HH Drop-Out Fuse Mechanism for Sparkless High-Voltage Tripping
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Solution Overview
Problem
Existing drop-out security systems in high-voltage electrical power distribution suffer from spark flights when the fuse is triggered, which can lead to large fires in dry or forest areas, posing a risk of natural disasters with high follow-up costs.
Innovation Solution
The use of an HH fuse with an external safety housing and a spiral winding body, designed to ensure sparkless operation by swiveling out of the contact position without an explosion, and incorporating a mechanical swivel movement triggered by a spring-loaded pencil.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a drop-out safety system uses an explosion mechanism (black powder) to swing out the safety when triggered, then the safety device can be reliably triggered and visually indicated, but flying sparks are generated that can lead to large-scale fires in dry or forested areas
Solution Approach 1:
The invention extracts and removes the explosion mechanism (black powder) from the safety device, replacing it with a mechanical spring-loaded striker that hits an anvil to trigger the drop-out mechanism. This eliminates the source of flying sparks while preserving the reliable triggering function.
Solution Approach 2:
The invention introduces a spring-loaded striker and anvil as intermediary mechanical components between the triggering event and the drop-out mechanism. The striker-anvil interaction provides a controlled mechanical triggering method that avoids the harmful explosion effect while maintaining system reliability.
2Ease of operation
If the fuse is mounted at an angle to the cables to shift the center of gravity, then the fuse holder rotates and falls down under its own weight when the fuse blows, but this mechanical rotation may generate sparks during the transition
Solution Approach 1:
The invention removes the reliance on explosive force or uncontrolled mechanical rotation to achieve the drop-out indication. Instead, it uses a controlled spring-loaded striker mechanism that triggers the drop-out without generating harmful sparks during the transition.
Solution Approach 2:
The invention replaces the explosive mechanical system with a controlled spring-mechanical system. The spring-loaded striker provides a precise, controlled mechanical action that triggers the drop-out mechanism without the uncontrolled rotation and spark generation associated with the previous system.
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 HH fuse effectively prevents spark flights during triggering, reducing the risk of fires and allowing safe operation in high-risk environments, while ensuring secure switching and current protection in high-voltage systems.
Implementation Method 1
a spring-loaded striker pin (10) which is movably mounted in the fuse housing (4) and held on the fuse housing (4) by a retaining means (14)
Implementation Method 2
a spring-loaded striker pin (10)
Implementation Method 3
at least one fusible element (6) wound, preferably spirally, around at least one, in particular electrically insulating, winding body (5)
Implementation Method 4
the HV HRC fuse pivots around its center of gravity. Thus, even in the outward pivoting position, the HV HRC fuse is connected to the drop-out tripping mechanism
Data Source
Figure 1~2
Figure 3A~3B
Figure 4
AI summary
The invention relates to the use of a high-voltage fuse (1), in particular a full-range high-voltage fuse, for a drop-out fuse system (2) with a drop-out tripping mechanism (3), wherein the high-voltage fuse (1) has an outer fuse housing (4), wherein at least one fusible link (6) wound around at least one, in particular electrically insulating, coiled body (5), preferably spirally, is provided in the fuse housing (4), wherein the fuse housing (4) is at least partially open at two end faces (7), wherein at least one contact cap (8, 9), preferably designed for electrical contact, is arranged on each end face of the fuse housing (4), wherein the upper contact cap (8) can be detachably connected to the drop-out tripping mechanism (3) in a contacting position.wherein the lower contact cap (9) is pivotably mounted on the drop-out release mechanism (3) and wherein the drop-out release mechanism (3) is designed such that the tripping of the HH fuse (1) leads to the tripping of the drop-out release mechanism (3), thereby separating the upper contact cap (8) from the drop-out release mechanism (3) and pivoting the HH fuse (1) from the contacting position into a pivoting position.