CN201421816Y - Fuse body for low voltage fuses - Google Patents
Fuse body for low voltage fuses Download PDFInfo
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- CN201421816Y CN201421816Y CN2009200763568U CN200920076356U CN201421816Y CN 201421816 Y CN201421816 Y CN 201421816Y CN 2009200763568 U CN2009200763568 U CN 2009200763568U CN 200920076356 U CN200920076356 U CN 200920076356U CN 201421816 Y CN201421816 Y CN 201421816Y
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Abstract
The utility model discloses a fuse body for low voltage fuses, comprising a fuse tube, a fusible body, an arc extinguishing medium, one pair of cover plates, one pair of contact blades and indicatingcomponents. The fusible body is a copper tape of an effective width. A bead weld groove traversing the width of the fusible body is arranged in the middle of the fusible body across the long direction, and the bead weld groove is stacked with soldering tin. One group of kidney-shaped holes, the first group of rhombus holes and the second group of rhombus holes are respectively symmetrically arranged on the fusible body at the two sides of the center line across the long direction. The group of kidney-shaped holes comprises a plurality of horizontal kidney-shaped holes in the same structure andsize. The number of rhombus holes in the first group of rhombus holes and the second group of rhombus holes is the same with the number of kidney-shaped holes in the group of kidney-shaped holes, andthe rhombus holes are in the same structure and size. The fusible body in the fuse body for low voltage fuses has the advantages of easy fusion when overloaded and relative good radiation condition.
Description
Technical field
The utility model relates to a kind of melt that is used for low-tension fuse, and particularly a kind of to be used for specified alternating voltage be 690V, and rated current is 1600A, and specified breaking capacity is the fuse-link of the fuse of 100kA.
Background technology
Fuse is a kind of electrical equipment of simply and effectively protecting.In circuit, mainly play the short-circuit protection effect.Mainly form by the insulated tube (insulating base) of melt and installation melt.The shape of melt is divided into thread and banded two kinds, and banded melt will be offered some through holes usually from the teeth outwards, the effect that these through holes play heat radiation and produce the fracture muscle.The shape of these through holes is circular or some irregular shapes substantially, and the fracture muscle of the gap in these holes during as the short circuit fault needs according to the electric current and voltage grade through accurate Calculation.During use, melt is serially connected with in the protected circuit, and when circuit was short-circuited fault, melt was divided deenergizing by instantaneous fusing, plays a protective role.
In recent years, China's wind-powered electricity generation industry has entered fast developing lane, and wind energy resources reaches 2.5 hundred million kW on the Chinese available road.Wind power system mainly uses fuse as electic protection at present, and therefore to the performance index of fuse, the requirement of parameter grade is also more and more higher.
The general voltage of the low-tension fuse of prior art is 500V, and electric current is 1250A, and this requires just can not satisfy than higher occasion user's demand at some to current protection.At the needs of this respect, personnel demand researching and developing alternating voltage urgently and can reach 690V in the industry, and electric current reaches as high as the fuse of 1600A, and relatively core component one melt to fuse also will redesign.
Summary of the invention
The purpose of this utility model is in order to overcome the deficiencies in the prior art, a kind of fuse-link that is used for low-tension fuse to be provided, and it has the advantage that is easy to disjunction when overload, and radiating condition is better relatively.
The technical scheme that realizes above-mentioned purpose is: a kind of fuse-link that is used for low-tension fuse, comprise tube wall be provided with the fusion tube of radial perforation, be located at the fusion tube inner chamber melt, be filled in arc-extinguishing medium in the fusion tube inner chamber, a pair ofly be sealed on the two ends of fusion tube and the cover plate that its inner surface is connected with the two ends of melt respectively, a pair of contact knife and that is connected on the cover plate outer surface is plugged on the indication piece in the fusion tube perforation, described melt is one to have the copper strips of effective width, wherein
Be provided with a vertical built-up welding groove of striding the melt width in its length central authorities on the upper surface of described melt, and in this built-up welding groove, pile with scolding tin;
Offer one group of mounting hole, first group of diamond hole and second group of diamond hole respectively symmetrically successively in its length center line both sides on the surface of described melt, described one group of mounting hole contains several structures and measure-alike horizontal mounting hole, the quantity of contained diamond hole is identical with the quantity of contained mounting hole in one group of mounting hole respectively in described first group of diamond hole and the second group of diamond hole, and the structure of these diamond holes and measure-alike;
All to offer with the equidistant mode of length center line of described melt and to arrange apart from the mode that is δ 1 with longitudinal separation, the center line of this group mounting hole is L1 at a distance of the distance of the length center line of melt to several mounting holes in described one group of mounting hole;
All to offer with the equidistant mode of length center line of described melt and to arrange apart from the mode that is δ 2 with longitudinal separation, the center line of this first group of diamond hole is L2 at a distance of the distance of the center line of described one group of mounting hole to several diamond holes in described first group of diamond hole;
All to offer with the equidistant mode of described length center line and to arrange apart from the mode that is δ 2 with longitudinal separation, the center line of this second group of diamond hole is L3 at a distance of the distance of the center line of described first group of diamond hole to several diamond holes in described second group of diamond hole.
The above-mentioned fuse-link that is used for low-tension fuse, wherein, described δ 2＞δ 1; Described L3＞L1＞L2.
The above-mentioned fuse-link that is used for low-tension fuse, wherein, the lateral dimension of the diamond hole on the described melt is greater than its longitudinal size; The lateral dimension of the mounting hole on the described melt is greater than the lateral dimension of diamond hole.
The above-mentioned fuse-link that is used for low-tension fuse, wherein, the quantity of one group of mounting hole on the described melt is three.
The above-mentioned fuse-link that is used for low-tension fuse, wherein, the cross section of the built-up welding groove on the described melt is V-shape.
The technical scheme that is used for the fuse-link of low-tension fuse of the present utility model adopts and offer diamond hole and the form that the long waist shaped hole combines on the surface of melt, make melt be easy to disjunction when overload, and the radiating condition of diamond hole is better relatively.The material of melt adopts the fine copper band, and the centre scribbles Xi Qiao, can produce the excellent metallurgical effect, is easy to disjunction, and the electric current and voltage grade that this fuse-link can reach is higher, can reach 690V, and 1600A has filled up blank both domestic and external, has reached a new height.A kind of fuse-link that is used for low-tension fuse of the present utility model also is applicable to the fuse of other grade.
Description of drawings
Fig. 1 is the structural representation that is used for the fuse-link of low-tension fuse of the present utility model;
Fig. 2 is the structural representation that is used for the fuse-link melt of low-tension fuse of the present utility model;
Fig. 3 is the sectional view of the melt of the fuse-link that is used for low-tension fuse of the present utility model.
Embodiment
In order to understand the technical solution of the utility model better, below by embodiment particularly and be described in detail in conjunction with the accompanying drawings:
See also Fig. 1, the fuse-link that is used for low-tension fuse of the present utility model comprises fusion tube 1, melt 2, arc-extinguishing medium 3, a pair of cover plate 4, a pair of contact knife 5 and indication piece 6, wherein, fusion tube 1 is an insulator, offers a radial perforation 10 on its both ends open and its tube wall; Melt 2 is located at fusion tube 1 inner chamber; Arc-extinguishing medium 3 is a quartz sand, and it is filled in the inner chamber of fusion tube 1; Two ends and its inner surface that cover plate 4 is sealed on fusion tube 1 are connected with the two ends of melt 2 respectively; Contact knife 3 is connected on the outer surface of cover plate 4, is used for being connected with external circuit; Indication piece 6 is plugged in fusion tube 1 perforation 10, is used for reflecting the situation of cut-offfing of fusion tube 1 inner chamber melt 2.
See also Fig. 2 and Fig. 3 again, the fuse-link that is used for low-tension fuse of the present utility model, wherein melt 2 is one to have the copper strips of effective width, wherein,
Be provided with a vertical built-up welding groove 20 of striding its width in its length central authorities on the upper surface of melt 2, the cross section of built-up welding groove 20 is V-shape, piles with scolding tin in this built-up welding groove 20;
Offer one group of mounting hole 21, first group of diamond hole 22 and second group of diamond hole 23 on the surface of melt 2 respectively symmetrically successively in the both sides of its length center line 100.1 contains three structures and measure-alike horizontal mounting hole in one group of mounting hole 2, the quantity of contained diamond hole is identical with the quantity of contained mounting hole in one group of mounting hole 21 respectively in first group of diamond hole 22 and the second group of diamond hole 23, and the structure of these diamond holes and measure-alike;
The lateral dimension of diamond hole is greater than its longitudinal size; The lateral dimension of mounting hole is greater than the lateral dimension of diamond hole;
All to offer with length center line 100 equidistant modes of melt 2 and to be that the mode of δ 1 is arranged with the longitudinal separation distance, the center line 200 of this group mounting hole 21 apart distance of the length center line 100 of melt 2 is L1 to three mounting holes in one group of mounting hole 21;
All to offer with length center line 100 equidistant modes of melt 2 and to be that the mode of δ 2 is arranged with the longitudinal separation distance, the center line 300 of this first group of diamond hole 22 is L2 at a distance of the distance of the center line 200 of one group of mounting hole 21 to three diamond holes in first group of diamond hole 22;
All to offer with length center line 100 equidistant modes of melt 2 and to be that the mode of δ 2 is arranged with the longitudinal separation distance, the center line 400 of this second group of diamond hole 23 is L3 at a distance of the distance of the center line 300 of first group of diamond hole 22 to each and every one diamond hole of in second group of diamond hole 23 three.
Wherein, δ 2＞δ 1, L3＞L1＞L2.
The fuse-link that is used for low-tension fuse of the present utility model, when circuit is short-circuited fault, the heat that short circuit current produces makes the scolding tin fusing in advance in the built-up welding groove 20, tin after the fusing overflows built-up welding groove 20 and flows to melt 2 surfaces and flow to 21 distances of one group of mounting hole the formed fracture in gap that is δ 1, can produce the excellent metallurgical effect, make fracture quicken the fusing fracture.The overload of bearing as full range fuse is cut-off melt 2, and principle is shared in the utilization series connection, has reduced the arc energy that cut-offs of each fracture, and it is smooth and easy to have guaranteed that the metallic vapour of starting the arc when fuse-link cut-offs is got rid of, and finally guarantees the security performance of cut-offfing of fuse.
It is 690V that the fuse-link that is used for low-tension fuse of the present utility model is suitable for rated voltage, rated current is 1600A, specified breaking capacity is the fuse of 100kA, it adopts and offers the form that diamond hole combines with the long waist shaped hole at bath surface, make melt when overload, be easy to disjunction, and the radiating condition of diamond hole is better relatively.The material of melt adopts the fine copper band, is easy to disjunction, and the fuse-link that is used for low-tension fuse of the present utility model also is applicable to the fuse of other grade.
Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the utility model, and be not to be used as qualification of the present utility model, as long as in connotation scope of the present utility model, all will drop in claims scope of the present utility model variation, the modification of the above embodiment.
Claims (5)
1. fuse-link that is used for low-tension fuse, comprise tube wall be provided with the fusion tube of radial perforation, be located at the fusion tube inner chamber melt, be filled in arc-extinguishing medium in the fusion tube inner chamber, a pair ofly be sealed on the two ends of fusion tube and the cover plate that its inner surface is connected with the two ends of melt respectively, a pair of contact knife and that is connected on the cover plate outer surface is plugged on the indication piece in the fusion tube perforation, described melt is one to have the copper strips of effective width, it is characterized in that
Be provided with a vertical built-up welding groove of striding the melt width in its length central authorities on the upper surface of described melt, and in this built-up welding groove, pile with scolding tin;
Offer one group of mounting hole, first group of diamond hole and second group of diamond hole respectively symmetrically successively in its length center line both sides on the surface of described melt, described one group of mounting hole contains several structures and measure-alike horizontal mounting hole, the quantity of contained diamond hole is identical with the quantity of contained mounting hole in one group of mounting hole respectively in described first group of diamond hole and the second group of diamond hole, and the structure of these diamond holes and measure-alike;
All to offer with the equidistant mode of length center line of described melt and to arrange apart from the mode that is δ 1 with longitudinal separation, the center line of this group mounting hole is L1 at a distance of the distance of the length center line of melt to several mounting holes in described one group of mounting hole;
All to offer with the equidistant mode of length center line of described melt and to arrange apart from the mode that is δ 2 with longitudinal separation, the center line of this first group of diamond hole is L2 at a distance of the distance of the center line of described one group of mounting hole to several diamond holes in described first group of diamond hole;
All to offer with the equidistant mode of described length center line and to arrange apart from the mode that is δ 2 with longitudinal separation, the center line of this second group of diamond hole is L3 at a distance of the distance of the center line of described first group of diamond hole to several diamond holes in described second group of diamond hole.
2. the fuse-link that is used for low-tension fuse according to claim 1 is characterized in that, described δ 2＞δ 1; Described L3＞L1＞L2.
3. the fuse-link that is used for low-tension fuse according to claim 1 is characterized in that the lateral dimension of the diamond hole on the described melt is greater than its longitudinal size; The lateral dimension of the mounting hole on the described melt is greater than the lateral dimension of diamond hole.
4. the fuse-link that is used for low-tension fuse according to claim 1 is characterized in that, the quantity of one group of mounting hole on the described melt is three.
5. the fuse-link that is used for low-tension fuse according to claim 1 is characterized in that, the cross section of the built-up welding groove on the described melt is V-shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200763568U CN201421816Y (en) | 2009-06-16 | 2009-06-16 | Fuse body for low voltage fuses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200763568U CN201421816Y (en) | 2009-06-16 | 2009-06-16 | Fuse body for low voltage fuses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201421816Y true CN201421816Y (en) | 2010-03-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200763568U Expired - Lifetime CN201421816Y (en) | 2009-06-16 | 2009-06-16 | Fuse body for low voltage fuses |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201421816Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101923997B (en) * | 2009-06-16 | 2012-05-23 | 上海电器陶瓷厂有限公司 | Fuse link for low voltage fuse |
| CN104900460A (en) * | 2015-06-09 | 2015-09-09 | 广东电网有限责任公司电力科学研究院 | Low-voltage current limiting rapid fuse |
| CN105428178A (en) * | 2015-12-29 | 2016-03-23 | 上海电器陶瓷厂有限公司 | Melt for DC fuse link |
-
2009
- 2009-06-16 CN CN2009200763568U patent/CN201421816Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101923997B (en) * | 2009-06-16 | 2012-05-23 | 上海电器陶瓷厂有限公司 | Fuse link for low voltage fuse |
| CN104900460A (en) * | 2015-06-09 | 2015-09-09 | 广东电网有限责任公司电力科学研究院 | Low-voltage current limiting rapid fuse |
| CN105428178A (en) * | 2015-12-29 | 2016-03-23 | 上海电器陶瓷厂有限公司 | Melt for DC fuse link |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100310 Effective date of abandoning: 20090616 |