CN203826900U - Lightning conductor isolator - Google Patents
Lightning conductor isolator Download PDFInfo
- Publication number
- CN203826900U CN203826900U CN201420209896.XU CN201420209896U CN203826900U CN 203826900 U CN203826900 U CN 203826900U CN 201420209896 U CN201420209896 U CN 201420209896U CN 203826900 U CN203826900 U CN 203826900U
- Authority
- CN
- China
- Prior art keywords
- insulating support
- isolator
- lightning conducter
- lightning
- lightning conductor
- Prior art date
- 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
Links
- 239000004020 conductor Substances 0.000 title abstract description 12
- 239000000463 material Substances 0.000 claims description 11
- 229920000260 silastic Polymers 0.000 claims description 11
- 239000011521 glass Substances 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 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 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Landscapes
- Insulators (AREA)
Abstract
The utility model discloses a lightning conductor isolator, and belongs to the technical field of lightning protection in power systems. The lightning conductor isolator comprises an insulating bracket. A non-linear resistance element is disposed in the insulating bracket. Two ends of the non-linear resistance element are connected to two conduction members respectively. The conduction members extend out of the outer surface of the insulating bracket. The lightning conductor isolator is used for separating a lightning conductor and a tower. Under normal circumstances, the resistance of the non-linear resistance element is infinite, and the distributed capacitance between wires and the earth can be effectively reduced, so that the power grid can remain stable; and when the lightning conductor suffers lightning or an induced current occurs, the potential of the lightning conductor exceeds the threshold of the lightning conductor isolator, the resistance of the non-linear resistance element plummets to zero, and the lightning conductor isolator is conducted transiently to release high voltage. According to the utility model, the lightning conductor isolator can effectively reduce the distributed capacitance between the wires and the earth, so that the power grid can remain stable.
Description
Technical field
The utility model belongs to electric power system shocking preventing technology field, relates in particular to a kind of lightning conducter isolator.
Background technology
Lightning conducter (also claiming overhead ground wire) is that protection power transmission sequence is exempted from one of thunderstruck facility, and as lightning protection, it is the top that is erected at power transmission sequence head of mast and is arranged at transmission pressure.Utilizing the tower body of steel tower and the reinforcing bar in concurrent or electric pole special ladder, down conductor etc. to draw is connected with earthing device (earth mat) down.According to current standard, China's rules regulation 110kV Above Transmission Lines generally should be installed lightning conducter completely.China's grid company, in order to ensure the circuit safety of transmitting electricity, exempts from thunderbolt, and general 35kV circuit has all been installed lightning conducter.
In transmission line, exist between wire and wire and the earth between distributed capacitance.The size of distributed capacitance is directly proportional to transmission line length, with square being inversely proportional to of distance.Lightning conducter, owing to being to be directly connected with the earth by shaft tower, is equivalent to the earth directly to further to transmission line, therefore, causes the distributed capacitance between wire and the earth greatly to increase.Distributed capacitance has serious negative effect to the transient characterisitics of electrical network and stability, affects the stable of electrical network, and power grid security is produced to great hidden danger.
Utility model content
Technical problem to be solved in the utility model is: a kind of lightning conducter isolator is provided, to solve existing lightning conducter, by shaft tower, is directly connected with the earth, increased the distributed capacitance between wire and the earth, affect the stable technical problem of electrical network.
For solving the problems of the technologies described above, the technical solution of the utility model is: lightning conducter isolator, comprise insulating support, and in described insulating support, be provided with nonlinear resistive element, the two ends of described nonlinear resistive element are all connected with conduction element, and described conduction element extends the outer surface of described insulating support.
As a kind of improvement, described conduction element comprises fixed part and the extension linking together by securing member, and described fixed part is connected with described nonlinear resistive element, and described extension stretches out the outer surface of described insulating support.
As further improvement, the outer surface of described insulating support is coated with silastic material, and described silastic material is provided with some full skirt shape projections that be arranged in parallel.
As further improvement, the two ends of described insulating support are equipped with U-shaped wire clamp.
As further improvement, in described insulating support, be provided with for the mounting groove of described nonlinear resistive element is installed, the two ends of described mounting groove are provided with for the installing hole of described conduction element is installed, and the bearing of trend of described mounting groove and the axis direction of described installing hole are perpendicular.
As further improvement, the support that described insulating support is made for pottery, glass or high molecular polymer.
Adopted after technique scheme, the beneficial effects of the utility model are: because lightning conducter isolator comprises insulating support, insulating support works to support lightning conducter, in described insulating support, be provided with nonlinear resistive element, the two ends of described nonlinear resistive element are all connected with conduction element, and described conduction element extends the outer surface of described insulating support; Thereby by lightning conducter isolator, lightning conducter and shaft tower are separated, under (there is no induced current or lightning current) under normal circumstances, it is infinitely great that nonlinear resistive element resistance is, and can effectively reduce the distributed capacitance between wire and the earth, makes electrical network keep stable; When lightning conducter is struck by lightning or have induced current, lightning conducter electrical potential difference surpasses the threshold values of lightning conducter isolator, and nonlinear resistive element resistance is die-offed to zero, and the instantaneous conducting of lightning conducter isolator, discharges high voltage.The lightning conducter isolator that the utility model provides can effectively reduce the distributed capacitance between wire and the earth, makes electrical network keep stable.
Because described conduction element comprises fixed part and the extension linking together by securing member, conduction element adopts Split type structure, is convenient to manufacture.
Because the outer surface of described insulating support is coated with silastic material, described silastic material is provided with some full skirt shapes projections that be arranged in parallel, and silastic material has good hydrophobicity, when rainy, is convenient to make current to flow away fast.
Because the two ends of described insulating support are equipped with U-shaped wire clamp, thereby be convenient to being connected of lightning conducter and insulating support, make easy-to-connect.
Owing to being provided with mounting groove in described insulating support, the two ends of described mounting groove are provided with installing hole, and the bearing of trend of described mounting groove and the axis direction of described installing hole are perpendicular, and the lightning conducter spacer structures that the utility model is provided is compact, are convenient to install.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is A-A cutaway view in Fig. 1;
Fig. 3 is the structural representation of insulating support in Fig. 1;
Fig. 4 is B-B cutaway view in Fig. 3;
Fig. 5 is that the utility model is used view;
In figure: 1, insulating support, 11, mounting groove, 12, installing hole, 2, nonlinear resistive element, 3, conduction element, 31, fixed part, 32, extension, 4, securing member, 5, silastic material, 51, full skirt shape projection, 6, U-shaped wire clamp, 7, shaft tower, 8, middle lightning conducter, 9, avris lightning conducter, 10, downlead, 101, earthing device, the 102, first wire.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Shown in common as shown in Figure 1 to Figure 4, a kind of lightning conducter isolator, comprises insulating support 1, is provided with nonlinear resistive element 2 in insulating support 1, and the two ends of nonlinear resistive element 2 are all connected with conduction element 3, and conduction element 3 extends the outer surface of insulating support 1.
The piezoresistive element that nonlinear resistive element 2 can adopt zinc oxide to make.
For the ease of manufacturing, conduction element 3 adopts Split type structure, conduction element 3 comprises fixed part 31 and the extension 32 linking together by securing member 4, securing member 4 can adopt screw, extension 32 can adopt conducting bolt, fixed part 31 is compressed together with nonlinear resistive element 2, and extension 32 stretches out the outer surface of insulating support 1, and fixed part 31 and extension 32 can adopt metal to make.
The outer surface of insulating support 1 is coated with silastic material 5, and silastic material 5 is provided with some full skirt shape projections 51 that be arranged in parallel, and silastic material 5 has good hydrophobicity, when rainy, is convenient to make current to flow away fast.
In order to make easy-to-connect, the two ends of insulating support 1 are equipped with U-shaped wire clamp 6, are convenient to being connected of lightning conducter and insulating support 1.Certainly, U-shaped wire clamp 6 also can adopt connecting bolt or other connectors etc., can realize, and those skilled in the art can select according to actual conditions, do not repeat them here.
In insulating support 1, be provided with for the mounting groove 11 of nonlinear resistive element 2 is installed, the two ends of mounting groove 11 are provided with for the installing hole 12 of conduction element 3 is installed, the axis direction of the bearing of trend of mounting groove 11 and installing hole 12 is perpendicular, the lightning conducter spacer structures that the utility model is provided is compact, is convenient to install.
The support that insulating support 1 is made for pottery, glass or high molecular polymer.
As shown in Figure 5, during use, both sides at shaft tower 7 all arrange lightning conducter isolator, two lightning conducter isolators are divided into one section of middle lightning conducter 8 and two sections of avris lightning conducters 9 away from shaft tower 7 by lightning conducter, the U-shaped wire clamp 6 of insulating support 1 one end connects the avris lightning conducter 9 of respective side, the U-shaped wire clamp 6 of the other end connects shaft tower 7 by middle lightning conducter 8, insulating support 1 works to support lightning conducter, conduction element 3 near shaft tower 7 connects downlead 10, these downlead 10 connecting earthing devices 101, this earthing device 101 is embedded in the earth; Conduction element 3 away from shaft tower 7 connects the avris lightning conducter 9 of respective side by the first wire 102.By lightning conducter isolator, lightning conducter and shaft tower 7 are separated, under (there is no induced current or lightning current) under normal circumstances, it is infinitely great that nonlinear resistive element 2 resistance are, lightning conducter and downlead 10 are off state, then be off state with earthing device 101, therefore increased the distance, particularly top conductor line of wire and the earth, reduced the distributed capacitance between wire and the earth, made electrical network keep stable.
When lightning conducter is struck by lightning or have induced current, lightning conducter electrical potential difference surpasses the threshold values of lightning conducter isolator, nonlinear resistive element 2 resistance are die-offed to zero, the instantaneous conducting of lightning conducter isolator, two avris lightning conducters 9, the first wire 102, lightning conducter isolator, downlead 10, earthing device 101 is channel status, electric current will leak into the earth moment, thereby high voltage is discharged, in the time of within electric potential balancing arrives set scope, nonlinear resistive element 2 resistance of lightning conducter isolator return to infinity, make avris lightning conducter 9 and downlead 10 be open-circuit condition, return to normal range (NR).
The lightning conducter isolator that the utility model provides can effectively reduce the distributed capacitance between wire and the earth, makes electrical network keep stable.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection range of the present utility model.
Claims (6)
1. lightning conducter isolator, is characterized in that, comprises insulating support, in described insulating support, is provided with nonlinear resistive element, and the two ends of described nonlinear resistive element are all connected with conduction element, and described conduction element extends the outer surface of described insulating support.
2. lightning conducter isolator according to claim 1, it is characterized in that, described conduction element comprises fixed part and the extension linking together by securing member, and described fixed part is connected with described nonlinear resistive element, and described extension stretches out the outer surface of described insulating support.
3. lightning conducter isolator according to claim 1 and 2, is characterized in that, the outer surface of described insulating support is coated with silastic material, and described silastic material is provided with some full skirt shape projections that be arranged in parallel.
4. lightning conducter isolator according to claim 3, is characterized in that, the two ends of described insulating support are equipped with U-shaped wire clamp.
5. lightning conducter isolator according to claim 4, it is characterized in that, in described insulating support, be provided with for the mounting groove of described nonlinear resistive element is installed, the two ends of described mounting groove are provided with for the installing hole of described conduction element is installed, and the bearing of trend of described mounting groove and the axis direction of described installing hole are perpendicular.
6. lightning conducter isolator according to claim 5, is characterized in that, the support that described insulating support is made for pottery, glass or high molecular polymer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420209896.XU CN203826900U (en) | 2014-04-25 | 2014-04-25 | Lightning conductor isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420209896.XU CN203826900U (en) | 2014-04-25 | 2014-04-25 | Lightning conductor isolator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203826900U true CN203826900U (en) | 2014-09-10 |
Family
ID=51482364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420209896.XU Expired - Fee Related CN203826900U (en) | 2014-04-25 | 2014-04-25 | Lightning conductor isolator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203826900U (en) |
-
2014
- 2014-04-25 CN CN201420209896.XU patent/CN203826900U/en not_active Expired - Fee Related
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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: 20140910 Termination date: 20200425 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |