CN205429713U - Over -voltage protector - Google Patents
Over -voltage protector Download PDFInfo
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- CN205429713U CN205429713U CN201520877350.6U CN201520877350U CN205429713U CN 205429713 U CN205429713 U CN 205429713U CN 201520877350 U CN201520877350 U CN 201520877350U CN 205429713 U CN205429713 U CN 205429713U
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- current limiting
- limiting element
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- 230000001012 protector Effects 0.000 title abstract 6
- 239000012212 insulator Substances 0.000 claims abstract description 29
- 230000000694 effects Effects 0.000 abstract description 15
- 238000010891 electric arc Methods 0.000 abstract description 9
- 230000009471 action Effects 0.000 abstract description 4
- 238000009413 insulation Methods 0.000 abstract description 3
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 abstract description 3
- 239000004020 conductor Substances 0.000 description 37
- 230000004888 barrier function Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000003292 diminished effect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009422 external insulation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 208000025274 Lightning injury Diseases 0.000 description 1
- 230000036772 blood pressure Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
Abstract
The utility model provides an over -voltage protector, in its use, the current limiting element among the over -voltage protector is parallelly connected with the insulator, and the power current under the thunderbolt effect among the current limiting element increases for series gap between over -voltage protector and the insulator diminishes, thus the potential difference between reduced insulation place tower arm and the insulated wire, the probability of the sub - flashover of reduced insulation, and then reduce the probability that the insulated wire tripping operation has a power failure. And the utility model provides a current limiting element and the through -flow action under the effect of lightning overvoltage of wire drainage ball among the over -voltage protector, release lightning overvoltage energy effectively restraines the lightning overvoltage to make electric arc extinguish in the twinkling of an eye, like this the utility model provides an over -voltage protector still can carry out the arc extinguishing to insulated wire under the circumstances of not installing earthing device, play protection insulated wire's effect.
Description
Technical field
This utility model belongs to electric protective equipment technical field, particularly relates to a kind of overvoltage protection device.
Background technology
Insulated conductor is uniformly and hermetically to wrap up, in wire periphery, the covered wire that one layer of non electrically conductive material is formed, and its lightning-caused breaking characteristic has significantly different compared with the lightning-caused breaking characteristic of bare conductor.When direct lightning strike or lightning induced voltage act on the insulator arc-over that bare conductor causes on bare conductor, the electric arc of generation slides along bare conductor under electrodynamic effect, will not serious burn bare conductor.Insulated conductor is the most different, when causing the insulator arc-over on insulated conductor under the overvoltage effect of direct lightning strike or induced lightening and puncture the insulating barrier of insulated conductor, breakdown insulating barrier is a Pinhole-shaped, the electric arc produced is intercepted by surrounding insulating barrier, electric arc can only burn at pin hole, so can be blown by insulated conductor within the extremely short time.
Around the characteristic of insulated conductor breakage caused by lightning stroke, domestic and international expert, with regard to the most effectively preventing suspended insulated guide wire generation lightning-caused breaking accident from expanding the R&D work of substantial amounts of experimental study and application technology, resulting in overvoltage protection device.Wherein, overvoltage protection device can be connected in parallel on insulated conductor; it is as the inter space device being artificially arranged on insulated conductor; isolated insulation state it is under normal working voltage; under overvoltage, the breakdown ground connection of inter space device is with blood pressure lowering of discharging, thus plays the effect of protection insulated conductor under overvoltage.But current overvoltage protection device needs to carry out arc extinguishing by installation grounding device.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of overvoltage protection device, for carrying out arc extinguishing by current limiting element fast shut-off power current.Technical scheme is as follows:
This utility model provides a kind of overvoltage protection device, including: current limiting element, wire drainage ball, the first conductive pole, the second conductive pole and connection strut plate；Wherein, described first conductive pole is provided with the first terminals, described second conductive pole is provided with the second terminals, and the voltage of described first terminals is more than the voltage of described second wire barrel；One end of described wire drainage ball connects described first conductive pole, and the other end of described wire drainage ball connects one end of described current limiting element by current limiting element drainage ball, and the other end of described current limiting element connects described second conductive pole；
Described connection strut plate is for adjusting the height of described current limiting element and insulator, so that the bottom of described current limiting element and described insulator is positioned in same level.
Preferably, described second terminals are connected with the pressure releasing device in spark gap by insulator.
Preferably, described current limiting element includes: have the resistance of nonlinear characteristic.
Preferably, described resistance is ZnO resistors.
Compared with prior art, the technique scheme that this utility model provides has the advantage that
The above-mentioned overvoltage protection device that this utility model provides is in use; current limiting element in overvoltage protection device is in parallel with insulator; under thunderbolt effect, the power current in current limiting element increases; series gap between overvoltage protection device and insulator is diminished; thus reduce the potential difference between insulator place tower arm and insulated conductor; reduce the probability of insulator arc-over, and then reduce the probability that insulated conductor tripping operation has a power failure.And current limiting element and the through-flow action under the effect of lightning surge of wire drainage ball in the overvoltage protection device that this utility model provides; release lightning surge energy effectively suppresses lightning surge; so that the extinguishing of electric arc moment; the overvoltage protection device that so this utility model provides still can carry out arc extinguishing to insulated conductor in the case of uneasiness dress grounding device, plays the effect of protection insulated conductor.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in describing below is embodiments more of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of the overvoltage protection device that this utility model embodiment provides.
Detailed description of the invention
For making the purpose of this utility model embodiment, technical scheme and advantage clearer, below in conjunction with the accompanying drawing in this utility model embodiment, technical scheme in this utility model embodiment is clearly and completely described, obviously, described embodiment is a part of embodiment of this utility model rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of this utility model protection.
Refer to Fig. 1, it illustrates a kind of structural representation of the overvoltage protection device that this utility model embodiment provides, may include that current limiting element 11, wire drainage ball the 12, first conductive pole the 13, second conductive pole 14 and connect strut plate 15.Wherein, the first conductive pole 11 is provided with the first terminals, the second conductive pole 12 is provided with the second terminals, and the voltage of the first terminals is more than the voltage of the second wire barrel.One end of wire drainage ball 12 connects the first conductive pole 13, and the other end of wire drainage ball 12 connects one end of current limiting element 11 by current limiting element drainage ball 16, and the other end of current limiting element 11 connects the second conductive pole 14.
That is; when overvoltage protection device is arranged on insulated conductor; the first terminals in overvoltage protection device can connect the high voltage on insulated conductor; the second terminals in overvoltage protection device can connect the low-pressure end on insulated conductor so that the electric current on insulated conductor can flow to the second terminals from the first terminals.Again because connecting between the first terminals and the second terminals and having wire drainage ball 12 and current limiting element 11, so the electric current on insulated conductor can flow through wire drainage ball 12 and current limiting element 11.
When lightning surge or other failure cause cause flashover over the ground, when making to form metallicity arc discharge short circuit on insulated conductor, by the first conductive pole 11 and wire drainage ball 12 into power current guided current limiting element 11, by means of the nonlinear characteristic of current limiting element 11, sine-shaped power current is transformed into the power current of pinnacle waveform.Owing in the power current of the peaked wave certain time before zero passage, its current amplitude is less, and the residual voltage of current limiting element 11 can cut down discharge voltage, so current limiting element can make electric arc moment extinguish and reach to block rapidly power current, reach the trip problem effectively preventing insulated conductor from causing because of the fusing of power current high temperature.Briefly the arc quenching principle of the overvoltage protection that this utility model embodiment provides is current limiting element and wire drainage ball through-flow action under the effect of lightning surge in overvoltage protection device; release lightning surge energy effectively suppresses lightning surge, so that electric arc moment extinguishes.
In this utility model embodiment, current limiting element includes: have the resistance of nonlinear characteristic.Such as ZnO resistors.This ZnO resistors has nonlinear characteristic, and sine-shaped power current can be converted to the power current of pinnacle waveform.Wherein every technical parameter of ZnO resistors is as shown in table 1.
Every technical parameter of table 1 ZnO resistors
Connecting strut plate 15 is a tunable arrangement, for adjusting the height of current limiting element 11 and insulator, so that the bottom of current limiting element 11 and insulator is positioned in same level.Such as can adjust the nut connected on strut plate 15, while adjusting nut, the height of current limiting element 11 and insulator is adjusted, and stops adjusting after the bottom making current limiting element 11 and insulator is positioned in same level.
Knowable to technique scheme; the above-mentioned overvoltage protection device that this utility model provides is in use; current limiting element in overvoltage protection device is in parallel with insulator; under thunderbolt effect, the power current in current limiting element increases; series gap between overvoltage protection device and insulator is diminished; thus reduce the potential difference between insulator place tower arm and insulated conductor, reduce the probability of insulator arc-over, and then reduce the probability that insulated conductor tripping operation has a power failure.And current limiting element and the through-flow action under the effect of lightning surge of wire drainage ball in the overvoltage protection device that this utility model provides; release lightning surge energy effectively suppresses lightning surge; so that the extinguishing of electric arc moment; the overvoltage protection device that so this utility model provides still can carry out arc extinguishing to insulated conductor in the case of uneasiness dress grounding device, plays the effect of protection insulated conductor.
In this utility model embodiment; for reducing the power-frequency voltage that overvoltage protection device bears; second terminals can be connected with the pressure releasing device in spark gap by insulator, so can reduce the line loss of overvoltage protection device, increases the service life of overvoltage protection device.And when installing overvoltage protection device; can be directly connected with insulator by the first terminals and the second terminals; so need not break insulated conductor when installing overvoltage protection device; and then seal waterproof problem without solving insulated conductor, do not interfere with the mechanical stretching performance and used life of insulated conductor.Owing to can be directly connected with insulator by the first terminals and the second terminals when installing overvoltage protection device, it is possible to insulator is not replaced, is also not required to original circuit is modified.
Here should be noted that a bit: when insulated conductor is properly functioning; overvoltage protection device is not subject to the effect of lasting power current, and the value of the negative electricity rate being in the current limiting element of rest device (the most non-duty) can be higher so that the residual voltage of current limiting element decreases；After current limiting element causes the series gap between overvoltage protection device and insulator to diminish under the lightning surge effect of certain amplitude; current limiting element is the most in running order, and therefore the external insulation level of overvoltage protection device can be less than the external insulation level of gapless arrestyer.And on properly functioning insulated conductor, insulated conductor has enough overvoltage tolerances, and therefore the series gap size between overvoltage protection device and insulator may select and avoids switching overvoltage to work, to alleviate current limiting element operating duty ability.Wherein the value of negative electricity rate of current limiting element, the residual voltage of current limiting element, series gap between overvoltage protection device and insulator are different according to the difference of insulated conductor, are not any limitation as this this utility model to it.
It should be noted that in this article, the relational terms of such as first and second or the like is used merely to make a distinction an entity with another entity, and not necessarily requires or imply the relation that there is any this reality between these entities.And, term " includes ", " comprising " or its any other variant are intended to comprising of nonexcludability, so that equipment not only includes those key elements, but also includes other key elements being not expressly set out, or also includes the key element that equipment is intrinsic.In the case of there is no more restriction, statement " including ... " key element limited, it is not excluded that there is also other identical element in a device.
Described above to the disclosed embodiments, makes those skilled in the art be capable of or uses this utility model.Multiple amendment to these embodiments will be apparent from for a person skilled in the art, and generic principles defined herein can realize in the case of without departing from spirit or scope of the present utility model in other embodiments.Therefore, this utility model is not intended to be limited to the embodiments shown herein, and is to fit to the widest scope consistent with principles disclosed herein and features of novelty.
The above is only preferred implementation of the present utility model; it should be pointed out that, for those skilled in the art, on the premise of without departing from this utility model principle; can also make some improvements and modifications, these improvements and modifications also should be regarded as protection domain of the present utility model.
Claims (4)
1. an overvoltage protection device, it is characterised in that including: current limiting element, wire drainage ball, the first conductive pole, the second conductive pole and connection strut plate；Wherein, described first conductive pole is provided with the first terminals, described second conductive pole is provided with the second terminals, and the voltage of described first terminals is more than the voltage of described second wire barrel；One end of described wire drainage ball connects described first conductive pole, and the other end of described wire drainage ball connects one end of described current limiting element by current limiting element drainage ball, and the other end of described current limiting element connects described second conductive pole；
Described connection strut plate is for adjusting the height of described current limiting element and insulator, so that the bottom of described current limiting element and described insulator is positioned in same level.
Overvoltage protection device the most according to claim 1, it is characterised in that described second terminals are connected with the pressure releasing device in spark gap by insulator.
Overvoltage protection device the most according to claim 1, it is characterised in that described current limiting element includes: there is the resistance of nonlinear characteristic.
Overvoltage protection device the most according to claim 3, it is characterised in that described resistance is ZnO resistors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520877350.6U CN205429713U (en) | 2015-11-05 | 2015-11-05 | Over -voltage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520877350.6U CN205429713U (en) | 2015-11-05 | 2015-11-05 | Over -voltage protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205429713U true CN205429713U (en) | 2016-08-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520877350.6U Active CN205429713U (en) | 2015-11-05 | 2015-11-05 | Over -voltage protector |
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| Country | Link |
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| CN (1) | CN205429713U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113628939A (en) * | 2021-08-13 | 2021-11-09 | 温州益坤电气股份有限公司 | Prevent top net overvoltage protection device |
-
2015
- 2015-11-05 CN CN201520877350.6U patent/CN205429713U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113628939A (en) * | 2021-08-13 | 2021-11-09 | 温州益坤电气股份有限公司 | Prevent top net overvoltage protection device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |