CN109406914B - Laboratory test device and method for high-voltage electric field environment - Google Patents
Laboratory test device and method for high-voltage electric field environment Download PDFInfo
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- CN109406914B CN109406914B CN201811524558.4A CN201811524558A CN109406914B CN 109406914 B CN109406914 B CN 109406914B CN 201811524558 A CN201811524558 A CN 201811524558A CN 109406914 B CN109406914 B CN 109406914B
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- 230000005684 electric field Effects 0.000 title claims abstract description 37
- 238000009533 lab test Methods 0.000 title claims abstract description 9
- 238000000034 method Methods 0.000 title abstract description 7
- 238000012360 testing method Methods 0.000 claims abstract description 27
- 238000005260 corrosion Methods 0.000 claims description 27
- 230000007797 corrosion Effects 0.000 claims description 27
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010425 asbestos Substances 0.000 claims description 9
- 229910052895 riebeckite Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 239000012212 insulator Substances 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- 239000011889 copper foil Substances 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 claims description 2
- 238000010998 test method Methods 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 7
- 238000009826 distribution Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000007769 metal material Substances 0.000 description 7
- 230000001105 regulatory effect Effects 0.000 description 5
- 238000004088 simulation Methods 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000013142 basic testing Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004626 scanning electron microscopy Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1218—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using optical methods; using charged particle, e.g. electron, beams or X-rays
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention provides a laboratory test device and a laboratory test method for a high-voltage electric field environment, wherein the device comprises: a disc-shaped upper polar plate and a disc-shaped lower polar plate with the same shape and size; the disc edges of the upper polar plate and the lower polar plate are respectively provided with an equalizing ring; the bottoms of the upper polar plate and the lower polar plate are parallel and oppositely arranged; the upper polar plate is connected with a high-voltage test transformer; the lower polar plate is grounded. The electric field distribution tester is simple in manufacture and low in cost, fully utilizes conventional components which can be contacted in an electric power test, achieves the design purpose, has excellent performance, and provides uniform electric field distribution and a suitable test platform. The device of the embodiment generates a uniform enough electric field between the upper polar plate and the lower polar plate, and can flexibly adjust the electric field strength by controlling the distance between the upper polar plate and the lower polar plate; the chassis of the lower polar plate is used as a test platform, so that a wide enough operation space is provided, and various test operations can be easily performed.
Description
Technical Field
The invention belongs to the field of electric power tests, and particularly relates to a high-voltage electric field environment laboratory test device and method.
Background
In a high-temperature coastal environment, the corrosion of key metal materials in the power system is serious, so that the maintenance cost is high. The current research is focused on the influence of the corrosion environment on the metal material or the influence of the concentrated electric field/magnetic field on the use behavior of the metal material, while the electric power system metal material is in service in the atmosphere environment of the strong alternating electric field, and the influence of the electromagnetic field and the use environment on the use behavior of the metal material is still blank in the research at present. Therefore, the design of the corrosion device which is simple, convenient, easy to operate, safe, reliable and applied to the high electric field is very important for simulating and researching the influence of the electric field and the corrosion medium on the service behavior of the metal material.
Disclosure of Invention
The main purpose of the scheme provided by the invention is to provide a safe, reliable and easy-to-implement device, which can flexibly adjust and control the electric field intensity, can be matched with the implementation of various corrosion tests, and provides a basic implementation basis for researching the influence of the electric field intensity on the corrosion behavior of metal materials.
The invention adopts the following technical scheme:
a high voltage electric field environmental laboratory test apparatus, comprising: a disc-shaped upper polar plate and a disc-shaped lower polar plate with the same shape and size; the disc edges of the upper polar plate and the lower polar plate are respectively provided with an equalizing ring; the bottoms of the upper polar plate and the lower polar plate are parallel and oppositely arranged; the upper polar plate is connected with a high-voltage test transformer; the lower polar plate is grounded.
Preferably, the upper polar plate is hung on the insulating bracket through a plurality of insulating ropes, the tray bottom is downward, and the upper polar plate is leveled through a level bubble; the lower polar plate is placed on the horizontal plate, and the chassis is upward.
Preferably, the insulating rope is a dust-free asbestos torsion rope.
Preferably, the insulating support is made of insulators.
Preferably, the upper polar plate and the lower polar plate are made of stainless steel; the equalizing ring is a circular ring pipe with the surface covered by copper foil or tin foil.
Preferably, the bottoms of the upper polar plate and the lower polar plate are round planes, and the edges of the bottoms of the plates are in transition to the plate wall by rounding corners.
Preferably, the upper polar plate is connected with the high-voltage test transformer through a steel pipe, a protection resistor is arranged on the steel pipe, and equalizing rings are arranged at two ends of the protection resistor.
Preferably, the protection resistor is a water resistor with a resistance value of 80kΩ.
Preferably, the upper polar plate and the lower polar plate are two groups, and the two upper polar plates are connected in series and are connected with a high-voltage test transformer.
And a test method according to the above provided test device, characterized by comprising the steps of:
step S1: sealing the edge of the corrosion sample through insulating glue, and placing the corrosion sample on the bottom of the lower polar plate;
step S2: dropwise adding corrosive liquid to the upper surface of the corrosion sample;
step S3: and electrifying the upper polar plate, and recording the corrosion condition of the corrosion sample.
The device provided by the invention has the advantages of simple design and manufacture and low cost, fully utilizes the conventional components which can be contacted in the electric power test, realizes the design purpose, has excellent performance, and provides uniform electric field distribution and a suitable test platform. The device of the embodiment generates a uniform enough electric field between the upper polar plate and the lower polar plate, and can flexibly adjust the electric field strength by controlling the distance between the upper polar plate and the lower polar plate; the chassis of the lower polar plate is used as a test platform, so that a wide enough operation space is provided, and various test operations can be easily performed; because the whole test device has simple structure and smaller volume, the whole test device can be matched with other equipment to flexibly build simulation environments required by various tests. The device also adopts the mode of shielding the tips of the electrode disc, the conduit, the protective resistor junction and the like by the equalizing ring, so that the device can operate more stably, the safety is greatly improved, and the device can still operate stably and safely in an electric field environment with the intensity of 750KV/m.
Drawings
The invention is described in further detail below with reference to the attached drawings and detailed description:
FIG. 1 is a schematic perspective view of the overall structure of an embodiment of the present invention;
FIG. 2 is a schematic side view of the overall structure of an embodiment of the present invention;
FIG. 3 is a schematic diagram of a protection resistor setting mode according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of simulation results of potential distribution in a state of use of an embodiment of the present invention;
in the figure: 1-an upper polar plate; 2-a lower polar plate; 3-equalizing rings (for upper and lower plates); 4-a dust-free asbestos torsion rope; 5-steel pipe; 6-protection resistance; 61-grading ring (for protection of the resistor); 7-conducting wires.
Detailed Description
In order to make the features and advantages of the present patent more comprehensible, embodiments accompanied with figures are described in detail below:
as shown in fig. 1 and 2, the apparatus of this embodiment includes: the disc-shaped upper polar plate 1 and the lower polar plate 2 with the same shape and size, the disc bottoms of the upper polar plate 1 and the lower polar plate 2 are circular planes, and the edge of the disc bottom is transited to the disc (side) wall by a rounded corner; the upper polar plate 1 and the lower polar plate 2 are made of stainless steel.
The upper polar plate 1 and the lower polar plate 2 are respectively provided with an equalizing ring 3 along the edges, and the equalizing rings 3 are circular ring pipes with the surfaces covered by copper foil or tin foil; the bottoms of the upper polar plate 1 and the lower polar plate 2 are parallel and opposite. The upper polar plate 1 is suspended on an insulating bracket formed by an insulator through a plurality of dust-free asbestos torsion ropes 4 (at least three ropes are needed to be in triangular symmetry, four ropes are adopted in the embodiment), the bottom of the plate is downward, and the plate is leveled through a high-precision level bubble; the lower pole plate 2 is placed on a horizontal plate to maintain a horizontal state with the chassis facing upward.
As shown in fig. 1 and 3, the upper electrode plate 1 is connected to a protection resistor 6 through a steel pipe 5, the protection resistor 6 is connected to a high-voltage test transformer (high-voltage generator) through a lead wire 7 (or through the steel pipe 5), equalizing rings 61 are also arranged at both ends of the protection resistor 6, and the lower electrode plate 2 is grounded.
The safety design of the experimental device is particularly important in the test under the high-pressure condition, and the control system can generate more than 10-20A of current due to the existence of fine leakage current at the high-pressure part, so that safety accidents are extremely easy to cause in the long-term operation process. In the design provided in the present embodiment, since there are inevitably cases such as a tip and the like in the case where fine processing is lacking in the mouth of the stainless steel disk, the junction of the stainless steel disk and the wire 7, and the junction of the protection resistor 6 and the wire 7, the tip is liable to generate leakage current. In the embodiment, the equalizing ring 3 is creatively added at the stainless steel disc opening, so that the safety operation of the experiment can be ensured at the shielding tip. The grading ring 3 shields the tip in the experimental device, and improves the safety of the device.
In this embodiment, the insulating string suspending the upper plate 1 may be a dust-free asbestos torsion string 4. The upper polar plate 1 is hung on the upper bracket through the dust-free asbestos torsion rope 4, and the electric field is not easy to break down due to the fact that the relative dielectric constant of air between the upper polar plate and the lower polar plate is 1.000585 and the hanging design is adopted. The upper plate 1 can now be increased by a higher voltage without breakdown. And the height of the upper polar plate 1 is adjusted through the insulating rope, so that the electric field strength can be adjusted under the condition of not changing the voltage, and the electric field is convenient and quick.
The protection resistor 6 adopts a high-resistance water resistor, and the solution in the resistor is deionized water. The resistance was about 80kΩ.
Each group of upper polar plates 1 is connected by thick wires which are wrapped with a uniform pressure tube, and the existence of tips can be reduced. More directly, the present embodiment uses the steel pipe 5 to replace the wire as the connecting material, and the wire is very thin, and the diameter of the wire is very small, which is just a tip, so the steel pipe 5 is safer.
The potential distribution of the device of the embodiment is simulated by simulation software COMSOL Multiphysics 5.2.5.2, a section view of a simulation result is shown in fig. 3, the simulation model adopts an upper polar plate and a lower polar plate of 100mm, the upper polar plate 1 is 40KV, and the lower polar plate 2 is grounded. It can be seen that the middle regions of the upper and lower plates are substantially uniformly distributed in the electric field.
By adjusting the distance between the upper polar plate and the lower polar plate and changing the external transformer, different high voltages can be obtained.
Example 1: the insulator is adopted to form a bracket, the upper polar plate 1 is hung through the dust-free asbestos torsion rope 4, the height of the upper polar plate 1 is adjusted, the distance between the upper polar plate and the lower polar plate is 8cm and 4cm, and the level is adjusted by using a level bubble. The light transformer is regulated to an effective value of 16KV, so that an alternating electric field is generated by the electrode plates. The effective value of the electric field intensity is 200KV/m and 400KV/m. Stable operation is carried out for 14 x 24 hours, and no abnormal phenomenon exists.
Example 2: the insulator is adopted to form a bracket, the upper polar plate 1 is hung through the dust-free asbestos torsion rope 4, the height of the upper polar plate 1 is adjusted, the distance between the upper polar plate and the lower polar plate is 10cm and 5cm, and the level is adjusted by using a level bubble. The light transformer is regulated to an effective value of 30KV, so that an alternating electric field is generated by the electrode plates. The effective value of the electric field intensity is 300KV/m and 600KV/m. Stable operation is carried out for 10 x 24 hours, and no abnormal phenomenon exists.
Example 3: the insulator is adopted to form a bracket, the upper polar plate 1 is hung through the dust-free asbestos torsion rope 4, the height of the upper polar plate 1 is adjusted, the distance between the upper polar plate and the lower polar plate is 8cm and 5cm, and the level is adjusted by using a level bubble. The light transformer is regulated to an effective value of 30KV, so that an alternating electric field is generated by the electrode plates. The effective value of the electric field intensity is 375KV/m and 750KV/m. Stable operation is carried out for 7 x 24 hours, and no abnormal phenomenon exists.
On the basis, different corrosion environments can be simulated by changing the liquid on the surface of the experimental material on the polar plate. Meanwhile, two groups of upper polar plates 1 and lower polar plates 2 can be arranged, the two upper polar plates 1 are connected in series and are connected with a high-voltage test transformer so as to obtain the same high-voltage input, the distances between the upper polar plates 1 and the lower polar plates 2 are different so as to obtain different potential distributions, and the upper polar plates and the lower polar plates are mutually used as comparison groups, so that corresponding comparison tests can be carried out.
The basic test method thus constructed mainly comprises the following steps:
step S1: sealing the edge of the corrosion sample through insulating glue, and placing the corrosion sample on the bottom of the lower polar plate 2;
step S2: quantitatively dripping corrosive liquid to the upper surface of the corrosive sample;
step S3: the upper electrode plate 1 is electrified, and the corrosion condition of the corrosion sample is observed and recorded.
In one specific test example:
an aluminum 5052 alloy with the specification of 20mm multiplied by 2mm is used as a corrosion sample, the sample is packaged, and only the surface of 20mm multiplied by 20mm is exposed to be used as a corrosion area. The voltage of the light transformer is regulated to 20KV, and the distance between the upper polar plate and the lower polar plate is regulated to 100mm and 50mm. At this time, the strength of the two electric fields is 200KV/m and 400KV/m respectively. The 2×8 samples were placed on two sample stations for etching. The etching solution was precisely dropped by a 100. Mu.L pipette and was uniformly covered. A cycle of 12 hours and one cycle. After 30 days of corrosion, scanning electron microscopy tests were performed.
The results show that at the electric field strength of 0KV/m, few corrosion oxidation products appear on the surface of the aluminum alloy, and no cracks appear on the surface of the substrate. Under the electric field intensity of 200KV/m, more fine corrosion oxidation products appear on the surface, and a plurality of cracks appear on the surface. Under the electric field intensity of 400KV/m, pits are formed on the surface of the aluminum alloy, and a part of the area is porous. It can be seen that the corrosion of aluminum alloys is promoted under electric field conditions.
The present patent is not limited to the above-mentioned best mode, any person can obtain other various types of laboratory test devices and methods for high-voltage electric field environment under the teaching of the present patent, and all equivalent changes and modifications made according to the scope of the present patent application shall be covered by the present patent.
Claims (2)
1. A high voltage electric field environmental laboratory test apparatus, comprising: a disc-shaped upper polar plate and a disc-shaped lower polar plate with the same shape and size; the disc edges of the upper polar plate and the lower polar plate are respectively provided with an equalizing ring; the bottoms of the upper polar plate and the lower polar plate are parallel and oppositely arranged; the upper polar plate is connected with a high-voltage test transformer; the lower polar plate is grounded;
the upper polar plate is hung on the insulating bracket through a plurality of insulating ropes, the tray bottom is downward, and the upper polar plate is leveled through a level bubble; the lower polar plate is arranged on the horizontal plate, and the chassis is upward;
the insulating rope is a dust-free asbestos torsion rope;
the insulating bracket is formed by an insulator;
the upper polar plate and the lower polar plate are made of stainless steel; the equalizing ring is a circular ring pipe with the surface covered by copper foil or tin foil;
the plate bottoms of the upper polar plate and the lower polar plate are round planes, and the edges of the plate bottoms are transited to the plate wall by rounded corners;
the upper polar plate is connected with a high-voltage test transformer through a steel pipe, a protection resistor is arranged on the steel pipe, and equalizing rings are arranged at two ends of the protection resistor;
the protection resistor is a water resistor with a resistance value of 80KΩ;
the upper polar plate and the lower polar plate are in two groups, and the two upper polar plates are connected in series and are connected with a high-voltage test transformer.
2. The method of testing a laboratory test set-up for a high voltage electric field environment according to claim 1, comprising the steps of:
step S1: sealing the edge of the corrosion sample through insulating glue, and placing the corrosion sample on the bottom of the lower polar plate;
step S2: dropwise adding corrosive liquid to the upper surface of the corrosion sample;
step S3: and electrifying the upper polar plate, and recording the corrosion condition of the corrosion sample.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811524558.4A CN109406914B (en) | 2018-12-13 | 2018-12-13 | Laboratory test device and method for high-voltage electric field environment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811524558.4A CN109406914B (en) | 2018-12-13 | 2018-12-13 | Laboratory test device and method for high-voltage electric field environment |
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| Publication Number | Publication Date |
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| CN109406914A CN109406914A (en) | 2019-03-01 |
| CN109406914B true CN109406914B (en) | 2024-02-09 |
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Families Citing this family (1)
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| CN110658434A (en) * | 2019-11-14 | 2020-01-07 | 国网冀北电力有限公司电力科学研究院 | Fault suppression system for common-frequency and same-phase voltage withstand test of three-phase common-cylinder GIS equipment |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003028914A (en) * | 2001-07-12 | 2003-01-29 | Electric Power Dev Co Ltd | Method of evaluating and testing polarity inverting ability of high-voltage insulated equipment for dc power transmission |
| RU2011150455A (en) * | 2011-12-12 | 2013-06-20 | Общество с ограниченной ответственностью "Рубин" | DEVICE FOR DETERMINING VIOLATIONS OF INTEGRITY OF INSULATION OF WIRES |
| CN103823166A (en) * | 2014-02-28 | 2014-05-28 | 武汉大学 | Fatigue test device and method for solid insulation degradation process |
| CN203950013U (en) * | 2014-06-04 | 2014-11-19 | 国家电网公司 | A kind of adjustable high-potting needle plate defect model |
| WO2016143030A1 (en) * | 2015-03-09 | 2016-09-15 | 株式会社島津製作所 | Parallel plate-type non-uniform electric field ion mobility spectrometry device |
| CN107544000A (en) * | 2016-06-29 | 2018-01-05 | 中国电力科学研究院 | A kind of plate electrode type standard capacitor and outside method for equalizing voltage |
| CN208125865U (en) * | 2018-04-28 | 2018-11-20 | 广东电网有限责任公司 | High-potting Anti-breakdown device and the anti-breakdown component of high-potting |
| CN209311600U (en) * | 2018-12-13 | 2019-08-27 | 国网福建省电力有限公司 | High voltage electric field environmental laboratory experimental rig |
-
2018
- 2018-12-13 CN CN201811524558.4A patent/CN109406914B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003028914A (en) * | 2001-07-12 | 2003-01-29 | Electric Power Dev Co Ltd | Method of evaluating and testing polarity inverting ability of high-voltage insulated equipment for dc power transmission |
| RU2011150455A (en) * | 2011-12-12 | 2013-06-20 | Общество с ограниченной ответственностью "Рубин" | DEVICE FOR DETERMINING VIOLATIONS OF INTEGRITY OF INSULATION OF WIRES |
| CN103823166A (en) * | 2014-02-28 | 2014-05-28 | 武汉大学 | Fatigue test device and method for solid insulation degradation process |
| CN203950013U (en) * | 2014-06-04 | 2014-11-19 | 国家电网公司 | A kind of adjustable high-potting needle plate defect model |
| WO2016143030A1 (en) * | 2015-03-09 | 2016-09-15 | 株式会社島津製作所 | Parallel plate-type non-uniform electric field ion mobility spectrometry device |
| CN107544000A (en) * | 2016-06-29 | 2018-01-05 | 中国电力科学研究院 | A kind of plate electrode type standard capacitor and outside method for equalizing voltage |
| CN208125865U (en) * | 2018-04-28 | 2018-11-20 | 广东电网有限责任公司 | High-potting Anti-breakdown device and the anti-breakdown component of high-potting |
| CN209311600U (en) * | 2018-12-13 | 2019-08-27 | 国网福建省电力有限公司 | High voltage electric field environmental laboratory experimental rig |
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