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Composite melt for fuse and fuse

A fuse and melt technology, applied in electrical components, circuits, emergency protection devices, etc., can solve the problems of slow heat accumulation in the narrow diameter of the melt, unfavorable insulation performance, lap bonding and adhesion of fuse points, etc., and shorten the arc extinguishing time. , Conducive to arc extinguishing and rigidity enhancement effect

Pending Publication Date: 2021-06-04
XIAN ZHONGRONG ELECTRIC CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. The narrow melt diameter of the fuse is relatively weak, and it is easy to be damaged or deformed during the production process
[0005] 2. When the fuse is blown in multiple rows of narrow diameters, due to the relatively small gap at the narrow diameter melting point, there will be overlap and adhesion of the melting points between different narrow diameters, and the arc cannot be extinguished quickly, which is not conducive to the insulation performance after breaking
[0006] 3. Generally, the narrow-diameter melt of the general fuse is slow to accumulate heat at a lower multiple current, which leads to delay in fusing, long fusing time, and rapid protection cannot be achieved.

Method used

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  • Composite melt for fuse and fuse
  • Composite melt for fuse and fuse
  • Composite melt for fuse and fuse

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Embodiment Construction

[0023] With regard to the above technical solutions, preferred embodiments are given and described in detail in conjunction with the drawings. in:

[0024] Composite melt, see figure 1 and figure 2 , including a conductive melt 2, the melt 2 is a long sheet structure, at least one narrow diameter 3 is arranged on the melt 2, and a layer of insulation covering the narrow diameter is provided at the outer peripheral surface of the narrow diameter 3 Protective layer 4, the two ends of the melt are located outside the insulating protective layer. When there are multiple narrow diameters on the melt, if the distance between each narrow diameter is relatively wide, an insulating protective layer can be provided at each narrow diameter; An insulating protective layer is provided; or a plurality of slits are grouped, and an insulating protective layer is provided at each group of slits.

[0025] In order to better reduce the volume of the composite melt, it is optimal that the in...

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Abstract

The invention provides composite melt for a fuse and the fuse. The composite melt is provided with a narrow diameter or a metallurgical effect point, and the narrow diameter or the metallurgical effect point is coated with an insulating protective layer. The composite melt can be used as the fuse melt. According to the composite melt and the fuse, the melt is not prone to deformation, fusing is faster, working reliability is higher, and meanwhile the rated current and the breaking capacity of the fuse are improved.

Description

technical field [0001] The invention relates to the field of electric power control, in particular to the structure of fuses used in high and low voltage power distribution systems, control systems, and electric equipment. Background technique [0002] Fuses are widely used in high and low voltage power distribution systems and control systems as well as electrical equipment as protection devices. There are many types of fuses. Currently, the structures of thermal fuses commonly used on the market include contact blades, glands, melts, arc extinguishing media, and porcelain tubes. The working principle is: when the current in the line exceeds the specified value, that is, when the fault current occurs, the line current passes through the melt through the contact knife, and uses the current heat accumulation effect to make the current sensing point (narrow neck) set by the melt within a certain period of time. Melting breaks and extinguishes the arc, thereby safely interrupt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H85/055
CPCH01H85/055
Inventor 段少波王欣石晓光戈西斌
Owner XIAN ZHONGRONG ELECTRIC CO LTD
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