Modular Fuse Removal Tool Accessory for Fusible Disconnect Devices
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Solution Overview
Problem
Existing fusible disconnect devices face challenges in easily removing fuses, especially when access is limited and high removal forces are required, leading to difficulties in replacing fuse modules in electrical circuits.
Innovation Solution
A removal tool accessory that provides mechanical leverage and can be snap-fit to the fuse module, allowing for easy removal without conventional tools, and is designed to work with various fuse module sizes and ratings, facilitating quick and safe replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional tools and methods are used to remove fuses, then removal force can be applied, but access is limited and removal becomes difficult in crowded panelboard arrangements
Solution Approach 1:
A removal tool accessory is introduced as an intermediary device between the user and the fuse module. This tool includes a fuse engagement portion with depending arms that engage the lateral sides of the fuse module housing, and a handle grip portion that provides leverage. The tool acts as a mediator that translates user force into effective removal action without requiring direct hand access to the fuse module, thereby resolving the contradiction between ease of operation and limited physical access space.
2Force
If high removal forces are applied to extract fuse modules, then removal can be achieved, but the operation becomes difficult and potentially unsafe
Solution Approach 1:
The removal tool accessory extends the operational dimension by providing a handle grip portion that projects outwardly from the fuse engagement portion. This dimensional extension allows the user to apply force at a distance from the fuse module, creating a lever arm that amplifies the removal force. The tool distributes the required force across multiple engagement points (depending arms engaging lateral sides) rather than concentrating it at a single point, making the high-force operation easier and safer to perform.
3Ease of operation
If minimal physical access is required for fuse removal, then usability in crowded arrangements improves, but conventional tools cannot be effectively used
Solution Approach 1:
The removal tool accessory merges multiple functional elements into a single integrated device: the fuse engagement portion with depending arms for gripping the fuse module housing, the handle grip portion for applying leverage, and the overall structure that fits within limited access spaces. This merged design eliminates the need for separate conventional tools (screwdrivers, pliers, etc.) and provides all necessary functions in one compact accessory, thereby improving usability in crowded arrangements without excessive complexity.
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
Enables convenient and safe removal of fuse modules with minimal physical access, reducing the need for tools and improving usability, especially in crowded panelboard arrangements, while ensuring compatibility and safety.
Implementation Method 1
A removal tool accessory that provides mechanical leverage and can be snap-fit to the fuse module, allowing for easy removal without conventional tools
Data Source
AI summary
A removal tool accessory for replacing rectangular fuse modules of a fusible switching disconnect device. The removal tool accessory is a single piece part configured to snap-fit with the rectangular fuse module via opposing lateral sides thereof. The accessory includes an opening dimensioned to receive a person's index finger, middle finger, ring finger, and baby finger. A handlebar is provided for optimal mechanical leverage to pull the rectangular fuse module from the fusible switching disconnect device even when access to the rectangular fuse module is restricted.