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Fuse for AC high voltage current limiting fuse and its structure

A fuse and current-limiting technology, which is applied to electrical components, circuits, emergency protection devices, etc., can solve the problems of not destroying the capillary space structure of quartz sand, low operating temperature and power consumption, and small thermal resistance value, etc., to achieve Eliminate unqualified products and product explosions, reduce product costs, and reduce requirements

Inactive Publication Date: 2008-10-08
王有杰 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems existing in the above-mentioned prior art, the present invention designs a melt and its structure for an AC high-voltage current-limiting fuse after decades of careful research, which solves the problem of high melt price, poor carrying capacity, and problems in the prior art. The problem of large power consumption; and the melting point of the present invention can reach 760 degrees, the vaporization value is 1400 degrees, the resistance value of the cold state is slightly larger than that of silver, and the resistance value of the hot state is smaller than that of silver; No overload current can damage the capillary space structure of quartz sand, it has good and stable breaking ability, low operating temperature and power consumption, and the performance is fully up to standard

Method used

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  • Fuse for AC high voltage current limiting fuse and its structure

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Effect test

Embodiment 1

[0025] The melt for the AC high-voltage current-limiting fuse of the present invention is made of the following materials in proportions by weight, copper: tin: phosphorus: alum = 50:1:0.5:0.1.

[0026] As shown in Figure 1, the structure of the melt for AC high-voltage current-limiting fuses is: a base body 1, two sides of the base body 1 are provided with equal-length arcs 2 to form an equal-length narrow neck 3, and the base body 1 is provided with a larger than equal-length arc 2 The concave arc 4 of the length constitutes the long narrow neck 5, and the long narrow neck 5 is arranged between the equal length narrow necks 3 at intervals, and the second long narrow neck 7 is arranged between the long narrow neck 5 and the equal length narrow neck 5, which is used for transformer protection .

Embodiment 2

[0028] The melt for the AC high-voltage current-limiting fuse of the present invention is made of the following materials in proportions by weight, copper: tin: phosphorus: alum = 120:8:5:2.

[0029] As shown in Figure 2, the structure of the melt for AC high-voltage current-limiting fuses is as follows: it includes a base body 1, and equal-length circular arcs 2 are arranged on both sides of the base body 1 to form an equal-length narrow neck 3, and a larger than equal-length arc 2 is set on the base body 1. The concave arc 4 of the length forms the long narrow neck 5, and the long narrow neck 5 is arranged between the equal length narrow necks 3 at intervals, and the second long narrow neck 7 is arranged between the long narrow neck 5 and the equal length narrow neck 5; The narrow neck is correspondingly provided with a punching hole 6, and the length of the punching hole 6 corresponding to the long narrow neck 5 is greater than the length of other punching holes, and is used...

Embodiment 3

[0031] The melt for the AC high-voltage current-limiting fuse of the present invention is made of the following materials in proportions by weight, copper: tin: phosphorus: alum = 85: 4.5: 2.7: 1.1.

[0032] The structure of the melt used in the AC high-voltage current-limiting fuse is the same as in Embodiment 1, and is used for transformer protection.

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Abstract

The fuse body in use for 6KV-1000KV AC high voltage current limiting fuse is produced by using materials according to weight portions: red copper : stannum : phosphor : alum = 50-120:1-8:0.5-5:0.1-2. Structure of the fuse body includes basal body and isometric narrow neck composed of isometric circular arcs setup on two sides of the basal body. Long narrow neck composed of concave arc longer than length of isometric circular arc is setup on the basal body. Long narrow necks with intervals are setup between isometric narrow necks. Performances including carrying capacity, cold resistance, hot resistance, and on / off capability of the fuse body are better than performances of fuse body prepared from silver. Specially, it is better result by using overload current under opening mode. Advantages are: low price being as 5% cost of silver, reduced difficulty for assembling technique, lowered requirement on quartz sand and outer porcelain tube, and power consumption.

Description

technical field [0001] The invention relates to a melt used in a fuse, in particular to a melt used for a 6KV-1000KV AC high-voltage current-limiting fuse and its structure. Background technique [0002] At present, silver is used in the melt of AC high-voltage fuses in my country and the world. Since fuses are disposable and silver is the natural currency, every time a fuse is blown, a lot of money is wasted. Now our country consumes more than 6 million fuses every year, so it costs more than 240 million yuan, which is a waste to the country, the people, and the power grid. In addition, the fuse made of silver melt has a good ability when the breaking method adopts a strong short-circuit current; when the breaking method adopts a small short-circuit current, the effect starts to be poor; If no additional device is added, it is impossible to realize breaking; it is easy to cause an explosion. In my country, dozens to hundreds of fuses explode every year, causing losses of h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H85/06H01H85/08
Inventor 王有杰
Owner 王有杰
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