative insulating gases (such as air, nitrogen, or other environmentally friendly gases). By adjusting gas pressure and composition parameters within the enclosures, the design achieves comparable dielectric properties without requiring additional floor space
2Object-affected harmful factors
If alternative insulating gases are used to reduce global warming potential, then environmental sustainability is improved, but production cost increases
Solution Approach 1:
The separate enclosure design allows each compartment to be manufactured and tested independently, simplifying production processes. The first enclosure containing the switch disconnector and the second enclosure containing the fuse can be produced using existing manufacturing lines with minimal modifications, reducing overall production costs despite using alternative gases
3Object-affected harmful factors
If alternative insulating gases are used to reduce global warming potential, then environmental sustainability is improved, but device complexity increases
Solution Approach 1:
While the housing is segmented into two enclosures, this segmentation actually simplifies the overall device complexity by allowing independent treatment of the switch disconnector and fuse components. Each enclosure can be optimized separately for its specific functional requirements, making the device easier to manufacture, assemble, and maintain despite the environmental constraints
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 solution enables environmentally friendly dielectric medium usage, cost-effective manufacturing, and flexible design options, allowing for the maintenance and repair of modular components without additional space requirements, thus addressing environmental concerns and economic efficiency.
Implementation Method 1
a first enclosure (12) including a first insulating gas and a second enclosure (14) including a second insulating gas, at least one switch disconnector (300) arranged within the first enclosure (12), and at least one fuse (200) at least partially surrounded by the second enclosure (14). Each of the first insulating gas and the second insulating gas has a global warming potential less than a global warming potential of SF6
Data Source
AI summary
A switch-fuse module and a ring main unit. The switch-fuse module includes: a housing having therein a first enclosure including a first insulating gas and a second enclosure including a second insulating gas; at least one switch disconnector arranged within the first enclosure; and at least one fuse at least partially surrounded by the second enclosure; wherein each of the first insulating gas and the second insulating gas has a global warming potential less than a global warming potential of SF6, and the first enclosure is different and separate from the second enclosure.