High-Voltage Cable Termination Sheds with Integral Supports

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Solution Overview

Problem

Existing cable terminations for high-voltage applications lack sufficient rigidity and effective creepage distance, leading to potential electrical leakage and increased material usage, which affects their performance and cost-effectiveness.

Innovation Solution

A cable termination design featuring a tubular body with radially extending sheds and integral supports, manufactured from silicon rubber material, which enhances rigidity and self-cleaning properties while optimizing material usage and creepage distance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If cable terminations are manufactured with traditional materials and designs, then material usage is reduced, but rigidity and creepage distance are insufficient leading to electrical leakage

Engineering Contradiction:

ImproverigidityVSAvoidelectrical leakage prevention

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The cable termination incorporates a composite structure combining a tubular body made of non-conductive material (such as polymer or porcelain) with integrally formed sheds and supports. This composite design provides both the necessary rigidity through the structural integration and the electrical insulation properties, preventing electrical leakage while maintaining structural strength.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The cable termination features multiple sheds extending radially from the tubular body at different positions and angles. These segmented sheds increase the creepage distance by creating a longer electrical path along the surface, effectively preventing electrical leakage while distributing the mechanical loads to maintain rigidity.

Inventive Principle:

Principle #1Segmentation

2Strength

If cable terminations use traditional designs without integral supports, then manufacturing is simpler, but rigidity is insufficient

Engineering Contradiction:

ImproverigidityVSAvoidstructural complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The supports and sheds are integrally formed with the tubular body as a single piece, eliminating the need for separate components and assembly steps. This merging of parts achieves the desired rigidity through structural integration while actually simplifying manufacturing by reducing the number of parts and assembly operations required.

Inventive Principle:

Principle #5Merging (Combining)

3Reliability

If cable terminations increase creepage distance through traditional means, then electrical leakage is prevented, but material usage increases

Engineering Contradiction:

Improvecreepage distanceVSAvoidmaterial usage

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

Instead of increasing creepage distance by extending the length of the tubular body in one dimension, the invention uses radially extending sheds that create additional surface path in three-dimensional space. This dimensional approach increases the electrical creepage path while maintaining a compact overall size and using material more efficiently.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS8901430B2Cable termination for high-voltage cable application

Publication Date: 2014.12.02 G & W ELECTRIC CO

AI summary

A cable termination includes a tubular body having an outer surface and a through aperture, and at least one shed extending from the outer surface. The shed includes an outer edge. A first support is coupled to the shed, extends between the outer surface of the tubular body and the outer edge of the shed, and is configured to increase the rigidity of the shed.