Cold-Shrink Cable Splice Cover With High-Permittivity Void Filling
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Solution Overview
Problem
The formation of electrical connections in the field often exposes bare metal surfaces to harsh environmental conditions, such as rocks and moisture, posing a risk to cable integrity and potentially leading to power outages or safety hazards.
Innovation Solution
A pre-expanded cover assembly for cable splice connections, featuring a tubular, cold-shrinkable, electrically insulative elastomeric splice body with a conformable medium having high electrical permittivity, which is radially contracted onto the connection to interpose between the splice body and cable insulation, providing protection and electrical insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pre-expanded cover assembly with cold-shrinkable elastomeric splice body is used, then protection from environmental hazards and electrical insulation are improved, but device complexity increases
Solution Approach 1:
The cover assembly is divided into distinct functional components: the cold-shrinkable elastomeric splice body providing mechanical protection and environmental sealing, the conformable medium layer providing electrical insulation and void elimination, and the removable holdout enabling controlled deployment. This segmentation allows each component to be optimized for its specific function while working together to protect cable integrity.
Solution Approach 2:
The conformable medium is pre-mounted on the interior surface of the splice body before deployment. This preliminary action ensures that when the splice body contracts onto the cable connection, the medium is already in position to eliminate voids and provide immediate electrical insulation, eliminating the need for separate application steps and ensuring consistent protection.
2Reliability
If a conformable medium with high electrical permittivity is pre-mounted on the splice body, then electrical insulation and elimination of air voids are improved, but manufacturing complexity increases
Solution Approach 1:
The manufacturing process merges multiple functions into a single integrated assembly step. The conformable medium is pre-mounted on the splice body interior surface, so that when the holdout is removed and the splice body contracts, both the mechanical sealing and electrical insulation functions are achieved simultaneously in one deployment action, rather than requiring separate manufacturing and installation steps.
3Ease of operation
If the splice body is made cold-shrinkable and elastomeric, then ease of installation and adaptability are improved, but material complexity increases
Solution Approach 1:
The splice body utilizes cold-shrinkable elastomeric material that changes its physical parameters (dimension, density, rigidity) through temperature variation and elastic recovery. When cooled or compressed during installation, the material shrinks and conforms to the cable connection geometry, providing automatic adaptation without requiring complex adjustment mechanisms or multiple components.
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 effectively protects electrical connections from environmental hazards, enhances electrical reliability by eliminating air voids and contaminants, and maintains dielectric strength, thereby reducing the risk of insulation failures and ensuring cable integrity.
Implementation Method 1
The splice body is mounted on the holdout such that the holdout maintains the splice body in an elastically radially expanded state, and the holdout is selectively removable from the splice body to permit the splice body to elastically radially contract
Implementation Method 2
The splice body assembly further includes a tubular layer of a conformable medium pre-mounted on the interior surface of the splice body. The conformable medium is a flowable material having a high electrical permittivity
Data Source
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AI summary
A pre-expanded cover assembly for protecting a cable splice connection including a cable, the cable including an electrical conductor surrounded by a cable insulation layer, includes a splice body assembly and a removable holdout. The splice body assembly includes a tubular, cold-shrinkable, electrically insulative, elastomeric splice body having an interior surface defining an interior passage. The splice body assembly further includes a tubular layer of a conformable medium pre-mounted on the interior surface of the splice body. The conformable medium is a flowable material having a high electrical permittivity. The splice body assembly is mounted on the holdout such that the holdout maintains the splice body in an elastically radially expanded state, and the holdout is selectively removable from the splice body to permit the splice body to elastically radially contract. The layer of the conformable medium is positioned and configured such that, when the pre-expanded cover assembly is positioned adjacent the cable splice connection, the holdout is removed from the splice body, and the splice body elastically radially contracts onto the cable splice connection, the layer of the conformable medium will be radially interposed between and engage each of the interior surface of the splice body and an opposing interface surface of the cable insulation.