Adjustable Fuse Holder Assembly for Covered Bolt-Down Fuse Mounting
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Solution Overview
Problem
Linear bolt-down fuses often result in tangled cabling, inadequate busbar apertures, exposed studs and terminals, and unsupported fuse ends, leading to potential short circuits and flexing issues.
Innovation Solution
A fuse holder assembly with a movable tab and base design that accommodates various fuse distances, supports different sizes and voltage ratings, and allows for stacking, featuring dovetail connectors and lock ramps for secure attachment and alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple bolt-down fuses are used with external studs and terminals, then electrical connection capability is improved, but exposure to elements and short circuit risk increases
Solution Approach 1:
The patent combines multiple fuse holders into a single integrated housing structure that encloses all studs and terminals. The housing merges previously separate components into one protected assembly, eliminating exposure to elements while maintaining electrical connection capabilities through internal terminal arrangements.
Solution Approach 2:
The housing acts as an intermediary protective barrier between the electrical components (studs and terminals) and the external environment. This mediator structure prevents direct exposure to elements and potential short circuits while allowing the electrical connections to function properly through controlled access points.
2Ease of operation
If linear bolt-down fuses are used without support structures, then installation simplicity is improved, but fuse terminal flexing and instability increase
Solution Approach 1:
The housing and support structures are pre-configured during manufacturing to provide immediate support to fuse terminals upon installation. The internal ribs, mounting surfaces, and terminal support features are built-in beforehand, so installers only need to insert the fuse without additional support work, maintaining simplicity while ensuring stability.
Solution Approach 2:
The housing is segmented into multiple support structures including internal ribs, mounting surfaces, and terminal support features. These segmented elements distribute support functions throughout the housing, providing localized stability to fuse terminals while maintaining overall structural simplicity for easy installation.
3Ease of operation
If multiple fuses are mounted separately on busbar, then individual fuse accessibility is improved, but busbar aperture requirements and cabling complexity increase
Solution Approach 1:
Multiple fuse holders are merged into a single housing assembly that can be mounted as one unit on the busbar. This combining approach reduces the number of separate mounting operations and simplifies cabling routing, while internal partitions within the housing maintain individual accessibility to each fuse through designated access points.
Solution Approach 2:
The housing serves multiple functions simultaneously: it provides individual access to each fuse, encloses all electrical terminals for protection, simplifies mounting to a single busbar location, and organizes cabling routes. This multi-functionality reduces overall system complexity while maintaining operational accessibility.
Data Source
AI summary
A fuse holder includes a movable tab, a base, and a cover. A stud is affixed to the movable tab and secures a terminal of a bolt-down fuse. A second stud is affixed to the base and secures a second terminal of the bolt-down fuse. The base has a channel into which the movable tab is slidably inserted. The cover connects to the base and is located over the stud and the second stud.