Fuse Unit Segmentation for Flexible Low-Rated Line Addition
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Solution Overview
Problem
Existing fusible links with integrally formed busbars cannot easily accommodate combinations of fusible elements with largely different rated current values, making it difficult to add or change low-rated lines, limiting flexibility in accommodating various rating needs.
Innovation Solution
A fuse unit configuration that includes a high-rated fusible link with integrally formed fusible elements and a detachable low-rated fuse box connected downstream, allowing for the attachment of low-current fuses with smaller rated values, enabling flexible addition of low-rated lines without altering the high-rated fusible link.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fusible elements are integrally formed on a busbar with fixed conductivity and sizes, then the rated current values are determined, but it cannot provide a combination of fusible elements having largely different rated current values
Solution Approach 1:
The invention divides the fusible link system into two independent parts: a high-rated fusible link with integrally formed busbar and fusible elements, and a separate low-rated fuse box containing low-current fuses. This segmentation allows each part to be optimized independently, enabling flexible combination of vastly different rated current values (e.g., 140A and 7.5A) without complicating the integral busbar design.
Solution Approach 2:
The low-rated fuse box acts as an intermediary component that connects to one terminal of the high-rated fusible link. This intermediary structure enables the system to accommodate low-rated lines by providing a dedicated interface point, allowing flexible addition or change of low-rated fuses without modifying the existing high-rated fusible link configuration.
2Adaptability or versatility
If the fusible link structure is fixed with integral busbar, then manufacturing is simplified, but it is difficult to add a low-rated line or change an add-on line
Solution Approach 1:
By segmenting the system into a fixed high-rated fusible link and a separate low-rated fuse box, the invention maintains the manufacturing simplicity of the integral busbar while enabling flexible addition of low-rated lines through the detachable fuse box connection.
Solution Approach 2:
The low-rated fuse box is designed as a pre-configured module that can be attached to the high-rated fusible link. This preliminary preparation of the fuse box as a separate unit allows for easy addition or modification of low-rated lines without requiring changes to the manufacturing process of the main fusible link.
3Adaptability or versatility
If a single busbar is used for all fusible elements, then the structure is compact, but it cannot flexibly accommodate needs for addition of lines of various ratings
Solution Approach 1:
The invention segments the fusible link system into a compact high-rated fusible link and a separate low-rated fuse box. This segmentation maintains the compactness of the original integral structure while providing flexible accommodation for various rated lines through the detachable fuse box connection.
Solution Approach 2:
The low-rated fuse box is designed to connect to and nest with the high-rated fusible link structure. This nesting arrangement allows the fuse box to be attached in a space-efficient manner, maintaining overall compactness while enabling flexible addition of low-rated lines.
Data Source
AI summary
A fusible link having a high-rated terminal group and a low-rated fuse box are provided. The low-rated fuse box has a power-source-side terminal connected to an auxiliary terminal of the fusible link, a load-side connection terminal to be connected to a load side, a holder configured to hold the power-source-side terminal and the load-side connection terminals, and a low-current fuse configured to electrically connect, when attached to the holder in a detachable manner, the power-source-side terminal and the load-side connection terminals to each other.