Current-Carrying Profile Segmentation for Insulation
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Solution Overview
Problem
Current current-carrying profiles face challenges in maintaining adequate clearance and creepage distances, especially when made of plastic materials that expand or contract with temperature changes, leading to potential electrical insulation failures and safety hazards.
Innovation Solution
The design incorporates projections and recesses on the end faces of current-carrying profile elements, where groove side walls from one element extend into recesses of adjacent elements, ensuring extended clearance and creepage distances, even with length variations, by interlocking and maintaining air gaps and height offsets between electrical conductors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If plastic profile elements are used for current-carrying profiles, then cost-effective production and ease of manufacture are improved, but clearance and creepage distances cannot be ensured due to thermal expansion and contraction
Solution Approach 1:
The profile is divided into multiple profile elements that can be assembled together. Each element has grooves for electrical conductors and is designed to maintain proper spacing when assembled in sequence, allowing thermal expansion without compromising electrical insulation distances.
Solution Approach 2:
Non-conductive profile elements act as intermediaries between electrical conductors and the external environment. These elements maintain fixed geometric relationships and spacing, ensuring that clearance and creepage distances are preserved even when the overall structure expands or contracts thermally.
2Adaptability or versatility
If profile elements are joined together to form long current-carrying profiles, then adaptability and versatility are improved, but maintaining consistent clearance distances becomes difficult due to length variations
Solution Approach 1:
The system uses standardized profile elements with consistent groove geometries and spacing. Each element is manufactured with precise dimensions, and when assembled in sequence, they maintain uniform clearance distances throughout the entire length, regardless of the total number of elements used.
Solution Approach 2:
The design accounts for thermal expansion by allowing the overall length to vary while maintaining fixed local parameters. The groove spacing and conductor positioning within each element remain constant, ensuring that clearance distances are preserved even as the total profile length changes with temperature.
3Reliability
If grooves are made deeper to increase creepage distance, then electrical insulation is improved, but the groove width available for conductor accommodation is reduced
Solution Approach 1:
Instead of increasing groove depth in one dimension, the design achieves increased creepage distance by extending the profile element length in another dimension. The grooves maintain their original depth and width for conductor accommodation, while the extended profile provides additional path length for creepage, effectively solving the problem in a different dimensional direction.
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 configuration effectively maintains sufficient electrical insulation and safety by ensuring consistent clearance and creepage distances, protecting against accidental contact and maintaining electrical integrity despite changes in length due to temperature influences.
Implementation Method 1
with changes in length occurring with plastic material
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
A current-carrying profile with an electrically insulating profile element (2a, 2b) is described, which has parallel grooves (4a, 4b) extending in a longitudinal direction (L) of the profile element (2a, 2b). The grooves (4a, 4b) are bounded by a pair of groove side walls (5) and have a groove base (6). The current-carrying profile has electrical conductors (3) which are received in the grooves (4a, 4b) of the profile element (4a, 4b) and extend parallel to each other in the longitudinal direction (L) of the profile element (4a, 4b). The profile element (4a, 4b) has projections (7) on one end face. The projections (7) are formed from a groove side wall (5) or from a group of groove side walls (5) with an intermediate groove (4a, 4b) and are designed to engage in a recess (8) on an end face of an adjacent profile element (2a, 2b).