CN114914043A - Novel lightning protection device - Google Patents
Novel lightning protection device Download PDFInfo
- Publication number
- CN114914043A CN114914043A CN202210596957.1A CN202210596957A CN114914043A CN 114914043 A CN114914043 A CN 114914043A CN 202210596957 A CN202210596957 A CN 202210596957A CN 114914043 A CN114914043 A CN 114914043A
- Authority
- CN
- China
- Prior art keywords
- insulator
- lightning protection
- arrester
- protection device
- supporting
- 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.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
- H01C7/12—Overvoltage protection resistors; Arresters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/14—Supporting insulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
- H01C7/105—Varistor cores
- H01C7/108—Metal oxide
- H01C7/112—ZnO type
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T4/00—Overvoltage arresters using spark gaps
- H01T4/10—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G13/00—Installations of lightning conductors; Fastening thereof to supporting structure
- H02G13/80—Discharge by conduction or dissipation, e.g. rods, arresters, spark gaps
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Insulators (AREA)
Abstract
The invention discloses a novel lightning protection device, which comprises a high-voltage soft lead, a supporting insulator, a high-voltage discharge ball, a lower drainage ball, a lightning arrester body, a lightning protection base and a hoop, wherein an insulator lower electrode of the supporting insulator and a lightning arrester lower electrode of the lightning arrester body are respectively connected to one side of the lightning protection base, and a V-shaped included angle is formed between the supporting insulator and the lightning arrester body; the other side of the lightning protection base is connected with the hoop; the high-voltage discharge ball is arranged on an insulator upper electrode of the supporting insulator; the lower drainage ball is arranged on an upper arrester electrode of the arrester body; one end of the high-voltage soft lead is connected with an upper electrode of the insulator of the supporting insulator. The novel lightning protection device is supported by the supporting insulator, belongs to a fixed gap of a pure air gap, is not connected with the metal oxide lightning protection body in series, and simultaneously improves the creepage distance and the dry arc distance of the supporting insulator and the outer umbrella skirt of the lightning protection body, the whole bending resistance and the whole full insulation level.
Description
Technical Field
The invention relates to a novel lightning protection device.
Background
On the present 10kV insulation overhead line, two schemes are adopted domestically to solve the problem of overhead insulated conductor lightning stroke breakage: firstly, a dredging type lightning protection mode, such as a discharge hardware fitting and the like; and the other is a blocking type lightning protection mode, such as an overvoltage protector and the like.
Referring to fig. 1 to 5, the overvoltage protectors used in the prior art mainly include the following:
the conventional overvoltage protector structure is formed by connecting a discharge gap and a metal oxide arrester in series. The discharge gap is divided into a pure air gap and a discharge gap supported by a supporting insulator.
Wherein, pure air gap overvoltage protector: the lightning arrester consists of a ring-shaped, spherical or horn-shaped gap and a metal oxide lightning arrester body. Referring to fig. 1, the upper ends of the arrester body 11 'and the insulator 12' are connected by an arc striking ring 13', and the lower ends of the arrester body 11' and the insulator 12 'are connected by an arrester metal mounting bracket 14', an insulator mounting bracket 15 'and a gasket 16'; the insulator 12 'is mounted on an overhead insulated conductor 100'. The annular air gap 10 'of the overvoltage protector with the arc ignition ring 13' (ring electrode) is the distance between the overhead insulated conductor 100 'and the arc ignition ring 13'. Referring to fig. 2, the upper drainage ball 21 'is inserted into the overhead insulated conductor 100' by piercing or stripping, and the lower drainage ball 22 'is connected to the upper end of the metal oxide arrester 23': the lower end of the metal oxide arrester 23' is connected with the lower end of the insulator 24', the distance between the upper drainage ball 21' and the lower drainage ball 22' forms a spherical gap 20', the annular gap and the spherical gap are movable gaps, the distance of a pure air gap needs to be controlled during installation, the process is complicated, and the metal oxide arrester is easily influenced by manpower and other factors. Referring to fig. 3, an arrester horn 35 'is disposed at an upper end of the arrester body 31', an insulator horn 34 'is disposed at one end of the insulator hoop 33' at an upper end of the insulator 32', and a lower end of the arrester body 31' and a lower end of the insulator 32 'are connected by a metal mounting plate 36'. A horn-shaped gap 30' is formed between the arrester horn 35' and the insulator horn 34 '; the size of the horn-shaped gap 30' can be finely adjusted by adjusting the installation position of the insulator horn 34' on the insulator hoop 33 '.
The other is as follows: the support insulator supports the discharge gap: there can be two categories depending on the support insulator portion at the high voltage side or the low voltage side. Referring to fig. 4, the support insulator portion is at the low voltage end: the upper part of the overvoltage protector is a metal oxide arrester body 41', the upper end of the metal oxide arrester body 41' is connected with the overhead insulated conductor 100', the lower end of the metal oxide arrester body 41' is led out to form a discharge ball 42', and is simultaneously connected with a lower part supporting insulator 43', the supporting insulator 43' is partially arranged on the mounting plate 44', and a grounding drainage ball 45' is led out corresponding to the mounting plate 44', so that an air fixed gap 40' is formed. Although the gap distance is fixed, the instability of manual installation of the gap is solved, the metal oxide arrester body in the protector is constantly connected into a line system, the aging performance of the overvoltage protector is reduced, and the inspection and replacement work of the protector in a line is increased.
Referring to fig. 5, there is also a supporting insulator 52 'at the upper end and the lower end is the main body 51' of the arrester. The upper end and the lower end of the supporting insulator 52' are respectively led out with a discharging ball 53', 54', the upper end of the supporting insulator 52' is connected with a high-voltage lead through an Anpu wire clamp 55' to enable the upper end discharging ball 53' to be equipotential with the overhead insulated conductor 100', the lower end discharging ball 54' exists due to a fixed gap 50', the arrester is effectively isolated from a live-line system, but the supporting insulator needs to support a reasonable fixed gap distance, so that the overall size of the supporting insulator and the metal oxide arrester is longer, the size of a product is larger, and the mechanical bending resistance is not high.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a novel lightning protection device which is supported by a supporting insulator and belongs to a fixed gap of a pure air gap, the supporting insulator is not connected with a metal oxide lightning protection body in series, the creepage distance and the dry arc distance of an umbrella skirt outside the supporting insulator and the lightning protection body are increased, the integral bending resistance is improved, the structural size of a product is reduced, the integral full insulation level is improved, and the depth of a charged discharge ball is concealed.
The technical scheme for realizing the purpose is as follows: the utility model provides a novel lightning protection device, includes high-pressure soft lead wire, support insulator, high-pressure discharge ball, drainage ball, arrester body, lightning protection base and staple bolt down, wherein:
the supporting insulator consists of a core body and a silicon rubber umbrella skirt wrapped outside the core body, and the core body of the supporting insulator is formed by sequentially connecting an insulator lower electrode, an insulating rod and an insulator upper electrode;
the lightning arrester comprises a lightning arrester body and a silicon rubber umbrella skirt wrapped outside the lightning arrester body, wherein the lightning arrester body is formed by sequentially connecting a lightning arrester lower electrode, a valve plate group and a lightning arrester upper electrode.
The lower insulator electrode of the supporting insulator and the lower arrester electrode of the arrester body are respectively connected to one side of the lightning protection base, and a V-shaped included angle is formed between the supporting insulator and the arrester body;
the other side of the lightning protection base is connected with the hoop, the lightning protection base and the hoop are respectively connected with a grounding down lead, and the lightning arrester body is connected with the grounding down lead through the lightning protection base and the hoop;
the high-voltage discharge ball is arranged on the upper insulator electrode of the supporting insulator;
the lower drainage ball is arranged on an upper arrester electrode of the arrester body;
an air gap is formed between the high-voltage discharge ball and the lower drainage ball and is positioned on the inner side of a V-shaped included angle formed between the support insulator and the lightning arrester body;
one end of the high-voltage soft lead is connected with the upper electrode of the insulator of the supporting insulator, and the other end of the high-voltage soft lead is connected to the overhead insulated wire.
The novel lightning protection device is characterized in that the lightning arrester body is a metal oxide lightning arrester.
The novel lightning protection device is characterized in that the high-voltage soft lead is composed of a core wire and silicon rubber wrapped outside the core wire, and the core wire of the high-voltage soft lead is made of a soft copper wire.
The novel lightning protection device is characterized in that the high-voltage soft lead is directly connected into the overhead insulated conductor or is connected into the overhead insulated conductor through the drainage wire clamp.
The novel lightning protection device is characterized in that the hoop is mounted on the electric pole.
The novel lightning protection device is supported by the supporting insulator, belongs to a fixed gap of a pure air gap, is not connected with the metal oxide lightning protection body in series, improves the creepage distance and the dry arc distance of the umbrella skirt outside the supporting insulator and the lightning protection body, improves the whole bending resistance, reduces the structure size of the product, improves the whole full insulation level, and is internally provided with the charged discharge ball in depth.
Drawings
FIG. 1 is a schematic diagram of a pure air gap overvoltage protector (annular gap);
FIG. 2 is a schematic view of a pure air gap overvoltage protector (horn gap);
FIG. 3 is a schematic view of a pure air gap overvoltage protector (spherical gap);
fig. 4 is a schematic view of the support insulator supporting the discharge gap overvoltage protector (with the support insulator partially on the low voltage side);
fig. 5 is a schematic view of the support insulator supporting the discharge gap overvoltage protector (with the support insulator partially on the high side);
FIG. 6 is a perspective view of the lightning protection device of the present invention;
fig. 7 is a schematic view of the connection between the support insulator and the metal oxide arrester body of the novel lightning protection device of the invention.
Detailed Description
In order that those skilled in the art will better understand the technical solution of the present invention, the following detailed description is given with reference to the accompanying drawings:
referring to fig. 6 and 7, in the preferred embodiment of the present invention, a novel lightning protection device includes a high-voltage soft lead 1, a supporting insulator 2, a high-voltage discharging ball 3, a lower guiding ball 4, a lightning arrester body 5, a lightning protection base 6 and a hoop 7.
The supporting insulator 2 consists of a core body and a silicon rubber shed wrapping the core body, and the core body of the supporting insulator 2 is formed by sequentially connecting an insulator lower electrode 21, an insulating rod 22 and an insulator upper electrode 23; the height of the supporting insulator 2 and the plurality of sheds fully ensure the insulation level of the supporting insulator.
The lightning arrester body 5 is composed of a core body and a silicon rubber umbrella skirt wrapped outside the core body, and the core body of the lightning arrester body 5 is formed by injection molding or winding of a lightning arrester lower electrode 51, a valve plate group 52 and a lightning arrester upper electrode 53.
The insulator lower electrode 21 of the supporting insulator 2 and the arrester lower electrode 51 of the arrester body 5 are respectively connected to one side of the lightning protection base 6, and a V-shaped included angle is formed between the supporting insulator 2 and the arrester body 5; the other side of the lightning protection base 6 is connected with the hoop 7, the lightning protection base 6 and the hoop 7 are respectively connected with the grounding down lead, and the lightning arrester body 5 is connected with the grounding down lead through the lightning protection base 6 and the hoop 7; the high-voltage discharge ball 3 is arranged on the insulator upper electrode 23 of the supporting insulator 2 and is positioned on the inner side of the V-shaped included angle; the lower drainage ball 4 is arranged on the upper arrester electrode 53 of the arrester body 5 and is positioned on the inner side of the V-shaped clamp angle; an air gap is formed between the high-voltage discharge ball 3 and the lower drainage ball 4 and is positioned on the inner side of a V-shaped included angle formed between the support insulator and the lightning arrester body; one end of the high-voltage soft lead 1 is connected with the insulator upper electrode 23 of the supporting insulator 2, and the other end is connected to an overhead insulated wire.
The lightning arrester body 5 adopts a metal oxide lightning arrester.
The high-voltage soft lead 1 is composed of a core wire and silicon rubber wrapped outside the core wire, and the core wire of the high-voltage soft lead 1 is made of soft copper wires.
When the novel lightning protection device is used, the high-voltage soft lead is directly connected into the overhead insulated conductor or is connected into the overhead insulated conductor through the drainage wire clamp, the hoop 7 is installed on the electric pole, and the hoops 7 with different structures can be replaced according to actual use requirements. When the overhead insulated conductor is subjected to overvoltage such as lightning overvoltage or power frequency operation, the energy is directly led to the high-voltage discharge ball 3 through the high-voltage soft lead 1, and is rapidly discharged to the ground through the lightning arrester body 5 and the lightning arrester base 6 and the hoop 7 by puncturing an air gap to the lower discharge ball 4. Under the non-operating condition at ordinary times, by the air gap that high voltage discharge ball 3 and drainage ball 4 are constituteed, isolated system line and arrester body 5's direct connection.
The pure air gap of the novel lightning protection device is composed of a high-voltage discharge ball 3 on a supporting insulator 2 and a lower drainage ball 4 on a lightning arrester body 5; high-voltage discharge ball 3 and upper drainage ball 4 fixed structure have both guaranteed that air gap's formation is stable, have isolated line system again to arrester body 5 last power frequency effect. Because the supporting insulator 2 is not connected with the lightning arrester body 5 in series, the length of the product is shortened, and the mechanical bending resistance of the lightning arrester body 5 can be greatly improved.
Whole novel lightning protection device adopts injection silicon rubber integrated into one piece technology, inserts supporting insulator 2's insulator upper electrode 23 before the soft lead wire 1 shaping of high pressure, and high-pressure discharge ball 3 and drainage ball 4 are all concealed down, remove lightning protection base 6 and staple bolt 7 and insert the earth potential, all the other all insulation, improve lightning protection device's whole insulation level greatly, provide safer and more reliable lightning protection device for electrified installation lightning protection measure.
The novel lightning protection device is different from various lightning protection broken line overvoltage protectors on a 10kV insulated overhead line in structure, a systematic new structure design is carried out, the whole lightning protection device is of a V-shaped integrated structure, exposed metal parts except a high-voltage soft lead wiring end, a grounded lightning protection base 6 and a hoop 7 are not arranged, an additional outer sleeve insulating cover is not arranged, the full insulation level is higher, and the novel lightning protection device has positive significance in ecological coexistence with animals such as birds on the line.
The novel lightning protection device of the invention, although a high-voltage discharge ball is supported by a supporting insulator, belongs to a pure air series gap metal oxide lightning arrester. The umbrella skirt of the insulator supporting piece 2 fully ensures the insulation level of the insulator per se, ensures the pure air gap discharge stability under long-time use, and has more excellent pollution resistance.
According to the novel lightning protection device, the supporting insulator 2 and the lightning arrester body 5 are not connected in series, but are divided into two sections which are fixed on the lightning protection base 6, so that the size of the product is shortened, and the mechanical performance of the device and the flexibility of a specific installation and use space can be greatly improved. The lightning arrester body 5 can greatly improve the through-current capacity and the pollution resistance capacity on the basis of meeting the mechanical performance.
The novel lightning protection device is transversely arranged, the air gap is arranged on the inner side of the V-shaped included angle, the discharge balls are all hidden, birds can be prevented from flying or moving in the gap, high-altitude floating objects are not easy to hook, and the external damage prevention capability of the lightning protection device is improved.
The novel lightning protection device is very simple and convenient to install on site, the high-voltage soft lead is directly connected into an overhead insulated conductor system, the hoop 7 is installed on an electric pole or installed on a protected insulator installation frame through other installation plates, and the two steps are in place.
The novel lightning protection device, the V-shaped integrated forming and the high-voltage soft lead have higher requirements on the forming process of the product, and further requirements on the improvement of the forming level and the improvement of the production process are provided in the process of popularization, implementation and application.
The novel lightning protection device is a pure air gap type serial gap metal oxide lightning arrester, namely, the novel lightning protection device is a pure air gap type serial gap metal oxide lightning arrester, and the air gap of the novel lightning protection device is supported and fixed by the insulator, so that the influence caused by construction and installation can be avoided.
In conclusion, the novel lightning protection device is supported by the supporting insulator, belongs to a fixed gap of a pure air gap, is not connected with the lightning protection body of the metal oxide in series, improves the creepage distance and the dry arc distance of the umbrella skirt outside the supporting insulator and the lightning protection body, improves the whole bending resistance, reduces the structural size of the product, improves the whole full insulation level, and is internally provided with the charged discharge ball in depth.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210596957.1A CN114914043A (en) | 2022-05-30 | 2022-05-30 | Novel lightning protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210596957.1A CN114914043A (en) | 2022-05-30 | 2022-05-30 | Novel lightning protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114914043A true CN114914043A (en) | 2022-08-16 |
Family
ID=82769625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210596957.1A Pending CN114914043A (en) | 2022-05-30 | 2022-05-30 | Novel lightning protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114914043A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116613719A (en) * | 2023-06-05 | 2023-08-18 | 国网上海市电力公司 | 10KV lightning protection device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204441702U (en) * | 2015-02-02 | 2015-07-01 | 国网电力科学研究院武汉南瑞有限责任公司 | A kind of lightning stroke flashover restraint device for 110kV transmission line of alternation current |
| CN107293941A (en) * | 2017-07-21 | 2017-10-24 | 特瑞格（天津）科技有限公司 | A kind of multi-chamber arrester with series gaps |
| CN207116912U (en) * | 2017-08-30 | 2018-03-16 | 天津市玖仟电瓷电器股份有限公司 | A kind of new external series gap arrester device |
| CN110661173A (en) * | 2019-08-15 | 2020-01-07 | 国网河南省电力公司鹤壁供电公司 | Multi-chamber lightning flashover limiter |
| CN110993221A (en) * | 2019-12-26 | 2020-04-10 | 辽宁华隆电力科技股份有限公司 | Combined electrical apparatus for three-dimensional wound core transformer |
| CN217847573U (en) * | 2022-05-30 | 2022-11-18 | 国网上海市电力公司 | Novel lightning protection device |
-
2022
- 2022-05-30 CN CN202210596957.1A patent/CN114914043A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204441702U (en) * | 2015-02-02 | 2015-07-01 | 国网电力科学研究院武汉南瑞有限责任公司 | A kind of lightning stroke flashover restraint device for 110kV transmission line of alternation current |
| CN107293941A (en) * | 2017-07-21 | 2017-10-24 | 特瑞格（天津）科技有限公司 | A kind of multi-chamber arrester with series gaps |
| CN207116912U (en) * | 2017-08-30 | 2018-03-16 | 天津市玖仟电瓷电器股份有限公司 | A kind of new external series gap arrester device |
| CN110661173A (en) * | 2019-08-15 | 2020-01-07 | 国网河南省电力公司鹤壁供电公司 | Multi-chamber lightning flashover limiter |
| CN110993221A (en) * | 2019-12-26 | 2020-04-10 | 辽宁华隆电力科技股份有限公司 | Combined electrical apparatus for three-dimensional wound core transformer |
| CN217847573U (en) * | 2022-05-30 | 2022-11-18 | 国网上海市电力公司 | Novel lightning protection device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116613719A (en) * | 2023-06-05 | 2023-08-18 | 国网上海市电力公司 | 10KV lightning protection device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN217847573U (en) | Novel lightning protection device | |
| CN104715869A (en) | Insulator support fixed gap overvoltage protector | |
| CN100483170C (en) | Earthing mode of optical fiber compound overhead ground wire and earthing pilot arc clearance | |
| CN212113330U (en) | An insulator for easy distance adjustment | |
| CN204884740U (en) | Take 10kV circuit porcelain cross arm insulator lightning protection device of counter | |
| CN205610158U (en) | Insulated line overvoltage protector | |
| CN215934423U (en) | Lightning-proof overhead line for power engineering | |
| CN101232163A (en) | Protection method and device for gap lightning protection | |
| CN204496992U (en) | A kind of insulator supports fixed interval (FI) overvoltage protection device | |
| CN203674560U (en) | a tower | |
| CN212626517U (en) | 110kV lightning flashover protector | |
| CN220822628U (en) | Integral overvoltage protector | |
| CN108231300A (en) | A kind of parallel connection clearance device of anti-thunder insulator | |
| CN201298720Y (en) | A lightning protection device | |
| CN206195314U (en) | Insulator has cross arm of rain -proof cover | |
| CN116613719A (en) | 10KV lightning protection device | |
| CN108063029A (en) | A kind of Novel lightning-proof insulator | |
| CN201146358Y (en) | Gap lightning protection device | |
| CN101227071A (en) | 10kV distribution line insulation tower head | |
| CN204496989U (en) | A kind of novel insulator supporting gap | |
| CN218352134U (en) | Novel distribution network line overhead ground wire supporting cross arm | |
| CN215868826U (en) | An insulator lightning protection structure | |
| CN220527395U (en) | Multi-gap protection device and installation system thereof | |
| CN2404248Y (en) | Special lightning-protection & arc extinguishing device for high-voltage transmission line | |
| CN205692638U (en) | A kind of 35kV circuit lightning stroke flashover protector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |