Compact Dual Element Fuse Module Design
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Solution Overview
Problem
Existing time-delay fuses with dual-element configurations occupy excessive space due to a one-to-one pairing of overcurrent and short-circuit protection elements, leading to increased size and reduced versatility and cost-effectiveness.
Innovation Solution
A compact dual-element fuse module design featuring a fuse element assembly with multiple trigger mechanisms sharing a single short-circuit protection element, housed in a thermoplastic fuse housing, allowing for higher ampacity ratings while minimizing the overall footprint and utilizing identical trigger mechanisms across various ampacity ratings for cost-effective manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a one-to-one pairing of overcurrent protection element and short-circuit protection element is used, then the dual-element configuration provides complete protection functionality, but the fuse occupies excessive space and increases in size
Solution Approach 1:
The patent combines multiple overcurrent protection elements (first, second, and third overcurrent protection elements) to share a single short-circuit protection element. This merging approach reduces the total number of components compared to a one-to-one pairing scheme, thereby decreasing the overall fuse size while maintaining complete protection functionality across different ampacity ratings.
Solution Approach 2:
The single short-circuit protection element is designed to serve multiple functions by protecting different overcurrent protection elements across various ampacity ratings (e.g., 600A, 800A, 1000A, 1200A). This universal element can be selectively engaged to provide short-circuit protection for different current ratings, eliminating the need for separate short-circuit elements for each rating.
2Adaptability or versatility
If multiple different elements are provided for different ampacity ratings, then the fuse can accommodate various current requirements, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent employs identical overcurrent protection elements and a single universal short-circuit protection element that can serve multiple ampacity ratings. The same basic element design is used across 600A, 800A, 1000A, and 1200A ratings, with configuration variations rather than completely different elements, thereby reducing device complexity while maintaining versatility.
Solution Approach 2:
The patent achieves different ampacity ratings by changing the configuration parameters (such as the number of overcurrent protection elements in parallel: 3 for 600A, 4 for 800A, 5 for 1000A, 6 for 1200A) rather than using fundamentally different elements. This parameter-based differentiation simplifies manufacturing compared to producing multiple types of elements for each rating.
3Adaptability or versatility
If multiple different elements are manufactured for different ratings, then various ampacity requirements are met, but production costs increase
Solution Approach 1:
The patent reduces production costs by manufacturing identical overcurrent protection elements and a single type of short-circuit protection element that can be configured in different quantities and arrangements to achieve various ampacity ratings. This standardization allows for economies of scale in manufacturing the same components, eliminating the need for expensive custom-element production for each rating.
Solution Approach 2:
The universal short-circuit protection element is designed to function across multiple ampacity ratings (600A-1200A), allowing a single component design to be produced in high volumes for all ratings. This universality significantly reduces per-unit manufacturing costs compared to producing separate short-circuit elements for each rating.
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 design achieves a more compact and versatile time-delay fuse module with enhanced interruption capabilities, reduced material usage, and lower production costs, while maintaining high energy density to withstand current interruptions effectively.
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 and a fuse element assembly contained within the housing. The fuse element assembly includes at least one fuse element unit having a plurality of trigger mechanisms and a perforated strip electrically connected to the trigger mechanisms. Increased ampacity ratings in a more compact arrangement provides for fuse modules having increased current protection capability that, in turn, provides for improved disconnect switching capabilities.