Fuse Holder With Blocking Device For Safe Carrier Removal
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Solution Overview
Problem
Existing fuse holders in electrical transmission equipment face challenges in accessibility and safety, particularly when fuses are located in poorly accessible areas, as they require replacement without disabling power lines and often lack efficient mechanisms for handling large fuses, which complicates safe insertion and removal.
Innovation Solution
A fuse holder design featuring a toggle switch with a blocking device that ensures electrical isolation before fuse removal, allowing for safe handling and minimizing the size of the fuse holder by enabling the fuse carrier to be separable along its longitudinal axis, and incorporating electrical contacts for secure engagement and disengagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the fuse box is minimized in size to improve space efficiency, then the device complexity is reduced, but accessibility for fuse replacement becomes difficult
Solution Approach 1:
The fuse holder is divided into a stationary body and a removable carrier. The carrier can be extracted from the body without removing the entire fuse holder assembly, allowing operators to access and replace fuses in a compact configuration while maintaining ease of operation through modular component separation.
2Ease of operation
If the toggle switch is allowed to engage freely without blocking, then the ease of operation is improved, but electrical safety is compromised when fuse carrier is absent
Solution Approach 1:
The blocking device prevents the toggle switch from engaging in the closed position when the fuse carrier is absent, anticipating and preventing a potentially dangerous state before it can occur. This ensures electrical isolation is maintained during fuse replacement operations while allowing normal operation when the carrier is properly installed.
Solution Approach 2:
The blocking device acts as an intermediary mechanism between the toggle switch and the fuse carrier presence. It mediates the interaction by physically preventing switch engagement unless the carrier is properly installed, thereby ensuring safety without complicating the overall operation.
3Productivity
If the fuse holder accommodates multiple large fuses, then the productivity is improved, but the device complexity and size increase
Solution Approach 1:
Multiple fuses are combined within a single removable carrier assembly. This allows operators to service multiple fuses simultaneously by removing and replacing the entire carrier, improving productivity while maintaining a compact and simple overall holder structure.
Solution Approach 2:
The fuse holder structure is segmented into the stationary body and removable carrier, allowing multiple fuses to be accommodated in a organized, space-efficient manner within the carrier portion, reducing overall device complexity while maintaining productivity.
Data Source
AI summary
A fuse holder for holding a fuse is provided that includes a body, a line side connector supported by the body, and a load side connector supported by the body. The fuse holder also includes a toggle switch supported by the body and capable of toggled engagement in a first position that provides electrical connection. The switch is also capable of toggled engagement in a second position that provides electrical isolation between the line side connector and the load side connector. The fuse holder also includes a fuse carrier. The fuse carrier is supported by the body and adapted for holding the fuse and the fuse carrier is adapted to be removed from the fuse holder. The fuse holder includes a blocking device blocking the toggled engagement of the switch from the second position to the first position when the fuse carrier is not within the fuse holder.