Folded Insulating Sheets for Complex Bus Isolation
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Solution Overview
Problem
Electrical systems, such as Motor Control Centers, face challenges in providing adequate electrical short-circuit protection and insulation within limited access and dimension constraints, particularly for complex bus geometries.
Innovation Solution
The use of substantially flat, electrically insulating sheets with fold lines that can be folded over power conductors in multiple directions to provide effective insulation, eliminating the need for redesigning existing components and allowing for easy installation and customization of insulation patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional insulation methods (epoxy molding, shrink tubing) are used to provide adequate electrical short-circuit protection, then insulation reliability is improved, but device complexity and manufacturing time increase
Solution Approach 1:
The patent employs disposable insulating sheets made from inexpensive materials like polypropylene or polyester instead of expensive, complex insulation methods. These sheets are pre-cut with fold lines and applied directly to conductors, providing reliable electrical isolation without requiring epoxy molding, shrink tubing, or other complex processes. The sheets can be easily replaced if needed, embodying the disposable concept while maintaining protection reliability.
Solution Approach 2:
The insulating sheet is divided into multiple segments or sections with pre-formed fold lines that allow it to be folded around complex bus geometries. This segmentation enables the single sheet to adapt to various conductor configurations (straight, bent, T-junctions, etc.) without requiring multiple separate insulation components or complex assembly procedures, thus reducing device complexity while maintaining protection reliability.
2Reliability
If complex bus geometries are insulated using traditional methods, then electrical isolation is improved, but manufacturing time and cost increase
Solution Approach 1:
The insulating sheets are pre-cut with fold lines and pre-shaped during manufacturing to match common bus geometries. This preliminary action allows the sheets to be applied directly to conductors in a simple wrapping and folding process, eliminating time-consuming steps like epoxy application and curing, shrink tubing heating, or custom fabrication for each geometry type, thus significantly improving manufacturing speed while maintaining electrical isolation reliability.
Solution Approach 2:
The patent changes the physical state and form of the insulation material from rigid (epoxy) or elastic (shrink tubing) to flexible planar sheets that can be easily manipulated. The sheets can be folded at predetermined lines to adapt to different geometries, and their flexibility allows for quick installation. This parameter change in material form and installation method dramatically reduces manufacturing time while ensuring reliable electrical isolation for complex bus configurations.
3Reliability
If existing electrical system components are redesigned to accommodate insulation requirements, then electrical safety is improved, but adaptability of existing systems deteriorates
Solution Approach 1:
The patent extracts the insulation function from the existing electrical system components themselves and applies it as a separate, add-on element. Instead of redesigning bus supports, enclosures, or other components to incorporate insulation, the solution uses standalone insulating sheets that are applied to the conductors. This extraction approach maintains full compatibility with existing systems while improving electrical safety, as the sheets can be added without modifying any existing components.
Solution Approach 2:
The insulating sheet acts as an intermediary element between conductors and their surroundings, providing electrical isolation without requiring changes to the existing electrical system architecture. The sheets can be applied to various conductor types and configurations, serving as a universal mediator that enables electrical safety improvements while maintaining adaptability to diverse existing systems. Clips or fasteners may also serve as intermediaries to secure the sheets without modifying the underlying system.
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 solution effectively isolates power conductors, reducing the risk of 'arc flash' and other hazards, while being cost-effective and faster to implement than traditional methods like epoxy molding or shrink tubing, and can be easily integrated into existing electrical systems.
Implementation Method 1
The sheet may have a dielectric strength per mil effective to isolate power conductors based on maximum charge and proximity of the power conductors
Data Source
AI summary
An improved electrical system may be provided by electrically isolating complex bus geometries by using one or more substantially flat and electrically insulating sheets. The sheet may have one or more fold lines which allow the sheet to fold in multiple directions and ways over varying configurations of power conductors. The sheet may fit within the constraints of preconfigured electrical system components without the need for redesigning such components. The sheet may have a dielectric strength per mil effective to isolate power conductors based on maximum charge and proximity of the power conductors.