CN110648808A - Single-phase grounding-proof lightning puncture-proof insulator for overhead line - Google Patents
Single-phase grounding-proof lightning puncture-proof insulator for overhead line Download PDFInfo
- Publication number
- CN110648808A CN110648808A CN201910842837.3A CN201910842837A CN110648808A CN 110648808 A CN110648808 A CN 110648808A CN 201910842837 A CN201910842837 A CN 201910842837A CN 110648808 A CN110648808 A CN 110648808A
- Authority
- CN
- China
- Prior art keywords
- conductive
- normally closed
- zinc oxide
- insulator
- closed switch
- 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
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/42—Means for obtaining improved distribution of voltage; Protection against arc discharges
-
- 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
- H01B17/005—Insulators structurally associated with built-in electrical equipment
-
- 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
- H01B17/42—Means for obtaining improved distribution of voltage; Protection against arc discharges
- H01B17/46—Means for providing an external arc-discharge path
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulators (AREA)
Abstract
The invention discloses a single-phase grounding prevention type lightning protection puncture insulator for an overhead line, and aims to provide the single-phase grounding prevention type lightning protection puncture insulator for the overhead line, which can not only protect equipment to realize a lightning protection function, but also effectively avoid the problem of single-phase grounding faults. It includes a conductive mounting bracket; the lightning protection insulator comprises a conductive base and a conductive top seat, and a conductive drainage rod is arranged on the conductive top seat; the current limiting element comprises a zinc oxide arrester and a conductive current guiding ring, the zinc oxide arrester is installed on the conductive installation support through an insulating support, the conductive current guiding ring is installed at the first end of the zinc oxide arrester, and a discharge gap is formed by a gap between the conductive current guiding ring and the conductive current guiding rod; and the single-phase grounding prevention element comprises a normally closed switch and a controller, and the lower end of the zinc oxide arrester, the normally closed switch and the conductive mounting bracket are connected in series.
Description
Technical Field
The invention relates to a lightning protection puncture insulator, in particular to a single-phase grounding prevention lightning protection puncture insulator for an overhead line.
Background
In recent years, the use of insulated conductors has led to a reduction in the lightning resistance of the lines. In order to solve the problem, a lightning protection pin insulator with a lightning arrester and without stripping an insulating layer is invented and widely applied, and has double functions of the pin insulator and the lightning arrester. The current lightning protection pin insulator generally comprises a conductive base arranged at the lower end of the insulator, and a drainage rod 1.5 arranged at the upper end of the insulator and electrically connected with the conductive upper seat, wherein one end of the drainage rod is electrically connected with the conductive upper seat, a discharge gap is formed between the other end of the drainage rod and the conductive base, when an insulated wire is struck by lightning, the discharge gap between the drainage rod and the conductive base is punctured to form a current channel, lightning current is released to the ground, and the lightning protection function of the protection device is realized. For example, chinese patent publication No. CN202230809U, published 2012 and 5-23, entitled multifunctional lightning protection pin insulator.
The existing lightning protection pin insulator can prevent single-phase earth faults under the common condition due to the isolation effect of the discharge gap; however, in special cases, such as wet weather and rainy or snowy weather, a problem of single-phase ground fault occurs because the gap of the discharge gap is generally small.
Disclosure of Invention
The invention aims to provide a single-phase grounding prevention type lightning protection puncture insulator for an overhead line, which can not only protect equipment to realize a lightning protection function, but also effectively avoid the problem of single-phase grounding fault.
The technical scheme of the invention is as follows:
a single-phase grounding prevention type lightning puncture insulator for an overhead line comprises a conductive mounting bracket; the lightning protection insulator comprises a conductive base and a conductive top seat, the conductive base is arranged on the conductive mounting bracket, and a conductive drainage rod is arranged on the conductive top seat; the current limiting element comprises a zinc oxide arrester and a conductive current guiding ring, the zinc oxide arrester is installed on the conductive installation support through an insulating support, the conductive current guiding ring is installed at the first end of the zinc oxide arrester, the conductive current guiding ring is electrically connected with the first end of the zinc oxide arrester, and a discharge gap is formed by a gap between the conductive current guiding ring and the conductive current guiding rod; and the single-phase grounding prevention element comprises a normally closed switch and a controller, the lower end of the zinc oxide arrester, the normally closed switch and the conductive mounting bracket are connected in series, the controller is used for detecting the power frequency current flowing through the normally closed switch and controlling the normally closed switch to be on/off, and when the controller detects that the power frequency current flowing through the normally closed switch is greater than a set value, the normally closed switch is controlled to be off.
When lightning overvoltage occurs, a discharge gap between the conductive drainage rod and the conductive drainage ring is broken down to form a current channel, and the lightning current is released to the ground through the zinc oxide lightning arrester, the normally closed switch and the conductive mounting bracket; and then after the lightning current is released to the ground, if continuous power frequency current is guided to the conductive current guiding ring through a gap channel formed by the lightning current, the power frequency current is absorbed by the zinc oxide arrester, so that the effect of protecting the circuit is achieved, the circuit is prevented from breaking or tripping accidents caused by lightning stroke, and the running reliability of the circuit is improved. On the other hand, in some special conditions, such as wet weather and rainy and snowy weather, if a power frequency current is guided to the conductive current guiding ring through the discharge gap, the power frequency current will be absorbed by the zinc oxide arrester, so as to avoid the problem of single-phase ground fault.
More importantly, if the zinc oxide arrester fails, when power frequency current flows through the normally closed switch through the zinc oxide arrester, if the power frequency current flowing through the normally closed switch is larger than a set value, the normally closed switch is controlled to be switched off, and therefore single-phase grounding faults cannot occur.
Preferably, the single-phase grounding prevention element further comprises an insulating shell, a closed inner cavity is formed in the insulating shell, and the normally closed switch and the controller are arranged in the closed inner cavity of the insulating shell. So, can avoid under moist weather and the sleet weather, rainwater and moisture get into insulating casing's airtight inner chamber, after the disconnection of control normally closed switch, can guarantee the circuit disconnection to ensure can not take place single-phase grounded's trouble.
Preferably, the insulating housing is mounted on the lower end of the zinc oxide arrester or on the insulating support.
Preferably, the normally closed switch comprises a fixed contact, a moving contact electrically connected with the fixed contact, and a driving execution device for driving the moving contact to be separated from the fixed contact.
Preferably, the conductive drainage rod is horizontally arranged, and the conductive drainage ring is positioned below the conductive drainage rod.
Preferably, the single-phase grounding prevention element further comprises a fault indicator lamp, and the fault indicator lamp is turned on when the controller detects that the power frequency current flowing through the normally closed switch is larger than a set value. As the single-phase grounding prevention type lightning protection puncture insulator for the overhead line is generally arranged at the top of a tower and is far away from the ground, once a fault occurs, the insulator is difficult to see by naked eyes and a fault point is difficult to find; therefore, this scheme setting is at the fault indicator lamp, and when the controller detected the power frequency electric current that flows through normally closed switch and is greater than the setting value, the fault indicator lamp was lighted to make things convenient for the line patrol workman in time to discover and handle the fault point.
Preferably, the electrically conductive shunt ring is mounted to the first end of the zinc oxide arrester by means of a bolt.
Preferably, the insulating support is mounted on the conductive mounting support by bolts.
The invention has the beneficial effects that: when lightning overvoltage occurs, a discharge gap between the conductive drainage rod and the conductive drainage ring is broken down to form a current channel, and the lightning current is released to the ground through the zinc oxide lightning arrester, the normally closed switch and the conductive mounting bracket; and then after the lightning current is released to the ground, if continuous power frequency current is guided to the conductive current guiding ring through a gap channel formed by the lightning current, the power frequency current is absorbed by the zinc oxide arrester, so that the effect of protecting the circuit is achieved, the circuit is prevented from breaking or tripping accidents caused by lightning stroke, and the running reliability of the circuit is improved. On the other hand, in some special conditions, such as wet weather and rainy and snowy weather, if a power frequency current is guided to the conductive current guiding ring through the discharge gap, the power frequency current will be absorbed by the zinc oxide arrester, so as to avoid the problem of single-phase ground fault. More importantly, if the zinc oxide arrester fails, when power frequency current flows through the normally closed switch through the zinc oxide arrester, if the power frequency current flowing through the normally closed switch is larger than a set value, the normally closed switch is controlled to be switched off, and therefore single-phase grounding faults cannot occur.
Drawings
Fig. 1 is a schematic structural view of a single-phase grounding-proof lightning penetration insulator for an overhead line according to the present invention.
Fig. 2 is a schematic structural diagram of the single-phase grounding prevention element of the present invention.
In the figure:
a conductive mounting bracket 1;
the lightning protection insulator 2, the insulator main body 2.1, the conductive base 2.2, the conductive top seat 2.3, the conductive drainage rod 2.4 and the piercing wire clamp 2.5;
a current limiting element 3 and a zinc oxide arrester 3.1. A conductive current guiding ring 3.2;
a discharge gap 4;
an insulating support 5;
the device comprises a single-phase grounding prevention element 6, a controller 6.1, a normally closed switch 6.2, a fixed contact 6.21, a moving contact 6.22, a driving execution device 6.23, an insulating shell 6.3 and a conducting strip 6.4;
the wires 7 are connected.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention are clearly explained and illustrated below with reference to the accompanying drawings, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present scheme, and are not construed as limiting the scheme of the present invention.
These and other aspects of embodiments of the invention will be apparent with reference to the following description and attached drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the ways in which the principles of the embodiments of the invention may be practiced, but it is understood that the scope of the embodiments of the invention is not limited thereby. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., and "several" means one or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections, either mechanical or electrical, or communicating with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The first embodiment is as follows: as shown in fig. 1 and 2, the single-phase grounding prevention lightning penetration insulator for the overhead line includes a conductive mounting bracket 1, a lightning protection insulator 2, a current limiting element 3, and a single-phase grounding prevention element 6.
The lightning protection insulator 2 comprises an insulator main body 2.1, a conductive base 2.2 and a conductive top seat 2.3, wherein the conductive base is arranged at the bottom of the insulator main body, and the conductive top seat is arranged at the top of the insulator main body. The conductive base is installed on the conductive installation support. The conductive footstock is provided with a conductive drainage rod 2.4.
The current limiting element 3 comprises a zinc oxide arrester 3.1 and an electrically conductive shunt ring 3.2. The zinc oxide arrester is installed on the conductive installation support through the insulating support 5. The conductive current guiding ring is arranged at the first end of the zinc oxide arrester, and the conductive current guiding ring is electrically connected with the first end of the zinc oxide arrester. The gap between the conductive current guiding ring and the conductive current guiding rod forms a discharge gap 4. In this embodiment, electrically conductive drainage stick horizontal setting, electrically conductive drainage ring is located the below of electrically conductive drainage stick.
As shown in fig. 1 and fig. 2, the single-phase grounding prevention element includes a normally closed switch 6.2 and a controller 6.1. The lower end of the zinc oxide arrester, the normally closed switch and the conductive mounting bracket are connected in series. The controller is used for detecting the power frequency current flowing through the normally closed switch and controlling the on/off of the normally closed switch, and when the controller detects that the power frequency current flowing through the normally closed switch is larger than a set value, the normally closed switch is controlled to be switched off.
When lightning overvoltage occurs, a discharge gap between the conductive drainage rod and the conductive drainage ring is broken down to form a current channel, and the lightning current is released to the ground through the zinc oxide lightning arrester, the normally closed switch and the conductive mounting bracket; and then after the lightning current is released to the ground, if continuous power frequency current is guided to the conductive current guiding ring through a gap channel formed by the lightning current, the power frequency current is absorbed by the zinc oxide arrester, so that the effect of protecting the circuit is achieved, the circuit is prevented from breaking or tripping accidents caused by lightning stroke, and the running reliability of the circuit is improved. On the other hand, in some special conditions, such as wet weather and rainy and snowy weather, if a power frequency current is guided to the conductive current guiding ring through the discharge gap, the power frequency current will be absorbed by the zinc oxide arrester, so as to avoid the problem of single-phase ground fault. More importantly, if the zinc oxide arrester fails, when power frequency current flows through the normally closed switch through the zinc oxide arrester, if the power frequency current flowing through the normally closed switch is larger than a set value, the normally closed switch is controlled to be switched off, and therefore single-phase grounding faults cannot occur.
Specifically, as shown in fig. 1 and 2, a piercing clip 2.5 is mounted on the top of the conductive header and is used to pierce the insulation of the insulated conductor to make an electrical connection. The conductive mounting bracket is arranged on the top of the tower.
Further, as shown in fig. 2, the single-phase grounding prevention element 6 further includes an insulating housing 6.3, a closed cavity is provided in the insulating housing, and the normally closed switch and the controller are disposed in the closed cavity of the insulating housing. So, can avoid under moist weather and the sleet weather, rainwater and moisture get into insulating casing's airtight inner chamber, after the disconnection of control normally closed switch, can guarantee the circuit disconnection to ensure can not take place single-phase grounded's trouble.
The insulating shell is arranged at the lower end of the zinc oxide arrester or on the insulating bracket.
Further, as shown in fig. 2, the normally closed switch includes a fixed contact 6.21, a movable contact 6.22 electrically connected to the fixed contact, and a driving actuator 6.23 for driving the movable contact to be separated from the fixed contact. In the embodiment, the normally closed switch comprises an insulating support, a fixed contact is fixed on the insulating support, a moving contact is rotatably arranged on the insulating support and is electrically connected with the fixed contact, and a driving execution device is an electromagnet; when the controller detects that the power frequency current flowing through the normally closed switch is larger than a set value, the controller controls the electromagnet to be electrified, the movable iron core of the electromagnet moves, and the moving contact is pushed open, so that the moving contact is separated from the fixed contact.
In one embodiment of the invention, the lower end of the zinc oxide arrester is electrically connected with a fixed contact, and the moving contact is connected with a conductive mounting bracket through a connecting wire 7, specifically, the outer surface of an insulating shell is provided with two conductive sheets 6.4, the two conductive sheets are positioned at two opposite sides of the insulating shell, one conductive sheet is electrically connected with the fixed contact, and the other conductive sheet is electrically connected with the moving contact; the lower end of the zinc oxide arrester is electrically connected with one conducting strip, and the other conducting strip is connected with the conductive mounting bracket through a connecting wire.
Further, the single-phase grounding prevention element further comprises a fault indicator lamp, and when the controller detects that the power frequency current flowing through the normally closed switch is larger than a set value, the fault indicator lamp is turned on. As the single-phase grounding prevention type lightning protection puncture insulator for the overhead line is generally arranged at the top of a tower and is far away from the ground, once a fault occurs, the insulator is difficult to see by naked eyes and a fault point is difficult to find; therefore, this scheme setting is at the fault indicator lamp, and when the controller detected the power frequency electric current that flows through normally closed switch and is greater than the setting value, the fault indicator lamp was lighted to make things convenient for the line patrol workman in time to discover and handle the fault point.
Further, the conductive current guiding ring is installed at the first end of the zinc oxide arrester through a bolt. The insulating support is installed on the conductive installation support through a bolt.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (8)
1. A single-phase grounding-proof lightning puncture insulator for an overhead line is characterized by comprising,
a conductive mounting bracket;
the lightning protection insulator comprises a conductive base and a conductive top seat, the conductive base is arranged on the conductive mounting bracket, and a conductive drainage rod is arranged on the conductive top seat;
the current limiting element comprises a zinc oxide arrester and a conductive current guiding ring, the zinc oxide arrester is installed on the conductive installation support through an insulating support, the conductive current guiding ring is installed at the first end of the zinc oxide arrester, the conductive current guiding ring is electrically connected with the first end of the zinc oxide arrester, and a discharge gap is formed by a gap between the conductive current guiding ring and the conductive current guiding rod; and
prevent single-phase ground component, prevent single-phase ground component and include normally closed switch and controller, the lower extreme of zinc oxide arrester, normally closed switch and electrically conductive installing support series connection, the controller is used for detecting the power frequency current that flows through normally closed switch and is used for controlling normally closed switch on/off, when the controller detects that the power frequency current that flows through normally closed switch is greater than the setting value, then control normally closed switch disconnection.
2. The lightning protection single-phase grounding penetration insulator for overhead line of claim 1, wherein the single-phase grounding protection element further comprises an insulating housing having a closed cavity therein, the normally closed switch and the controller being disposed within the closed cavity of the insulating housing.
3. The single-phase ground-proof lightning penetration insulator for an overhead line according to claim 2, wherein the insulating housing is mounted on a lower end of the zinc oxide lightning arrester or an insulating holder.
4. The anti-single-phase grounding lightning protection puncture insulator for the overhead line according to claim 1, 2 or 3, wherein the normally closed switch comprises a fixed contact, a movable contact electrically connected with the fixed contact, and a driving execution device for driving the movable contact to be separated from the fixed contact.
5. The single-phase grounding-proof lightning penetration insulator for the overhead line according to claim 1, 2 or 3, wherein the conductive drainage rod is horizontally arranged, and the conductive drainage ring is positioned below the conductive drainage rod.
6. The lightning protection single-phase grounding-proof penetration insulator for the overhead line according to claim 1, 2 or 3, wherein the single-phase grounding-proof element further comprises a fault indicator lamp, and the fault indicator lamp is turned on when the controller detects that the power frequency current flowing through the normally closed switch is larger than a set value.
7. The lightning protection penetrating insulator of single-phase grounding type for overhead line according to claim 1, 2 or 3, wherein said conductive current guiding ring is mounted on the first end of the zinc oxide lightning arrester by means of a bolt.
8. The lightning protection single-phase grounding penetration insulator for overhead line according to claim 1, 2 or 3, wherein said insulating support is mounted on said conductive mounting support by means of bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910842837.3A CN110648808A (en) | 2019-09-06 | 2019-09-06 | Single-phase grounding-proof lightning puncture-proof insulator for overhead line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910842837.3A CN110648808A (en) | 2019-09-06 | 2019-09-06 | Single-phase grounding-proof lightning puncture-proof insulator for overhead line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110648808A true CN110648808A (en) | 2020-01-03 |
Family
ID=68991678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910842837.3A Pending CN110648808A (en) | 2019-09-06 | 2019-09-06 | Single-phase grounding-proof lightning puncture-proof insulator for overhead line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110648808A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024087991A1 (en) * | 2022-10-25 | 2024-05-02 | 云南电网有限责任公司曲靖供电局 | Lightning-protected and anti-unidirectional composite post insulator for power transmission line |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201692231U (en) * | 2010-06-18 | 2011-01-05 | 栾春艳 | Desk used in digestive system department of hospital |
| CN103779830A (en) * | 2012-10-24 | 2014-05-07 | 孙巍巍 | Novel surge protection device |
| CN204103249U (en) * | 2014-07-15 | 2015-01-14 | 朱帅 | A kind of external series gap lightning arrester and mounting structure thereof |
| CN106067673A (en) * | 2014-11-10 | 2016-11-02 | 孙麓轩 | A kind of Novel electric surge protector |
| CN109473243A (en) * | 2018-08-16 | 2019-03-15 | 国网浙江省电力有限公司金华供电公司 | A kind of annular dropout type tape jam indicator type Zinc-Oxide Arrester |
| CN208834829U (en) * | 2018-09-18 | 2019-05-07 | 广东电网有限责任公司 | A kind of porcelain pole arm type arrester with series gaps |
-
2019
- 2019-09-06 CN CN201910842837.3A patent/CN110648808A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201692231U (en) * | 2010-06-18 | 2011-01-05 | 栾春艳 | Desk used in digestive system department of hospital |
| CN103779830A (en) * | 2012-10-24 | 2014-05-07 | 孙巍巍 | Novel surge protection device |
| CN204103249U (en) * | 2014-07-15 | 2015-01-14 | 朱帅 | A kind of external series gap lightning arrester and mounting structure thereof |
| CN106067673A (en) * | 2014-11-10 | 2016-11-02 | 孙麓轩 | A kind of Novel electric surge protector |
| CN109473243A (en) * | 2018-08-16 | 2019-03-15 | 国网浙江省电力有限公司金华供电公司 | A kind of annular dropout type tape jam indicator type Zinc-Oxide Arrester |
| CN208834829U (en) * | 2018-09-18 | 2019-05-07 | 广东电网有限责任公司 | A kind of porcelain pole arm type arrester with series gaps |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024087991A1 (en) * | 2022-10-25 | 2024-05-02 | 云南电网有限责任公司曲靖供电局 | Lightning-protected and anti-unidirectional composite post insulator for power transmission line |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201185110Y (en) | Puncture type lightning protection insulator | |
| CN102157253B (en) | Outer-gap lightning arrester | |
| CN101692572B (en) | Grounding method for composite insulating pole tower of power transmission line and pole tower thereof | |
| CN106098264A (en) | A kind of 10kV Multifunctional disaster prevention evil insulator and preparation method | |
| CN103001142A (en) | Operation method for on-load replacing of 10kV pole-mounted disconnector | |
| CN110648808A (en) | Single-phase grounding-proof lightning puncture-proof insulator for overhead line | |
| CN204905826U (en) | Take disconnector fixed interval overvoltage protection device | |
| CN210692231U (en) | Single-phase grounding prevention type lightning puncture prevention insulator for overhead line | |
| CN102938278B (en) | A kind of anti-thunder insulator for 10KV insulated conductor | |
| CN205943611U (en) | Take pin type composite insulator for 10kV transmission line of voltage -sharing cover | |
| CN202650738U (en) | Electric discharge clamping porcelain insulator | |
| CN201126860Y (en) | Lightning protection terminal holder of insulative conductor | |
| CN203150325U (en) | Lightning-protection post insulator | |
| CN201243159Y (en) | Paracentesis type external clearance arrester | |
| CN206249983U (en) | Polymeric Housed MOA | |
| CN211606057U (en) | Bidirectional lightning protection and disconnection protection device for insulated conductor | |
| CN206657957U (en) | Integrated self arc Multiple level arrester | |
| CN2438213Y (en) | Composite insulation zinc oxide arrester for lightning protection of line | |
| CN2847475Y (en) | Metal oxide lightning arrester with external series gap for protective insulation conductor | |
| CN111739702B (en) | Lightning protection flashover protector | |
| CN214044958U (en) | Lightning arrester | |
| CN110661173A (en) | Multi-cavity lightning flashover limiter | |
| CN217902823U (en) | 10kV fault indication type insulator lightning arrester | |
| CN211578486U (en) | Insulating wire line type lightning protection device | |
| CN107359025A (en) | Utilize the lightning protection pillar insulator of elastic conduction coil increase discharging gap |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200103 |
|
| RJ01 | Rejection of invention patent application after publication |