CN206225183U - Transformer grounding resistance device - Google Patents
Transformer grounding resistance device Download PDFInfo
- Publication number
- CN206225183U CN206225183U CN201621250198.XU CN201621250198U CN206225183U CN 206225183 U CN206225183 U CN 206225183U CN 201621250198 U CN201621250198 U CN 201621250198U CN 206225183 U CN206225183 U CN 206225183U
- Authority
- CN
- China
- Prior art keywords
- transformer
- resistance device
- grounding resistance
- flexible cable
- box
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 48
- 229910052802 copper Inorganic materials 0.000 claims description 31
- 239000010949 copper Substances 0.000 claims description 31
- 239000011889 copper foil Substances 0.000 claims description 17
- 230000004888 barrier function Effects 0.000 claims description 14
- 239000011810 insulating material Substances 0.000 claims description 9
- 230000008859 change Effects 0.000 description 11
- 238000001514 detection method Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- 230000009466 transformation Effects 0.000 description 6
- 239000004020 conductor Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 206010068052 Mosaicism Diseases 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 210000003765 sex chromosome Anatomy 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 238000010200 validation analysis Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The utility model provides a kind of transformer grounding resistance device, including：Transformer (10)；Earth resistance case (20)；Flexible cable (30), the first end of flexible cable (30) is connected with transformer (10), and the second end of flexible cable (30) is connected with earth resistance case (20).Flexibility poor problem when the technical solution of the utility model efficiently solves transformer of the prior art and earth resistance connection.
Description
Technical field
The utility model is related to the technical field of transformer grounding, in particular to a kind of transformer grounding resistance dress
Put.
Background technology
As shown in figure 1, when singlephase earth fault occurs in power system, grounding transformer 1 makes power network form artificial neutrality
Point is for system earth (such as through grounding through arc), there is provided a, sense of opposite in phase close with ground connection capacity current size
Property current compensation capacity current, it is to avoid earth point electric arc generation and its caused harm.
However, some transformers there occurs that 10kV dry types ground connection becomes failure.Have to explore dry type ground connection change running status
The detection means of effect, by labs, ground connection becomes the experiment of live detection validation verification, is utilized respectively different inspections
Method carries out partial discharge detection experiment on the different parts that dry type ground connection becomes, to seek optimum detection method.
As shown in figure 1, comparing by experiment, recommendation utilizes high-frequency method, and electricity between neutral point and small resistor case is become in ground connection
Detected at the ground wire of cable.But neutral point and the ground connection of grounding transformer 1 (ground connection becomes) are used in the prior art
Resistance box 2 is attached by connecting busbar 3, and the not existing shape of malleable during connection of busbar 3, when in use spirit
Activity is poor.
Utility model content
Main purpose of the present utility model is to provide a kind of transformer grounding resistance device, of the prior art to solve
Flexibility poor problem when transformer and earth resistance are connected.
To achieve these goals, the utility model provides a kind of transformer grounding resistance device, including：Transformer；
Earth resistance case；Flexible cable, the first end of flexible cable is connected with transformer, the second end of flexible cable and earth resistance
Case is connected.
Further, flexible cable includes copper cash, interior semi-conductive layer from the center to outermost layer, insulating barrier, partly leads outward successively
Electric layer, Copper Foil and oversheath, copper cash are centrally disposed, and interior semi-conductive layer is arranged on the outer circumferential of copper cash, and insulating barrier is arranged on
The outer circumferential of interior semi-conductive layer, outer semiconducting layer is arranged on the outer circumferential of insulating barrier, and Copper Foil is arranged on outer semiconducting layer
Outer circumferential, oversheath is arranged on the outer circumferential of Copper Foil.
Further, transformer grounding resistance device also includes current transformer and lead, the first end and Copper Foil of lead
It is connected, the second end of lead passes through current transformer.
Further, transformer grounding resistance device also includes box, and box has receiving space, and current transformer is set
In box, lead is penetrated in box and is grounded from outside box.
Further, box has perforation, and lead enters in box through perforation.
Further, box is made up of insulating materials.
Further, transformer grounding resistance device also includes supporting structure, and flexible cable is arranged on supporting structure.
Further, supporting structure includes base and supporting part, and supporting part is arranged on base, and supporting part is by insulating materials
It is made, flexible cable is arranged on supporting part, base is set on the ground.
Further, supporting structure includes the axis direction identical set of multiple, multiple supporting structures and flexible cable.
Further, copper cash is multiply, a diameter of 40mm of copper cash.
Using the technical solution of the utility model, transformer is connected earth resistance case by flexible cable, because soft
Property cable shape can change, the length of flexible cable is easily realized, so change prior art using copper bar connection
Position between mode, i.e. transformer and resistance box is unrestricted, and flexible cable can change track with by transformer and resistance
Case is connected.The technical solution of the utility model efficiently solves flexible when transformer of the prior art and earth resistance connection
The poor problem of property.
Brief description of the drawings
The Figure of description for constituting the part of the application is used for providing being further understood to of the present utility model, this practicality
New schematic description and description is used to explain the utility model, does not constitute to improper restriction of the present utility model.
In the accompanying drawings：
Fig. 1 shows the annexation schematic diagram of the transformer grounding resistance device according to prior art
Fig. 2 shows and illustrated according to the annexation of the embodiment one of transformer grounding resistance device of the present utility model
Figure.
Wherein, above-mentioned accompanying drawing is marked including the following drawings：
1st, grounding transformer；2nd, earth resistance case；3rd, busbar；10th, transformer；20th, earth resistance case；30th, flexible cable.
Specific embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the utility model in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
It is noted that described further below is all exemplary, it is intended to provide further instruction to the application.Unless another
Indicate, all technologies used herein and scientific terminology are with usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
For the ease of description, space relative terms can be used herein, such as " ... on ", " ... top ",
" in ... upper surface ", " above " etc., for describing such as a device shown in the figure or feature and other devices or spy
The spatial relation levied.It should be appreciated that space relative terms are intended to comprising the orientation except device described in figure
Outside different azimuth in use or operation.If for example, the device in accompanying drawing is squeezed, be described as " in other devices
To be positioned as " under other devices or construction after the device of part or construction top " or " on other devices or construction "
Side " or " under other devices or construction ".Thus, exemplary term " ... top " can include " ... top " and
" in ... lower section " two kinds of orientation.The device can also other different modes positioning (being rotated by 90 ° or in other orientation), and
And respective explanations are made to the relative description in space used herein above.
Now, it is more fully described with reference to the accompanying drawings according to illustrative embodiments of the present utility model.However, these show
Example property implementation method can be implemented by many different forms, and should not be construed to be limited solely to reality set forth herein
Apply mode.It should be appreciated that these embodiments are provided so that disclosure of the present utility model is thoroughly and complete, and
The design of these illustrative embodiments is fully conveyed to those of ordinary skill in the art, in the accompanying drawings, for the sake of clarity,
Expand the thickness in layer and region, and make to be presented with like reference characters identical device, thus by omit to they
Description.
As shown in Fig. 2 the transformer grounding resistance device of embodiment one includes：Transformer 10, earth resistance case 20 and soft
Property cable 30.The first end of flexible cable 30 is connected with transformer 10, the second end and the earth resistance case 20 of flexible cable 30
It is connected.
The technical scheme of Application Example one, transformer 10 is connected earth resistance case 20 by flexible cable 30, because
For the shape of flexible cable 30 can change, the length of flexible cable 30 is easily realized, is so changed prior art and is used copper
The mode of connection is arranged, i.e. position between transformer 10 and resistance box is unrestricted, flexible cable 30 can change track to incite somebody to action
Transformer 10 is connected with resistance box.The technical scheme of embodiment one efficiently solves transformer of the prior art 10 and ground connection
Flexibility poor problem when resistance is connected.
As shown in Fig. 2 in the technical scheme of embodiment one, flexible cable 30 includes copper successively from the center to outermost layer
Line, interior semi-conductive layer, insulating barrier, outer semiconducting layer, Copper Foil and oversheath, copper cash are centrally disposed, and interior semi-conductive layer is arranged on
The outer circumferential of copper cash, insulating barrier is arranged on the outer circumferential of interior semi-conductive layer, and outer semiconducting layer is arranged on the circumference of insulating barrier
Outside, Copper Foil is arranged on the outer circumferential of outer semiconducting layer, and oversheath is arranged on the outer circumferential of Copper Foil.The flexibility of said structure
The one side of cable 30 connects transformer 10 and earth resistance case 20, and the internal structure of another aspect flexible cable 30 is to transformer
Path between 10 and earth resistance case 20 forms good protective effect.In addition, the flexible cable 30 of said structure possesses
The condition of the further failure for judging transformer 10 or earth resistance case 20.
As shown in Fig. 2 in the technical scheme of embodiment one, transformer grounding resistance device also include current transformer and
Lead, the first end of lead is connected with Copper Foil, and the second end of lead passes through current transformer and is grounded.Current transformer can
The voltage change of lead is detected, is so conducive to finding whether transformer 10 breaks down.Specifically, the structure of lead is centre
With copper conductor, the outer circumferential of copper conductor has insulating barrier, when the induced voltage of current transformer is larger, just illustrates transformation
Device 10 occurs in that failure.For example, explanation transformer 10 is relatively more normal when the absolute value of the signal wave of current transformer is less than 2V, when
Explanation transformer 10 goes wrong when the absolute value of the signal wave of current transformer is more than 2V, when a problem occurs, changes transformation
Device 10.Further specifically, there is manhole, lead is passed through from middle manhole in the middle of current transformer.Certainly, make
For skilled person knows, it is also possible to current transformer only is clamped into lead when lead is measured and is measured.
As shown in Fig. 2 in the technical scheme of embodiment one, transformer grounding resistance device also includes box, box tool
There is receiving space, current transformer is arranged in box, and lead is penetrated in box from outside box.Said structure is to Current Mutual Inductance
The influence of device is smaller.Specifically, box is made up of insulating materials.
As shown in Fig. 2 in the technical scheme of embodiment one, box has perforation, lead enters in box through perforation.
Said structure is easily worked, and influence to lead is smaller.
As shown in Fig. 2 in the technical scheme of embodiment one, transformer grounding resistance device also includes supporting structure, soft
Property cable 30 is arranged on supporting structure.So flexible cable 30 has supporting construction, and on the one hand said structure ensure that transformation
The safety of device ground resistance apparatus, the problems such as be less prone to electric leakage, on the other hand ensure that transformer grounding resistance device can
Systematically connected according to pre-determined route.
As shown in Fig. 2 in the technical scheme of embodiment one, supporting structure includes base and supporting part, supporting part is set
On base, supporting part is made up of insulating materials, and flexible cable 30 is arranged on supporting part, and base is set on the ground.It is above-mentioned
Structure causes that flexible cable 30 and insulating materials are in contact, and so further ensures Electrical Safety.
As shown in Fig. 2 in the technical scheme of embodiment one, copper cash is multiply, a diameter of 40mm of copper cash.Said structure
Ensure that the connection between transformer 10 and earth resistance case 20 is more effective, specifically, the diameter of copper cash can more slightly form wave
Expense causes relatively costly, and the diameter of copper cash is poor compared with can carefully cause the electric conductivity between transformer 10 and earth resistance case 20.
The difference of the transformer grounding resistance device and embodiment one of embodiment two is, supporting structure include it is multiple without
Be an entirety, for example, supporting structure is multiple hook compositions, link up with by insulating materials is made, multiple supporting structures with it is flexible
The axis direction identical set of cable 30.
The transformer grounding resistance device of embodiment two includes：Transformer 10, earth resistance case 20 and flexible cable 30.It is soft
The first end of property cable 30 is connected with transformer 10, and the second end of flexible cable 30 is connected with earth resistance case 20.
The technical scheme of Application Example two, transformer 10 is connected earth resistance case 20 by flexible cable 30, because
For the shape of flexible cable 30 can change, the length of flexible cable 30 is easily realized, is so changed prior art and is used copper
The mode of connection is arranged, i.e. position between transformer 10 and resistance box is unrestricted, flexible cable 30 can change track to incite somebody to action
Transformer 10 is connected with resistance box.The technical scheme of the present embodiment efficiently solves transformer of the prior art 10 and ground connection
Flexibility poor problem when resistance is connected.
In the technical scheme of embodiment two, flexible cable 30 includes copper cash, interior semiconductive successively from the center to outermost layer
Layer, insulating barrier, outer semiconducting layer, Copper Foil and oversheath, copper cash are centrally disposed, and interior semi-conductive layer is arranged on the week of copper cash outwards
Side, insulating barrier is arranged on the outer circumferential of interior semi-conductive layer, and outer semiconducting layer is arranged on the outer circumferential of insulating barrier, and Copper Foil is set
In the outer circumferential of outer semiconducting layer, oversheath is arranged on the outer circumferential of Copper Foil.The flexible cable 30 of said structure is on the one hand
Transformer 10 and earth resistance case 20 are connected, the internal structure of another aspect flexible cable 30 is to transformer 10 and earth resistance
Path between case 20 forms good protective effect.In addition, the flexible cable 30 of said structure possesses further judgement
The condition of the failure of transformer 10 or earth resistance case 20.
In the technical scheme of embodiment two, transformer grounding resistance device also includes current transformer and lead, lead
First end be connected with Copper Foil, the second end of lead is through current transformer and is grounded.Current transformer can detect lead
Voltage change, be so conducive to find transformer 10 whether break down.Specifically, the structure of lead is led for middle with copper
Line, the outer circumferential of copper conductor has insulating barrier, and when the induced voltage of current transformer is larger, just explanation transformer 10 occurs
Failure.It is absolute when current transformer for example, explanation transformer 10 is relatively normal when the absolute value of current transformer is less than 2V
Explanation transformer 10 goes wrong when value is more than 2V.
In the technical scheme of embodiment two, transformer grounding resistance device also includes box, and box has receiving space,
Current transformer is arranged in box, and lead is penetrated in box from outside box.Influence of the said structure to current transformer compared with
It is small.Specifically, box is made up of insulating materials.
In the technical scheme of embodiment two, box has perforation, and lead enters in box through perforation.Said structure is easy
Processing, and influence to lead is smaller.
In the technical scheme of embodiment two, transformer grounding resistance device also includes supporting structure, and flexible cable 30 sets
Put on supporting structure.So flexible cable 30 has supporting construction, and on the one hand said structure ensure that transformer grounding resistance
The safety of device, the problems such as be less prone to electric leakage, on the other hand ensure that transformer grounding resistance device can systematically by
According to pre-determined route connection.
In the technical scheme of embodiment two, copper cash is multiply, a diameter of 40mm of copper cash.Said structure ensure that transformation
Connection between device 10 and earth resistance case 20 is more effective, and specifically, the diameter of copper cash can more slightly form waste and cause cost
Higher, the diameter of copper cash is poor compared with can carefully cause the electric conductivity between transformer 10 and earth resistance case 20.
The partial discharge that ground connection becomes is detected using high-frequency detection method in this application, High Frequency Current Sensor is attached to
Ground connection can be gone out with effective detection behind position and become the 200pC discharge capacities for producing, and ground wire is carried out not influence detection after proper extension
Effect.Safely, conveniently sex chromosome mosaicism during in order to improve plus detect, we have carried out further transformation to detection method.
Original busbar is the fixed cable of single hardness, and being fixed on ground connection with " L " type becomes between neutral point and earth resistance, unfavorable
In detection, and be conducive to detection after transforming flexible cable 30 as.
After transformation in busbar connected mode, we transform the fixed busbar of original single hardness as single as shown in Figure 2
Flexible cable, and metal screen layer (Copper Foil) one end of single-core cable is grounded, down conductor can cause ground connection change and enclose
Marge, metal screen layer other end is earth-free.While personnel be ensure that with device security, greatly facilitate and detected
Journey.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
Be also intended to include plural form, additionally, it should be understood that, when in this manual use term "comprising" and/or " bag
Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
It should be noted that term " first " in specification and claims of the present utility model and above-mentioned accompanying drawing,
" second " etc. is for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that so
The data for using can be exchanged in the appropriate case, so as to embodiment example of the present utility model described herein if to remove
Order beyond those for illustrating herein or describing is implemented.Additionally, term " comprising " and " having " and theirs is any
Deformation, it is intended that covering is non-exclusive to be included, for example, containing process, method, system, the product of series of steps or unit
Product or equipment are not necessarily limited to those steps clearly listed or unit, but may include not list clearly or for this
A little processes, method, product or other intrinsic steps of equipment or unit.
Preferred embodiment of the present utility model is the foregoing is only, the utility model is not limited to, for this
For the technical staff in field, the utility model can have various modifications and variations.It is all it is of the present utility model spirit and principle
Within, any modification, equivalent substitution and improvements made etc. should be included within protection domain of the present utility model.
Claims (10)
1. a kind of transformer grounding resistance device, it is characterised in that including：
Transformer (10)；
Earth resistance case (20)；
Flexible cable (30), the first end of the flexible cable (30) is connected with the transformer (10), the flexible cable
(30) the second end is connected with the earth resistance case (20).
2. transformer grounding resistance device according to claim 1, it is characterised in that the flexible cable (30) is from center
Include copper cash, interior semi-conductive layer, insulating barrier, outer semiconducting layer, Copper Foil and oversheath successively to outermost layer, the copper cash is arranged on
Center, the interior semi-conductive layer is arranged on the outer circumferential of the copper cash, and the insulating barrier is arranged on the interior semi-conductive layer
Outer circumferential, the outer semiconducting layer is arranged on the outer circumferential of the insulating barrier, and the Copper Foil is arranged on the outer semiconductive
The outer circumferential of layer, the oversheath is arranged on the outer circumferential of the Copper Foil.
3. transformer grounding resistance device according to claim 2, it is characterised in that the transformer grounding resistance device
Also include current transformer and lead, the first end of the lead is connected with the Copper Foil, and the second end of the lead passes through
The current transformer.
4. transformer grounding resistance device according to claim 3, it is characterised in that the transformer grounding resistance device
Also include box, the box has receiving space, the current transformer is arranged in the box, the lead is from described
Penetrated outside box in the box and be grounded.
5. transformer grounding resistance device according to claim 4, it is characterised in that the box has perforation, described
Lead enters in the box through the perforation.
6. transformer grounding resistance device according to claim 4, it is characterised in that the box is by insulating materials system
Into.
7. transformer grounding resistance device according to claim 3, it is characterised in that the transformer grounding resistance device
Also include supporting structure, the flexible cable (30) is arranged on the supporting structure.
8. transformer grounding resistance device according to claim 7, it is characterised in that the supporting structure include base and
Supporting part, the supporting part is arranged on the base, and the supporting part is made up of insulating materials, and the flexible cable (30) sets
Put on the supporting part, the base is set on the ground.
9. transformer grounding resistance device according to claim 7, it is characterised in that the supporting structure includes multiple,
The axis direction identical set of the multiple supporting structure and the flexible cable (30).
10. transformer grounding resistance device according to claim 2, it is characterised in that the copper cash is multiply, the copper
A diameter of 40mm of line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621250198.XU CN206225183U (en) | 2016-11-21 | 2016-11-21 | Transformer grounding resistance device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621250198.XU CN206225183U (en) | 2016-11-21 | 2016-11-21 | Transformer grounding resistance device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206225183U true CN206225183U (en) | 2017-06-06 |
Family
ID=58790621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621250198.XU Active CN206225183U (en) | 2016-11-21 | 2016-11-21 | Transformer grounding resistance device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206225183U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111044854A (en) * | 2019-12-11 | 2020-04-21 | 国网北京市电力公司 | Partial discharge detection method and device for dry-type equipment and electronic equipment |
-
2016
- 2016-11-21 CN CN201621250198.XU patent/CN206225183U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111044854A (en) * | 2019-12-11 | 2020-04-21 | 国网北京市电力公司 | Partial discharge detection method and device for dry-type equipment and electronic equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Dong et al. | Online monitoring and diagnosis of HV cable faults by sheath system currents | |
| CN109917235B (en) | Method for detecting conductivity defect of cable buffer layer | |
| CN107064600B (en) | A kind of GIS bus voltage measurement device established in low-pressure tank body side surface | |
| CN103323751B (en) | A kind of high pressure stub cable insulation terminal local discharge test device and using method | |
| CN111157801B (en) | Method and device for detecting dielectric loss of cable, storage medium and processor | |
| CN106226650A (en) | A kind of single-core power cables protective metal shell Fault Locating Method | |
| CN105445567B (en) | The nuclear-phase method of totally enclosed type generalized information system | |
| CN205248761U (en) | Single core cable cross -bonding case | |
| CN205429680U (en) | Cable cross -bonding case | |
| WO2013126702A1 (en) | Apparatus and method for harvesting power from an overhead transmission conductor | |
| CN106526383A (en) | Lightning arrester state monitoring system and lightning arrester state monitoring method | |
| CN206225183U (en) | Transformer grounding resistance device | |
| CN108445342A (en) | A kind of cable cover(ing) single-point metallicity fault ground induced current calculating method | |
| CN207705747U (en) | A kind of cross connection grounding case with local discharge detecting function | |
| US5027099A (en) | Sensitive fault detection system for parallel coil air core reactors | |
| CN106771843A (en) | A kind of fault travelling wave ranging method of single-core power cables | |
| CN104062502B (en) | A kind of cross interconnected system phase inspection method of high-tension cable | |
| CN205141683U (en) | Shunt capacitance organizes integrated equipment | |
| KR102179618B1 (en) | Method and apparatus for diagnosing insulation degradation in transmission line | |
| CN107040286A (en) | A kind of enhanced power carrier signal sensor | |
| CN107271775A (en) | A kind of power overhead network phase shift inspection method | |
| CN106597192A (en) | Transformer grounding resistance device and method for detecting the same | |
| CN103022940B (en) | A kind of cable coupling box and on-line monitoring of cable method | |
| CN205404697U (en) | Multi -functional high voltage insulation on -line monitoring device | |
| Zhang et al. | Analysis and Treatment of the Cause of Heating of Single-core XLPE Cable GIS Terminal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |