Sliding-Housing Electrical Fuse for Easier Arc-Quenching Assembly
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Solution Overview
Problem
Existing electrical fuses face challenges in manufacturing complexity, particularly in assembling the conductor element and filling arc quenching material, due to cumbersome insertion and sealing processes, which can lead to premature triggering and increased costs.
Innovation Solution
An electrical fuse design featuring a multi-part insulating housing with sliding engagement of parts and an integrally formed conductor element with extension sections that simplifies assembly by guiding the conductor through a single opening, allowing easy filling of the interior space with arc quenching material without additional connecting means.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the second opening cross-section is made larger than the first opening to facilitate conductor insertion and filling, then assembly becomes easier, but additional connecting means are required to hinder movement of the sealing section
Solution Approach 1:
The housing is segmented into two parts where the first housing part contains the first opening and the second housing part contains the second opening. This segmentation allows the conductor element to be inserted through the larger second opening while the first housing part provides the sealing function, eliminating the need for additional connecting means to secure the sealing section
Solution Approach 2:
The second housing part serves multiple functions: it provides the larger opening for easy conductor insertion, acts as a sealing structure, and secures the conductor element in place. This multi-functionality eliminates the need for separate connecting means to prevent movement of the sealing section
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 design enhances manufacturing simplicity, ensures reliable current interruption above rated levels, reduces the risk of premature triggering, and eliminates the need for costly connecting means, while enabling the use in high-current applications with effective arc quenching.
Implementation Method 1
the first extension section seals the first opening, and the second extension section seals the second opening
Implementation Method 2
A fusible wire extending through the inside of the housing connects the two end caps. The fusible wire is dimensioned such that it melts when a predefined, maximum allowable electrical current flows through the wire
Implementation Method 3
filling the interior space with a filling material, e.g. an arc quenching material
Data Source
AI summary
An electrical fuse (100) comprising: —an electrical conductor element (108) comprising a melting section (110) and further comprising a first extension section (112) and a second extension section (114) both integrally formed with the melting section (110) and extending from both ends of the melting section (110) in the lengthwise direction thereof, —an electrically insulating, multi-part housing (102), which encloses said melting section (110) in an interior space (116), wherein the multi-part housing (102) comprises a first part (104) and a second part (106) slidingly engaged with said first part (104) and arranged such that the second part (106) covers an access opening (118) of the first part to the interior space (116), and wherein the first extension section (112) and second extension section (114) comprise a terminal area, respectively, both terminal areas are arranged outside the multi-part housing (102).