CN108538524B - Electrode insulation device for transformer neutral point lightning arrester test - Google Patents
Electrode insulation device for transformer neutral point lightning arrester test Download PDFInfo
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- CN108538524B CN108538524B CN201810349488.7A CN201810349488A CN108538524B CN 108538524 B CN108538524 B CN 108538524B CN 201810349488 A CN201810349488 A CN 201810349488A CN 108538524 B CN108538524 B CN 108538524B
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- 238000009413 insulation Methods 0.000 title claims abstract description 59
- 238000012360 testing method Methods 0.000 title claims abstract description 51
- 230000007935 neutral effect Effects 0.000 title claims abstract description 23
- 238000003780 insertion Methods 0.000 claims abstract description 4
- 230000037431 insertion Effects 0.000 claims abstract description 4
- 239000007769 metal material Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 8
- 230000009194 climbing Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 230000005684 electric field Effects 0.000 description 6
- 230000015556 catabolic process Effects 0.000 description 5
- 230000005484 gravity Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- 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
- H01B17/56—Insulating bodies
- H01B17/60—Composite insulating bodies
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/62—Testing of transformers
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention relates to the technical field of auxiliary equipment of power distribution stations, in particular to an electrode insulation device for a transformer neutral point lightning arrester test, which comprises an insulation telescopic rod and an insulation cover, wherein the insulation cover is detachably connected to the insulation telescopic rod, one end of the insulation cover is closed, and the other end of the insulation cover is provided with an opening structure capable of accommodating insertion of a gap electrode; the junction of insulating boot and insulating telescopic link is equipped with the connecting seat, connecting seat and insulating telescopic link swing joint. Before the test, the insulating cover is arranged on the gap electrode by the insulating telescopic rod, so that the insulating ladder is avoided from climbing, the safety belt is used for carrying out high-altitude operation, the operation risk is reduced, the test time is shortened, and the working efficiency is improved. In the test process, the discharge gap is not broken down due to the safety protection effect of the insulating cover, so that the smooth completion of the test is ensured, and the judgment of the direct current leakage test data is not influenced.
Description
Technical Field
The invention relates to the technical field of auxiliary equipment of power distribution stations, in particular to an electrode insulation device for a transformer neutral point lightning arrester test.
Background
With the expansion of the power grid scale, the main variable number of 220kV and above of the transformer substation is gradually increased, each three-winding transformer is provided with at least two neutral point arresters, and the neutral point arresters are all provided with discharge gaps in parallel. Because the neutral point lightning arrester does not have a live test condition, a power failure test is required to be carried out regularly according to the test rule requirement. One of the dc leakage tests requires the application of hundreds of kilovolts of dc voltage. Due to the high test voltage, the arrester must be separated from the discharge gap before testing, or adequate insulation protection must be taken.
At present, two main measures are taken: firstly, dismantling a lead wire or a discharge gap of the lightning arrester, and directly carrying out a pressurization test on the lightning arrester; secondly, the lead is not dismantled, and a barrier is arranged on the electrode by using an insulating glove, an insulating boot and the like, so that the gap breakdown is prevented, and the influence of stray leakage current on test data is eliminated. However, the former requires the operator to tie up a safety belt, uses an insulating ladder to climb up a lightning arrester foundation to perform the operations of dismantling, recovering the lead and discharging the gap, has a narrow standing position, is difficult to fix the safety belt, and takes time and labor for installing and removing the lead; the latter needs the operating personnel to tie up the safety belt, uses insulating ladder to climb on the lightning arrester foundation, places, takes off articles such as insulating gloves, insulating boots. The two methods all need to use insulating ladder, carry out the operation of ascending a height twice altogether before the test, after the test, the operation process risk is high, and the operation process efficiency is lower.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides an electrode insulation device for a transformer neutral point arrester test, which is used for insulating and protecting a neutral point gap electrode, preventing gap breakdown and ensuring that test data judgment is not influenced.
In order to solve the technical problems, the invention adopts the following technical scheme:
The electrode insulation device for the transformer neutral point lightning arrester test is provided, a discharge gap is arranged in parallel between the neutral point lightning arresters, and a gap electrode is arranged at the discharge gap; the electrode insulation device comprises an insulation telescopic rod and an insulation cover, wherein the insulation cover is detachably connected to the insulation telescopic rod, one end of the insulation cover is closed, and an opening structure capable of accommodating insertion of a gap electrode is arranged at one end of the insulation cover; the junction of insulating boot and insulating telescopic link is equipped with the connecting seat, connecting seat and insulating telescopic link swing joint.
According to the electrode insulation device for the transformer neutral point arrester test, before the transformer neutral point arrester direct current leakage power failure test is carried out, the insulation cover is fixed at one end of the insulation telescopic rod, the insulation cover is arranged on the gap electrode through the insulation telescopic rod, climbing of the insulation ladder is avoided, safety belts are used for carrying out high-altitude operation, operation risks are reduced, test time is shortened, and working efficiency is improved. In the test process, the discharge gap is not broken down due to the safety protection effect of the insulating cover, so that the smooth completion of the test is ensured, and the judgment of the direct current leakage test data is not influenced.
Further, the insulating telescopic rod comprises a plurality of telescopic pipes which are sleeved, and a clamping structure for locking the height of the insulating telescopic rod is arranged at the sleeved position of each adjacent telescopic pipe. The insulating cover is arranged on the gap electrode by means of the insulating telescopic rod by adjusting the height of the insulating telescopic rod; the telescopic design of the insulating telescopic rod can be suitable for gap electrodes with different heights, so that climbing of an insulating ladder is avoided, and high-altitude operation is performed by using a safety belt.
Further, the buckle structure comprises a press clamp and a pull pin arranged on the press clamp, the press clamp is arranged on the outer side of the telescopic pipe, and a positioning hole matched with the pull pin is formed in the end portion of the telescopic pipe. When the press clamp is pressed down towards the direction of the telescopic pipe, the pull pin is separated from the positioning hole, and the height of the insulating telescopic rod can be adjusted as required; when the press clamp is pulled away from the telescopic pipe, the pull pin is matched with the positioning hole to realize positioning.
Further, the insulating telescopic rod at least comprises two groups of telescopic pipes which are connected through threads, the outer wall of one group of telescopic pipes is provided with external threads, and the other group of telescopic pipes is provided with screw holes matched with the external threads. The two groups of telescopic pipes in threaded connection enable the height of the insulating telescopic rod to be continuously changed, and the application range of the telescopic rod can be widened.
Further, the insulating cover comprises a conical shell, and the outer side of the conical shell is circumferentially provided with a voltage equalizing cover made of metal materials. The voltage equalizing cover is arranged on one side to realize voltage equalizing for higher test voltage, so that electric field distribution is improved, electric field distortion is prevented, the influence of leakage current on direct current leakage test data is reduced, and creeping discharge or breakdown of the insulating cover is prevented; the insulation cover opening is protected on the other hand, the insulation cover structure is reinforced, and the service life of the insulation cover is prolonged.
Further, be equipped with first cavity and second cavity in the insulating boot, one side of first cavity is equipped with cambered surface structure, the width of second cavity reduces from left to right gradually evenly. The sizes of the first cavity and the second cavity are designed according to the size of the neutral point gap electrode of the transformer, so that the operation of personnel on the ground is facilitated, and the electrode can be quickly and accurately sleeved into the insulating cover shell; the arrangement of the structure of the second cavity is convenient for fixing the position of the gap electrode on one hand and realizing the stepless adjustment of the height position of the insulating cover on the telescopic insulating rod; on the other hand, the occupied space volume and weight are reduced, and the portable bag is convenient to carry.
Further, the opening structure is a horseshoe-shaped clamping notch and a square clamping notch, and the opening area of the square clamping notch is smaller than that of the horseshoe-shaped clamping notch. The opening is larger, so that personnel can operate on the ground conveniently, and the gap electrode can be sleeved into the insulating cover shell rapidly and accurately.
Further, the connecting seat comprises a fixed bottom plate and a fixed ring with an adjustable opening size, the fixed plate is fixedly arranged on the side face of the insulating cover, the fixed ring is arranged on the fixed plate, and the fixed ring is provided with a clamping position matched with the insulating telescopic rod. The connecting seat is used for connecting the insulating cover and the insulating telescopic rod, the insulating cover is fixed on the insulating telescopic rod in the horizontal direction and can slide on the vertical direction of the insulating telescopic rod, after the extending length of the insulating telescopic rod is fixed, if the extending length does not accord with the use height, the relative position of the insulating cover on the insulating telescopic rod can be adjusted in the vertical direction in an electrodeless manner, and the height is ensured to be proper.
Further, the cooperation department of solid fixed ring and insulating telescopic link is equipped with insulating slipmat, increases the frictional force between solid fixed ring and the insulating telescopic link, prevents the gliding that the insulating boot caused under the action of gravity.
Further, the fixed ring comprises a first magic tape and a second magic tape, the first magic tape and the second magic tape are arranged in parallel, and the first magic tape and the second magic tape are arranged on the fixed plate in a penetrating mode. The insulating cover is fixed on the insulating telescopic rod by the first magic tape and the second magic tape, so that the operation is simple and convenient, and the connection is stable and reliable.
Compared with the prior art, the invention has the beneficial effects that:
(1) Before the test, the insulating cover is arranged on the gap electrode by the insulating telescopic rod, so that the insulating ladder is avoided from climbing, the safety belt is used for carrying out high-altitude operation, the operation risk is reduced, the test time is shortened, and the working efficiency is improved. In the test process, the discharge gap is not broken down due to the safety protection effect of the insulating cover, so that the smooth completion of the test is ensured, and the judgment of the direct current leakage test data is not influenced.
(2) The invention is provided with the equalizing cover, realizes equalizing to higher test voltage, improves electric field distribution, prevents electric field distortion, reduces the influence of leakage current on direct current leakage test data, and prevents the insulating cover from generating creeping discharge or breakdown; and can consolidate the insulating boot structure, improve the life of insulating boot.
(3) The width of the second cavity is gradually and uniformly reduced from left to right, so that the position of the gap electrode is conveniently fixed, and the height position of the insulating cover on the telescopic insulating rod is adjusted in an electrodeless manner; on the other hand, the occupied space volume and weight are reduced, and the portable bag is convenient to carry.
Drawings
Fig. 1 is a schematic structural view of an electrode insulation device for a transformer neutral point arrester test.
Detailed Description
The invention is further described below in connection with the following detailed description. Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to be limiting of the present patent; for the purpose of better illustrating embodiments of the invention, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numbers in the drawings of embodiments of the invention correspond to the same or similar components; in the description of the present invention, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely illustrative and should not be construed as limitations of the present patent, and specific meanings of the terms described above may be understood by those skilled in the art according to specific circumstances.
Example 1
As shown in fig. 1, the electrode insulation device for testing the neutral point lightning arresters of the transformer is provided with discharge gaps in parallel, and gap electrodes 6 are arranged at the discharge gaps; the electrode insulation device comprises an insulation telescopic rod 1 and an insulation cover 2, wherein the insulation cover 2 is detachably connected to the insulation telescopic rod 1, one end of the insulation cover 2 is closed, and an opening structure 3 capable of accommodating insertion of a gap electrode 6 is arranged at one end of the insulation cover 2; the junction of insulating boot 2 and insulating telescopic link 1 is equipped with connecting seat 4, and connecting seat 4 and insulating telescopic link 1 swing joint.
According to the embodiment, before a direct current leakage power failure test of a neutral point arrester of a transformer is carried out, the insulating cover 2 is fixed at one end of the insulating telescopic rod 1, the insulating cover 2 is arranged on the gap electrode 6 by means of the insulating telescopic rod 1, an insulating ladder is avoided from climbing, a safety belt is used for carrying out high-altitude operation, the operation risk is reduced, the test time is shortened, and the working efficiency is improved. In the test process, the discharge gap is not broken down due to the safety protection effect of the insulating cover 2, so that the smooth completion of the test is ensured, and the judgment of the direct current leakage test data is not influenced.
Specifically, the insulating telescopic rod 1 comprises a plurality of telescopic tubes 11 which are sleeved, the sleeved parts of the adjacent telescopic tubes 11 are provided with buckle structures for locking the height of the insulating telescopic rod 1, the height of the insulating telescopic rod 1 is adjusted, the insulating telescopic rod is suitable for gap electrodes 6 with different heights, and climbing of insulating ladders and high-altitude operation by using safety belts are avoided. The clamping structure comprises a pressing clamp and a pull pin arranged on the pressing clamp, the pressing clamp is arranged on the outer side of the telescopic pipe 11, a positioning hole matched with the pull pin is formed in the end portion of the telescopic pipe 11, when the pressing clamp is pressed down towards the direction of the telescopic pipe 11, the pull pin is separated from the positioning hole, and the height of the insulating telescopic rod 1 can be adjusted according to requirements; when the press clamp is pulled away from the telescopic pipe 11, the pull pin is matched with the positioning hole to realize positioning. In addition, the insulating telescopic rod 1 at least comprises two groups of telescopic pipes 11 connected through threads, the outer wall of one group of telescopic pipes 11 is provided with external threads, and the other group of telescopic pipes 11 is provided with screw holes matched with the external threads, so that the height of the insulating telescopic rod 1 can be continuously changed, and the application range of the invention can be widened.
As shown in fig. 1, the insulating cover 2 comprises a conical shell, a voltage equalizing cover 5 made of metal materials is arranged on the outer side of the conical shell in a surrounding manner, and on the one hand, voltage equalizing is realized for higher test voltage, electric field distribution is improved, electric field distortion is prevented, the influence of leakage current on direct current leakage test data is reduced, and the insulating cover 2 is prevented from generating creeping discharge or breakdown; on the other hand, the opening of the insulating cover 2 is protected, the structure of the insulating cover 2 is reinforced, and the service life of the insulating cover 2 is prolonged. Wherein, a first cavity and a second cavity are arranged in the insulating cover 2, one side of the first cavity is provided with an arc surface structure, the width of the second cavity is gradually and uniformly reduced from left to right, on one hand, the position of the gap electrode 6 is convenient to fix, and the stepless adjustment of the height position of the insulating cover 2 on the telescopic insulating rod is realized; on the other hand, the occupied space volume and weight are reduced, and the portable bag is convenient to carry.
As shown in fig. 1, the opening structure 3 comprises a horseshoe-shaped clamping notch 31 and a square clamping notch 32, and the opening area of the square clamping notch 32 is smaller than that of the horseshoe-shaped clamping notch 31, so that the electrode can be conveniently and rapidly sleeved into the insulating cover 2 shell by personnel operating on the ground.
As shown in fig. 1, the connection base 4 includes a fixing base 41 and a fixing ring with an adjustable opening size, the fixing plate is fixedly arranged on the side surface of the insulation cover 2, the fixing ring is arranged on the fixing plate and provided with a clamping position 42 matched with the insulation telescopic rod 1, an insulation anti-slip pad is arranged at the matching position of the fixing ring and the insulation telescopic rod 1, the friction force between the fixing ring and the insulation telescopic rod 1 is increased, and the insulation cover 2 is prevented from sliding down caused by gravity. The fixed ring comprises a first magic tape 43 and a second magic tape 44, the first magic tape 43 and the second magic tape 44 are arranged in parallel, the first magic tape 43 and the second magic tape 44 are arranged on the fixed plate in a penetrating mode, and the fixed ring is easy and convenient to operate and stable and reliable to connect.
The specific implementation process of this embodiment is as follows:
The insulating cover 2 is fixedly adhered to the top of the insulating telescopic rod 1 in the horizontal direction through the first magic tape 43 and the second magic tape 44, the insulating telescopic rod 1 is erected on the ground and extends upwards along the Y-axis direction towards the gap electrode 6, when the opening structure 3 of the insulating cover 2 reaches the position of the gap electrode 6, the opening structure 3 of the insulating cover 2 is completely sleeved on the electrode along the X-axis negative direction, the electrode is ensured to touch the bottom of the insulating cover 2, the opening position of the insulating cover 2 is moved along the Z-axis negative direction, and the gap electrode 6 is ensured to be fixed in the square clamping groove; the insulating telescopic rod 1 is continuously extended until the buckling structure at the sleeving part of the adjacent telescopic tube 11 is locked, after the length is fixed, the telescopic insulating rod and the insulating cover 2 are leaned against the neutral point gap electrode 6, the position is finely adjusted, the horizontal stress direction of the insulating cover 2 is the X-axis negative direction, the insulating cover 2 faces the root of the gap electrode 6, and the insulating cover 2 is prevented from falling off in the test process, and the insulating telescopic rod 1 is prevented from toppling.
It is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (4)
1. An electrode insulation device for a transformer neutral point lightning arrester test is characterized in that discharge gaps are arranged in parallel between the neutral point lightning arresters, and gap electrodes are arranged at the discharge gaps; the insulation telescopic rod is characterized by comprising an insulation telescopic rod (1) and an insulation cover (2), wherein the insulation cover (2) is detachably connected to the insulation telescopic rod (1), one end of the insulation cover (2) is closed, and an opening structure (3) capable of accommodating insertion of a gap electrode is arranged at one end of the insulation cover; a connecting seat (4) is arranged at the joint of the insulating cover (2) and the insulating telescopic rod (1), and the connecting seat (4) is movably connected with the insulating telescopic rod (1); the insulation cover (2) comprises a conical shell, and a pressure equalizing cover (5) made of a metal material is arranged on the outer side of the conical shell in a surrounding mode; a first cavity and a second cavity are arranged in the insulating cover (2), one side of the first cavity is provided with an arc surface structure (21), and the width of the second cavity is gradually and uniformly reduced from left to right; the opening structure (3) comprises a horseshoe-shaped clamping notch (31) and a square clamping notch (32), and the opening area of the square clamping notch (32) is smaller than that of the horseshoe-shaped clamping notch (31); the connecting seat (4) comprises a fixed bottom plate (41) and a fixed ring with an adjustable opening size, the fixed bottom plate (41) is fixedly arranged on the side surface of the insulating cover (2), the fixed ring is arranged on the fixed bottom plate (41), and the fixed ring is provided with a clamping and fixing part (42) matched with the insulating telescopic rod (1); an insulating anti-slip pad is arranged at the matching position of the fixed ring and the insulating telescopic rod (1); the fixed ring comprises a first magic tape (43) and a second magic tape (44), wherein the first magic tape (43) and the second magic tape (44) are arranged in parallel, and the first magic tape (43) and the second magic tape (44) are arranged on the fixed bottom plate (41) in a penetrating mode.
2. The electrode insulation device for the transformer neutral point arrester test according to claim 1, wherein the insulation telescopic rod (1) comprises a plurality of telescopic tubes (11) which are sleeved, and a clamping structure for locking the height of the insulation telescopic rod is arranged at the sleeved position of each adjacent telescopic tube (11).
3. The electrode insulation device for the transformer neutral point arrester test according to claim 2, wherein the fastening structure comprises a pressing clamp and a pull pin arranged on the pressing clamp, the pressing clamp is arranged on the outer side of the telescopic tube, and a positioning hole matched with the pull pin is formed in the end portion of the telescopic tube.
4. The electrode insulation device for testing a neutral point arrester of a transformer according to claim 2, wherein the insulation telescopic rod (1) at least comprises two groups of telescopic tubes (11) connected through threads, the outer wall of one group of telescopic tubes is provided with external threads, and the other group of telescopic tubes is provided with screw holes matched with the external threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810349488.7A CN108538524B (en) | 2018-04-18 | 2018-04-18 | Electrode insulation device for transformer neutral point lightning arrester test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810349488.7A CN108538524B (en) | 2018-04-18 | 2018-04-18 | Electrode insulation device for transformer neutral point lightning arrester test |
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| Publication Number | Publication Date |
|---|---|
| CN108538524A CN108538524A (en) | 2018-09-14 |
| CN108538524B true CN108538524B (en) | 2024-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810349488.7A Active CN108538524B (en) | 2018-04-18 | 2018-04-18 | Electrode insulation device for transformer neutral point lightning arrester test |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112180226A (en) * | 2020-09-24 | 2021-01-05 | 广东电网有限责任公司佛山供电局 | A appurtenance for arrester high-voltage testing |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0387865A1 (en) * | 1989-03-17 | 1990-09-19 | Oy Sekko Ab | Spark protection device for insulated conductors, particularly for air lines |
| CN103515918A (en) * | 2012-06-26 | 2014-01-15 | 3M创新有限公司 | Voltage-sharing cover assembly |
| CN204101590U (en) * | 2014-10-22 | 2015-01-14 | 广西电网有限责任公司桂林供电局 | Transformer neutral point test of lightning arrester insulating shielding device |
| CN206819820U (en) * | 2017-06-22 | 2017-12-29 | 广州供电局有限公司 | The insulation protective hood of arrester |
| CN208014456U (en) * | 2018-04-18 | 2018-10-26 | 广东电网有限责任公司 | A kind of transformer neutral point test of lightning arrester electrode insulation |
-
2018
- 2018-04-18 CN CN201810349488.7A patent/CN108538524B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0387865A1 (en) * | 1989-03-17 | 1990-09-19 | Oy Sekko Ab | Spark protection device for insulated conductors, particularly for air lines |
| CN103515918A (en) * | 2012-06-26 | 2014-01-15 | 3M创新有限公司 | Voltage-sharing cover assembly |
| CN204101590U (en) * | 2014-10-22 | 2015-01-14 | 广西电网有限责任公司桂林供电局 | Transformer neutral point test of lightning arrester insulating shielding device |
| CN206819820U (en) * | 2017-06-22 | 2017-12-29 | 广州供电局有限公司 | The insulation protective hood of arrester |
| CN208014456U (en) * | 2018-04-18 | 2018-10-26 | 广东电网有限责任公司 | A kind of transformer neutral point test of lightning arrester electrode insulation |
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| CN108538524A (en) | 2018-09-14 |
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