Underground Fused Tap for Cable Protection
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Solution Overview
Problem
Current methods for in-line fusing in underground electrical distribution systems require re-termination of cables, leading to prolonged power outages and increased man-hours for installation and replacement, as they necessitate discarding existing terminations and reconfiguring cable ends.
Innovation Solution
A fused tap design for an elbow connector that allows for quick replacement or installation without cable re-termination, utilizing a molded rubber sleeve housing with split parts and threaded terminals for easy access and secure connections, enabling rapid installation or replacement within minutes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current methods for in-line fusing are used in underground electrical distribution systems, then protection and isolation are provided, but cable re-termination is required which prolongs installation and replacement time
Solution Approach 1:
The device segments the fusing function from the cable termination by introducing a separate fused tap unit that connects to the existing cable termination through a coupling mechanism. This allows the fuse to be independently installed and replaced without affecting the cable termination, thereby reducing installation and replacement time while maintaining protection and isolation functionality.
Solution Approach 2:
The fused tap acts as an intermediary device between the existing cable termination and the load. It couples to the existing termination without requiring re-termination, providing in-line fusing protection while allowing quick installation and replacement by simply connecting and disconnecting the fused tap from the existing termination.
2Reliability
If current methods for in-line fusing are used, then protection is provided, but existing terminations must be discarded and reconfigured
Solution Approach 1:
By separating the fusing function into a distinct fused tap unit that couples to existing terminations, the invention eliminates the need to discard and reconfigure existing terminations. The segmented design allows the fuse to be installed in a separate module that attaches to the existing termination structure.
Solution Approach 2:
The fused tap is designed with universal coupling capabilities that can interface with existing termination types without requiring them to be discarded. The device provides multi-functionality by combining fuse holding, cable attachment, and electrical connection in a single unit that works with existing infrastructure.
3Reliability
If cable re-termination is required for in-line fusing, then protection is achieved, but man-hours for installation and replacement increase
Solution Approach 1:
The segmented fused tap design allows protection functionality to be added without requiring cable re-termination. The fuse is installed in a separate unit that couples to existing cables, enabling rapid installation and replacement that does not involve time-consuming cable termination processes.
Solution Approach 2:
The fused tap is pre-assembled with the fuse and coupling mechanisms before field installation. This preliminary preparation eliminates the need for time-consuming on-site cable re-termination and configuration, allowing installers to simply connect the pre-assembled unit to existing terminations, thereby significantly improving installation efficiency.
Data Source
AI summary
A fused tap for an elbow connector that properly insulates and houses an interruption device or fuse to provide protection on underground distribution power lines. The interruption device is replaceable without the need of replacing the entire assembly. The fused tap provides flexibility in installation for existing and new underground distribution lines and/or feeders.