CN2929951Y - Vacuum overload fuse - Google Patents
Vacuum overload fuse Download PDFInfo
- Publication number
- CN2929951Y CN2929951Y CN 200620087329 CN200620087329U CN2929951Y CN 2929951 Y CN2929951 Y CN 2929951Y CN 200620087329 CN200620087329 CN 200620087329 CN 200620087329 U CN200620087329 U CN 200620087329U CN 2929951 Y CN2929951 Y CN 2929951Y
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- CN
- China
- Prior art keywords
- vacuum
- utility
- overload fuse
- current
- model
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a vacuum overload fuse for protecting electric force equipment comprising a receiving terminal and a weld flux, wherein the weld flux is sealed in the vacuum cavity of an insulating porcelain bushing, and the two ends of the weld flux are connected with the external receiving terminal through a conducting rod. A metal screening can is provided between the weld flux and the insulating porcelain bushing. The utility model vacuum overload fuse combines the fusing technique and the vacuum technique, has compact structure and small bulk. When the current reaches to the stated fusing current, the weld flux fuses to protect the electric force equipment. The action responses quickly, and the reliability is good. To any anticipated current, after the vacuum overload fuse melts to strike in the weld flux, the vacuum overload fuse extinguishes when the first time or the second time current is zero. No excess voltage is produced, and the length of the weld flux is a little short. The utility model has the advantages of small resistance and power consumption, economy and endurance, no danger of explosion, no opening and closing noise, small bulk, light weight and good flexibility. The utility model is not limited by installing part, and can be used widely.
Description
Technical field
The utility model relates to a kind of vacuum overload fuse, is used to protect power equipment.
Background technology
Fuse generally is vertically mounted on the top or the bottom of on-load switch.Horizontal arrangement is directly over vacuum interrupter, and fuse has one of striker and rectifies the tripping mechanism that triggers facing to for striker.The electric current that breaks down in circuit, during as short circuit, the striker by fuse inside triggers tripping mechanism, drives operating mechanism, makes vacuum interrupter disconnect.Because fuse is arranged vertically, and makes whole combined electrical apparatus volume big, complex structure.In big-and-middle-sized equipment; usually on-load switch and existing current limiting fuse are used in combination; it is reliable that short-circuit protection is finished by current limiting fuse; but come overload protection with on-load switch; generally be to finish by relay; need the regular hour just to move simultaneously, sensitive inadequately, poor reliability.
Summary of the invention
The purpose of this utility model is to provide a kind of vacuum overload fuse, compact conformation, and volume is little, is active in one's movements good reliability.
Vacuum overload fuse described in the utility model has terminals and melt, it is characterized in that melt sealant in the vacuum chamber of insulated porcelain sleeve, and the melt two ends connect outside terminals by contact rod.
Between melt and insulated porcelain sleeve, metallic shield is set, can in the drop-out current process, stops that the metallic vapour that melt produces is ejected into the high alumina ceramic inside pipe wall, avoids the short circuit or the leaky that cause.
The vacuum degree control of vacuum chamber is 5 * 10
-4Handkerchief.
The preferred non-oxygen copper bar of contact rod.
Melt is fuse-link, and multiple, preferably commonly used corronil melt is arranged, and for small-sized vacuum overload fuse, can use Contra wire, generally is installed in the various measuring instruments, and precision instrument is carried out reliably protecting; For in, large-scale vacuum overload fuse, can use the corronil band, that also can do is longer slightly, is used for medium-sized and large electric appliances equipment.Protect with vacuum overload fuse, after receiving overload current, will not have too much delay time error, be active in one's movements along with the curve characteristic direct action of its time-electric current.
Vacuum overload fuse of the present utility model; has very steep time-current chracteristic; and do not have aging and the non-resistance variation; can set specification according to the size of rated current; small-sized rated current can be divided 0.1A; 0.25A; 0.315A; 0.5A; 1.0A; 2.0A; 2.5A; 3.15A etc. specification; the rated current of medium specification has 6.3A respectively; 10A; 16A; 20A; 25A; 31.5A; 40A; 50A; 63A; 80A etc.; the rated current of large-scale specification has 100A respectively; 125A; 160A; 200A; 250A; 315A; 500A etc.; can set melt and reliably fuse reaching certain value, play a protective role.
The utility model vacuum overload fuse, the technology that will fuse and vacuum technique combine, compact conformation, volume is little, and when electric current reached the setting blowout current, protection, movement response sensitivity, good reliability were played in melt fusing.And vacuum overload fuse is for any prospective current, in melt after the fusing starting the arc, extinguishes when current over-zero for the first time or for the second time, no overvoltage produces, and melt length is shorter, and resistance is little, power consumption is little, economy and durability, no explosion hazard, do not have and cut-off noise, volume is little, and is in light weight, flexible, not limited by the installation position, application adaptability is wide.
Description of drawings
Fig. 1, the utility model embodiment 1 structural representation.
Fig. 2, the utility model embodiment 2 structural representations.
Fig. 3, time-current characteristic curve reference diagram of the present utility model.
1,5,9,13, terminals 2,10, insulated porcelain sleeve 3,11, metallic shield 4,8,12,16, contact rod 6,14, melt 7,15, vacuum chamber among the figure:.
Embodiment
Below in conjunction with the embodiment accompanying drawing the utility model is described further.
As shown in Figure 1, vacuum overload fuse described in the utility model is the product of small-sized specification, and melt (Contra wire) 6 is sealed in the vacuum chamber 7 of insulated porcelain sleeve 2, and the vacuum degree of vacuum chamber 7 is 5 * 10
-4Handkerchief is provided with metallic shield 3 between melt 6 and the insulated porcelain sleeve 2, and melt 6 two ends connect outside terminals 1,5 by contact rod (non-oxygen copper bar) 8,4.Terminals 1,5 can be processed into the arbitrary shape that is fit to installation as required.
As shown in Figure 2, vacuum overload fuse described in the utility model is the product of medium specification and large-scale specification, and length is longer, and melt (corronil band) 14 is sealed in the vacuum chamber 15 of insulated porcelain sleeve 10, and the vacuum degree of vacuum chamber 15 is 5 * 10
-4Handkerchief is provided with metallic shield 11 between melt 14 and the insulated porcelain sleeve 10, and melt 14 two ends connect outside terminals 9,13 by contact rod (non-oxygen copper bar) 16,12.Terminals 9,13 can be processed into the arbitrary shape that is fit to installation as required.
As shown in Figure 3, the utility model vacuum overload fuse has very steep time-current chracteristic, and its rated current meets the scope of medium rated current, the diagram rated current is 50A, when electric current is 1.2 times rated value, i.e. 50A * 1.2=60A, but long-term work; When electric current is 1.5 times rated value, i.e. 50A * 1.5=75A, the forearc fusing time is 70 seconds; When electric current is 1.9 times rated value, i.e. 50A * 1.9=95A, the forearc fusing time was less than 30 seconds; When electric current is 2 times rated value, i.e. 50A * 2=100A, the forearc fusing time is 6 seconds.Can set specification according to the size of rated current, and can guarantee energy long-term work under 1.2 times of rated current, can fusing reliably in 30 second time when reaching 1.9 times of rated current.Protect with vacuum overload fuse, after receiving overload current, will not have too much delay time error along with the curve characteristic direct action of its time-electric current.
Claims (4)
1, a kind of vacuum overload fuse has terminals and melt, it is characterized in that melt sealant in the vacuum chamber of insulated porcelain sleeve, and the melt two ends connect outside terminals by contact rod.
2, vacuum overload fuse according to claim 1 is characterized in that between melt and the insulated porcelain sleeve metallic shield being set.
3, vacuum overload fuse according to claim 1 and 2, the vacuum degree control that it is characterized in that vacuum chamber is 5 * 10
-4Handkerchief.
4, vacuum overload fuse according to claim 3 is characterized in that contact rod is a non-oxygen copper bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620087329 CN2929951Y (en) | 2006-07-26 | 2006-07-26 | Vacuum overload fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620087329 CN2929951Y (en) | 2006-07-26 | 2006-07-26 | Vacuum overload fuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2929951Y true CN2929951Y (en) | 2007-08-01 |
Family
ID=38308323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620087329 Expired - Fee Related CN2929951Y (en) | 2006-07-26 | 2006-07-26 | Vacuum overload fuse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2929951Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101901717A (en) * | 2010-07-06 | 2010-12-01 | 曾泓瑞 | Vacuum overcurrent fuse protecting device for high-voltage power supply system and low-voltage power supply system |
| CN103247497A (en) * | 2013-05-24 | 2013-08-14 | 杨光 | Vacuum fuse and production method thereof |
| CN104241059A (en) * | 2014-09-18 | 2014-12-24 | 江苏科兴电器有限公司 | High-voltage fuse with shielding function |
-
2006
- 2006-07-26 CN CN 200620087329 patent/CN2929951Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101901717A (en) * | 2010-07-06 | 2010-12-01 | 曾泓瑞 | Vacuum overcurrent fuse protecting device for high-voltage power supply system and low-voltage power supply system |
| CN101901717B (en) * | 2010-07-06 | 2012-10-31 | 曾泓瑞 | Vacuum overcurrent fuse protecting device for high-voltage power supply system and low-voltage power supply system |
| CN103247497A (en) * | 2013-05-24 | 2013-08-14 | 杨光 | Vacuum fuse and production method thereof |
| CN103247497B (en) * | 2013-05-24 | 2015-05-13 | 杨光 | Vacuum fuse and production method thereof |
| CN104241059A (en) * | 2014-09-18 | 2014-12-24 | 江苏科兴电器有限公司 | High-voltage fuse with shielding function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070801 Termination date: 20150726 |
|
| EXPY | Termination of patent right or utility model |