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Drop-out fuse

A drop-out fuse and fuse technology, which is applied in the direction of electrical components, circuits, emergency protection devices, etc., can solve problems such as mechanical damage to fuses, abnormal opening of fuses, abnormal power supply, etc., and achieve protection against mechanical damage. Damage, guaranteed normal use, easy to process and manufacture

Inactive Publication Date: 2013-10-23
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of tightening the bolts, the fuse will rotate with the bolt due to friction, which will easily cause mechanical damage to the fuse, resulting in abnormal disconnection of the fuse during operation, which directly leads to abnormal power supply or interruption, resulting in power outages, which brings great inconvenience to residents' work and life
Therefore, the problem that fuses are vulnerable to mechanical damage during installation has always plagued electric maintenance personnel.

Method used

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  • Drop-out fuse

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Such as figure 1 As shown, a drop-out fuse includes a lower moving contact 2 with a fixing hole 1, a bolt 3 arranged in the fixing hole 1, and a fuse 4 installed on the bolt 3; the fixing hole 1 The radial cross-section is non-circular, and a post 5 corresponding to the shape of the fixing hole is arranged between the bolt head of the bolt 3 and the bolt screw, and the fuse 4 is wound on the post 5, The post 5 is inserted into the fixing hole 1 . The advantage of this design is: due to the non-circular row design, the clamping post 5 can only move axially and cannot rotate radially in the fixing hole 1, so when the bolt 3 is fixed with a nut, it is wound around the The fuse 4 on the clamping column 5 can only be subjected to the pressure from the bolt head and the lower moving contact 2, and will not be subjected to rotational friction, effectively avoiding the damage caused by the rotational friction to the fuse 4. Mechanical damage ensures the normal service life of...

Embodiment 2

[0018] The difference between embodiment 2 and embodiment 1 is that the radial section of the fixing hole is elliptical, and the clamping column is an elliptical clamping column. This design provides a cross-sectional shape different from polygonal, which can achieve Same effect.

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Abstract

The invention provides a drop-out fuse. The drop-out fuse comprises a lower moving contact, a bolt and a fuse wire, wherein the lower moving contact is provided with a fixing hole, the bolt is arranged in the fixing hole, the fuse wire is arranged on the bolt, the radial cross section of the fixing hole is in a non-circular shape, a clamping column corresponding to the shape of the fixing hole is arranged between a bolt head and a screw rod of the bolt, the fuse wire is coiled on the clamping column, and the clamping column is inserted in the fixing hole. According to the drop-out fuse provided by the invention, through the bolt which is provided with the clamping column having the non-circular radial cross section and the matched fixing hole, the situation that the fuse wire is subjected to mechanical damage due to rotating friction can be avoided, and the normal use of the fuse wire is ensured; and the non-circular shape can be a square shape, and processing and manufacturing are easy.

Description

technical field [0001] The invention relates to a drop-out fuse, in particular to a drop-out fuse. Background technique [0002] Drop-out fuses are mainly used for switching of distribution transformers and protection of equipment. When installing the fuse, one end of the fuse needs to be wound around the bolt of the lower moving contact, and then the bolt is tightened to fix the fuse. However, in the process of tightening the bolts, the fuse will rotate with the bolt due to friction, which can easily cause mechanical damage to the fuse, resulting in abnormal disconnection of the fuse during operation, which directly leads to abnormal power supply Or interruption, resulting in power outages, which brings great inconvenience to residents' work and life. Therefore, the problem that fuses are susceptible to mechanical damage during installation has always troubled electric maintenance personnel. [0003] In order to solve the above existing problems, people have been seeking...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H85/54
Inventor 于溪波张继红
Owner STATE GRID CORP OF CHINA
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