CN201072678Y - Composite casing metal oxide arrester for maintenance-free alternating current electric power line - Google Patents
Composite casing metal oxide arrester for maintenance-free alternating current electric power line Download PDFInfo
- Publication number
- CN201072678Y CN201072678Y CNU2007200864822U CN200720086482U CN201072678Y CN 201072678 Y CN201072678 Y CN 201072678Y CN U2007200864822 U CNU2007200864822 U CN U2007200864822U CN 200720086482 U CN200720086482 U CN 200720086482U CN 201072678 Y CN201072678 Y CN 201072678Y
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- Prior art keywords
- arrester
- lightning arrester
- metal oxide
- insulator
- disconnector
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Abstract
The maintenance free metal oxide arrester compounded with coating for alternating current transmission line is provided, which belongs to a protective device used for protecting the electrical equipment of 33 to 500KV in the alternating-current system or the insulator of the transmission line from the thunderbolt or overvoltage damage (or flashover) in operation. The utility model comprises a connecting terminal, an arrester body, a disconnector, a support insulator and an electrode gap, wherein, the support insulator is linked with the arrester body by the connecting hardware fittings. One end of the electrode gap is fixed on the bracket of fixed end by passing through the screw, while the disconnector at another end is connected with the electrode gap by the bolt and bracket. Both ends of the whole body of the arrester are separately fixed on the iron tower and transmission lead through the connecting terminals. The utility model and the arrester in series-parallel connection with the insulator of the protected lines can effectively improve the lightning resisting level of the lines, lower the trip-out rate and improve the reliability of the electric network operation.
Description
Technical field
The utility model belongs to protection 33～500KV AC system electric equipment or electric transmission line isolator etc. and avoids the protective device that overvoltage such as thunder and lightning and operation are damaged (or flashover).Specifically a kind of non-maintaining transmission line of alternation current polymeric metal oxide surge arrester.
Background technology
Before the utility model proposes, in order to reduce the lightning strike accident of power circuit, improve power supply reliability, the someone has proposed to install on the line the method that lightning arrester reduces the circuit lightning strike accident.From beginning in 1980, carried out the application zinc oxide arrester abroad and carried out the research of electric power system lightning protection, and after this successfully lightning arrester has been applied on the transmission line.But the cost of traditional silicon carbide valve type arrester is higher, and needs frequent maintenance prerun, dismounting to bring very big inconvenience, has limited its large tracts of land and has used.
Summary of the invention
The utility model provides a kind of polymeric metal oxide surge arrester that the littler discharge capacity of pressure ratio is bigger, reliability is higher, anti-pollution characteristic is stronger that has, to reach when lightning arrester year after for a long time aging or damage, the separator auto-action, fault phase lightning arrester and system are broken away from, the purpose of existing non-maintaining operation.
The realization the technical solution of the utility model is:
This non-maintaining transmission line of alternation current polymeric metal oxide surge arrester (hereinafter to be referred as lightning arrester) structure is made up of splicing ear, lightning arrester body, disconnector, supporting insulator, clearance electrode, wherein supporting insulator links to each other with lightning arrester body by connecting gold utensil, clearance electrode one end passes screw and is fixed on the stiff end support, other end disconnector links to each other with clearance electrode with support by bolt, and the whole two ends of lightning arrester are individually fixed on iron tower and the transmission pressure by splicing ear.
Operation principle of the present utility model is:
Lightning arrester by the metal oxide non-linear resistor as the main protection element.Lightning arrester is in parallel with protected equipment; when the overvoltage of insulation such as harm electric equipment or transmission line occurring when system; lightning arrester is the low-resistance conducting state; overvoltage is limited in the permissible value scope; thereby the insulation of protection electric equipment is avoided destroying, or avoids the lightning stroke flashover of transmission line (or contact line etc.) insulator.Lightning arrester is the high resistant state of insulation under the normal working voltage, makes system and ground insulation.Lightning arrester inside is filled with the special arc suppression, and has explosion-proof, disengaging and multinomial technology such as non-maintaining.
The utility model and traditional silicon carbide valve type arrester are made the operation contrast test to be proved:
The utlity model has better, reliable non-maintaining operation characteristic, with the series-parallel lightning arrester of the insulator of protected circuit, it can effectively improve the lightning withstand level of circuit, reduces trip-out rate, improves the reliability of operation of power networks.
In the strong area of lightening activity, for the 110kV transmission line 1 group of lightning arrester is installed after, if the impulse earthed resistance R of thunderbolt shaft tower
1Be not more than 40 Ω, line lightning resisting level can be brought up to more than the 65kA.
The 500kV circuit is installed 1 group of lightning arrester in the strong area of lightening activity, even the shaft tower impulse earthed resistance reaches 40 Ω, lightning withstand level also can reach 350kA.
Description of drawings
The non-maintaining transmission line of alternation current of Fig. 1 the utility model polymeric metal oxide surge arrester structural representation
The pure air gap of Fig. 2 the utility model non-maintaining type lightning arrester schematic diagram
Fig. 3 the utility model tape insulation supports series gap non-maintaining type lightning arrester schematic diagram
Fig. 4 the utility model is not intended to crack, band separator non-maintaining type lightning arrester schematic diagram
In the accompanying drawing: splicing ear 1, lightning arrester body 2, disconnector 3, supporting insulator 4, clearance electrode 5, grading ring 6
Embodiment
The utility model specifically be divided into three kinds dissimilar: pure air gap non-maintaining type (seeing built-in Fig. 2), tape insulation support series gap non-maintaining type (seeing accompanying drawing 3) and no gap, are with separator non-maintaining type (seeing accompanying drawing 4).
Guest performer gap leakage conductor, the clearance electrode with optimized design, interpolar field intensity good uniformity, discharge dispersity is little, and lightning impulse discharge voltage deviation is little between the positive and negative polarity.When atmospheric over-voltage appears in system, accurate, the reliable discharge breakdown in air gap, lightning arrester body carries out current limliting, pressure limiting again.Thereby reliably prevented the flashover of respective lines insulator.When system normally moved, because the buffer action of air gap, lightning arrester body bore system voltage-be in " rests " state hardly, had effectively avoided resistor disc in the deterioration of system voltage for a long time, thereby had improved operational reliability.
No gap, band separator lightning arrester, when internal overvoltage such as atmospheric over-voltage and operation occurring when system, lightning arrester presents low resistance; with overvoltage Limiting at reduced levels; can avoid the overvoltage flashover of respective lines insulator, more can limit switching overvoltage, make the protection level better.When lightning arrester year after for a long time aging or damage, the separator auto-action reclosing device arc extinguishing of system protection (under the big afterflow by means of) makes the disengaging of fault phase lightning arrester and system.
Concrete mounting means is:
Tape insulation supports the series gap non-maintaining type: the lightning arrester upper end directly is hung on the installing rack on the iron tower, and lightning arrester guest performer clearance electrode lower end is connected with the system high pressure lead by drainage thread.According to shaft tower actual installation position and space situation, can select mounting meanss such as vertical, inclination for use.
Pure air gap non-maintaining type: in the installing rack of iron tower, guest performer gap top electrode is fixed in the lightning arrester lower end with bolt in the lightning arrester body upper end, and the major axis of its ellipse annular upper electrode is vertical with high-voltage conducting wires; The gap bottom electrode is anchored on the high-voltage conducting wires wire clamp, and the bottom electrode axially parallel is in high-voltage conducting wires.And note adjusting upper and lower electrode distance, make to meet the requirements prescribed.
No gap, band separator non-maintaining type: the lightning arrester body upper end directly is hung on the installing rack on the iron tower; Separator (having space insulator, disconnector, coupling bar and soft line an etc.) end links to each other with the lightning arrester body lower end, and the separator other end links to each other with high-voltage conducting wires.
Can seal in counter or monitor etc. between lightning arrester base plate and the installation ground plate, otherwise can be with the direct ground connection of base plate.
Claims (1)
1. non-maintaining transmission line of alternation current polymeric metal oxide surge arrester is made up of splicing ear, lightning arrester body, disconnector, supporting insulator, clearance electrode, it is characterized in that: supporting insulator links to each other with lightning arrester body by connecting gold utensil, clearance electrode one end passes screw and is fixed on the stiff end support, other end disconnector links to each other with clearance electrode with support by bolt, and the whole two ends of lightning arrester are individually fixed on iron tower and the transmission pressure by splicing ear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200864822U CN201072678Y (en) | 2007-08-16 | 2007-08-16 | Composite casing metal oxide arrester for maintenance-free alternating current electric power line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200864822U CN201072678Y (en) | 2007-08-16 | 2007-08-16 | Composite casing metal oxide arrester for maintenance-free alternating current electric power line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201072678Y true CN201072678Y (en) | 2008-06-11 |
Family
ID=39551235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200864822U Expired - Lifetime CN201072678Y (en) | 2007-08-16 | 2007-08-16 | Composite casing metal oxide arrester for maintenance-free alternating current electric power line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201072678Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106251995A (en) * | 2016-09-12 | 2016-12-21 | 红光电气集团有限公司 | A kind of anti-lightening protector |
| CN109243733A (en) * | 2018-11-02 | 2019-01-18 | 西安神电高压电器有限公司 | A kind of high-voltage resistor |
-
2007
- 2007-08-16 CN CNU2007200864822U patent/CN201072678Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106251995A (en) * | 2016-09-12 | 2016-12-21 | 红光电气集团有限公司 | A kind of anti-lightening protector |
| CN106251995B (en) * | 2016-09-12 | 2018-09-21 | 红光电气集团有限公司 | A kind of anti-lightening protector |
| CN109243733A (en) * | 2018-11-02 | 2019-01-18 | 西安神电高压电器有限公司 | A kind of high-voltage resistor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE NETWORK ELECTRIC POWER RESEARCH INSTITUTE WU Free format text: FORMER OWNER: WUHAN HUARUI LIGHTNING PROTECTION TECHNOLOGY CO., LTD. Effective date: 20090911 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090911 Address after: Hubei province Wuhan city Hongshan District Luoyu road 143, zip code: 430074 Patentee after: Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute Address before: Luoyu Road, Hubei province Wuhan city Hongshan District No. 143, zip code: 430074 Patentee before: WUHAN WHVRI LIGHTNING PROTECTION SCIENCE AND TECHNOLOGY STOCK Co.,LTD |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080611 |