Fuse Module Segmentation for Ampacity and Cost
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Solution Overview
Problem
Higher-ampacity fuses and their accessories are costly to produce due to low market demand, making it impractical to design specialized components, while existing lower-ampacity fuse accessories are incompatible with higher-ampacity fuses.
Innovation Solution
Design higher-ampacity fuse modules and accessories by modifying lower-ampacity fuse modules and accessories with minimal changes, such as combining multiple lower-ampacity fuse modules to achieve higher ampacity ratings and using compatible hardware designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If higher-ampacity fuses are made with larger fuse elements, housings, and terminals, then ampacity rating is improved, but manufacturing cost increases and compatibility with existing accessories is lost
Solution Approach 1:
The fuse element is divided into multiple parallel conductors (e.g., three 500 MCM conductors for a 1500 A fuse) instead of using a single large conductor. This segmentation allows the use of standard-sized conductors that can be manufactured more cost-effectively while achieving the required higher ampacity rating through parallel current paths.
Solution Approach 2:
The housing and terminal designs are made compatible across different ampacity ratings by using standardized connection points and mounting interfaces. This allows a single housing design to accommodate various fuse element configurations (single conductor, multiple parallel conductors) while maintaining compatibility with existing accessories and mounting hardware.
2Power
If higher-ampacity fuses are made with larger fuse elements, housings, and terminals, then ampacity rating is improved, but compatibility with lower-ampacity accessories is lost
Solution Approach 1:
The housing incorporates universal mounting interfaces and connection points that work with both higher- and lower-ampacity fuse elements. For example, the housing can accommodate either a single large conductor or multiple smaller parallel conductors using the same terminal blocks and mounting brackets, allowing accessories designed for lower-ampacity fuses to work with higher-ampacity versions.
Solution Approach 2:
By segmenting the fuse element into multiple parallel conductors, the physical dimensions of individual conductors remain compatible with standard accessory connection points, while the aggregate current-carrying capacity achieves the higher ampacity rating. This allows existing accessories to interface with individual conductors or the assembly as a whole without requiring redesign.
3Adaptability or versatility
If specialized accessories are designed for higher-ampacity fuses, then compatibility is improved, but production cost increases due to low market demand
Solution Approach 1:
Accessories such as fuse holders, mounting brackets, and terminal blocks are designed with universal interfaces that work across multiple ampacity ratings. A single accessory design can accommodate both lower-ampacity (single conductor) and higher-ampacity (multiple parallel conductors) fuse elements, eliminating the need for separate accessory lines and reducing tooling and inventory costs.
Solution Approach 2:
The accessories incorporate localized adaptation features at specific connection points while maintaining overall design standardization. For example, terminal blocks may have adjustable configurations or modular connection points that can accommodate different conductor sizes and arrangements, allowing a single accessory design to serve multiple ampacity requirements without requiring complete redesign.
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
This approach reduces production costs and enhances compatibility between higher-ampacity and lower-ampacity fuse modules and accessories, making higher-ampacity fuses more economically viable and compatible with existing infrastructure.
Implementation Method 1
when electrical current flowing through the fuse exceeds a predetermined limit, the fusible elements melt and open one or more circuits through the fuse
Data Source
AI summary
An embodiment of a fuse module has been disclosed. The fuse module includes a housing, a fuse element unit disposed within the housing, and a pair of terminal blades between which the fuse element unit is electrically connected. Each terminal blade has a pair of connection portions.