CN203951170U - Electric capacitor fuse - Google Patents
Electric capacitor fuse Download PDFInfo
- Publication number
- CN203951170U CN203951170U CN201420291709.7U CN201420291709U CN203951170U CN 203951170 U CN203951170 U CN 203951170U CN 201420291709 U CN201420291709 U CN 201420291709U CN 203951170 U CN203951170 U CN 203951170U
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- Prior art keywords
- fuse
- electric capacitor
- melt
- bullets
- connecting portion
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Abstract
The utility model provides a kind of electric capacitor fuse, it includes a columniform body, a wire connecting portion and an electric capacity connecting portion, this wire connecting portion and this capacitance pontes are not fixed on two ends of this body, this wire connecting portion comprises connecting terminal block and a hex nut of a L shape, this hex nut is for being crimped on this connecting terminal block the screw mandrel of this body, this electric capacity connecting portion is the female shaft-like interface of tool, this body comprises a fiberglass pipe and is plugged in the melt of a silver metal in this fiberglass pipe, in this fiberglass pipe, be provided with quartz sand, those quartz sands can evaporate and be covered in the fusing end of this melt in the time of this melt arcing.Electric capacitor of the present utility model has advantages of extinguish arcs, can not spray part and there is no noise pollution with fuse.
Description
Technical field
The utility model relates to circuit overloads protection field, particularly a kind of electric capacitor fuse.
Background technology
High-voltage power capacitor moves in electric power system, as the main devices of reactive power compensation and harmonic wave control, the capacity current of capacitor of flowing through is very large, in numerous design specifications, capacitor often designed to be able to and bears 1.35～1.43 times to the overcurrent of rated current, but nonetheless, in system because the system failure, the overcurrent that system harmonics etc. cause is often higher than this limit value, too high electric current causes very large injury can to medium and the conductor etc. of capacitor, reduce the service life of capacitor, What is more, cause the fault of capacitor, bring hidden danger to power system operation.
Traditional capacitor current limiter is expulsion fuse, the structure of the short melt of this equipment choosing, under overload current, outer power spring is broken short melt, the high-temperature electric arc that short melt produces is broken in dependence, make the gas exhausted material arranging in advance in insulated tube produce a large amount of high-temperature gases, impel electric arc outside pipe, to spray elongating arc simultaneously and carry out extinguish arcs.
Although the fuse of this injecting type can play the effect of single capacitor current limliting, but also there are a lot of shortcomings, the most significant shortcoming is that this fuse ejects as cut-offfing by the fuse of spring handle fusing, in overcurrent action, cut-off energy large, spring can spray far distance conventionally, if and in the scope of spraying, be furnished with other capacitor device, the spring that just likely can be ejected hits conductor part and causes short circuit, cause very serious consequence, if so adopt expulsion fuse, in the time of design, often need the jet length of fuse to take into account, this just makes capacitor move on-the-spot layout and there is special requirement in place, for some to the conditional engineering in place, this shortcoming of expulsion fuse is just difficult to overcome.
In addition, spray fusing and be not suitable for equally some indoor engineering projects and capacitor metal type enclosures etc., the high voltage electric equipment of these devices is often arranged closely, wiring is complicated, and the equipment belt that the spring that fuse ejects and wire tend to moving to other carrys out beyond thought accident.So the fuse of this type is being only applicable to indoor project.
The parabolic hidden danger that the annexes such as the spring spraying except this fuse cause, in the time that this fuse action is sprayed, huge owing to cut-offfing energy, the sound of action is often very huge, if have resident to live around or other do not allow noisy common equipment, this fuse has just become pollution source of noise.
Utility model content
The technical problems to be solved in the utility model is that the easy starting arc of electric capacitor fuse in order to overcome prior art, jet length are large and cause the defect of noise pollution, a kind of electric capacitor fuse is provided, and this electric capacitor has advantages of extinguish arcs, can not spray part and there is no noise pollution with fuse.
The utility model is to solve above-mentioned technical problem by following technical proposals:
A kind of electric capacitor fuse, its feature is, it includes a columniform body, a wire connecting portion and an electric capacity connecting portion, this wire connecting portion and this capacitance pontes are not fixed on two ends of this body, this wire connecting portion comprises connecting terminal block and a hex nut of a L shape, this hex nut is for being crimped on this connecting terminal block the screw mandrel of this body, this electric capacity connecting portion is the female shaft-like interface of tool, this body comprises a fiberglass pipe and is plugged in the melt of a silver metal in this fiberglass pipe, in this fiberglass pipe, be provided with quartz sand, those quartz sands can evaporate and be covered in the fusing end of this melt in the time of this melt arcing.
Preferably, those quartz sands intersperse among in this fiberglass pipe.
Preferably, this melt comprises a taper connection portion, and this taper connection portion comprises two bullets, and relatively and electrical connection, those quartz sands scatter and be covered in this taper connection portion for the tip of these two bullets.
Preferably, these two bullets are worm gear shape, and those quartz sands scatter and be covered in the concave shaped portion between the gear teeth of those bullets.
Preferably, this melt comprises a taper connection portion, and this taper connection portion comprises two bullets, and the tip of these two bullets relatively and electrical connection, on those bullets, be coated with a quartz sand layer, this quartz sand layer outer side covers has a cyanurotriamide modified urea resin arc extinguishing layer.
Preferably, on the close inwall of this taper connection portion of this fiberglass pipe, be coated with successively a copper foil layer and a flame retardant silica gel layer.
Preferably, this copper foil layer includes the groove of parabolic shape, is evenly distributed with multiple heat conduction pin posts with spheric end in this groove, and this groove is towards this taper connection portion.
Positive progressive effect of the present utility model is: a kind of electric capacitor fuse is provided, and this electric capacitor has advantages of extinguish arcs, can not spray part and there is no noise pollution with fuse.
Brief description of the drawings
Fig. 1 is the structural representation of fuse for the electric capacitor of the utility model embodiment 1.
Fig. 2 is the internal structure schematic diagram of the body of the electric capacitor fuse of Fig. 1.
Fig. 3 is the use principle figure of fuse for the electric capacitor of Fig. 1.
Fig. 4 is the internal structure schematic diagram of fuse for the electric capacitor of the utility model embodiment 2.
Fig. 5 is the structural representation of the bullet of the electric capacitor fuse of Fig. 4.
Fig. 6 is the internal structure schematic diagram of fuse for the electric capacitor of the utility model embodiment 3.
Fig. 7 is the partial structurtes schematic diagram of fuse for the electric capacitor of Fig. 6.
Description of reference numerals:
Electric capacitor fuse: 1 M16 nut: 2
Electric capacitor: 3 bodies: 11
Connecting terminal block: 12 hex nuts: 13
Electric capacity connecting portion: 14 quartz sands: 15
Melt: 16 fiberglass pipes: 17
Splicing ear: 18 taper connection portions: 19
Press down arc parts: 10 copper foil layers: 111
Flame retardant silica gel layer: 112 heat conduction pin posts: 113
Bullet: 190
Embodiment
Lift a preferred embodiment below, and carry out by reference to the accompanying drawings the clearer the utility model that intactly illustrates.
Embodiment 1
The electric capacitor of the present embodiment is as follows by the structure of fuse:
Understood incorporated by reference to Fig. 1, the electric capacitor of the present embodiment includes a columniform body 11, wire connecting portion and an electric capacity connecting portion 14 with fuse 1, this wire connecting portion and this electric capacity connecting portion 14 are fixed on two ends of this body 11 respectively, this wire connecting portion comprises connecting terminal block 12 and a hex nut 13 of a L shape, this hex nut 13 is for being crimped on this connecting terminal block 12 screw mandrel of this body 11, and this electric capacity connecting portion 14 is the female shaft-like interface of tool.
Understood incorporated by reference to Fig. 2, this body 11 comprises a fiberglass pipe 17 and is plugged in the melt 16 of a silver metal in this fiberglass pipe 17, in this fiberglass pipe 17, be provided with quartz sand 15, those quartz sands 15 can evaporate and be covered in the fusing end of this melt 16 in the time of this melt 16 arcing, those quartz sands 15 intersperse among in this fiberglass pipe, and this melt 16 comprises two splicing ears 18.
The electric capacitor of the present embodiment is as follows with operation principle and the technique effect of fuse:
When use, understood incorporated by reference to Fig. 3, electric capacitor 3 is installed on framework, made electric capacitor 3 good earths; A M16 nut 2 is first arranged on to the bottom of the lead screw of electric capacitor 3; Electric capacitor is directly installed on fuse 1 on the binding post of electric capacitor 3, installs with torque wrench moment of torsion according to the rules; Connecting terminal block 12 is adjusted to suitable angle, screw hex nut with torque wrench moment of torsion according to the rules, complete the electrical connection of connecting terminal block 12.
Understood incorporated by reference to Fig. 2, due to melt 16 and quartz sand 15 pressings of silver metal and be sealed in fiberglass pipe 17, between age at failure, melt 16 evaporates, the electric arc producing melts quartz sand 15 around, thereby has absorbed the heat of electric arc generation and made rapidly arc extinction, excision trouble unit.The quartz of fusing is cooling and solidify, and forms the insulating plug between fuse two ends, has prevented arc reignition.Therefore, the electric capacitor of the present embodiment has advantages of extinguish arcs, can not spray part and there is no noise pollution with fuse.
Embodiment 2
The electric capacitor of the present embodiment is as follows by the structure of fuse:
The electric capacitor of the present embodiment has more similarity with the electric capacitor fuse 1 of fuse 1 and embodiment 1, and these similarities do not repeat them here.Different with fuse 1 from the electric capacitor of embodiment 1, understood incorporated by reference to Fig. 4-5, the electric capacitor of the present embodiment also comprises a taper connection portion 19 with the melt 16 of fuse, this taper connection portion 19 comprises two bullets 190, these two bullets 190 are worm gear shape, those quartz sands scatter and are covered in the concave shaped portion between the gear teeth of those bullets 190, the tip of these two bullets 190 relatively and electrical connection, on those bullets 190, be coated with a quartz sand layer, this quartz sand layer outer side covers has a cyanurotriamide modified urea resin arc extinguishing layer.
The electric capacitor of the present embodiment is as follows with operation principle and the technique effect of fuse:
When work, understood incorporated by reference to Fig. 5, the moment occurring in fault, the gear teeth of those bullets 190 are equivalent to heat shim, can quartz sand 15 (1750 DEG C of fusing points, 2550 DEG C of boiling points) be melted in moment (being less than 200 microseconds), quartz sand 15 after thawing is along the oblique current downflow of the concave shaped portion between the gear teeth and follow evaporation, finally be covered on the breakpoint of melt, realize and eliminate electric arc, prevent arcing again.
In view of quenching time of commercially available high-tension fuse is in 10 milliseconds, be generally 3 milliseconds to 5 milliseconds, a lot of high frequency electrical equipment can damage because of overcurrent.Therefore the electric capacitor of the present embodiment can be controlled at the quenching time in 200 microseconds with fuse 1, and then has protected electric equipment, prevents high-tension harmonic wave breakdown potential container.
Need to indicate, these two bullets 190 are not limited to worm gear shape, anyly can separate and heat quartz sand 15; increase heating surface (area) (HS; and the structure that makes the quartz sand flow direction combustion fire point of fusing, all can adopt and be applied for protection, to prevent from replacing configuration use without compensation.
Embodiment 3
The electric capacitor of the present embodiment has more similarity with the electric capacitor fuse 1 of fuse 1 and embodiment 2, and these similarities do not repeat them here.Different with fuse 1 from the electric capacitor of embodiment 2, understood incorporated by reference to Fig. 6-7, on the close inwall of this taper connection portion 19 of this fiberglass pipe 17, be coated with successively a copper foil layer 111 and a flame retardant silica gel layer 112.This copper foil layer 111 includes the groove of parabolic shape, is evenly distributed with multiple heat conduction pin posts 113 with spheric end in this groove, and this groove is towards this taper connection portion 19.
When work, understood incorporated by reference to Fig. 5, the moment occurring in fault, electric arc can be towed to the spheric end electric discharge of this heat conduction pin post 113, so as scorching hot those heat conduction pin post 113 and these copper foil layers 111, and then will evaporate, in view of the groove of copper foil layer 111 is parabolic shape, therefore can form pencil jet source, flame retardant silica gel is covered in to breakpoint.Flame retardant silica gel can adopt 704 silica gel or arc extinguishing spirit, can certainly adopt silicone oil to substitute.
This copper foil layer 111, this flame retardant silica gel layer 112 and the mutual co-ordination of this heat conduction pin post 113, not only can draw electric arc, restriction wandering, can also form pencil jet source arc extinguishing, therefore can be called have striking and jet arc extinguishing dual-use function press down arc parts 110 (please refer to Fig. 6 is understood).
Although more than described embodiment of the present utility model, it will be understood by those of skill in the art that these only illustrate, protection range of the present utility model is limited by appended claims.Those skilled in the art is not deviating under the prerequisite of principle of the present utility model and essence, can make various changes or modifications to these execution modes, but these changes and amendment all fall into protection range of the present utility model.
Claims (7)
1. an electric capacitor fuse, it is characterized in that, it includes a columniform body, a wire connecting portion and an electric capacity connecting portion, this wire connecting portion and this capacitance pontes are not fixed on two ends of this body, this wire connecting portion comprises connecting terminal block and a hex nut of a L shape, this hex nut is for being crimped on this connecting terminal block the screw mandrel of this body, this electric capacity connecting portion is the female shaft-like interface of tool, this body comprises a fiberglass pipe and is plugged in the melt of a silver metal in this fiberglass pipe, in this fiberglass pipe, be provided with quartz sand, those quartz sands can evaporate and be covered in the fusing end of this melt in the time of this melt arcing.
2. electric capacitor fuse as claimed in claim 1, is characterized in that, those quartz sands intersperse among in this fiberglass pipe.
3. electric capacitor fuse as claimed in claim 1, it is characterized in that, this melt comprises a taper connection portion, and this taper connection portion comprises two bullets, relatively and electrical connection, those quartz sands scatter and are covered in this taper connection portion for the tip of these two bullets.
4. electric capacitor fuse as claimed in claim 1, is characterized in that, these two bullets are worm gear shape, and those quartz sands scatter and be covered in the concave shaped portion between the gear teeth of those bullets.
5. electric capacitor fuse as claimed in claim 1, it is characterized in that, this melt comprises a taper connection portion, this taper connection portion comprises two bullets, the tip of these two bullets relatively and electrical connection, on those bullets, be coated with a quartz sand layer, this quartz sand layer outer side covers has a cyanurotriamide modified urea resin arc extinguishing layer.
6. electric capacitor fuse as claimed in claim 5, is characterized in that, on the close inwall of this taper connection portion of this fiberglass pipe, is coated with successively a copper foil layer and a flame retardant silica gel layer.
7. electric capacitor fuse as claimed in claim 6, is characterized in that, this copper foil layer includes the groove of parabolic shape, is evenly distributed with multiple heat conduction pin posts with spheric end in this groove, and this groove is towards this taper connection portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420291709.7U CN203951170U (en) | 2014-06-03 | 2014-06-03 | Electric capacitor fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420291709.7U CN203951170U (en) | 2014-06-03 | 2014-06-03 | Electric capacitor fuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203951170U true CN203951170U (en) | 2014-11-19 |
Family
ID=51893187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420291709.7U Expired - Fee Related CN203951170U (en) | 2014-06-03 | 2014-06-03 | Electric capacitor fuse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203951170U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110561801A (en) * | 2019-09-16 | 2019-12-13 | 昆山圣达保持架有限公司 | Manufacturing method of melamine fiber tube for fuse |
-
2014
- 2014-06-03 CN CN201420291709.7U patent/CN203951170U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110561801A (en) * | 2019-09-16 | 2019-12-13 | 昆山圣达保持架有限公司 | Manufacturing method of melamine fiber tube for fuse |
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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: 20141119 Termination date: 20210603 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |