CN1790586A - Vacuum mixing type current-limiting fuse - Google Patents
Vacuum mixing type current-limiting fuse Download PDFInfo
- Publication number
- CN1790586A CN1790586A CN 200510061978 CN200510061978A CN1790586A CN 1790586 A CN1790586 A CN 1790586A CN 200510061978 CN200510061978 CN 200510061978 CN 200510061978 A CN200510061978 A CN 200510061978A CN 1790586 A CN1790586 A CN 1790586A
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- Prior art keywords
- vacuum
- fuse
- current
- limiting fuse
- mixing type
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Abstract
The invention discloses vacuum composite current limiting fuse that comprises a small current limiting fuse connected with a vacuum fuse in series. Wherein, using oxygen-free copper wire as fuse-elements for said vacuum fuse to weld on oxygen-free copper conductive rods on ends outwardly in vacuum ceramic tube with metal shield can; selecting quartz glass rod as bracket for fuse wire of said small current limiting fuse to tight roll the bracket with 1cm. The vacuum fuse completes the switch for small overload current while the small current limiting fuse for large overload and short-circuit current; specially, it works long time on 1.2 times rated current while fuses and breaks the circuit within 30s when 1.9 times rated current.
Description
Technical field
The present invention relates to a kind of protection voltage transformer vacuum mixing type current-limiting fuse.
Background technology
The present both at home and abroad fuse used of the protection voltage transformer of producing, all single employing as melt, can not guarantee long-term work under 1.2 times of rated current, fusing in the following 30 second time of 1.9 times of rated current by filamentary silver or other alloy materials.
Summary of the invention
The objective of the invention is to provide for the deficiency that solves above-mentioned technology under 1.2 times of rated current of a kind of assurance can long-term work, 1.9 doubly can in 30 second time, fuse reliably under the rated current, and when big overload current and short circuit current, a kind of vacuum mixing type current-limiting fuse that cut-offs by the small-sized current limiting fuse.
In order to achieve the above object, a kind of vacuum mixing type current-limiting fuse that the present invention is designed, it comprises the small-sized current limiting fuse, is serially connected with vacuum fuse on the small-sized current limiting fuse.Described vacuum fuse by copper free wire as melt, be welded on the oxygen-free copper contact rod at two ends and outwards draw, melt sealant is in the vacuum ceramic pipe, be provided with metallic shield in the vacuum ceramic pipe, be directly injected to ceramic inner walls to be blocked in the metallic vapour that melt produces in the drop-out current process, cause short circuit.The support of fuse can be a quartz glass bar in the described small-sized current limiting fuse, in middle 1 cm range of the close support around quartz glass bar of fuse.Described vacuum ceramic pipe can be 35 millimeters of diameter of phi, 45 millimeters of length, and the vacuum degree of vacuum fuse is 3 * 10
-4Handkerchief.The diameter of described oxygen-free copper contact rod can be 8 millimeters.
The resulting a kind of vacuum mixing type current-limiting fuse of the present invention, vacuum fuse finish that small offence is current-carrying cut-offs; The small-sized current limiting fuse is finished cut-offfing of big overload and short circuit current; Particularly energy long-term work when 1.2 times of rated current, and can in 30 second time, fuse and cut-off this electric current under 1.9 times of rated current, when running into big overload current and short circuit current, can reliable current limliting cut-off simultaneously.
Description of drawings
Fig. 1 is an embodiment of the invention structural representation;
Fig. 2 is the structural representation of vacuum fuse;
Fig. 3 is the structural representation of small-sized current limiting fuse;
Embodiment
The invention will be further described in conjunction with the accompanying drawings below by embodiment, but following embodiment does not limit content of the present invention.
Embodiment 1
As shown in Figure 1, a kind of vacuum mixing type current-limiting fuse that present embodiment is described, it comprises small-sized current limiting fuse 1, on small-sized current limiting fuse 1, be serially connected with vacuum fuse 2, as shown in Figure 2, described vacuum fuse 2, is welded on the oxygen-free copper contact rod 4 at two ends and outwards draws as melt 3 by copper free wire, melt 3 is sealed in the vacuum ceramic pipe 5, is provided with metallic shield 6 in the vacuum ceramic pipe 5.Described vacuum ceramic pipe 5 is 35 millimeters of diameter of phi, 45 millimeters of length, and the vacuum degree of vacuum fuse is 3 * 10
-4Handkerchief, the diameter of described oxygen-free copper contact rod 4 are 8 millimeters.
As shown in Figure 3, the support 8 of fuse 7 is quartz glass bars in the described small-sized current limiting fuse 1, and fuse 7 is close in support 8 middle 1 cm range of quartz glass bar.In force, as fuse 7, on quartz glass bar, jar has quartz sand 10 as arc-extinguishing medium in the earthenware 9 with the fine silver silk, and all the other structures are identical with general current limiting fuse.The small-sized current limiting fuse is used for cut-offfing overload current and the short circuit current greater than vacuum fuse.
A kind of vacuum mixing type current-limiting fuse that present embodiment provides, its rated current can be divided into 0.5A, 1A, 1.5A, 2A and five grades of 3.15A according to the difference of fine silver filament diameter, also can design less than 0.5A with greater than the rated current grade of 3.15A according to concrete needs.
The crosspoint of the time-electric current after the series connection, the crosspoint is 3A when rated current is 0.5A, the crosspoint is 5.2A when rated current is 1A, and the crosspoint is 7A when rated current is 1.5A, when rated current is 2A the crosspoint be 10A when working as rated current and being 3.15A the crosspoint be 14A.
When the fault current value more than the crosspoint, belong to low overload current scope, cut-off by vacuum fuse; When the fault current value below the crosspoint, belong to big overload current or short circuit current scope, cut-off by the small-sized current limiting fuse.
The present invention proves practicable through test of many times, and current also do not have this product both at home and abroad, does not also work up the standard of this fuse protection voltage transformer.
Claims (9)
1, a kind of vacuum mixing type current-limiting fuse, it comprises small-sized current limiting fuse (1), it is characterized in that being serially connected with on small-sized current limiting fuse (1) vacuum fuse (2).
2, a kind of vacuum mixing type current-limiting fuse according to claim 1, it is characterized in that described vacuum fuse (2) by copper free wire as melt (3), be welded on the oxygen-free copper contact rod (4) at two ends and outwards draw, melt (3) is sealed in the vacuum ceramic pipe (5), is provided with metallic shield (6) in the vacuum ceramic pipe (5).
3, a kind of vacuum mixing type current-limiting fuse according to claim 1 and 2, the support (8) that it is characterized in that fuse (7) in the described small-sized current limiting fuse (1) is a quartz glass bar, in middle 1 cm range of the close support around quartz glass bar of fuse (7) (8).
4, a kind of vacuum mixing type current-limiting fuse according to claim 2 is characterized in that described vacuum ceramic pipe (5) is 35 millimeters of diameter of phi, 45 millimeters of length, and the vacuum degree of vacuum fuse is 3 * 10
-4Handkerchief.
5, a kind of vacuum mixing type current-limiting fuse according to claim 3 is characterized in that described vacuum ceramic pipe (5) is 35 millimeters of diameter of phi, 45 millimeters of length, and the vacuum degree of vacuum fuse is 3 * 10
-4Handkerchief.
6, a kind of vacuum mixing type current-limiting fuse according to claim 2, the diameter that it is characterized in that described oxygen-free copper contact rod (4) is 8 millimeters.
7, a kind of vacuum mixing type current-limiting fuse according to claim 3, the diameter that it is characterized in that described oxygen-free copper contact rod (4) is 8 millimeters.
8, a kind of vacuum mixing type current-limiting fuse according to claim 4, the diameter that it is characterized in that described oxygen-free copper contact rod (4) is 8 millimeters.
9, a kind of vacuum mixing type current-limiting fuse according to claim 5, the diameter that it is characterized in that described oxygen-free copper contact rod (4) is 8 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510061978 CN1790586A (en) | 2005-12-09 | 2005-12-09 | Vacuum mixing type current-limiting fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510061978 CN1790586A (en) | 2005-12-09 | 2005-12-09 | Vacuum mixing type current-limiting fuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1790586A true CN1790586A (en) | 2006-06-21 |
Family
ID=36788334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510061978 Pending CN1790586A (en) | 2005-12-09 | 2005-12-09 | Vacuum mixing type current-limiting fuse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1790586A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101527235B (en) * | 2008-03-06 | 2011-12-21 | 颜琼章 | Overcurrent protective device and manufacture method thereof |
| CN101741074B (en) * | 2008-11-12 | 2012-11-14 | 苏俊连 | Ship electricity fault current restrictor |
| CN102881538A (en) * | 2012-10-12 | 2013-01-16 | 好利来（中国）电子科技股份有限公司 | Composite fuse wire |
-
2005
- 2005-12-09 CN CN 200510061978 patent/CN1790586A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101527235B (en) * | 2008-03-06 | 2011-12-21 | 颜琼章 | Overcurrent protective device and manufacture method thereof |
| CN101741074B (en) * | 2008-11-12 | 2012-11-14 | 苏俊连 | Ship electricity fault current restrictor |
| CN102881538A (en) * | 2012-10-12 | 2013-01-16 | 好利来（中国）电子科技股份有限公司 | Composite fuse wire |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |