CN205509485U - Over -voltage protector - Google Patents
Over -voltage protector Download PDFInfo
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- CN205509485U CN205509485U CN201520877349.3U CN201520877349U CN205509485U CN 205509485 U CN205509485 U CN 205509485U CN 201520877349 U CN201520877349 U CN 201520877349U CN 205509485 U CN205509485 U CN 205509485U
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- limiting element
- current limiting
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- 230000001012 protector Effects 0.000 title abstract description 7
- 239000012212 insulator Substances 0.000 claims abstract description 27
- 230000000694 effects Effects 0.000 abstract description 16
- 238000010891 electric arc Methods 0.000 abstract description 9
- 238000009413 insulation Methods 0.000 abstract description 9
- 230000009471 action Effects 0.000 abstract description 4
- 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 33
- 230000005611 electricity Effects 0.000 description 7
- 230000004888 barrier function Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009422 external insulation Methods 0.000 description 2
- 239000012530 fluid Substances 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
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000008569 process 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
- 230000001629 suppression 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 insulation that one layer of non electrically conductive material is formed
Line, its lightning-caused breaking characteristic has significantly different compared with the lightning-caused breaking characteristic of bare conductor.At direct lightning strike or
When lightning induced voltage acts on the insulator arc-over that bare conductor causes on bare conductor, the electric arc of generation is at electricity
Slide along bare conductor under the effect of power, will not serious burn bare conductor.Insulated conductor is the most different,
Under the overvoltage effect of direct lightning strike or induced lightening, cause the insulator arc-over on insulated conductor and puncture insulation
During the insulating barrier of wire, breakdown insulating barrier is a Pinhole-shaped, and the electric arc of generation is by surrounding insulating barrier
Intercepting, 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 leads with regard to the most effectively preventing overhead insulating
Line generation lightning-caused breaking accident expands the R&D work of substantial amounts of experimental study and application technology, thus obtains
Arrive overvoltage protection device.Wherein, overvoltage protection device can be connected in parallel on insulated conductor, and it is as people
For the inter space device being arranged on insulated conductor, under normal working voltage, it is in isolated insulation state,
Under overvoltage, the breakdown ground connection of inter space device is with blood pressure lowering of discharging, thus plays protection insulation under overvoltage and lead
The effect of line.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 by limit
Fluid element fast shut-off power current carrys out arc extinguishing.Technical scheme is as follows:
This utility model provides a kind of overvoltage protection device, including: current limiting element, wire drainage ball, the
One conductive pole and the second conductive pole；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 connects more than described second
The voltage of spool；One end of described wire drainage ball connects described first conductive pole, described wire drainage ball
The other end connect one end of described current limiting element, the other end of described current limiting element connects described second leads
Electricity post.
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.
Preferably, described overvoltage protection device also includes: connecting strut plate, described connection strut plate is used for
Adjust the height of described current limiting element and insulator, so that described current limiting element and the bottom of described insulator
It is positioned in same level.
Preferably, described wire drainage ball is connected with described current limiting element by current limiting element drainage ball.
Compared with prior art, the technique scheme that this utility model provides has the advantage that
This utility model provide above-mentioned overvoltage protection device in use, in overvoltage protection device
Current limiting element is in parallel with insulator, and under thunderbolt effect, the power current in current limiting element increases so that mistake
Series gap between voltage protector and insulator diminishes, thus reduces insulator place tower arm and insulation
Potential difference between wire, reduces the probability of insulator arc-over, and then reduces what insulated conductor tripping operation had a power failure
Probability.And current limiting element and wire drainage ball are at thunder and lightning in the overvoltage protection device that this utility model provides
Through-flow action under the effect of overvoltage, release lightning surge energy effectively suppresses lightning surge, from
And making electric arc moment extinguish, the overvoltage protection device that such this utility model provides fills grounding device in uneasiness
In the case of still insulated conductor can be carried out arc extinguishing, play protection insulated conductor effect.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will
The accompanying drawing used required in embodiment or description of the prior art is briefly described, it should be apparent that,
Accompanying drawing in describing below is embodiments more of the present utility model, comes for those of ordinary skill in the art
Say, 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 first structural representation of the overvoltage protection device that this utility model embodiment provides；
Fig. 2 is the second structural representation of the overvoltage protection device that this utility model embodiment provides；
Fig. 3 is the third 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
Accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out clear,
It is fully described by, it is clear that described embodiment is a part of embodiment of this utility model rather than complete
The embodiment in portion.Based on the embodiment in this utility model, those of ordinary skill in the art are not making
The every other embodiment obtained under creative work premise, broadly falls into the scope of this utility model protection.
Refer to Fig. 1, it illustrates a kind of structure of the overvoltage protection device that this utility model embodiment provides
Schematic diagram, may include that current limiting element 11, wire drainage ball the 12, first conductive pole 13 and second are led
Electricity post 14.Wherein, the first conductive pole 11 is provided with the first terminals, the second conductive pole 12 is arranged
There are the second terminals, and the voltage of the first terminals is more than the voltage of the second wire barrel.Wire drainage ball 12
One end connect the first conductive pole 13, the other end of wire drainage ball 12 connects one end of current limiting element 11,
The other end of current limiting element 11 connects the second conductive pole 14.
It is to say, when overvoltage protection device is arranged on insulated conductor, in overvoltage protection device
One terminals can connect the high voltage on insulated conductor, and the second terminals in overvoltage protection device are permissible
Connect the low-pressure end on insulated conductor so that the electric current on insulated conductor can flow to the from the first terminals
Two terminals.Again because connecting between the first terminals and the second terminals and having wire drainage ball 12 and current limliting
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 so that form metal on insulated conductor
During property arc discharge short circuit, guide power current into limit by the first conductive pole 11 and wire drainage ball 12
Fluid element 11, sine-shaped power current is transformed into by the nonlinear characteristic by means of current limiting element 11
The power current of pinnacle waveform.Due to its electricity in the power current of the peaked wave certain time before zero passage
Stream amplitude is less, and the residual voltage of current limiting element 11 can cut down discharge voltage, so current limiting element is permissible
Make electric arc moment extinguish and reach to block rapidly power current, reach effectively to prevent insulated conductor because of power frequency electric
The trip problem that stream high temperature fuses and causes.The overvoltage that briefly this utility model embodiment provides is protected
The arc quenching principle of protection unit be in overvoltage protection device current limiting element and wire drainage ball in lightning surge
Through-flow action under effect, 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, can sine-shaped power frequency electric be circulated
It is changed 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
Knowable to technique scheme, the above-mentioned overvoltage protection device that this utility model provides is in the process of use
In, the current limiting element in overvoltage protection device is in parallel with insulator, under thunderbolt effect in current limiting element
Power current increases so that the series gap between overvoltage protection device and insulator diminishes, thus reduces
Potential difference between insulator place tower arm and insulated conductor, reduces the probability of insulator arc-over, and then fall
The probability that the tripping operation of low insulation wire has a power failure.And current limliting unit in the overvoltage protection device that this utility model provides
The through-flow action under the effect of lightning surge of part and wire drainage ball, release lightning surge energy has
Effect suppression lightning surge, so that electric arc moment extinguishes, the overvoltage that such this utility model provides is protected
Protect device and still insulated conductor can be carried out arc extinguishing in the case of uneasiness dress grounding device, play protection insulation
The effect of wire.
In this utility model embodiment, for reducing the power-frequency voltage that overvoltage protection device bears, second connects
Line end can be connected with the pressure releasing device in spark gap by insulator, so can reduce overvoltage protection device
Line loss, increase overvoltage protection device service life.And when installing overvoltage protection device,
Directly can be connected with insulator by the first terminals and the second terminals, so overvoltage guarantor is being installed
Need not break insulated conductor when protecting device, and then seal waterproof problem, Bu Huiying without solving insulated conductor
Ring the mechanical stretching performance and used life of insulated conductor.Due to install overvoltage protection device time can be direct
It is connected with insulator by the first terminals and the second terminals, it is possible to insulator is not replaced,
Also it is not required to original circuit is modified.
In this external this utility model embodiment, overvoltage protection device can also include: connects strut plate 15,
As shown in Figure 2.Wherein connecting strut plate 15 is a tunable arrangement, is used for adjusting current limiting element 11 He
The height of insulator, so that the bottom of current limiting element 11 and insulator is positioned in same level.Such as may be used
To adjust the nut connected on strut plate 15, current limiting element 11 and insulator while adjusting nut
Highly it is adjusted, stops adjusting after the bottom making current limiting element 11 and insulator is positioned in same level.
Before address, the electric current on insulated conductor can flow through wire drainage ball 12 and current limiting element 11, for
Make electric current can flow to current limiting element 11 smoothly, arrange between wire drainage ball 12 and current limiting element 11
There is a current limiting element drainage ball 16, as it is shown on figure 3, to guide electric current into current limliting unit from wire drainage ball 12
Part 11.
Here should be noted that a bit: when insulated conductor is properly functioning, overvoltage protection device is not subject to
Continue the effect of power current, be in the negative electricity rate of the current limiting element of rest device (the most non-duty)
Value can be higher so that the residual voltage of current limiting element decreases；When current limiting element is at the thunder of certain amplitude
After causing the series gap between overvoltage protection device and insulator to diminish under electricity overvoltage effect, current limliting unit
Part is the most in running order, and therefore the external insulation level of overvoltage protection device can be less than gapless arrestyer
External insulation level.And on properly functioning insulated conductor, insulated conductor has enough overvoltage resistance to
By ability, therefore the series gap size between overvoltage protection device and insulator may select and avoids operating
Voltage power supply, to alleviate current limiting element operating duty ability.Wherein the negative electricity rate of current limiting element value,
Series gap between the residual voltage of current limiting element, overvoltage protection device and insulator is according to insulated conductor not
Different together, it is not any limitation as by this this utility model.
It should be noted that in this article, the relational terms of such as first and second or the like is used merely to
One entity is made a distinction with another entity, and not necessarily requires or imply and deposit between these entities
Relation in any this reality.And, term " includes ", " comprising " or its any other variant are intended to
Contain comprising of nonexcludability, so that equipment not only includes those key elements, but also include the brightest
Other key elements really listed, or also include the key element that equipment is intrinsic.In the feelings not having more restriction
Under condition, statement " including ... " key element limited, it is not excluded that there is also other phase in a device
Same key element.
Described above to the disclosed embodiments, makes those skilled in the art be capable of or uses this reality
With novel.Multiple amendment to these embodiments will be apparent from for a person skilled in the art,
Generic principles defined herein can in the case of without departing from spirit or scope of the present utility model,
Realize in other embodiments.Therefore, this utility model is not intended to be limited to these realities shown in this article
Execute example, and be 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 is noted that for the art
Those of ordinary skill for, on the premise of without departing from this utility model principle, it is also possible to 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 and the second conductive pole；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, and the other end of described current limiting element connects described second conductive pole.
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 |
|---|---|---|---|
| CN201520877349.3U CN205509485U (en) | 2015-11-05 | 2015-11-05 | Over -voltage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520877349.3U CN205509485U (en) | 2015-11-05 | 2015-11-05 | Over -voltage protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205509485U true CN205509485U (en) | 2016-08-24 |
Family
ID=56720311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520877349.3U Active CN205509485U (en) | 2015-11-05 | 2015-11-05 | Over -voltage protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205509485U (en) |
-
2015
- 2015-11-05 CN CN201520877349.3U patent/CN205509485U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |