CN209231460U - The scene extra-high voltage SF6 exchanges Insulation Test reactor - Google Patents
The scene extra-high voltage SF6 exchanges Insulation Test reactor Download PDFInfo
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- CN209231460U CN209231460U CN201822047892.7U CN201822047892U CN209231460U CN 209231460 U CN209231460 U CN 209231460U CN 201822047892 U CN201822047892 U CN 201822047892U CN 209231460 U CN209231460 U CN 209231460U
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- 238000012360 testing method Methods 0.000 title claims abstract description 46
- 238000009413 insulation Methods 0.000 title claims abstract description 33
- 239000004020 conductor Substances 0.000 claims abstract description 48
- 238000013461 design Methods 0.000 claims abstract description 16
- 238000004804 winding Methods 0.000 claims description 26
- 229910052751 metal Inorganic materials 0.000 claims description 24
- 239000002184 metal Substances 0.000 claims description 24
- 239000000725 suspension Substances 0.000 claims description 21
- 230000007704 transition Effects 0.000 claims description 21
- 230000005684 electric field Effects 0.000 claims description 16
- 239000012212 insulator Substances 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 7
- 239000004411 aluminium Substances 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 abstract description 5
- 238000005457 optimization Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 238000012857 repacking Methods 0.000 abstract description 3
- 238000004088 simulation Methods 0.000 description 8
- 238000010276 construction Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- VMQPMGHYRISRHO-UHFFFAOYSA-N benzvalene Chemical group C1=CC2C3C1C32 VMQPMGHYRISRHO-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010616 electrical installation Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
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- Testing Relating To Insulation (AREA)
Abstract
The utility model provides a kind of scene extra-high voltage SF6 exchange Insulation Test reactor, the ac voltage withstanding and partial discharge test of ultra-high voltage GIS equipment or transformer suitable for 1200kV and following voltage class.The utility model joined the higher partial pressure screen of precision instead of the pillar divider in conventional high-tension test to carry out voltage measurement in the main tank base of SF6 reactor；The length of conductor diameter and shielding cylinder in casing length and casing also passes through optimization design；Measure is pressed to use the inflatable grading ring convenient for scene handling in top.The integrated reactor designed through above method, which has many advantages, such as to cooperate in testing ground without crane, can be completed handling, saves the time and manpower, safety coefficient are high.The utility model can be placed on the flat car after repacking, to realize the flexible transhipment of testing ground.
Description
Technical field
The utility model relates to insulation of electrical installation detection technique field, the exchange of the scene specifically a kind of extra-high voltage SF6 is exhausted
Edge tests reactor.
Background technique
China 1000kV AC extra high voltage engineering and ± 1100kV DC transmission engineering have entered the all-round construction stage.As
The Field AC Withstand Voltage Test and partial discharge test of one of extra-high voltage project main equipment, extra-high voltage GIS and transformer are detections
The mostly important technological means of security performance before it puts into operation, Guo Wang company is to the check requirements of its live Insulation Test also from former
80% factory-said value be increased to 100%, i.e. 1100kV.But the On-Site Testing of current extra-high voltage GIS and transformer makes
With bulk type series resonance testing device, usually by more piece pillar reactor, divider, two major diameter grading rings and other attached set
Standby composition needs largely lifting, assembling and handling work at the scene, in substation, converter station and other complicated construction sites
In, it takes up a large area, the construction time is long, the defect of risk management and control hardly possible obviously appears, especially prohibits in valve hall etc.
Only crane enters is not available in interior place.
Utility model content
The purpose of this utility model is to provide a kind of scenes extra-high voltage SF6 to exchange Insulation Test reactor, compared to scattered
The pillar reactor and divider of dress, with it is small in size, be easy to site layout project and to can be used for developing vehicular Insulation Test flat
It is the characteristics of platform, high degree of automation, safe and reliable.
A kind of scene extra-high voltage SF6 exchange Insulation Test reactor, it is characterised in that: including successively arrange main tank body,
Transition tank, casing, grading ring include reactance component in main tank body, and transition tank is set between main tank body and casing, transition tank with
Casing is connected by middle part metal flange, and grading ring and casing are by top metal flanged joint, between main tank body and transition tank
It is connected by disc insulator, includes the conductor for drawing reactor high-voltage end in casing, improves end conductor field distribution
Upper grading shield and the earth shield cylinder and suspension shielding cylinder for improving the distribution of conductor surrounding electric field, main tank base are equipped with partial pressure
Screen.
Further, disc insulator is isolated by the gas chamber of the gas chamber of main tank body and transition tank, casing, transition tank and casing
Gas chamber connection, filled with SF6 gas as dielectric in two gas chambers.
Further, conductor diameter is designed as 150mm, and conductor and casing length are designed as 7.0m.
Further, the intracorporal reactance component of the main tank includes iron core and two groups of windings.
Further, iron core in main tank body it is parallel with winding two sides with one piece of screen is separately installed at winding direction of winding
Shield plate, the eddy-current heating generated on the shell for reducing winding magnetic field；The upper and lower ends of two windings are separately installed with winding
Grading ring, the field strength sharply located for uniform winding edge.
Further, partial pressure screen is an aluminium sheet identical with main tank base arc shape, by four insulation columns and
Main tank base is fixed, and line space design is 1~2cm；Partial pressure screen and main tank body between forms capacitor, the voltage on the capacitor with
The voltage linear relationship of conductor is used as divider and measures test voltage.
Further, between earth shield cylinder and middle part metal flange directly by metal connect, suspension shielding cylinder with connect
It is connected between ground shielding cylinder by insulation column.
Further, inflatable grading ring group is made of upper and lower two inflatable grading rings and intermediate keel, Mei Gejun
Pressure ring adds the structure for being applied with conductive fabric using rubber liner.
Further, main tank body and transition tank total length are 4.0m.
Further, jacket exterior is equipped with plastic umbrella skirt.
The utility model joined the higher partial pressure screen of precision in the main tank base of SF6 reactor and try instead of conventional high-tension
Pillar divider in testing is to carry out voltage measurement；The length of conductor diameter and shielding cylinder in casing length and casing also passes through
Cross optimization design；Top presses measure to use the inflatable grading ring convenient for scene handling, the integration designed through above method
Reactor has many advantages, such as that handling can be completed without crane cooperation in testing ground, saves the time and manpower, safety coefficient are high.
The utility model can be placed on the flat car after repacking, to realize the flexible transhipment of testing ground
Detailed description of the invention
Fig. 1 is a kind of front view of the utility model scene extra-high voltage SF6 exchange Insulation Test reactor；
Fig. 2 is a kind of transparent front view of the utility model scene extra-high voltage SF6 exchange Insulation Test reactor；
Fig. 3 is a kind of transparent top view of the utility model scene extra-high voltage SF6 exchange Insulation Test reactor；
Fig. 4 is the front view inside a kind of the utility model scene extra-high voltage SF6 exchange Insulation Test reactor；
Fig. 5 is the top view inside a kind of the utility model scene extra-high voltage SF6 exchange Insulation Test reactor；
Fig. 6 is the reactor jacket exterior simulation value that maximum field strength changes with conductor diameter everywhere of the utility model；
Fig. 7 is the reactor inside pipe casing simulation value that maximum field strength changes with conductor diameter everywhere of the utility model；
Fig. 8 is the reactor jacket exterior simulation value that maximum field strength changes with conductor length everywhere of the utility model；
Fig. 9 is the reactor inside pipe casing simulation value that maximum field strength changes with conductor length everywhere of the utility model.
Table 1 be the utility model reactor casing inside and outside everywhere maximum field strength with suspension shielding cylinder, earth shield cylinder
The simulation value of length variation.
In figure: 1-main tank body, 2-disc insulators, 3-transition tanks, 4-middle part metal flanges, 5-casings, 6-
Pressure ring, 7-top metal flanges, 8-iron cores, 9-windings, 10-winding grading rings, 11-barricades, 12-partial pressure screens,
Grading shield under 13-conductors, 14-upper grading shields, 15-conductors, 16-ground connection additional mask cylinders, 17-ground connection main shield cylinders,
18-suspension additional mask cylinders, 19-suspension main shield cylinders.
Specific embodiment
Below in conjunction with the attached drawing in the utility model, the technical solution in the utility model is carried out clearly and completely
Description.
Fig. 1-5 is please referred to, the utility model scene extra-high voltage SF6 exchanges the one of embodiment packet of Insulation Test reactor
The main tank body 1 successively arranged, transition tank 3, casing 5, grading ring 6 are included, wherein includes reactance component, transition tank 3 in main tank body 1
Connection between main tank body 1 and casing 5, for reinforcing between main tank body 1 and casing 5.During transition tank 3 and casing 5 pass through
Portion's metal flange 4 connects, and grading ring 6 and casing 5 are connected by top metal flange 7.Plastic umbrella skirt, top are equipped with outside casing 5
Portion is equipped with top metal flange 7, and grading ring 6 is fixed on top metal flange 7.Pass through benzvalene form between main tank body 1 and transition tank 3
Insulator 2 connects, and main tank body 1 and transition tank 3, grading ring 6 are isolated into two independent air chambers, two gas chambers by disc insulator 2
In filled with SF6 gas as dielectric.
Iron core 8 and two groups of windings 9 comprising composition reactance component in main tank body 1, also comprising for improving internal electric field point
Grading shield 13 under the winding grading ring 10 of cloth, barricade 11 and conductor, and replace the partial pressure screen of the external pillar divider of tradition
12。
Upper grading shield 14 comprising the conductor 15, improvement 15 Analysis of End Electric Field of conductor distribution of drawing high pressure in casing 5, and
Improve the earth shield cylinder and suspension shielding cylinder of the distribution of 15 surrounding electric field of conductor.Upper grading shield 14 is located at the upper of disc insulator 2
Square, shielding cylinder lower section, is that metallicity is connect with conductor 15.Suspension shielding cylinder and conductor 5 are connectionless, with middle part metal flange 4
It is connected with epoxy resins insulation part, earth shield cylinder is connect with 4 metallicity of middle part metal flange.
The length of conductor 15, the length of diameter and each shielding cylinder pass through the optimization based on finite element simulation, in design
The length of conductor 15 Yu casing 5 is shortened, and inside pipe casing field strength is reduced to the greatest extent, the case where reducing shelf depreciation probability
Under decrease weight of equipment and transport difficulty.
The design of 1 iron core 8, winding 9 and pressure measure is as shown in Figure 2,3 in main tank body: 1 iron core 8 in main tank body
It is parallel with 9 two sides of winding at winding direction of winding, one piece of barricade 11 is mounted in upper and lower, with grading shield 13 under conductor
Together for reducing the eddy-current heating that winding magnetic field generates on the shell；In the upper and lower ends of two windings 9, it is mounted on one
Winding grading ring 10, the field strength sharply located for uniform winding edge.
The design of capacitance partial pressure screen is as shown in Figure 2,3 in main tank body 1: partial pressure screen 12 is one and 1 bottom cambered surface of main tank body
The identical aluminium sheet of shape is fixed by four insulation columns and 1 bottom of main tank body, and spacing can be designed as 1~2cm as needed, screen
Shape it is identical as 1 bottom of main tank body.Capacitor is formed between partial pressure screen 12 and main tank body 1, the voltage on the capacitor and conductor 15
Voltage linear relationship, therefore by measurement partial pressure screen 12 on voltage, the working voltage of reactor can be measured.Practical operation
In, the voltage of partial pressure screen upper 12 is guided to outside reactor by lead and realizes voltage measurement.This design can save biography
Matching used pillar divider needed for system test reactor, increases the integrated level of device, reduces volume and weight, reduce
Cost；And compared to pillar divider, which is in the metal shell of main tank body 1, will not be put to the test scene other
The influence of large scale equipment and change intrinsic standoff ratio, therefore improve the precision of field test voltage value.Finally, being needed before putting equipment in service
Partial pressure screen is verified.
Casing 5 and its inside conductor 15, shielding cylinder optimization design as shown in Fig. 2,3,4,5: be equipped with inside casing 5
Both earth shield cylinder and suspension shielding cylinder collective effect reduce the electric field strength at 15 edge of conductor and middle part metal flange 4.
Directly connected by metal between earth shield cylinder and middle part metal flange, suspension shielding cylinder and earth shield cylinder it
Between connected by insulation column, every group of shielding cylinder is divided into main shield cylinder and additional mask cylinder two parts again, and additional mask cylinder adheres to
On main shield cylinder, for reducing the electric field strength of main shield cylinder end.Wherein suspension shielding cylinder includes suspension main shield cylinder
19, suspension additional mask cylinder 18, earth shield cylinder include ground connection main shield cylinder 17, ground connection additional mask cylinder 16.Earth shield cylinder
Ground connection additional mask cylinder 16 be located at the lower part of ground connection main shield cylinder 17, the suspension additional mask cylinder 18 of suspension shielding cylinder is located at outstanding
The top of floating main shield cylinder 19.The length of two groups of shielding cylinders and the diameter of conductor 15 can all influence the maximum field of 5 inside and outside of casing
By force.In addition, the length of conductor 15 also determines the length of casing 5 and the weight of device, while also affecting inner electric field and outer electric field intensity.
To optimize 5 inside field strength of casing, finite element electric field simulation analysis is carried out using ANSYS software, according to simulation result, conductor 15
Length is to meet the 7.0m of Insulation Test requirement to meet the insulating requirements of outside air Yu inside SF6, therefore to shorten casing
It is 7.0m by 5 Design of length of casing for the purpose of reducing installation weight.15 diameter of conductor, length and suspension main shield cylinder, ground connection master
Shown in the result that shielding cylinder length emulates casing inside and outside electric field strength such as Fig. 6~9 and table 1.
Table 1
Electric field of the casing inside and outside under 1200kV virtual value test voltage (peak value 1697kV) is optimized point below
Analysis.
When 15 diameter of conductor increases, in the SF6 gas inside casing 5,15 surface field strength of conductor is decreased；Other
Everywhere, increase therewith if suspension shielding cylinder, earth shield cylinder and casing 5 and the field strength of the outer casing inner wall of transition tank 3.In conductor
Conductive surface field strength is basicly stable when 15 diameters are up to 150~200mm, about 12.5kV/mm.P=is designed as in SF6 pressure
In the case where 0.48MPa, it is ensured that its shelf depreciation in SF6 gas, which meets, is less than disruptive field intensity, i.e. Eb=6.5 (10p)0.73
The requirement of=20.4kV/mm, as shown in Figure 7.And in the air outside casing 5, conductor diameter mainly influences intermediate and upper end
The electric field of flange, as shown in fig. 6, the maximum value of the two electric field is controlled to when conductor diameter is 150~200mm
Within 1.25kV/mm, to reduce the shelf depreciation in air to the greatest extent.Therefore, comprehensively consider conductor weight, material consumption etc. because
15 diameter design of conductor is preferably 150mm by element.
After conductor diameter determines, when conductor 15 and the growth of 5 length of casing, the field strength inside and outside casing 5 everywhere subtracts therewith
It is few, but trend is very slow, as shown in Figure 8,9.Therefore considers to mitigate weight, shortens length to reduce road transport and scene transhipment
Conductor 15 and 5 length of casing are preferably selected as 7.0m under the conditions of meeting extra-high voltage experiment safe distance by difficulty.
After determining 15 diameter of conductor and length, the suspension main shield cylinder 19 and ground connection main shield cylinder 17 inside casing 5 are long
The main electric field strength influenced at the metal flange of middle part of degree, as shown in table 1.In table 1, when earth shield cylinder is shorter, outside casing 5
Portion's field strength maximum value appears on the metal flange of middle part, and up to 2kV/mm or more has the possibility for generating corona discharge；And when reasonable
When design, when being such as grounded that main shield cylinder 17 is 1.5m long, the relatively ground connection main shield cylinder 17 of suspension main shield cylinder 19 is 1.0m long or so, middle part
Field strength is reduced to 1.0kV/mm hereinafter, comprehensively considering the length and weight of shielding cylinder at metal flange, will preferably be grounded main shield cylinder
17 length are selected as 1.5m, further according to Demand Design suitably 19 length of suspension main shield cylinder.
In the present embodiment grading ring 6 be inflatable grading ring, design as shown in Figure 1: inflatable grading ring group by upper and lower
Two inflatable grading rings and intermediate keel composition, each grading ring add the structure for being applied with conductive fabric to protect using rubber liner
Demonstrate,prove its structural strength and electric conductivity.Compared to traditional metal hard grading ring, inflatable grading ring lose heart when it is small in size,
It is light-weight, be readily transported and install, so inflation after diameter can according to reality, be designed slightly larger than the former, thus into one
Step reduces surface field strength and partial discharge quantity.Intermediate keel are by fixing the aluminium sheet of grading ring and supporting the lightweight aluminium bar of ring up and down
It constitutes, convenient for scene dismounting.
From apparent size, the main tank body 1 and 3 total length of transition tank of reactor are 4.0m, and 5 total length of casing is
Without installing inflatable grading ring when due to transport, therefore road transport can be completed using common 13.0m flat car in 7.0m,
As shown in Figure 1.Furthermore it is possible to install shaft in 1 two sides of main tank body, then with a pair of hydraulic cylinders by main tank body 1 and flat car bottom
It is connected, realizes the self-supporting lifting of reactor, further promote the efficiency of field test, increase integrated level and automation journey
Degree.
The utility model is suitable for 1000kV GIS, GIL, transformer, ± 1100kV converter power transformer and following voltage etc.
The live ac voltage withstanding and partial discharge test of the ultra-high/extra-high voltage power transmission and transforming equipment of grade, it is especially increasingly compact in design space
With the advantage of field application in ultra-high voltage transformer station, converter station, with relatively narrow valve hall, handed at following extra-high voltage scene
Have great importance in stream Insulation Test.
The utility model joined the partial pressure that partial pressure screen is tested instead of conventional high-tension in 1 bottom of SF6 reactor main tank body
Device realizes voltage measurement；The length of conductor diameter and shielding cylinder in casing length and casing also passes through optimization design；Top
Grading ring group is made of two inflatable grading rings, convenient for scene handling.The integrated reactor designed through above method has
The advantages of handling can be completed without crane cooperation in testing ground.The utility model can be placed in the flat car after repacking
On, to realize the flexible transhipment of testing ground.
Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to
It is any to belong to those skilled in the art within the technical scope disclosed by the utility model in this, the change that can be readily occurred in
Change or replace, should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should be with power
Subject to the protection scope that benefit requires.
Claims (10)
1. a kind of scene extra-high voltage SF6 exchange Insulation Test reactor, it is characterised in that: including successively arrange main tank body (1),
Transition tank (3), casing (5), grading ring (6), interior main tank body (1) includes reactance component, and transition tank (3) is set to main tank body (1)
Between casing (5), transition tank (3) is connect with casing (5) by middle part metal flange (4), and grading ring (6) and casing (5) are logical
Top metal flange (7) connection is crossed, is connect between main tank body (1) and transition tank (3) by disc insulator (2), in casing (5)
Comprising reactor high-voltage end is drawn conductor (15), improve conductor (15) Analysis of End Electric Field distribution upper grading shield (14) and
Improve the earth shield cylinder and suspension shielding cylinder of the distribution of conductor (15) surrounding electric field, main tank body (1) bottom is equipped with partial pressure screen (12).
2. the scene extra-high voltage SF6 as described in claim 1 exchanges Insulation Test reactor, it is characterised in that: disc insulator
(2) gas chamber of the gas chamber of main tank body (1) and transition tank (3), casing (5) is isolated, the gas chamber connection of transition tank (3) and casing (5)
It is logical, filled with SF6 gas as dielectric in two gas chambers.
3. the scene extra-high voltage SF6 as described in claim 1 exchanges Insulation Test reactor, it is characterised in that: conductor (15) is straight
Diameter is designed as 150mm, and conductor (15) and casing (5) Design of length are 7.0m.
4. the scene extra-high voltage SF6 as described in claim 1 exchanges Insulation Test reactor, it is characterised in that: the main tank body
(1) reactance component in includes iron core (8) and two groups of windings (9).
5. the scene extra-high voltage SF6 as claimed in claim 4 exchanges Insulation Test reactor, it is characterised in that: in main tank body (1)
Iron core (8) and winding (9) two sides be parallel at winding direction of winding and be separately installed with barricade (11)；Two windings (9)
Upper and lower ends are separately installed with grading shield (13) under winding grading ring (10) and conductor.
6. the scene extra-high voltage SF6 as described in claim 1 exchanges Insulation Test reactor, it is characterised in that: partial pressure screen (12)
It is an aluminium sheet identical with main tank body (1) bottom arc shape, is fixed by four insulation columns and main tank body (1) bottom,
Away from being designed as 1~2cm；Capacitor is formed between partial pressure screen (12) and main tank body (1).
7. the scene extra-high voltage SF6 as described in claim 1 exchanges Insulation Test reactor, it is characterised in that: earth shield cylinder
It is directly connect by metal between the metal flange of middle part, is connected between suspension shielding cylinder and earth shield cylinder by insulation column
It connects.
8. the scene extra-high voltage SF6 as described in claim 1 exchange Insulation Test reactor, it is characterised in that: grading ring (6) by
Upper and lower two inflatable grading rings and intermediate keel composition, each grading ring add the knot for being applied with conductive fabric using rubber liner
Structure.
9. the scene extra-high voltage SF6 as described in claim 1 exchange Insulation Test reactor, it is characterised in that: main tank body (1) and
Transition tank (3) total length is 4.0m.
10. the scene extra-high voltage SF6 as described in claim 1 exchanges Insulation Test reactor, it is characterised in that: casing (5) is outside
Portion is equipped with plastic umbrella skirt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822047892.7U CN209231460U (en) | 2018-12-07 | 2018-12-07 | The scene extra-high voltage SF6 exchanges Insulation Test reactor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822047892.7U CN209231460U (en) | 2018-12-07 | 2018-12-07 | The scene extra-high voltage SF6 exchanges Insulation Test reactor |
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| Publication Number | Publication Date |
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| CN209231460U true CN209231460U (en) | 2019-08-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109358278A (en) * | 2018-12-07 | 2019-02-19 | 国网湖北省电力有限公司电力科学研究院 | The scene extra-high voltage SF6 exchanges Insulation Test reactor |
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2018
- 2018-12-07 CN CN201822047892.7U patent/CN209231460U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109358278A (en) * | 2018-12-07 | 2019-02-19 | 国网湖北省电力有限公司电力科学研究院 | The scene extra-high voltage SF6 exchanges Insulation Test reactor |
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