CN104008828B - A kind of discharging gap apparatus - Google Patents
A kind of discharging gap apparatus Download PDFInfo
- Publication number
- CN104008828B CN104008828B CN201410257130.3A CN201410257130A CN104008828B CN 104008828 B CN104008828 B CN 104008828B CN 201410257130 A CN201410257130 A CN 201410257130A CN 104008828 B CN104008828 B CN 104008828B
- Authority
- CN
- China
- Prior art keywords
- fixed plate
- fastener
- gap
- head end
- bottom electrode
- 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.)
- Active
Links
- 238000007599 discharging Methods 0.000 title claims abstract description 39
- 239000000789 fastener Substances 0.000 claims abstract description 49
- 239000012212 insulator Substances 0.000 claims abstract description 44
- 238000005452 bending Methods 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 210000003127 Knee Anatomy 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000005684 electric field Effects 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000037250 Clearance Effects 0.000 abstract description 4
- 230000035512 clearance Effects 0.000 abstract description 4
- 238000010891 electric arc Methods 0.000 description 12
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 6
- 239000010931 gold Substances 0.000 description 6
- 229910052737 gold Inorganic materials 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 241000883966 Astrophytum capricorne Species 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 210000004907 Glands Anatomy 0.000 description 1
- 210000003284 Horns Anatomy 0.000 description 1
- 206010042255 Struck by lightning Diseases 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Abstract
The invention discloses a kind of discharging gap apparatus, the discharging gap apparatus are located on ground insulator string, the discharging gap apparatus include the first fastener, second fastener, first fixed plate, second fixed plate, Top electrode and bottom electrode, first fixed plate head end is fixed on the high-pressure side of ground insulator string by the first fastener, the end of the first fixed plate connects the head end of Top electrode, the end of Top electrode is trick arc end, second fixed plate head end is fixed on the low-pressure end of ground insulator string by the second fastener, the end connection bottom electrode head end of the second fixed plate, the end arc end of bottom electrode, arc end is recruited to leave space with arc end.Beneficial effects of the present invention：Ground insulator gap is adjustable clearance, if gap is unsatisfactory for ground wire deicing or lightning protection properties requirement in Practical Project, can be adjusted, simple operation.
Description
Technical field
The present invention relates to a kind of discharging gap apparatus.
Background technology
Discharging gap is the conventional gas discharge device of High-Voltage Technology, is generally used to control the break-make of high voltage circuit,
Various overvoltage are prevented using the intermediate air gap discharging in advance of the structure（Such as thunder and lightning, operation overvoltage）To gland high
The protection of the high-tension apparatuses such as pipe, effect is analogous to arrester and overvoltage protection device.Discharging gap is generally made up of two electrodes,
One connects high-pressure side, and another connects low-pressure end, is state of insulation between two electrodes, is hit when the voltage between two electrodes reaches
When wearing voltage, insulate breakdown into conducting state, after afterflow disappearance, become exhausted due to having between two electrodes of self- recoverage for insulating
Edge state, so that loop is off again.
Transmission line of electricity is located in wilderness, is easily struck by lightning.Near the direct attack lightning overvoltage and thunderbolt circuit caused by thunderbolt circuit
The lightning induced voltage that ground causes, i.e., the atmospheric over-voltage often occurred on so-called transmission line of electricity.Insulator caused by it dodges
Network, line tripping and lightning surge intrusion electric substation damage electrical equipment accident and occupy significant portion in the total accident of power network.
Therefore, to solve the above problems, spy provides a kind of new technical scheme.
The content of the invention
The present invention provides a kind of discharging gap apparatus.
The technical solution adopted by the present invention is：
A kind of discharging gap apparatus, the discharging gap apparatus are located on ground insulator string, the discharging gap apparatus bag
The first fastener, the second fastener, the first fixed plate, the second fixed plate, Top electrode and bottom electrode are included, described first fixes wrench
The high-pressure side of ground insulator string is fixed at end by the first fastener, and the end of the first fixed plate connects the head end of Top electrode,
To recruit arc end, the second fixed plate head end is fixed on ground insulator string by the second fastener for the end of the Top electrode
Low-pressure end, the end connection bottom electrode head end of the second fixed plate, the end arc end of the bottom electrode, the trick arc end and striking
Leave space in end.
The trick arc end bends from lower to upper, and the arc end bends from top to bottom.
The angle that the angle for recruiting arc end to bend from lower to upper and arc end bend from top to bottom is 30-45 °.
A kind of discharging gap apparatus, the discharging gap apparatus are located on ground insulator string, the discharging gap apparatus bag
Include the first fastener, the second fastener, the 3rd fastener, the 4th fastener, the first fixed plate, the second fixed plate, Top electrode and
Bottom electrode, the first fixed plate head end is fixed on the high-pressure side of ground insulator string, the first fixed plate by the first fastener
The end head end perpendicular fastener that passes through the 3rd fastener and Top electrode, the second fixed plate head end consolidated by the second fastener
Due to the low-pressure end of ground insulator string, the end of the second fixed plate passes through the 4th fastener and bottom electrode head end perpendicular fastener,
The bottom electrode tilts upward bending by middle part, and space is left in the Top electrode end with the bending section of bottom electrode.
Angle of inclination in the middle part of the bottom electrode is 130-140 °.
A kind of discharging gap apparatus, the discharging gap apparatus are located on ground insulator string, the discharging gap apparatus bag
The first fastener, the second fastener, the first fixed plate, the second fixed plate, Top electrode and bottom electrode are included, described first fixes wrench
The high-pressure side of ground insulator string is fixed at end by the first fastener, and the end of the first fixed plate connects the head end of Top electrode,
The first fixed plate end forms angle with Top electrode head end, and the second fixed plate head end is fixed on by the second fastener
The low-pressure end of ground insulator string, the end connection bottom electrode head end of the second fixed plate, the second fixed plate end and lower electricity
Cartridge end is vertical, and the bottom electrode tilts upward bending by middle part, the junction of the first fixed plate and Top electrode and under
Leave gap and tip is installed in gap location in the knee of electrode.
The Top electrode is made up of band iron, and bottom electrode is made up of round steel.
Shape is angled 45-135 ° between first fixed plate end and Top electrode head end, the oblique bending in the middle part of bottom electrode
Angle be 130-140 °.
The beneficial effects of the invention are as follows：Ground insulator gap is adjustable clearance, if gap is discontented in Practical Project
Sufficient ground wire deicing or lightning protection properties requirement, can be adjusted, simple operation；
It is effective lightning protection device, insulator chain end, simple structure, maintenance side is arranged on certain gap
Just, used cooperatively with automatic reclosing in systems, both lightning current can be in time grounded, again can to user's uninterrupted power supply, from
And play a part of to prevent insulator surface flashover, protection electrical equipment, maintain circuit normally to run；
Discharging gap is installed on ground insulator string, is got up through small―gap suture insulation against ground relative to by lightning conducter, only
Gap breakdown during thunderbolt, ground wire grounding, the added losses that electric current causes in lightning conducter when normally being run This reduces both circuit,
Lightning conducter can be used as connection again；
During gap discharge, electric arc is in electrode at a distance of most nearby forming, and the electric arc that erietiform gap top is constituted immediately is fast
Speed is elongated, and this electric arc is generally easy to extinguish, and can also be pulled up because of electric arc, and electrode is burnt all in goat's horn gap end, and gap
Will not then be burnt at distance minimum, so as to ensure correct operation next time；
An apiculus is installed additional in gap location, to increase gap electrical field unevenness.
Brief description of the drawings
The present invention is described in further detail with reference to the accompanying drawings and detailed description.
Fig. 1 is the structural representation of embodiment 1, and wherein a is suspension string gold utensil, and b is strain insulator-string gold utensil.
Fig. 2 is the structural representation of embodiment 2, and wherein a is suspension string gold utensil, and b is strain insulator-string gold utensil.
Fig. 3 is the structural representation of embodiment 3, and wherein a is suspension string gold utensil, and b is strain insulator-string gold utensil.
Wherein：1st, the first fastener, the 2, second fastener, the 3, first fixed plate, the 4, second fixed plate, 5, Top electrode, 6,
Bottom electrode, 7, ground insulator string, 8, recruit arc end, 9, arc end, the 10, the 3rd fastener, the 11, the 4th fastener, 12, tip.
Specific embodiment
In order to deepen the understanding of the present invention, it is described in further detail to of the invention below in conjunction with embodiment and accompanying drawing,
The embodiment is only used for the explanation present invention, does not constitute the restriction to protection scope of the present invention.
Embodiment 1
As shown in figure 1, a kind of discharging gap apparatus of the invention, the discharging gap apparatus are located on ground insulator string,
Discharging gap apparatus include the first fastener 1, the second fastener 2, the first fixed plate 3, the second fixed plate 4, Top electrode 5 and lower electricity
Pole 6, the head end of the first fixed plate 3 is fixed on the high-pressure side of ground insulator string 7, the end of the first fixed plate 3 by the first fastener 1
The head end of end connection Top electrode 5, to recruit arc end 8, the head end of the second fixed plate 4 is fixed by the second fastener 2 for the end of Top electrode 5
In the low-pressure end of ground insulator string 7, the end connection head end of bottom electrode 6 of the second fixed plate 4, the end arc end of bottom electrode 6
9, recruit arc end 8 to leave space with arc end 9, recruit arc end 8 to bend from lower to upper, arc end 9 bends from top to bottom, recruit arc end 8 by
Under the angle that bends from top to bottom of the angle that up bends and arc end 9 be 30-45 °, during gap discharge, electric arc is in electrode phase
Away from most nearby being formed, the electric arc that twin horn cleat shape gap top is constituted immediately is elongated rapidly, and this electric arc is generally easy to extinguish,
Can be because of electric arc pull-up, electrode is burnt all in goat's horn gap end, and will not then be burnt at clearance distance minimum, so that under ensureing
Correct operation.
It is effective lightning protection device, insulator chain end, simple structure, maintenance side is arranged on certain gap
Just, used cooperatively with automatic reclosing in systems, both lightning current can be in time grounded, again can to user's uninterrupted power supply, from
And play a part of to prevent insulator surface flashover, protection electrical equipment, maintain circuit normally to run；
Discharging gap is installed on ground insulator string, is got up through small―gap suture insulation against ground relative to by lightning conducter, only
Gap breakdown during thunderbolt, ground wire grounding, the added losses that electric current causes in lightning conducter when normally being run This reduces both circuit,
Lightning conducter can be used as connection again.
Embodiment 2
As shown in Fig. 2 a kind of discharging gap apparatus of the invention, the discharging gap apparatus are located on ground insulator string 7,
Discharging gap apparatus include the first fastener 1, the second fastener 2, the 3rd fastener 10, the 4th fastener 11, the first fixed plate
3rd, the second fixed plate 4, Top electrode 5 and bottom electrode 6, the head end of the first fixed plate 3 are fixed on ground insulator by the first fastener 1
The high-pressure side of string 7, by the 3rd fastener 10 and the head end perpendicular fastener of Top electrode 5, second fixes for the end of the first fixed plate 3
The head end of plate 4 is fixed on the low-pressure end of ground insulator string 7 by the second fastener 2, and the end of the second fixed plate 4 is tight by the 4th
Firmware 11 and the head end perpendicular fastener of bottom electrode 6, bottom electrode 6 tilt upward bending, the end of Top electrode 5 and bottom electrode by middle part
6 bending section leaves space, and the angle of inclination at the middle part of bottom electrode 6 is 130-140 °, the gap between Top electrode 5 and bottom electrode 6
Can be adjusted by the 3rd fastener 10 and the 4th fastener 11 respectively, during gap discharge, electric arc is in electrode at a distance of most nearby
Formed, the electric arc that single erietiform gap top is constituted immediately is elongated rapidly, and this electric arc is generally easy to extinguish, also can be because of electric arc
Pull-up, electrode is burnt all in goat's horn gap end, and will not then be burnt at clearance distance minimum, so as to ensure next time correct
Action.
It is effective lightning protection device, insulator chain end, simple structure, maintenance side is arranged on certain gap
Just, used cooperatively with automatic reclosing in systems, both lightning current can be in time grounded, again can to user's uninterrupted power supply, from
And play a part of to prevent insulator surface flashover, protection electrical equipment, maintain circuit normally to run；
Discharging gap is installed on ground insulator string, is got up through small―gap suture insulation against ground relative to by lightning conducter, only
Gap breakdown during thunderbolt, ground wire grounding, the added losses that electric current causes in lightning conducter when normally being run This reduces both circuit,
Lightning conducter can be used as connection again.
Embodiment 3
As shown in figure 3, a kind of discharging gap apparatus of the invention, the discharging gap apparatus are located on ground insulator string 7,
Discharging gap apparatus include the first fastener 1, the second fastener 2, the first fixed plate 3, the second fixed plate 4, Top electrode 5 and lower electricity
Pole 6, the head end of the first fixed plate 3 is fixed on the high-pressure side of ground insulator string 7, the end of the first fixed plate 3 by the first fastener 1
The head end of end connection Top electrode 5, the end of the first fixed plate 3 forms angle with the head end of Top electrode 5, and the head end of the second fixed plate 4 passes through
Second fastener 2 is fixed on the low-pressure end of ground insulator string 7, the end connection head end of bottom electrode 6 of the second fixed plate 4, second
The end of fixed plate 4 is vertical with the head end of bottom electrode 6, and bottom electrode 6 tilts upward bending by middle part, the first fixed plate 3 with it is upper
The junction of electrode 5 and the knee of bottom electrode 6 leave gap and install tip 12 in gap location, and Top electrode 5 is made up of band iron,
Bottom electrode 6 is made up of round steel, and shape is angled 45-135 °, in bottom electrode 6 between the end of the first fixed plate 1 and the head end of Top electrode 5
The angle of the oblique bending in portion is 130-140 °, an apiculus is installed additional in gap location, to increase gap electrical field unevenness.
It is effective lightning protection device, insulator chain end, simple structure, maintenance side is arranged on certain gap
Just, used cooperatively with automatic reclosing in systems, both lightning current can be in time grounded, again can to user's uninterrupted power supply, from
And play a part of to prevent insulator surface flashover, protection electrical equipment, maintain circuit normally to run；
Discharging gap is installed on ground insulator string, is got up through small―gap suture insulation against ground relative to by lightning conducter, only
Gap breakdown during thunderbolt, ground wire grounding, the added losses that electric current causes in lightning conducter when normally being run This reduces both circuit,
Lightning conducter can be used as connection again.
The electrical test requirement of discharging gap of the present invention：
According to the function and design requirement of discharging gap apparatus, following several electric type approval tests should be done.
（1）Lightning impulse voltage test or 50% all-wave impulse flashover voltage are tested
This experiment mainly determines dielectric strength of the discharging gap to lightning surge, to play the work of protection insulator
With its dielectric strength is necessarily less than the impulse flashover voltage of insulator chain, must not occur along all or part under test voltage
Insulator surface flashover.
By IEC standard requirement, lightning impulse simulation is carried out using 1.2/50 standard impulse waveform.Conventional probability is 50%
Impulse flashover voltage value is that its thunder and lightning does withstanding voltage, can be carried out with insertion or lifting and lowering method during experiment, its numerical value conversion to mark
6 ~ 7 times of circuit phase voltages as quasi- atmospheric condition is latter.
（2）Power frequency wet flash-over voltage is tested
By IEC standard requirement, what is imposed standard intraocular on gap and measure causes the voltage arithmetic average of power frequency flashover
Value, can also take the flashover voltage that probability is 50%.
The purpose is to the ability for examining gap that operating voltage and switching overvoltage are tolerated under circuit service condition.Its numerical value
General 4 ~ 4.5 times of circuit phase voltages.
（3）The wet withstanding voltage of power frequency
Operating experience shows that undergoing one minute electrical equipment of ac voltage withstanding experiment can typically ensure safe operation.
The predetermined test voltage of 75% design typically is taken in IEC standard, then with per second for the speed of test voltage 2% rises a voltage
Flashover for one minute or puncture in grade, maintenance, you can access there is no.But also can be initial point electricity by the 95% of power frequency wet flash-over voltage
Pressure is maintained one minute, 2% is declined if it still there is flashover general i.e. tolerable.
（4）Radio interference test
Discharging gap is installed on insulator chain, certainly will increase its radio interference.Insulated by Malaysian bidding documents 275kV
The requirement of substring is less than 46db.
（5）Initial corona voltage experiment
Corona test requirement on discharging gap is analogous to other with voltage class and with altitude hardware corona tests requirement.
The above, is only presently preferred embodiments of the present invention, is not the limit for making any other form to the present invention
System, and any modification for being made according to technical spirit of the invention or equivalent variations, still fall within model required for protection of the invention
Enclose.
Claims (1)
1. a kind of discharging gap apparatus, it is characterised in that：The discharging gap apparatus are located on ground insulator string, between the electric discharge
Gap device includes the first fastener, the second fastener, the first fixed plate, the second fixed plate, Top electrode and bottom electrode, described first
Fixed plate head end is fixed on the high-pressure side of ground insulator string, the end connection Top electrode of the first fixed plate by the first fastener
Head end, it is 45-135 ° that the first fixed plate end and Top electrode head end form angle, and the second fixed plate head end leads to
Cross the low-pressure end that the second fastener is fixed on ground insulator string, the end connection bottom electrode head end of the second fixed plate, described the
Two fixed plate ends are vertical with bottom electrode head end, and the bottom electrode tilts upward bending, the angle of oblique bending by middle part
It is 130-140 °, an apiculus is installed additional in gap location, to increase gap electrical field unevenness, in the first fixed plate and upper electricity
The junction of pole and the knee of bottom electrode leave gap and install tip in gap location, and the Top electrode is made up of band iron, under
Electrode is made up of round steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410257130.3A CN104008828B (en) | 2014-06-11 | 2014-06-11 | A kind of discharging gap apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410257130.3A CN104008828B (en) | 2014-06-11 | 2014-06-11 | A kind of discharging gap apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104008828A CN104008828A (en) | 2014-08-27 |
| CN104008828B true CN104008828B (en) | 2017-06-20 |
Family
ID=51369451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410257130.3A Active CN104008828B (en) | 2014-06-11 | 2014-06-11 | A kind of discharging gap apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104008828B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106054006B (en) * | 2016-08-08 | 2019-04-05 | 国网湖南省电力公司 | The low pressure starting the arc and the adjustable power frequency continued flow experimental rig of clearance distance and test method |
| CN108254661B (en) * | 2018-02-01 | 2021-04-16 | 南方电网科学研究院有限责任公司 | Hardware discharge voltage test system and method |
| CN110082652B (en) * | 2019-04-29 | 2021-09-03 | 电力规划总院有限公司 | Selection method and device for arcing horn and insulator string in overhead transmission line |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2687923Y (en) * | 2004-02-12 | 2005-03-23 | 中国电力科学研究院 | Overhead circuit parallel gap lightning protection device |
| CN2779573Y (en) * | 2005-01-13 | 2006-05-10 | 中国电力科学研究院 | Compound transformer neutral point protection gap |
| CN201075318Y (en) * | 2007-06-19 | 2008-06-18 | 北京交通大学 | Insulator string electrical arc discharge apparatus |
| CN201243186Y (en) * | 2007-11-30 | 2009-05-20 | 北京市电力公司 | Parallel connection clearance device for V-shaped insulator string of high-tension overhead line |
| CN203014162U (en) * | 2012-12-13 | 2013-06-19 | 河南电力器材公司 | 500-kilovolt overhead transmission line suspension-string parallel-gap anti-lighting protective device |
| CN204010854U (en) * | 2014-06-11 | 2014-12-10 | 国家电网公司 | A kind of discharging gap apparatus |
-
2014
- 2014-06-11 CN CN201410257130.3A patent/CN104008828B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2687923Y (en) * | 2004-02-12 | 2005-03-23 | 中国电力科学研究院 | Overhead circuit parallel gap lightning protection device |
| CN2779573Y (en) * | 2005-01-13 | 2006-05-10 | 中国电力科学研究院 | Compound transformer neutral point protection gap |
| CN201075318Y (en) * | 2007-06-19 | 2008-06-18 | 北京交通大学 | Insulator string electrical arc discharge apparatus |
| CN201243186Y (en) * | 2007-11-30 | 2009-05-20 | 北京市电力公司 | Parallel connection clearance device for V-shaped insulator string of high-tension overhead line |
| CN203014162U (en) * | 2012-12-13 | 2013-06-19 | 河南电力器材公司 | 500-kilovolt overhead transmission line suspension-string parallel-gap anti-lighting protective device |
| CN204010854U (en) * | 2014-06-11 | 2014-12-10 | 国家电网公司 | A kind of discharging gap apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104008828A (en) | 2014-08-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110445082B (en) | Single-phase installation structure of parallel gap of 10kV distribution line and test method thereof | |
| CN102486954B (en) | Multi-interspace self-expanding strong-airflow arc extinguishing lightning protection device | |
| CN101763922B (en) | Lightning-protection method and device for transmission line composite insulator | |
| CN201478816U (en) | Air blowing and variable gap arc extinguishing lightning protection gap device | |
| CN104008828B (en) | A kind of discharging gap apparatus | |
| CN104659776A (en) | Lightning counterattack protection device | |
| CN111293661B (en) | Bidirectional lightning protection disconnection protection method and device for insulated conductor | |
| CN209344514U (en) | The device of steel tower tower head overvoltage when a kind of inhibition transmission line lightning stroke | |
| CN202084898U (en) | Adjustable spherical electrode circuit protector | |
| CN207265416U (en) | A kind of 10kV exchanges overhead transmission line arc blowing type lightning protection device | |
| CN206210482U (en) | A kind of lightning protection line insulator with pressure and discharging gap function | |
| CN106298106B (en) | A kind of lightning protection line insulator with pressure and discharging gap function | |
| CN109586226A (en) | The method and device of steel tower tower head overvoltage when a kind of inhibition transmission line lightning stroke | |
| CN106448961B (en) | A kind of 10kV overvoltage protections insulator | |
| CN204010854U (en) | A kind of discharging gap apparatus | |
| CN204304426U (en) | Anti-counterattack thunder device | |
| CN202042294U (en) | Multi-gap self-expansion strong airflow arc extinction lightning-protection protecting device | |
| CN105529617A (en) | Line lightning arrester | |
| CN202678010U (en) | Novel lightning protection device | |
| CN105355342A (en) | Line lightning arrester | |
| CN206023160U (en) | Line flashover protector | |
| CN206313286U (en) | A kind of arrester | |
| CN2912043Y (en) | Lightning stroke protector for overhead insulated wire | |
| CN203859510U (en) | 35kV overhead line lightning stroke clamping protector | |
| CN210142546U (en) | DC grounding electrode circuit arcing angle with self-arc-extinguishing function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |