Panelboard Bus Support for Universal Bus Accommodation
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Solution Overview
Problem
Existing panelboard designs are divergent and costly due to different design criteria, requiring expensive tooling and inventory for manufacturing, and face structural stresses from high magnetic forces during short circuit conditions.
Innovation Solution
A panelboard assembly with common base rails, interchangeable bus supports, and modular breaker mounting barriers that accommodate buses of varying widths and thicknesses, allowing for cost-effective manufacturing and structural support during high-force conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple different panelboard designs are developed to accommodate different design criteria, then the panelboards can meet diverse electrical distribution requirements, but the manufacturing cost increases due to expensive tooling and inventory of multiple components
Solution Approach 1:
The bus support is designed with a universal structure that can accommodate multiple bus configurations (different widths, thicknesses, and materials) through a single standardized component. The bus support includes standardized mounting features and support surfaces that work with various bus types, eliminating the need for different bus support designs for different panelboard specifications.
Solution Approach 2:
The invention accommodates different bus parameters (width, thickness, material) by maintaining a constant bus support structure while allowing the bus itself to vary in these parameters. The bus support is designed with adjustable or adaptable features such as positioning elements and support surfaces that can accommodate parameter variations in the bus without requiring changes to the bus support design.
2Reliability
If panelboards are designed with specific bus bar sizes and configurations to meet rating requirements, then the electrical performance is optimized, but the device complexity increases due to divergent designs
Solution Approach 1:
The panelboard design is segmented into standardized modules including the bus support, breaker mounting barriers, and base rails. Each module is designed independently with standardized interfaces, allowing different bus configurations to be integrated into the same modular framework without increasing overall system complexity.
Solution Approach 2:
The bus support serves multiple functions: supporting different bus configurations, providing mounting locations for breaker barriers, and ensuring proper electrical clearances. This multi-functionality reduces the need for separate components for each function, thereby reducing device complexity while maintaining electrical performance.
3Strength
If the panelboard assembly is designed to accommodate high magnetic forces during short circuit conditions, then the structural integrity is maintained, but the manufacturing cost increases due to larger and more robust components
Solution Approach 1:
The bus support and breaker mounting barriers are designed with preliminary structural reinforcement to counteract the high magnetic forces that occur during short circuit conditions. The design includes features such as strengthened mounting points and support structures that are pre-configured to resist the expected magnetic forces, preventing structural failure without requiring excessively large components under normal conditions.
Solution Approach 2:
The structural parameters of the bus support and mounting barriers are optimized to provide sufficient strength for short circuit conditions while maintaining cost-effective dimensions for normal operation. The design uses parameter optimization to achieve the minimum required structural integrity without over-engineering the components.
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
Enables the production of panelboards with different sizes and amperage ratings using common components, reducing tooling costs and inventory complexity while providing structural integrity under short circuit conditions.
Implementation Method 1
Under short circuit conditions, the electrical impedance on an external load is reduced to a very low value, thus allowing the flow of current many times higher than intended for the branch circuit. An important effect of these extremely high current levels is the creation of intense magnetic fields that may cause very high attractive and repulsive magnetic forces between the various conductors within the circuit and also within the panelboard.
Data Source
AI summary
A panelboard assembly having common components is disclosed. The panelboard assembly includes base rails, a first bus support extending between the base rails, the first bus support accommodating different thickness buses, buses coupled to the first bus support, and one or more breaker mounting barriers received over top of the buses. In some embodiments, the one or more breaker mounting barriers accommodating different width buses. Methods of assembling the panelboard assembly are disclosed, as are other aspects.