Conductive Centering Ring for Switch Pole Current Capacity
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Solution Overview
Problem
Switch pole connection pieces in switching devices face challenges in achieving optimal centering and current-carrying capacity, particularly in medium-voltage circuit breakers for energy distribution, where existing solutions do not adequately address the need for secure guidance and enhanced electrical conductivity.
Innovation Solution
A connection piece that includes a centering ring with an electrically conductive plain bearing and ventilation openings, mechanically coupled to a conductive connection area, forming an additional current path with a flexible current strip and providing secure guidance and cooling, while the conductive materials ensure enhanced current-carrying capacity and simplified assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a flexible current strip is used to connect the moving contact connection bolt to the connection piece, then electrical conductivity is achieved, but the current-carrying capacity is insufficient
Solution Approach 1:
The patent combines the centering ring and connection piece into a single integrated component. The centering ring is electrically conductively connected to the connection piece via connecting means, forming a unified structure that provides both mechanical centering and electrical conduction functions simultaneously, thereby increasing current-carrying capacity without proportionally increasing device complexity
Solution Approach 2:
The centering ring serves multiple functions: it provides mechanical centering for the vacuum interrupter, guides the moving contact connection bolt through its bush guide, and conducts electrical current alongside the flexible current strip. This multi-functionality increases current-carrying capacity while avoiding the need for separate dedicated components
2Manufacturing precision
If the centering ring is mechanically coupled to the connection piece, then centering and guidance are improved, but additional current paths are required
Solution Approach 1:
The mechanical coupling and electrical connection are merged into a single integrated arrangement. The centering ring is both mechanically coupled to and electrically connected with the connection piece through the same structural assembly, eliminating the need for separate mechanical and electrical connection components
Solution Approach 2:
The connecting means serve dual purposes: they provide mechanical coupling between the centering ring and connection piece for precise centering, and simultaneously establish electrical connection to form a current path. This multi-functionality achieves precise centering without requiring separate dedicated electrical connection components
3Temperature
If ventilation openings are added to the centering ring, then cooling effect is improved, but structural integrity may be compromised
Solution Approach 1:
The centering ring is designed with ventilation openings that create a porous or perforated structure. These openings allow air circulation for cooling the connection piece and surrounding components, while the remaining material maintains sufficient structural integrity through optimized distribution and sizing of the openings
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 significantly improves the centering and current-carrying capacity of switch poles by forming a conductive current path and ensuring secure guidance and cooling, thereby enhancing the performance of switchgear in energy distribution applications.
Implementation Method 1
The electrically conductive plain bearing of the socket guide for the moving contact connecting bolt of the vacuum interrupter in the centering ring increases the current-carrying capacity of the breaker pole on the one hand, because the electrically conductive plain bearing and the centering ring as well as the electrically conductive connecting means of the connection piece for connecting the centering ring to the connection piece provide the additional current path
Implementation Method 2
the centering ring has ventilation openings. Such ventilation openings in the centering ring have a cooling effect on the connecting piece, which further improves the current-carrying capacity of the entire arrangement
Data Source
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AI summary
The invention concerns a connection piece for a switch pole of a switching apparatus which improves the properties of the switch pole as concerns centring and current-carrying capacity. According to the invention, a connection piece (1) for a switch pole (16) of a switching apparatus is provided for connecting in electrically conductive manner to a movement contact connection pin (18) of a vacuum switching tube (17) disposed in the switch pole (16). The connection piece (1) comprises a centring ring (9) for centring the vacuum switching tube (17), the centring ring (9) being formed from an electrically conductive material and being connected in electrically conductive manner via connection means (14, 15) to a connection region (2) of the connection piece (1).