Double-Front Busbar Segmentation for Collision-Free Connections
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Solution Overview
Problem
Existing double-front busbar arrangements in low-voltage switchgear face challenges in preventing collisions during connections from the front and rear while achieving improved current distribution in sub-conductors, leading to complex connection systems and inefficiencies.
Innovation Solution
The busbar arrangement features sub-conductors with increased distances between them, allowing for collision-free connections from both sides and improved current distribution, utilizing at least two pairs of sub-conductors with distances greater than or equal to twice the thickness of a sub-conductor, and optionally adding middle conductor sections for enhanced current uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the distance between front and rear sub-conductors is increased, then connection collisions are avoided and current distribution is improved, but the busbar structure becomes more complex
Solution Approach 1:
The busbar is segmented into multiple sub-conductors (front and rear) with increased spacing between them. This segmentation allows independent connection access from both front and rear sides without collision, while the modular sub-conductor design simplifies the overall connection process despite the increased distance.
2Reliability
If the distance between sub-conductors is increased, then current distribution is improved, but more busbar material is required
Solution Approach 1:
The distance parameter between sub-conductors is optimized to at least twice the thickness of one sub-conductor. This parameter change improves current distribution by reducing skin effect and proximity effect, while the invention compensates for material increase through efficient spacing and configuration of the sub-conductors.
3Area of stationary object
If terminal screws are positioned close together, then the connection system is compact, but terminal screw collisions occur during simultaneous connections
Solution Approach 1:
The connection system transitions from a two-dimensional compact arrangement to a three-dimensional configuration with increased spacing. The terminal screws are positioned on front and rear sub-conductors with sufficient distance between them, allowing simultaneous connections without collision while maintaining a compact overall footprint through vertical and depth-wise arrangement.
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 design simplifies connections, enhances current distribution, reduces material requirements, and supports higher rated currents with more uniform current transmission, enabling efficient and safe assembly with independent terminal screws and spacers for improved performance.
Implementation Method 1
the current distribution in the sub-conductors per phase is also improved due to the skin effect and the proximity effect
Implementation Method 2
the current distribution in the sub-conductors per phase is also improved due to the skin effect and the proximity effect
Data Source
Figure 1
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Figure 4~6
AI summary
The invention relates to a busbar system for a double-front electrical switchgear. The aim of the invention is to provide a solution for a double-front system wherein the connections from the front and the rear do not collide and which at the same time allows an improved current distribution in the subconductors per phase. For this purpose, a busbar (8) comprising at least two first subconductors (18, 19) and at least two second subconductors (20, 21) is used, the distance (23) between the first subconductors (18, 19) and the second subconductors (20, 21) corresponding to at least twice the thickness (31) of a subconductor.