CN202996460U - Lightning arrester and overvoltage protection device using the lightning arrester - Google Patents
Lightning arrester and overvoltage protection device using the lightning arrester Download PDFInfo
- Publication number
- CN202996460U CN202996460U CN 201220326173 CN201220326173U CN202996460U CN 202996460 U CN202996460 U CN 202996460U CN 201220326173 CN201220326173 CN 201220326173 CN 201220326173 U CN201220326173 U CN 201220326173U CN 202996460 U CN202996460 U CN 202996460U
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- Prior art keywords
- lightning arrester
- overvoltage protection
- sensitive resistor
- conductive tube
- gap
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- 239000012212 insulator Substances 0.000 claims description 17
- 239000004593 Epoxy Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000001012 protector Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000034 method Methods 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
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model relates to a lightning arrester, comprising an insulation sleeve, wherein an upper electrode and a lower electrode are respectively arranged on an upper and a lower ends of the insulation sleeve, the insulation sleeve has a cylinder chamber, a conductive barrel is arranged in the chamber, an upper end of the conductive barrel is contacted to the upper electrode, and a lower end of the conductive barrel is contacted to the lower electrode, at least one Al-series ZnO pressure-sensitive resistor and at least one gap are arranged in the conductive barrel, the gap is arranged on the ZnO pressure-sensitive resistor and is mutually connected with the ZnO pressure-sensitive resistor, and the upper end of the gap and the lower end of the ZnO pressure-sensitive resistor are all connected with the conductive barrel by a conducting ring. Al is added in the ZnO pressure-sensitive resistor of the lightning arrester, and the Al ion can effectively reduce the resistivity and residual voltage of the ZnO pressure-sensitive resistor, that is the lightning arrester has a flatter volt-ampere characteristic and a smaller impact coefficient. When used in an overvoltage protection device, the lightning arrester can reduce the insulation requirement of an electric power, can simplify insulation equipment and can reduce manufacture cost while raises the overvoltage protection level. The utility model further provides an overvoltage protection device using the lightning arrester.
Description
Technical field
The utility model belongs to circuit on power system and equipment over-voltage protection technique field, the overvoltage protection device that relates in particular to a kind of lightning arrester and contain this lightning arrester.
Background technology
Along with the raising of electric pressure, the Hyper-Voltage of Power Systems problem also becomes increasingly conspicuous, and need to effectively limit to protect the insulation of high-tension apparatus and circuit not to be destroyed to overvoltage.
Overvoltage protection device is a kind of device of electric power system high-tension apparatus overvoltage protection.The operation principle of this device is as follows: the drainage system of overvoltage protection device is in parallel with insulator; when thunderbolt shaft tower or lightning conducter; the high potential that lightning current causes makes the series gap work of line protector; reduced the potential difference between tower arm and wire; guarantee no longer flashover of insulator, thereby avoid line tripping to have a power failure.After the series gap action, the residual voltage of overvoltage protection device body not only is limited to the interior flashover voltage far below insulator, and under superpotential system frequency voltage, can oneself extinguish power frequency continued flow, guarantees normal power supply.
Overvoltage protection device is mainly to have protector device body and drainage system to consist of, and what protector device body generally used is metal oxide arrester, and its overvoltage protection level has determined the insulator arrangement of electric power system various device to a great extent.The ZnO varistor valve block is the core component in lightning arrester, has good nonlinear characteristic and higher energy absorption capability, over-voltage effectively.Maximum voltage peak value when the residual voltage of Zno varistor is defined as discharging current by lightning arrester between its terminal.Traditional ZnO varistor has higher residual voltage, and the insulation level of electric power system is determined by the residual voltage level.If the ZnO varistor of using in lightning arrester has the residual characteristic of low pressure, in the time of with the raising overvoltage protection level, also will greatly reduce the power system insulation requirement, simplify insulator arrangement, reduce manufacturing cost.
The utility model content
The purpose of this utility model is to provide a kind of lightning arrester with low-resistivity and low residual voltage ratio.
Concrete technical scheme of the present utility model is as follows:
A kind of lightning arrester, comprise insulating case, the two ends up and down of insulating case are respectively equipped with top electrode and bottom electrode, described insulating case has a chamber, is provided with conductive tube in its chamber, and the upper end of conductive tube contacts with top electrode, the lower end contacts with bottom electrode, it is ZnO varistor and at least one gap that the conductive tube the inside is provided with at least one Al, and the gap is positioned on ZnO varistor and interconnects, and the upper end in gap and the lower end of ZnO varistor all are connected with conductive tube by conducting ring.
It is ZnO varistor and 3 gaps that the conductive tube the inside is provided with 3 Al, and 3 gaps are in turn connected to form dwell set, and 3 Al are connected with dwell set after ZnO varistor connects successively, and dwell set is positioned on piezo-resistance.
Above-mentioned conductive tube is epoxy cylinder.
The utility model also relates to the overvoltage protection device that adopts above-mentioned lightning arrester; comprise lightning arrester, insulator, draining ring and support; one end of support is connected with the lower end of insulator; the other end of support is connected with the lower end of lightning arrester; described draining ring comprises annulus and extension; its extension is connected with the upper end of lightning arrester, and its annulus is enclosed within on insulator.
The ZnO varistor that adopts in lightning arrester of the present utility model adds Al, the Al ion can reduce resistivity and the residual voltage ratio of ZnO varistor effectively, ZnO varistor has the residual characteristic of low pressure, that is to say that lightning arrester has more smooth voltage-current characteristic, less impact coefficient; When this lightning arrester is used for overvoltage protection device, can cross when improving overvoltage protection level, also will greatly reduce the power system insulation requirement, simplify insulator arrangement, reduce manufacturing cost.
Description of drawings
Fig. 1 is the structural representation of lightning arrester of the present utility model;
Fig. 2 is the structural representation of overvoltage protection device of the present utility model;
Fig. 3 is the vertical view of draining ring in Fig. 2.
Embodiment
Further illustrate the utility model below in conjunction with accompanying drawing.
" Al is ZnO varistor " described in the application refers to the ZnO varistor that contains the Al element.
referring to Fig. 1, lightning arrester 1 comprises insulating case 7, the two ends up and down of insulating case 7 are respectively equipped with top electrode 2 and bottom electrode 5, the lower end of bottom electrode 5 is provided with connector 6, connector 6 can be bolt, described insulating case 7 has a chamber, be provided with conductive tube 8 in its chamber, described conductive tube 8 is epoxy cylinder, the upper end of conductive tube 8 contacts with top electrode 2, its lower end contacts with bottom electrode 5, it is ZnO varistor 4 and 3 gaps 3 that conductive tube 8 the insides are provided with 3 Al, 3 gaps connect rear formation dwell set successively, 3 Al are that ZnO varistor connects integral body of rear formation successively hereinafter to be referred as " piezo-resistance ", piezo-resistance is connected with dwell set, dwell set is positioned on piezo-resistance.The upper end of dwell set is connected with conductive tube 8 by conducting ring 9, and the lower end of piezo-resistance is also to be connected with conductive tube 8 by conducting ring.
Referring to Fig. 2; adopt the overvoltage protection device of above-mentioned lightning arrester; comprise lightning arrester 1, insulator 12, draining ring 13 and support 10; insulator 12 is connected with fixed part 11; insulator 12 is connected with an end of support 10 by fixed part 11, and lightning arrester 1 is connected with the other end of support 10 by connector 6.Referring to Fig. 3, draining ring 13 comprises annulus 15 and extension 14, extension 14 is connected with the upper end of lightning arrester 1, and its annulus 15 is enclosed within on insulator 12, between draining ring 13 and lightning arrester 1 and the connected mode between draining ring 13 and insulator 12 all adopt existing connected mode.
Certainly, above is only concrete exemplary applications of the present utility model, and protection range of the present utility model is not constituted any limitation.In addition to the implementation, the utility model can also have other execution modes.All employings are equal to the technical scheme of replacement or equivalent transformation formation, within all dropping on the utility model scope required for protection.
Claims (4)
1. lightning arrester, it is characterized in that comprising insulating case, the two ends up and down of insulating case are respectively equipped with top electrode and bottom electrode, described insulating case has a chamber, is provided with conductive tube in its chamber, and the upper end of conductive tube contacts with top electrode, the lower end contacts with bottom electrode, it is ZnO varistor and at least one gap that the conductive tube the inside is provided with at least one Al, and the gap is positioned on ZnO varistor and interconnects, and the upper end in gap and the lower end of ZnO varistor all are connected with conductive tube by conducting ring.
2. lightning arrester according to claim 1, it is characterized in that it is ZnO varistor and 3 gaps that conductive tube the inside is provided with 3 Al, 3 gaps are in turn connected to form dwell set, and 3 Al are connected with dwell set after ZnO varistor connects successively, and dwell set is positioned on piezo-resistance.
3. lightning arrester according to claim 1 and 2, is characterized in that described conductive tube is epoxy cylinder.
4. adopt the overvoltage protection device of the described lightning arrester of above-mentioned arbitrary claim; it is characterized in that comprising lightning arrester, insulator, draining ring and support; one end of support is connected with the lower end of insulator; the other end of support is connected with the lower end of lightning arrester; described draining ring comprises annulus and extension; its extension is connected with the upper end of lightning arrester, and its annulus is enclosed within on insulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220326173 CN202996460U (en) | 2012-07-06 | 2012-07-06 | Lightning arrester and overvoltage protection device using the lightning arrester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220326173 CN202996460U (en) | 2012-07-06 | 2012-07-06 | Lightning arrester and overvoltage protection device using the lightning arrester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202996460U true CN202996460U (en) | 2013-06-12 |
Family
ID=48567606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220326173 Expired - Fee Related CN202996460U (en) | 2012-07-06 | 2012-07-06 | Lightning arrester and overvoltage protection device using the lightning arrester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202996460U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103730216A (en) * | 2014-01-16 | 2014-04-16 | 国家电网公司 | 10KV wiring circuit lightning protection device |
-
2012
- 2012-07-06 CN CN 201220326173 patent/CN202996460U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103730216A (en) * | 2014-01-16 | 2014-04-16 | 国家电网公司 | 10KV wiring circuit lightning protection device |
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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: 20130612 Termination date: 20150706 |
|
| EXPY | Termination of patent right or utility model |