Pre-expanded Cable Cover Assembly with Neutral Conductor Duct
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Solution Overview
Problem
Existing methods for protecting and insulating electrical connections, such as cold shrinkable covers for concentric neutral cables, face challenges in performance and installation, particularly in accommodating neutral conductors and ensuring adequate electrical continuity.
Innovation Solution
A pre-expanded cover assembly unit comprising an elastomeric inner sleeve, an outer sleeve, and a flexible duct system that allows for easy installation and maintains electrical continuity by accommodating neutral conductors, with a removable holdout mechanism that reduces installation force and prevents radial collapse of the duct.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cold shrinkable covers are used to protect electrical connections, then cable protection is improved, but installation complexity increases due to separate components needed for neutral conductors
Solution Approach 1:
The patent combines the inner sleeve, outer sleeve, and neutral conductor ducts into a single integrated cold shrinkable cover assembly. This merging of previously separate components (inner cover, outer cover, and neutral conductor protection) into one unitary structure eliminates the need for separate installation steps and reduces installation complexity while maintaining comprehensive protection for both primary and neutral conductors
2Strength
If rigid duct structures are used to protect neutral conductors, then structural strength is improved, but adaptability decreases due to inability to bend during installation
Solution Approach 1:
The patent employs flexible duct structures with corrugated or ribbed walls that provide structural strength to protect neutral conductors while allowing the ducts to bend and flex during installation. The flexible material and structural design enable the ducts to conform to installation requirements and accommodate movement during the cold shrinking process, resolving the contradiction between rigidity and flexibility
3Manufacturing precision
If high installation force is applied to expand the cover assembly, then coverage completeness is improved, but risk of duct radial collapse increases
Solution Approach 1:
The patent incorporates pre-installed support elements such as ribs, corrugations, or temporary support structures within the ducts that maintain their radial shape during the expansion process. These pre-built structural features resist radial collapse when expansion force is applied, allowing the cover assembly to be fully expanded for complete coverage without compromising duct integrity. The support structures are designed to withstand the expansion forces while maintaining duct patency
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 provides an efficient and easy-to-install cover assembly that ensures proper electrical continuity and protection of both primary and neutral conductors, improving upon existing methods by reducing installation complexity and ensuring adequate neutral conductor gauge continuity.
Implementation Method 1
an elastomeric inner sleeve, an elastomeric outer sleeve
Implementation Method 2
The duct is flexible. The duct is operative to resist radial collapse of the duct and to bend radially inwardly as the holdout is axially removed from the inner sleeve
Data Source
AI summary
An integral, unitary pre-expanded cover assembly unit for covering an electrical connection between first and second electrical cables each having a primary conductor and a sleeve defines a cable passage to receive the electrical connection and the primary conductors of the first and second cables. The outer sleeve surrounds the inner sleeve. The duct is neutral conductor includes a cover assembly and a removable holdout. The cover assembly includes an elastomeric inner sleeve, an elastomeric outer sleeve, and a duct. The inner interposed radially between the inner and outer sleeves. The duct defines a duct passage configured to receive at least one of the neutral conductors therethrough. The holdout is mounted within the inner sleeve. The holdout is operative to temporarily maintain the inner sleeve in an expanded state and the outer sleeve in an expanded state. The duct is flexible. The duct is operative to resist radial collapse of the duct and to bend radially inwardly as the holdout is axially removed from the inner sleeve.