CN106249064A - Insulation self-recovering type space charge measurement high-field electrode device - Google Patents
Insulation self-recovering type space charge measurement high-field electrode device Download PDFInfo
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- CN106249064A CN106249064A CN201610547680.8A CN201610547680A CN106249064A CN 106249064 A CN106249064 A CN 106249064A CN 201610547680 A CN201610547680 A CN 201610547680A CN 106249064 A CN106249064 A CN 106249064A
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/24—Arrangements for measuring quantities of charge
Abstract
The invention discloses a kind of insulation self-recovering type space charge measurement high-field electrode device, including: grounded metallic shield cover and top cover, the open upper end of grounded metallic shield cover, being provided with high-pressure metal electrode in grounded metallic shield cover and be filled with fluid insulation layer, tested sample is placed in grounded metallic shield cover；Top cover is removably mounted on the open end of grounded metallic shield cover, top cover is provided with HVDC conducting rod and high-voltage pulse conducting rod, HVDC conducting rod is connected with high-pressure metal electrode, being connected between high-voltage pulse conducting rod with high-pressure metal electrode and have electric capacity, high-pressure metal electrode, HVDC conducting rod and high-voltage pulse conducting rod all insulate with top cover.The high-field electrode device of the present invention, tested sample surface voltage flashover level can be improved, realize insulation breakdown self-recoverage, it is also possible to save processing, time of debugging and calibrating, and there is the advantages such as pressure performance height, compact conformation, good stability, internal temperature be uniform, with low cost.
Description
Technical field
The present invention relates to insulant technical field of performance test, more particularly, to one insulation self-recovering type space
Charge measurement high-field electrode device.
Background technology
Through the development of more than 30 years, pulse electroacoustic method space charge distribution measurement techniques has become studied insulant both at home and abroad
One of universal measurement technology of space charge characteristic.Under the conditions of this measurement technology is mainly used in DC electric field, insulant is internal empty
Between electric charge and the measurement of electric-field intensity distribution characteristic, the generation of research space charge, transport, gather and the dynamic evolution mistake such as dissipation
Journey, in conjunction with relevant physical model, can analyze the origin mechanism of insulant internal charge, Transport, and space electricity
Lotus on insulant conductance, aging, the impact of performance such as puncture.
In recent years, China carries forward vigorously research and the engineer applied of Technology of HVDC based Voltage Source Converter, but electric pressure and conveying
Power subject is in direct current cables technology, although strengthen research and development capabilities, but still becomes Main Bottleneck.The migration of space charge and long-pending
Poly-is to cause high-voltage cross-linking polythene direct current cables insulating reliability the very corn of a subject.Pulse electroacoustic method space charge distribution measurement techniques
Through development with perfect, have become as the important means of testing of direct current cables insulant under research actual operating mode.
Pulse electroacoustic method space charge measuring system is divided into plate and cable-type, and the former is mainly for sheet film sample, Hou Zhezhen
To power cable bulk sample.In the plate space charge measuring system of multiple physical field coupling, high-field electrode device is simultaneously
DC electric field, impulse electric field, temperature field and mechanical stress fields are coupled, with the space within insulant under dry run operating mode
Charge characteristic.High-field electrode device has the development trend of miniaturization, by rational Insulation Coordination so that electrode interior structure
Compact.
In correlation technique, high-field electrode device generally uses single layer dielectrics structure, utilizes insulating resin by high pressure components and parts
Pour into a mould and solidify.After solidification, insulating resin is by playing isolation voltage and fixing effect, is simultaneously run in different temperature
Field and mechanical stress after the match, enter the long service stage under electrothermal forces coupled field effect.After longtime running, insulation tree
Fat enters the rapid degradation stage, is usually expressed as the phenomenons such as built-in electrical insulation punctures.In actual high-voltage electrode assembly manufacturing process, absolutely
Unavoidably there is the defects such as micro-bubble in edge resin, will make decreasing insulating, occurs local under relatively low DC voltage
Electric discharge phenomena, puncture the most in advance.Insulating resin is combined aging and insulation defect problem for electrothermal forces and is caused
Breakdown accident helpless, can only again make, cost is high, efficiency is low, workload is big, the processing and fabricating cycle is long, and not
Easily investigate thoroughly cause of accident.It addition, nanosecond high-voltage pulse signal is extremely sensitive to circuit topological structure, new high-field electrode device
Calibration and debugging work load are big.Further, in space charge test process, usually occur that tested sample surface occurs edge flashing
Phenomenon, had a strong impact on the carrying out of test process.
Summary of the invention
It is contemplated that one of technical problem solved the most to a certain extent in correlation technique.To this end, the present invention carries
Having gone out a kind of insulation self-recovering type space charge measurement high-field electrode device, described insulation self-recovering type space charge measurement is used
High-field electrode device can improve tested sample along face voltage flashover level, it is achieved insulation breakdown self-recoverage, and can improve
Heat conductivility and pressure performance.
Insulation self-recovering type space charge measurement high-field electrode device according to embodiments of the present invention, including: ground connection gold
Belong to radome and top cover, the open upper end of described grounded metallic shield cover, in described grounded metallic shield cover, be provided with high-pressure metal
Electrode is also filled with fluid insulation layer, and tested sample is placed in described grounded metallic shield cover；Described top cover is removably pacified
Being contained in the open end of described grounded metallic shield cover, described top cover is provided with HVDC conducting rod and high-voltage pulse conducting rod,
Described HVDC conducting rod is connected with described high-pressure metal electrode, described high-voltage pulse conducting rod and described high-pressure metal electrode
Between connect have electric capacity, described high-pressure metal electrode, described HVDC conducting rod and described high-voltage pulse conducting rod all with
Described top cover insulate.
Insulation self-recovering type space charge measurement high-field electrode device according to embodiments of the present invention, can improve tested
Specimen surface voltage flashover level, it is achieved insulation breakdown self-recoverage, is convenient for changing fluid insulation layer, it is also possible to effectively save add
Work, the time debugged and calibrate, and have pressure performance height, compact conformation, good stability, internal temperature uniformly, low cost
The advantage such as honest and clean.
It addition, insulation self-recovering type space charge measurement high-field electrode device according to the above embodiment of the present invention also may be used
To have following additional technical characteristic:
According to some embodiments of the present invention, the outside of described HVDC conducting rod is provided with HVDC insulated sleeve,
So that insulation separates between HVDC conducting rod and described top cover.
According to some embodiments of the present invention, the outside of described high-voltage pulse conducting rod is provided with high-voltage pulse insulated sleeve,
So that insulation separates between high-voltage pulse conducting rod and described top cover.
According to some embodiments of the present invention, described HVDC conducting rod is connected to the top of described high-pressure metal electrode
End, described high-voltage pulse conducting rod is connected to the side of described high-pressure metal electrode by described electric capacity.
According to some embodiments of the present invention, described insulation self-recovering type space charge measurement high-field electrode device also wraps
Including: semi-conductive layer, described semi-conductive layer is located at the lower end of described high-pressure metal electrode and pastes with described high-pressure metal electrode seal
Closing, described tested sample is pressed between described grounded metallic shield cover and described semi-conductive layer.
According to some embodiments of the present invention, it is connected between described top cover with described high-pressure metal electrode and has resistance.
According to some embodiments of the present invention, described ground shield includes: for placing the ground connection of described tested sample
Metallic plate；Grounded metal annulus, described grounded metal annulus is located on described grounding plate and upwardly extends.
Alternatively, described grounding plate is connected by threaded fastener with described grounded metal annulus.
Alternatively, described metallic shield also includes: sealing ring, and described sealing ring is located at described grounding plate and described
Between grounded metal annulus.
Alternatively, described top cover is connected with metal ring described in ground connection by threaded fastener.
The additional aspect of the present invention and advantage will part be given in the following description, and part will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Accompanying drawing explanation
Fig. 1 is that the structure of insulation self-recovering type space charge measurement high-field electrode device according to embodiments of the present invention is shown
It is intended to.
Reference:
100: high-field electrode device；
1: top cover；110: grounded metallic shield cover；2: HVDC insulated sleeve；3: HVDC conducting rod；4: high pressure
Metal electrode；5: semi-conductive layer；6: tested sample；7: resistance；8: high-voltage pulse insulated sleeve；9: high-voltage pulse conducting rod；10:
Electric capacity；11: grounded metal annulus；12: grounding plate；13: screwed hole；14: fluid insulation layer；15: sealing ring.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings.Below with reference to
The embodiment that accompanying drawing describes is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
In describing the invention, it is to be understood that term " " center ", " on ", D score, " vertically ", " level ",
" push up ", " end ", " interior ", " outward ", etc. instruction orientation or position relationship be based on orientation shown in the drawings or position relationship, be only
Specific side must be had for the ease of describing the present invention and simplification description rather than instruction or the device of hint indication or element
Position, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
In the present invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " fixing " etc.
Term should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be that machinery connects
Connect, it is also possible to be electrical connection or each other can communication；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, permissible
It is connection or the interaction relationship of two elements of two element internals, unless otherwise clear and definite restriction.For this area
For those of ordinary skill, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
Describe insulation self-recovering type space charge measurement high pressure according to embodiments of the present invention below in conjunction with the accompanying drawings in detail
Electrode assembly 100.Wherein, above-below direction normally uses with insulation self-recovering type space charge measurement high-field electrode device 100
Time above-below direction be as the criterion.
As it is shown in figure 1, insulation self-recovering type space charge measurement high-field electrode device 100 according to embodiments of the present invention
May include that grounded metallic shield cover 110 and top cover 1.
Specifically, as it is shown in figure 1, the upper end of grounded metallic shield cover 110 can be opened wide, grounded metallic shield cover 110
In can be provided with high-pressure metal electrode 4, and fluid insulation layer 14, tested sample 6 can be filled with in grounded metallic shield cover 110
Can be placed in grounded metallic shield cover 110, to realize follow-up measurement work.
Top cover 1 is removably mounted on the open end of grounded metallic shield cover 110, as it is shown in figure 1, can set on top cover 1
Having HVDC conducting rod 3 and high-voltage pulse conducting rod 9, high-voltage pulse conducting rod 9 is connected with high-pressure metal electrode 4, high-tension pulse
Rushing to be connected between conducting rod 9 with high-pressure metal electrode 4 and have electric capacity 10, high direct voltage can be incorporated into by HVDC conducting rod 3
On high-pressure metal electrode 4, high-voltage pulse can be incorporated on high-pressure metal electrode 4 by high-voltage pulse conducting rod 9, the work of electric capacity 10
With being isolated DC voltage, introducing pulse voltage.High-pressure metal electrode 4, HVDC conducting rod 3 and high-voltage pulse conducting rod
9 all insulate with top cover 1, to ensure that measuring work can be normally carried out.
Thus, after top cover 1 is pulled down from grounded metallic shield cover 110, it is possible to by circuit components and fluid insulation layer
14 separate, and main circuit structure is constant, it is simple to regularly replace fluid insulation layer 14, high-field electrode device 100 internal
Denier punctures, and can realize dielectric self-recoverage by modes such as blood pressure lowerings, such that it is able to realize insulation breakdown self-recoverage, enters
And processing, the time debugged and calibrate can be saved.
Further, liquid insulating barrier 14 replacement air dielectric is filled, even if tested sample 6 size is less, it is possible to
Possessing enough along face voltage flashover level, Stability Analysis of Structures, pressure performance is high.Meanwhile, the heat conductivility of fluid insulation layer 14 is excellent
Different, compared to the insulating resin in correlation technique, it is possible not only to improve heat conductivility, and beneficially internal temperature is uniform
Change.
Insulation self-recovering type space charge measurement high-field electrode device 100 according to embodiments of the present invention, by pushing up
Lid 1 is removably mounted on the open end of grounded metallic shield cover 110, arranges HVDC conducting rod 3 and high pressure on top cover 1
Pulse conducting rod 9, and in grounded metallic shield cover 110, fill liquid insulating barrier 14, tested sample 6 can be carried out space electricity
The test of lotus, good heat conductivity, homogeneous temperature.Further, once puncture, it is possible to achieve the self-recoverage of dielectric.Meanwhile,
During changing fluid insulation layer 14, high-field electrode device 100 main circuit structure is constant, such that it is able to cost-effective,
Shorten debugging cycle and high-field electrode device 100 test performance can be ensured.
According to some embodiments of the present invention, as it is shown in figure 1, grounded metallic shield cover 110 may include that for placing not
The grounding plate 12 of test specimens and grounded metal annulus 11, grounded metal annulus 11 can be located on grounding plate 12 and to
Upper extension, thus grounding plate 12 and grounded metal annulus 11 can collectively form grounded metallic shield cover 110, grounded metal
Liquid insulating barrier 14 can be filled and the parts such as high-pressure metal electrode 4 are installed in radome 110.
The effect of grounded metallic shield cover 110 has two aspects, and one is the interference signal of barrier external environment, and two is ground connection
Protect to improve the safety of test.Specifically, grounding plate 12 as the fixed component of grounded metallic shield cover 110,
Being positioned at the bottom of whole device, its another important function is to place tested sample 6, grounded metallic shield cover as ground electrode
The elements such as high-pressure metal electrode 4, insulated sleeve and high-voltage capacitance 10 within 110 and tested sample 6 are all immersed in liquid
In insulating barrier 14, to eliminate the air gap impact on sonic propagation, it is effectively improved tested sample 6 dielectric surface flashover level and can realize simultaneously
Self-recovering function after insulation breakdown.
Alternatively, grounding plate 12 can be connected by threaded fastener with grounded metal annulus 11, simple in construction, even
Connect reliable, and extraneous interference can be reduced with the miniaturization feature of holding means entirety.
In order to avoid the seepage of fluid insulation layer 14 in grounded metallic shield cover 110, metallic shield 110 can also wrap
Include: sealing ring 15.As it is shown in figure 1, sealing ring 15 can be located between grounding plate 12 and grounded metal annulus 11.Favorably
Ground, the lower surface of grounded metal annulus 11 can dig toroidal cavity, grounded metal annulus 11 and grounding plate 12 it
Between pad set sealing ring 15, and the most fixing, to form grounded metallic shield cover 110, such that it is able to have by threaded fastener
Effect prevents fluid insulation layer 14 seepage, improves safety and stability further.
In certain embodiments, top cover 1 can be connected with grounded metal annulus 11 by threaded fastener.Such as, such as
In example shown in Fig. 1, top cover 1 can offer screwed hole 13, threaded fastener can pass over screwed hole from top cover 1
13 are connected with grounded metal annulus 11, to guarantee that in test process top cover 1 keeps the zero potential of ground connection.Thus, simple in construction,
Easy accessibility, such that it is able to improve debugging and change the efficiency of fluid insulation layer 14, reduces cost.
Alternatively, fluid insulation layer 14 can be the insulating oils such as transformer oil, silicone oil, vegetable oil.Insulating oil be possible to prevent because of
The surface voltage flashover that tested sample 6 surface insulation liquid medium runs off and causes, can realize the self-recoverage of insulation breakdown simultaneously
Function, and improve the heat conductivility of high-field electrode device 100, the measurement result making space charge to tested sample 6 is the most steady
Fixed.
According to some embodiments of the present invention, as it is shown in figure 1, the outside of HVDC conducting rod 3 can be provided with high straightening
Stream insulated sleeve 2, so that insulation separates, by the height within HVDC insulated sleeve 2 between HVDC conducting rod 3 and top cover 1
Straightening conductance electric pole 3 and top cover 1 and grounded metallic shield cover 110 mutual insulating, reduce extraneous interference.
In certain embodiments, as it is shown in figure 1, the outside of high-voltage pulse conducting rod 9 can be provided with high-voltage pulse insulation sleeve
Pipe 8, so that insulation separates between high-voltage pulse conducting rod 9 and top cover 1, it is achieved exhausted between high-voltage pulse conducting rod 9 and top cover 1
Edge, reduces extraneous interference further, improves stability and the accuracy of test job.
As it is shown in figure 1, HVDC conducting rod 3 can be connected to the top of high-pressure metal electrode 4, high-voltage pulse conducting rod
9 can be connected to the side of high-pressure metal electrode 4 by electric capacity 10.Thus, simple and compact for structure, and easy accessibility, it is simple to
Carry out debugging and change fluid insulation layer 14.
Alternatively, HVDC insulated sleeve 2 can be located at the central authorities of top cover 1, and HVDC insulated sleeve 2 can lead to
Cross threaded fastener to fix with top cover 1.Such as, top cover 1 can be offered screwed hole 13, threaded fastener is from the top of top cover 1
Can be connected with HVDC insulated sleeve 2 after screwed hole, top cover 1 is connected with HVDC insulated sleeve 2.On the one hand,
It is convenient for changing fluid insulation layer 14, on the other hand, can be that tested sample 6 provides mechanical stress fields.
According to some embodiments of the present invention, insulation self-recovering type space charge measurement high-field electrode device 100 also may be used
To include: semi-conductive layer 5.As it is shown in figure 1, semi-conductive layer 5 can be located at the lower end of high-pressure metal electrode 4, and semi-conductive layer 5
Can fit tightly with high-pressure metal electrode 4, tested sample 6 can be pressed in grounded metallic shield cover 110 and semi-conductive layer 5 it
Between.It is to say, the upper end of high-pressure metal electrode 4 is connected with HVDC conducting rod 3, the lower end of high-pressure metal electrode 4 and half
Conductive layer 5 contacts.Semi-conductive layer 5 can reduce the sound wave reflection at tested sample 6 upper surface, and can simulate power cable
Semi-conductive layer 5 structure in interior insulation, improves the accuracy of test further.
In certain embodiments, there is resistance 7 as it is shown in figure 1, can be connected between top cover 1 with high-voltage pulse conducting rod 9, i.e.
The two ends of resistance 7 are connected with top cover 1 and high-voltage pulse conducting rod 9 respectively, and the effect of resistance 7 is that high-voltage pulse is carried out impedance
Join, to reduce the reflecting component of high-voltage pulse signal, and focus on through expanding and surface electric field intensity, it is to avoid generation office during measurement
Discharging in portion, reduces and concentrate due to electric field and cause liquid perturbation.
Insulation self-recovering type space charge measurement high-tension electricity according to embodiments of the present invention is described in detail below in conjunction with Fig. 1
The operation principle of pole device 100 and work process.
With high-field electrode device 100 operationally, fluid insulation layer 14 can disappear insulation self-recovering type space charge measurement
Except the air gap between tested sample 6 and semi-conductive layer 5, grounding plate 12, to improve the effect of sound wave coupling.By tested sample
6 place on grounding plate 12, then install high-field electrode device 100 and make it fix and keep high-pressure metal electrode 4 by half
Conductive layer 5 compresses with tested sample 6 surface.At the grounded metal screen that grounded metal annulus 11 is connected with grounding plate 12
Cover filling liquid insulating barrier 14 in cover 110, tested sample 6 surface voltage flashover level, high-field electrode simultaneously can be effectively improved
The internal insulation self-recoverage once occurring insulation breakdown can realize liquid medium of device 100.
After completing the installation of each parts, apply required by HVDC conducting rod 3 and high-voltage pulse conducting rod 9 respectively
High-voltage dc voltage and high-voltage pulse, the two is superimposed upon in tested sample 6 simultaneously, it is possible to carry out the survey of space charge
Examination.
When fluid insulation layer 14 changed by needs, top cover 1 is opened, then by HVDC insulated sleeve 2, high-voltage pulse
Insulated sleeve 8 and internal circuit configuration together take out with top cover 1, are carried out with grounded metallic shield cover 110 by fluid insulation layer 14
Separate, fill new fluid insulation layer 14, the replacing to fluid insulation layer 14 can be completed.
Therefore, insulation self-recovering type space charge measurement high-field electrode device 100 according to embodiments of the present invention, it is achieved
High-field electrode device 100 insulate self-healing function, has the measurement function of solid sample, solid-liquid composite sample concurrently.By filling out
Topping up body insulating barrier 14, as dielectric, can be effectively improved tested sample 6 surface voltage flashover level.
Meanwhile, not in use by insulating resin high pressure components and parts poured into a mould and solidify, utilizing the exhausted of fluid insulation layer 14
Originating from recovery feature, need not again make high-field electrode device 100 after insulation breakdown, internal primary structure is constant, effectively saves
About debugging time.
At structure design aspect, access high direct voltage and pulse signal from top, by capacitance resistance ware by high voltage direct current
Pressure and high-voltage pulse are coupled, and define the rock-steady structure of direct current voltage pulse signal capacitance resistance ware integral type.
In sum, insulation self-recovering type space charge measurement high-field electrode device 100 according to embodiments of the present invention,
Tested sample 6 surface voltage flashover level can be improved, it is achieved insulation breakdown self-recoverage, especially adapt to high pressure, solid-liquid mixing
Testing requirement Deng New function, it is also possible to effectively save processing, the time debugged and calibrate.And there is compact conformation, stablize
Property is good, internal temperature is uniform, the advantage such as with low cost.
In the description of this specification, reference term " embodiment ", " specific embodiment ", " example " or " concrete example " etc.
Description means to combine this embodiment or example describes specific features, structure, material or feature be contained in the present invention extremely
In a few embodiment or example.In this manual, the schematic representation of above-mentioned term is necessarily directed to identical
Embodiment or example.And, the specific features of description, structure, material or feature can with one or more embodiments in office or
Example combines in an appropriate manner.Additionally, in the case of the most conflicting, those skilled in the art can be by this explanation
Different embodiments or the feature of example and different embodiment or example described in book are combined and combine.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is example
Property, it is impossible to being interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, revises, replaces and modification.
Claims (10)
1. an insulation self-recovering type space charge measurement high-field electrode device, it is characterised in that: including:
Grounded metallic shield cover, the open upper end of described grounded metallic shield cover, it is provided with high pressure in described grounded metallic shield cover
Metal electrode is also filled with fluid insulation layer, and tested sample is placed in described grounded metallic shield cover；
Top cover, described top cover is removably mounted on the open end of described grounded metallic shield cover, and described top cover is provided with high pressure
Conductive media bar and high-voltage pulse conducting rod, described HVDC conducting rod is connected with described high-pressure metal electrode, described high pressure
Being connected between pulse conducting rod with described high-pressure metal electrode and have electric capacity, described high-pressure metal electrode, described HVDC conduct electricity
Bar and described high-voltage pulse conducting rod all insulate with described top cover.
Insulation self-recovering type space charge measurement high-field electrode device the most according to claim 1, it is characterised in that institute
The outside stating HVDC conducting rod is provided with HVDC insulated sleeve, so that insulating between HVDC conducting rod and described top cover
Separate.
Insulation self-recovering type space charge measurement high-field electrode device the most according to claim 1, it is characterised in that institute
The outside stating high-voltage pulse conducting rod is provided with high-voltage pulse insulated sleeve, so that insulating between high-voltage pulse conducting rod and described top cover
Separate.
Insulation self-recovering type space charge measurement high-field electrode device the most according to claim 1, it is characterised in that institute
Stating HVDC conducting rod and be connected to the top of described high-pressure metal electrode, described high-voltage pulse conducting rod is by described electric capacity even
It is connected on the side of described high-pressure metal electrode.
Insulation self-recovering type space charge measurement high-field electrode device the most according to claim 1, it is characterised in that also
Including:
Semi-conductive layer, described semi-conductive layer is located at the lower end of described high-pressure metal electrode and pastes with described high-pressure metal electrode seal
Closing, described tested sample is pressed between described grounded metallic shield cover and described semi-conductive layer.
Insulation self-recovering type space charge measurement high-field electrode device the most according to claim 1, it is characterised in that institute
State to be connected between top cover with described high-voltage pulse conducting rod and have resistance.
Insulation self-recovering type space charge measurement high-field electrode device the most according to claim 1, it is characterised in that institute
State grounded metallic shield cover to include:
For placing the grounding plate of described tested sample；
Grounded metal annulus, described grounded metal annulus is located on described grounding plate and upwardly extends.
Insulation self-recovering type space charge measurement high-field electrode device the most according to claim 7, it is characterised in that institute
State grounding plate to be connected by threaded fastener with described grounded metal annulus.
Insulation self-recovering type space charge measurement high-field electrode device the most according to claim 7, it is characterised in that institute
State grounded metallic shield cover also to include:
Sealing ring, described sealing ring is located between described grounding plate and described grounded metal annulus.
Insulation self-recovering type space charge measurement high-field electrode device the most according to claim 7, it is characterised in that
Described top cover is connected with described metal ring by threaded fastener.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610547680.8A CN106249064B (en) | 2016-07-12 | 2016-07-12 | Insulate self-recovering type space charge measurement high-field electrode device |
Applications Claiming Priority (1)
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