CN102290177A - 10kV multi-stage series gap lightning stroke flashover protector with arc striking electrode - Google Patents
10kV multi-stage series gap lightning stroke flashover protector with arc striking electrode Download PDFInfo
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- CN102290177A CN102290177A CN 201110211265 CN201110211265A CN102290177A CN 102290177 A CN102290177 A CN 102290177A CN 201110211265 CN201110211265 CN 201110211265 CN 201110211265 A CN201110211265 A CN 201110211265A CN 102290177 A CN102290177 A CN 102290177A
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- zinc oxide
- arc electrode
- oxide arrester
- gap
- lightning stroke
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- 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
Abstract
The invention discloses a 10kV multi-stage series gap lightning stroke flashover protector with an arc striking electrode. The multi-stage series gap lightning stroke flashover protector comprises the arc electrode striking, a zinc oxide lightning arrester, a support cross arm and a support adjusting plate, wherein the arc striking electrode is fixed at the high-voltage end of the zinc oxide lightning arrester; a first-stage discharging gap is formed between a high-voltage conducting wire and the zinc oxide lightning arrester; the high-voltage end of the zinc oxide lightning arrester is connected with the arc striking electrode, and the low-voltage end of the zinc oxide lightning arrester is fixed at one end of the support adjusting plate; the zinc oxide lightning arrester is provided with a second-stage discharging gap; one end of the support cross arm is fixed on an insulator steel leg, and the other end of the support cross arm is connected with one end of the support adjusting plate; and one end of the support adjusting plate is fixed at the low-voltage end of the zinc oxide lightning arrester, and the other end of the support adjusting plate is connected with the support cross arm. The unique multi-stage series pure air gap structure can ensure the effective action of the lightning stroke flashover protector, has high arc extinguishing capability, has the discharging residual voltage far lower than the flashover voltage of the insulator, does not withstand system voltage, and can prolong the service life of the lightning stroke flashover protector.
Description
Technical field
The present invention relates to lightning protection equipment, refer to a kind of 10kV band arc electrode plural serial stage gap lightning stroke flashover protector particularly.
Background technology
The lightning overvoltage amplitude height of 10kV overhead distribution, discharge time is short, and the insulation level of 10kV distribution line is low, lightning overvoltage can make insulator generation flashover, forms power frequency continued flow and blow lead on the lightning stroke flashover passage.Overhead distribution adopts insulated conductor, has solved corridor and safety problem that plain conductor cann't be solved, compares with cable, reduced investment, builds soon, and advantage is fairly obvious.But the lightning-caused breaking problem is more outstanding, and repeatedly insulated conductor lightning-caused breaking accident has appearred in the whole nation.According to on-the-spot ruuning situation, the 10kV plain conductor lightning-caused breaking accident or tripping rate with lightning strike have also occurred easily than higher, even the lightning-caused breaking accident also took place the 35kV plain conductor.The main cause that causes broken string is to build arc to form power frequency continued flow on the lightning stroke flashover passage, and the temperature of arc root is very high, can at short notice lead be blown, even plain conductor if the electric current that passes through is very big, also can blow lead.
The composite insulation cross arm that adopts, puncture property arc-preventing metal utensil, lightning protection pillar insulator and zinc oxide arrester etc. still according to the feedback of field practice, exist various problems at present, are difficult to form effective measures.For example, the making and the installation cost of composite insulation cross arm are bigger, the on-the-spot complexity of installing; Puncture property arc-preventing metal utensil can influence the power supply reliability and the quality of power supply, and tripping rate with lightning strike may cause the water inlet of insulated conductor core than higher behind the puncture insulating barrier, causes lead sag place electrochemical corrosion broken string; The mechanical strength of the insulator of lightning protection pillar insulator is lower, and is more much lower than pin insulator, the stress collection; The protection range of zinc oxide arrester is less, and road installing completely may cause the water inlet of insulated conductor core, causes sag place electrochemical corrosion broken string, bears power-frequency voltage for a long time, may cause that zinc oxide valve plate is aging, must carry out operation maintenance.
Summary of the invention
Purpose of the present invention just is to overcome the shortcoming and defect that existing lightning protection measures exists; a kind of 10kV band arc electrode plural serial stage gap lightning stroke flashover protector is provided; can when effectively preventing the lightning-caused breaking accident, reduce the tripping rate with lightning strike of circuit, improve the reliability of power supply.
For achieving the above object, 10kV band arc electrode plural serial stage provided by the invention gap lightning stroke flashover protector, comprise arc electrode, zinc oxide arrester, support cross-arm and support adjustable plate, described arc electrode is fixed in the high-pressure side of zinc oxide arrester, forms the first order discharging gap that the lightning stroke flashover passage is provided between high-voltage conducting wires and zinc oxide arrester;
The high pressure termination arc electrode of described zinc oxide arrester, low-pressure end is fixed in an end of described support adjustable plate, and described zinc oxide arrester is provided with the second level discharging gap that prevents lightning overvoltage and block power frequency continued flow;
One end of described support cross-arm is fixed on the electric insulator steel foot, and the other end is connected with support adjustable plate one end, is used to support zinc oxide arrester;
Described support adjustable plate one end is fixed on the low-pressure end of zinc oxide arrester, and the other end is connected with the support cross-arm, is used to regulate the mounting distance of arc electrode and high-voltage conducting wires.
Preferably, described arc electrode is made by aluminum alloy materials, and the cross section of arc electrode is cambered surface, and upper surface is to make the arc ignition face that forms first order discharging gap between lead and the zinc oxide arrester; The arc electrode bottom is the cylinder bodily form, and the top at cylinder center is provided with the fixing threaded hole that is connected with the high-pressure side screw rod of zinc oxide arrester, and the bottom at cylinder center is divided into the nut bore of the hold-down nut that covers the zinc oxide arrester high-pressure side.Like this, electrode design is circular-arc, even also can make the gap between lead and the arc electrode too big transformation can not take place under the situation of lead swing, guarantees the stability of discharge.
Preferably, the described first order discharging gap air gap that is 18～20mm.Like this, the lightning stroke flashover protector forms an air gap as first order discharging gap by arc electrode between lead.
Further, the center of described zinc oxide arrester is a zinc oxide valve plate, is connected with two ball discharges on the described zinc oxide valve plate, forms the second level discharging gap of 8～12mm between two ball discharges.Like this, the lightning stroke flashover protector passes through at two ball discharges of zinc oxide arrester intermediate fabrication, and the gap of two ball discharges is as second level discharging gap.
Further, described zinc oxide arrester adopts the zinc oxide arrester that prevents lightning overvoltage and block the band external series gap of power frequency continued flow of being used to of the regulation that meets DL/T815-2002 " transmission line of alternation current polymeric metal oxide surge arrester " and two standards of GB11032-2000 " interchange gapless metal-oxide lighting arrester ".
Preferably, an end of described support cross-arm is provided with a U-shaped steel pin screw that is fixed on electric insulator steel foot, and an adjusting slotted hole of regulating the height that supports adjustable plate is arranged in the middle of the other end side.
Preferably, described support adjustable plate one end side surface is provided with two fixing holes that are connected with the adjusting slotted hole that supports cross-arm, is used to regulate the mounting distance of arc electrode and high-voltage conducting wires; The other end of described support adjustable plate is provided with a low-pressure end fixing threaded hole of fixing with the low-pressure end screw rod of zinc oxide arrester.Like this, the low-pressure end of zinc oxide arrester does not need to increase extra earth resistance by supporting the adjustable plate natural grounding, reduces construction intensity and can effectively solve lead lightning-caused breaking problem simultaneously.
Preferably, described support cross-arm and support adjustable plate are made by the steel plate of thick 3mm, and the surface adopts hot galvanizing to handle.
Air gap among the present invention between the series gap of zinc oxide arrester and zinc oxide arrester and the lead makes the lightning stroke flashover protector can not be subjected to the influence of power-frequency voltage, switching overvoltage etc. at ordinary times, thereby has prolonged the useful life of lightning stroke flashover protector.Under the lightning overvoltage effect, two series gaps can guarantee lightning stroke flashover protector effective action, and the amplitude of restriction lightning overvoltage is also blocked power frequency continued flow, prevents the insulator arc-over accident.And, because zinc oxide arrester has an external series gap, can effectively absorb a part of lightning current, except guaranteeing lightning stroke flashover protector effective action, make the arc-rupturing capacity of lightning stroke flashover protector stronger.Being connected of adjustable plate the lightning stroke flashover protector is installed in parallel in the insulator side with supporting by supporting cross-arm; appropriate design supports cross-arm makes zinc oxide arrester and lead form suitable series gap; can form effective discharge channel by series gap, assurance lightning stroke flashover protector can escape switching overvoltage again can be at effective action under the lightning overvoltage.
Therefore; when the 10kV overhead distribution is subjected to being struck by lightning; the lightning stroke flashover protector can puncture discharging gap that arc electrode provides and the discharging gap in the zinc oxide arrester; make the action of lightning stroke flashover protector; lightning overvoltage is limited under the flashover voltage of insulator; by the lightning stroke flashover protector power frequency continued flow is blocked then, can prevent the conductor cord disconnection accident that causes by lightning stroke flashover.
Beneficial effect of the present invention is:
1, adopt unique pure air gap structure of plural serial stage, guarantee that the lightning stroke flashover protector can effective action, arc-rupturing capacity is strong, and the discharge residual voltage is much smaller than the flashover voltage of insulator;
2, zinc oxide arrester is not bear system voltage not having under the situation of lightning current, so just make zinc oxide valve plate not have do not have electric current to flow through under the situation of lightning current, thereby prolonged the operating time of zinc oxide valve plate, prolong lightning stroke flashover protector useful life, reduce daily operation maintenance, saved great amount of manpower and financial resources;
3,, guarantee that high-voltage insulating wire is injury-free because the existence in two gaps can not intake the insulated conductor core;
4, design is succinct, construction install convenience;
5, arc electrode can provide repeatedly the ablation of power frequency arc, dependable performance;
6, be applicable to the 10kV overhead distribution, comprise that insulated circuit and plain conductor circuit prevent insulated conductor lightning-caused breaking accident.
Description of drawings
Fig. 1 is the structural representation of lightning stroke flashover protector of the present invention.
Fig. 2 is the structural representation of arc electrode among Fig. 1.
Fig. 3 is the structural representation of zinc oxide arrester among Fig. 1.
Fig. 4 is the structural representation that supports cross-arm among Fig. 1.
Fig. 5 is the structural representation that supports adjustable plate among Fig. 1.
Among the figure: the 1-arc electrode, 1.1-draws arc ignition face, the 1.2-fixing threaded hole, 1.3-nut bore, 2-zinc oxide arrester, 2.1-high-pressure side screw rod, 2.2-hold-down nut, 2.3-clamp nut, 2.4-composite sheath, 2.5-zinc oxide valve plate, 2.6-low-pressure end screw rod, 2.7-ball discharge, 3-supports cross-arm, 3.1-steel pin screw, and 3.2-regulates slotted hole, 4-supports adjustable plate, 4.1-low-pressure end fixing threaded hole, 4.2-fixing hole.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples, and following examples are explanation of the invention and the present invention is not limited to following examples.
The 10kV band arc electrode plural serial stage gap lightning stroke flashover protector that the present invention is designed comprises arc electrode 1, zinc oxide arrester 2, supports cross-arm 3 and supports adjustable plate 4.Arc electrode 1 is fixed in the high-pressure side of zinc oxide arrester 2, forms the first order discharging gap that the lightning stroke flashover passage is provided between high-voltage conducting wires and zinc oxide arrester 2.First order discharging gap is the air gap of 18～20mm.Arc electrode 1 is made by aluminum alloy materials, and the cross section of arc electrode 1 is cambered surface, and upper surface is to make the arc ignition face 1.1 that forms first order discharging gap between lead and the zinc oxide arrester 2.Arc electrode 1 bottom is the cylinder bodily form, the top at cylinder center is provided with the fixing threaded hole 1.2 that is connected with the high-pressure side screw rod 2.1 of zinc oxide arrester 2, and the bottom at cylinder center is divided into the nut bore 1.3 of the hold-down nut 2.2 that covers zinc oxide arrester 2 high-pressure sides.The fixing threaded hole 1.2 of arc electrode 1 can make arc electrode 1 be fixed on the high-pressure side screw rod 2.1 of zinc oxide arrester 2, and tightening back nut hole 1.3 can cover hold-down nut 2.2, simultaneously arc electrode 1 is installed firmly.When installing on the line, lead is placed on 1 the arc ignition face 1.1 of arc electrode, form the discharging gap between lead and the zinc oxide arrester 2.
The high pressure termination arc electrode 1 of zinc oxide arrester 2, low-pressure end are fixed in an end that supports adjustable plate 4, and zinc oxide arrester 2 is provided with the second level discharging gap that prevents lightning overvoltage and block power frequency continued flow.The center of zinc oxide arrester 2 is a zinc oxide valve plate 2.5, is connected with the second level discharging gap that forms 8～12mm between 2.7, two ball discharges 2.7 of two ball discharges on the zinc oxide valve plate 2.5, can limit lightning overvoltage and block power frequency continued flow.Composite sheath 2.4 is enclosed within zinc oxide valve plate 2.5, and provide the external insulation of zinc oxide arrester 2, guarantee enough dielectric strengths, the low-pressure end screw rod 2.6 of zinc oxide arrester 2 is installed in the low-pressure end fixing threaded hole 4.1 that supports adjustable plate 4, tighten clamp nut 2.3, so zinc oxide arrester 2 is connected in parallel on insulation sides, plays the effect that prevents lightning-caused breaking.Zinc oxide arrester 2 adopts the zinc oxide arrester that prevents lightning overvoltage and block the band external series gap of power frequency continued flow of being used to of the regulation that meets DL/T815-2002 " transmission line of alternation current polymeric metal oxide surge arrester " and two standards of GB11032-2000 " interchange gapless metal-oxide lighting arrester ".
An end that supports cross-arm 3 is fixed on the electric insulator steel foot, and the other end is connected with support adjustable plate 4 one ends, is used to support zinc oxide arrester 2.An end that supports cross-arm 3 is provided with a U-shaped steel pin screw 3.1 that is fixed on electric insulator steel foot, and an adjusting slotted hole 3.2 of regulating the height that supports adjustable plate 4 is arranged in the middle of the other end side.
Support the low-pressure end that adjustable plate 4 one ends are fixed on zinc oxide arrester 2, the other end is connected with support cross-arm 3, is used to regulate the mounting distance of arc electrode 1 and high-voltage conducting wires.Support adjustable plate 4 one end side surface and be provided with two fixing holes 4.2 that are connected with the adjusting slotted hole 3.2 that supports cross-arm 3, be used to regulate the mounting distance of arc electrode 1 and high-voltage conducting wires; The other end that supports adjustable plate 4 is provided with a low-pressure end fixing threaded hole 4.1 of fixing with the low-pressure end screw rod 2.6 of zinc oxide arrester 2.
Support cross-arm 3 and made by the steel plate of thick 3mm with support adjustable plate 4, the surface adopts hot galvanizing to handle.Supporting the adjusting slotted hole 3.2 of cross-arm 3 fixes with two fixing holes, the 4.2 usefulness screw rods that support adjustable plate 4, the one, the distance that can regulate arc electrode 1 and lead, the 2nd, make the steel pin natural grounding of zinc oxide arrester 2 by line insulator, make lightning current form a discharge channel.
Operation principle of the present invention is:
The size of the fixing threaded hole 1.2 of arc electrode 1 cooperates with the size of the high-pressure side screw rod 2.1 of zinc oxide arrester 2, and arc electrode 1 is fixed on the high-pressure side screw rod 2.1, can firmly arc electrode 1 be fixed on the zinc oxide arrester 2 after tightening.Arc ignition face 1.1 makes and forms a discharging gap between lead and the zinc oxide arrester 2, the low-pressure end screw rod 2.6 of zinc oxide arrester 2 is fixed on the low-pressure end fixing threaded hole 4.1 that supports adjustable plate 4, two screw rods of two fixing holes, 4.2 usefulness that support adjustable plate 4 are fixed on the adjusting slotted hole 3.2 that supports cross-arm, the steel pin screw 3.1 that supports cross-arm 3 is fixed on the steel pin place of insulator, and zinc oxide arrester 2 is connected in parallel on the insulator side.When electrical network normally moves, because arc electrode 1 forms first order discharging gap between lead and zinc oxide arrester 2, and zinc oxide arrester 2 designs itself a second level discharging gap, form two gaps of connecting with the air gap of high-pressure side, just can isolate power-frequency voltage, make zinc oxide arrester 2 bear voltage hardly.Two series gaps simultaneously reasonable in design make zinc oxide arrester 2 can be failure to actuate in switching overvoltage, prolong the useful life of zinc oxide arrester 2; Under the lightning overvoltage effect of direct lightning strike or the generation of induction thunder, two air gaps are simultaneously breakdown, and zinc oxide arrester 2 presents Low ESR, and lightning current is released into ground; After the lightning impulse, power-frequency voltage loads on the zinc oxide arrester 2, the resistance moment change of zinc oxide arrester 2 is big, the electric current that passes through is that arc current is suppressed in low numerical value, increase falls in the air gap arc voltage, the insulation of air gap recovers rapidly, and electric arc extinguishes in the short time naturally at the utmost point, and power frequency continued flow is interdicted fully.
Claims (8)
1. a 10kV is with arc electrode plural serial stage gap lightning stroke flashover protector, comprise arc electrode (1), zinc oxide arrester (2), support cross-arm (3) and support adjustable plate (4), it is characterized in that: described arc electrode (1) is fixed in the high-pressure side of zinc oxide arrester (2), forms the first order discharging gap that the lightning stroke flashover passage is provided between high-voltage conducting wires and zinc oxide arrester (2);
The high pressure termination arc electrode (1) of described zinc oxide arrester (2), low-pressure end is fixed in an end of described support adjustable plate (4), and described zinc oxide arrester (2) is provided with the second level discharging gap that prevents lightning overvoltage and block power frequency continued flow;
One end of described support cross-arm (3) is fixed on the electric insulator steel foot, and the other end is connected with support adjustable plate (4) one ends, is used to support zinc oxide arrester (2);
Described support adjustable plate (4) one ends are fixed on the low-pressure end of zinc oxide arrester (2), and the other end is connected with support cross-arm (3), is used to regulate the mounting distance of arc electrode (1) and high-voltage conducting wires.
2. 10kV band arc electrode plural serial stage according to claim 1 gap lightning stroke flashover protector, it is characterized in that: described arc electrode (1) is made by aluminum alloy materials, the cross section of arc electrode (1) is cambered surface, and upper surface is for making the arc ignition face (1.1) that forms first order discharging gap between lead and the zinc oxide arrester (2); Arc electrode (1) bottom is the cylinder bodily form, the top at cylinder center is provided with the fixing threaded hole (1.2) that is connected with the high-pressure side screw rod (2.1) of zinc oxide arrester (2), and the bottom at cylinder center is divided into the nut bore (1.3) of the hold-down nut (2.2) that covers zinc oxide arrester (2) high-pressure side.
3. 10kV band arc electrode plural serial stage according to claim 1 and 2 gap lightning stroke flashover protector, it is characterized in that: described first order discharging gap is the air gap of 18～20mm.
4. many external series gaps of 10kV band arc electrode according to claim 1 lightning stroke flashover protector; it is characterized in that: the center of described zinc oxide arrester (2) is zinc oxide valve plate (2.5); be connected with two ball discharges (2.7) on the described zinc oxide valve plate (2.5), form the second level discharging gap of 8～12mm between two ball discharges (2.7).
5. according to claim 1 or 4 described 10kV band arc electrode plural serial stage gap lightning stroke flashover protectors, it is characterized in that: described zinc oxide arrester (2) adopts the zinc oxide arrester that prevents lightning overvoltage and block the band external series gap of power frequency continued flow of being used to of the regulation that meets DL/T815-2002 " transmission line of alternation current polymeric metal oxide surge arrester " and two standards of GB11032-2000 " interchange gapless metal-oxide lighting arrester ".
6. 10kV band arc electrode plural serial stage according to claim 1 gap lightning stroke flashover protector; it is characterized in that: an end of described support cross-arm (3) is provided with a U-shaped steel pin screw (3.1) that is fixed on electric insulator steel foot, and an adjusting slotted hole (3.2) of regulating the height that supports adjustable plate (4) is arranged in the middle of the other end side.
7. 10kV band arc electrode plural serial stage according to claim 1 gap lightning stroke flashover protector, it is characterized in that: described support adjustable plate (4) one end side surface are provided with two fixing holes (4.2) that are connected with the adjusting slotted hole (3.2) that supports cross-arm (3), are used to regulate the mounting distance of arc electrode (1) and high-voltage conducting wires; The other end of described support adjustable plate (4) is provided with a low-pressure end fixing threaded hole (4.1) of fixing with the low-pressure end screw rod (2.6) of zinc oxide arrester (2).
8. according to claim 6 or 7 described 10kV band arc electrode plural serial stage gap lightning stroke flashover protectors, it is characterized in that: described support cross-arm (3) and support adjustable plate (4) are made by the steel plate of thick 3mm, and the surface adopts hot galvanizing to handle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110211265 CN102290177B (en) | 2011-07-27 | 2011-07-27 | 10kV multi-stage series gap lightning stroke flashover protector with arc striking electrode |
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| CN 201110211265 CN102290177B (en) | 2011-07-27 | 2011-07-27 | 10kV multi-stage series gap lightning stroke flashover protector with arc striking electrode |
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| CN102290177B CN102290177B (en) | 2012-12-19 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103441461A (en) * | 2013-08-04 | 2013-12-11 | 国家电网公司 | Porcelain bottle fixing method |
| CN103490368A (en) * | 2013-10-08 | 2014-01-01 | 昆山振宏电子机械有限公司 | Arrester support |
| CN105514802A (en) * | 2016-01-27 | 2016-04-20 | 武汉水院电气有限责任公司 | Two-stage series gap lightning flashover protector capable of being replaced in electrified mode |
| CN110824303A (en) * | 2019-10-16 | 2020-02-21 | 广西大学 | Method for eliminating central direct flashover of span by utilizing advanced discharge |
| CN111293588A (en) * | 2018-12-07 | 2020-06-16 | 国网内蒙古东部电力有限公司经济技术研究院 | Multistage series gap lightning flashover protector |
| CN114141549A (en) * | 2021-11-26 | 2022-03-04 | 广东电网有限责任公司 | High-voltage discharge device |
| CN114597849A (en) * | 2022-03-24 | 2022-06-07 | 广东电网有限责任公司 | Join in marriage net twine way lightning protection device |
| CN116612953A (en) * | 2023-06-01 | 2023-08-18 | 浙江东禾工程设计有限公司 | Lightning arrester capable of being adjusted in multiple stages |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103441461A (en) * | 2013-08-04 | 2013-12-11 | 国家电网公司 | Porcelain bottle fixing method |
| CN103441461B (en) * | 2013-08-04 | 2016-12-07 | 国家电网公司 | A kind of porcelain vase fixing means |
| CN103490368A (en) * | 2013-10-08 | 2014-01-01 | 昆山振宏电子机械有限公司 | Arrester support |
| CN105514802A (en) * | 2016-01-27 | 2016-04-20 | 武汉水院电气有限责任公司 | Two-stage series gap lightning flashover protector capable of being replaced in electrified mode |
| CN111293588A (en) * | 2018-12-07 | 2020-06-16 | 国网内蒙古东部电力有限公司经济技术研究院 | Multistage series gap lightning flashover protector |
| CN111293588B (en) * | 2018-12-07 | 2021-08-24 | 国网内蒙古东部电力有限公司经济技术研究院 | Multistage series gap lightning flashover protector |
| CN110824303A (en) * | 2019-10-16 | 2020-02-21 | 广西大学 | Method for eliminating central direct flashover of span by utilizing advanced discharge |
| CN114141549A (en) * | 2021-11-26 | 2022-03-04 | 广东电网有限责任公司 | High-voltage discharge device |
| CN114141549B (en) * | 2021-11-26 | 2024-02-27 | 广东电网有限责任公司 | High-voltage discharge device |
| CN114597849A (en) * | 2022-03-24 | 2022-06-07 | 广东电网有限责任公司 | Join in marriage net twine way lightning protection device |
| CN116612953A (en) * | 2023-06-01 | 2023-08-18 | 浙江东禾工程设计有限公司 | Lightning arrester capable of being adjusted in multiple stages |
| CN116612953B (en) * | 2023-06-01 | 2024-04-02 | 浙江东禾工程设计有限公司 | Lightning arrester capable of being adjusted in multiple stages |
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