Electrical Terminal Leakage Current Extension for High Voltage
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Solution Overview
Problem
Existing electrical connection terminals for higher voltages, such as 1000 V, require significant size increases to maintain clearance and creepage distances, making them complex and non-universal in application.
Innovation Solution
A compact electrical connection terminal design featuring a leakage current extension with alternating groove-like and spring-like structuring on the connecting element, which extends the creepage distance and allows higher voltages without increasing terminal size, combined with a latching element that further enhances the creepage distance by protruding into the wall.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal size is increased to maintain clearance and creepage distances for higher voltages, then the voltage handling capability is improved, but the device complexity and production complexity increase significantly
Solution Approach 1:
The patent applies dimensionality change by transforming the two-dimensional flat surface of the connecting element into a three-dimensional structured surface with grooves and ridges. The leakage current extension features alternating groove-like and spring-like structuring that extends the creepage distance in the longitudinal direction without increasing the transverse dimensions of the terminal. This allows higher voltage handling while maintaining compact terminal size and simplicity.
2Reliability
If the creepage distance is extended to handle higher voltages, then the voltage rating is improved, but the terminal volume increases
Solution Approach 1:
The patent resolves this contradiction by utilizing the longitudinal dimension of the connecting element to extend the creepage path. The groove-like and spring-like structures create an extended leakage current path along the length of the connecting element, achieving the required creepage distance for high voltage applications without increasing the cross-sectional area or overall volume of the terminal housing.
Solution Approach 2:
The leakage current extension is integrated within the existing terminal structure, with the grooves and ridges nested within the connecting element's geometry. The structured surface is formed as part of the connecting element itself, eliminating the need for separate external components and maintaining compact terminal dimensions.
3Adaptability or versatility
If the terminal is designed for universal application across different voltage levels, then the adaptability is improved, but the design complexity increases
Solution Approach 1:
The patent achieves universality by designing a single terminal structure with integrated leakage current extension that can handle both low and high voltage applications. The groove-like and spring-like structuring on the connecting element provides the necessary creepage distance for high voltage (up to 1000 V) while maintaining compatibility with standard low voltage applications, eliminating the need for different terminal designs for different voltage levels.
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to an electrical connecting terminal for feeding a line through a wall 1, comprising a first terminal 2 for attaching to one side of the wall and a second terminal 3 for attaching to the other side of the wall 1, wherein the first terminal 2 comprises a connecting element 4 for connecting to the second terminal 3, the connecting element 4 can be inserted into the second terminal 3, the second terminal 3 comprises a busbar 6 for electrically connecting to the first terminal 2, the busbar 6 can be inserted into the connecting element 4, and the surface of the connecting element 4 facing away from the busbar 6 comprises a leakage current extension 10. The leakage current extension 10 according to the invention enlarges the leakage distance so that the electrical connecting terminal according to the invention can be exposed to higher voltages.