CN107256761A - 500kV standard potential transformers - Google Patents
500kV standard potential transformers Download PDFInfo
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- CN107256761A CN107256761A CN201710641649.5A CN201710641649A CN107256761A CN 107256761 A CN107256761 A CN 107256761A CN 201710641649 A CN201710641649 A CN 201710641649A CN 107256761 A CN107256761 A CN 107256761A
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- Prior art keywords
- housing
- base
- standard potential
- line bag
- potential transformers
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- 238000012545 processing Methods 0.000 claims abstract description 21
- 239000000523 sample Substances 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 11
- 238000002955 isolation Methods 0.000 claims abstract description 7
- 238000004804 winding Methods 0.000 claims description 20
- 238000009434 installation Methods 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 229910018503 SF6 Inorganic materials 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 5
- 239000003822 epoxy resin Substances 0.000 claims description 5
- 229920000647 polyepoxide Polymers 0.000 claims description 5
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 claims description 5
- 229960000909 sulfur hexafluoride Drugs 0.000 claims description 5
- 239000010410 layer Substances 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000011889 copper foil Substances 0.000 claims description 3
- 239000011229 interlayer Substances 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 claims description 2
- QGHDLJAZIIFENW-UHFFFAOYSA-N 4-[1,1,1,3,3,3-hexafluoro-2-(4-hydroxy-3-prop-2-enylphenyl)propan-2-yl]-2-prop-2-enylphenol Chemical group C1=C(CC=C)C(O)=CC=C1C(C(F)(F)F)(C(F)(F)F)C1=CC=C(O)C(CC=C)=C1 QGHDLJAZIIFENW-UHFFFAOYSA-N 0.000 claims 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims 1
- 239000005864 Sulphur Substances 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000009422 external insulation Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 208000033999 Device damage Diseases 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/02—Casings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/24—Voltage transformers
- H01F38/26—Constructions
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
- H01F2027/406—Temperature sensor or protection
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention discloses a kind of 500kV standard potential transformers, including housing, line bag, Temperature Humidity Sensor, conducting rod, top cover and base, one end of housing vertical direction is connected with base, and the other end of housing vertical direction is connected with top cover, and housing is set to isolation material；One end in the housing of base sets line bag；Temperature Humidity Sensor includes temperature and humidity sensing and popped one's head in and data processing module, and temperature and humidity sensing probe is arranged on the inside of base, and data processing module is arranged at chassis outer side；Top cover is provided with adpting flange, and one end of conducting rod is connected with line bag, and the other end of conducting rod is connected with adpting flange.In the present invention, housing doubles as outlet casing tube, so as to reduce the whole height of 500kV standard potential transformers；Temperature Humidity Sensor is set, and humiture that can in real time in monitoring standard voltage transformer housing contributes to the degree of accuracy of increase error checking.
Description
Technical field
Calibrated for error equipment, more particularly to a kind of 500kV normal voltages mutual inductance the present invention relates to EHV Potential Transformer
Device.
Background technology
The voltage class of power transmission electric network includes 6kV, 10kV, 35kV, 110kV, 220kV, 330kV, 500kV and 1000kV,
Wherein, 500kV EHV transmissions power network is the main power transmission electric network of China.In 500kV EHV transmission power networks, large-scale generating
The transmission voltage stood is generally 550kV, 535kV and 525kV, in order to which different super-pressure to be transformed to be available for measuring instrumentss and relay
The low-voltage that protection device is used, needs peace between the transmission line of electricity and measuring instrumentss and protective relaying device of power large-scale electric generating station
Voltage transformer is filled, and according to the difference of voltage transformer output accuracy, the no-load voltage ratio of the voltage transformer voltage of transformation of installation
Also it is different.
In order to ensure the accuracy of voltage transformer energy metering, voltage transformer before dispatching from the factory, in use and is being repaired
After be required to carry out error checking.When carrying out error checking to voltage transformer at the scene, the normal voltage of nucleus equipment is used as
Transformer is typically all that other places are transported, and not only weight and volume is larger for traditional 500kV standard potential transformers, and
Its height is all higher than 3 meters mostly, and the height of height of car plus standard potential transformer has exceeded road friendship when equipment is uprightly transported
The limit for height height of logical transport, so traditional standard potential transformer is transported using lateral recumbent posture, but increases equipment in fortune
The possibility damaged is caused during defeated.
In addition, according to JJG314-2010《Measurement voltage transformer》Provided in vertification regulation, standard potential transformer
Working environment should be：Environment temperature is 10 DEG C~35 DEG C, and relative humidity is not more than 80%.When working environment is unsatisfactory for vertification regulation
During regulation, the error accuracy of standard potential transformer will be unable to be protected, and may influence mutual inductor on site verifying work
Accuracy.The part for influenceing the error information of standard potential transformer is line bag, therefore should be to standard potential transformer line bag
Working environment be monitored, standard potential transformer is divided into oil immersed type, dry type and inflatable, oil immersed type standard potential transformer
Line bag, which is installed in housing, to be soaked in oil, and dry type standard potential transformer is installed in housing and poured by insulating materials, is inflated
Formula standard potential transformer is installed in closed air chamber, not mutual to normal voltage at present when carrying out transformer error verification
Sensor line bag carries out temperature and humidity monitor, only to being monitored outside standard potential transformer, and outside standard potential transformer
The humiture that humiture is wrapped with housing interior lines has larger difference.Therefore can not criterion voltage transformer working environment
Whether regulatory requirements are met, the accuracy of transducer check data will be influenceed.
The content of the invention
The invention provides a kind of 500kV standard potential transformers, to solve because traditional 500kV standard potential transformers are high
Spend the problem of height causes transport inconvenience and non-monitoring standard voltage transformer working environment and influences verification accuracy.
A kind of 500kV standard potential transformers that the present invention is provided, including：Housing, line bag, Temperature Humidity Sensor, conduction
Bar, top cover and base, wherein,
One end of the housing vertical direction is connected with the base, the other end of the housing vertical direction with it is described
Top cover is connected, and the height of the housing is 1700-1900mm, and the height of the base is 250-450mm, and the housing is set
For isolation material；
One end in the housing of the base sets the line bag, and the line bag includes R shaped iron cores, coiling bone
Frame, primary winding and secondary coil；
The bobbin is set on the R shaped iron cores, and the secondary coil is wound on the bobbin, described
Primary winding is around on the secondary coil；
The Temperature Humidity Sensor includes temperature and humidity sensing and popped one's head in and data processing module, temperature and humidity sensing probe with
The data processing module electrical connection, the temperature and humidity sensing probe is arranged on the inside of the base, the data processing module
It is arranged at the chassis outer side；
The top cover is provided with adpting flange, and one end of the conducting rod is connected with the line bag, the conducting rod
The other end is connected with the adpting flange.
According to one embodiment of present invention, the height of the housing is 1800mm, and the height of the base is 350mm.
According to one embodiment of present invention, the housing and top cover are set to epoxy resin material.
According to one embodiment of present invention, last circle of the primary winding is used with described last layer of line bag etc.
Wide copper foil coiling.
According to one embodiment of present invention, the interlayer of the primary winding and secondary coil be provided with multi-layered polyester every
Film.
According to one embodiment of present invention, the line bag also includes barricade, radome and voltage equalizing ball, wherein,
The barricade is set to round rectangle, and barricade described in polylith is symmetrical and is vertically arranged at the side of the line bag
Face；
The radome is set to annular, the concentric surface for being arranged at the primary winding of the radome；
The voltage equalizing ball is arranged at the outlet port of the primary winding.
According to one embodiment of present invention, the data processing module is provided with standard digital output display screen and data
Long-range delivery port in real time.
According to one embodiment of present invention, the base is provided with the first installation port, the second installation port and inflation
Valve installs port, and the chassis outer side is provided with secondary connection plate, wherein,
The secondary coil is electrically connected by the described first installation port with the secondary connection plate；
The temperature and humidity sensing probe is electrically connected by the described second installation port with the data processing module.
According to one embodiment of present invention, the shell is filled with sulfur hexafluoride gas, the sulfur hexafluoride gas
Pressure value is set to 0.45Mpa.
A kind of 500kV standard potential transformers that the present invention is provided can include the following benefits：In the present invention, housing
As outlet casing tube, and the height of housing is reduced, so as to reduce the whole height of 500kV standard potential transformers；Housing is set
Isolation material is set to, on the premise of proof strength, is effectively solved because the height of simple reduction housing makes standard potential transformer
External insulation and interior insulation performance the problem of reduce, meanwhile, can also reduce the overall weight and volume of standard potential transformer；
Temperature Humidity Sensor is set, and Temperature Humidity Sensor includes temperature and humidity sensing and popped one's head in and data processing module, temperature and humidity sensing probe
It is arranged on the inside of base, humiture that can in real time in monitoring standard voltage transformer housing contributes to the standard of increase error checking
Exactness.
Brief description of the drawings
In order to illustrate more clearly of technical scheme, letter will be made to the required accompanying drawing used in embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, on the premise of not paying creative work, also
Other accompanying drawings can be obtained according to these accompanying drawings.
Fig. 1 is a kind of structural representation of 500kV standard potential transformers provided in an embodiment of the present invention；
Fig. 2 is the structural representation of housing provided in an embodiment of the present invention；
Fig. 3 is the structural representation of line bag provided in an embodiment of the present invention；
Fig. 4 is the structural representation of Temperature Humidity Sensor provided in an embodiment of the present invention；
Fig. 5 is the structural representation of adpting flange provided in an embodiment of the present invention；
Fig. 6 is the structural representation of top cover provided in an embodiment of the present invention；
Fig. 7 is the structural representation of base provided in an embodiment of the present invention.
Fig. 1 is into Fig. 7, and symbol is represented：
1- housings, 2- line bags, 201-R shaped iron cores, 202- bobbins, 203- primary windings, 204- secondary coils, 205-
Barricade, 206- radomes, 207- voltage equalizing balls, 3- Temperature Humidity Sensors, 301- temperature and humidity sensings probe, 302- data processing moulds
Block, 4- conducting rods, 5- adpting flanges, 6- top covers, 7- bases, 701- first installs port, and 702- second installs port, and 703- fills
Air valve installs port.
Embodiment
It is a kind of structural representation of 500kV standard potential transformers provided in an embodiment of the present invention referring to Fig. 1, including：
Housing 1, line bag 2, conducting rod 4, top cover 6 and base 7, wherein,
One end of the vertical direction of housing 1 is connected with base 7, and the other end of the vertical direction of housing 1 is connected with top cover 6,
The height of housing 1 is 1700-1900mm, and the height of base 7 is 250-450mm, and housing 1 is set to isolation material.Compared to biography
The structure of the system additional sleeve pipe of 500kV standard potential transformer housings, the embodiment of the present invention doubles as the structure of sleeve pipe using housing 1,
Housing 1 is set to cylindrical shape, according to the difference of isolation material, highly may be configured as 1700-1900mm, housing of the embodiment of the present invention
1 is made of epoxy resin material, maximum electricity of the maximum voltage creep distance compared to traditional metal shell of epoxy resin material
Press creep distance big, therefore, the height of housing 1 can be set to 1800mm, the height of base 7 is set to 350mm, then whole height is
2150mm, the general high 1.1m of goods vehicle, after the upright entrucking of 500kV standard potential transformers provided in an embodiment of the present invention, car
Be no more than 4m with the whole height of equipment, less than the limit for height height of Road Transportation, without lateral recumbent posture transport, can avoid because
Lateral recumbent posture is transported and causes device damage.In addition, the housing 1 and base 7 of the embodiment of the present invention are made of epoxy resin, no
The whole height of 500kV standard potential transformers can only be reduced, additionally it is possible to mitigate the overall weight of 500kV standard potential transformers
Amount.
It is the structural representation of housing provided in an embodiment of the present invention referring to Fig. 2, the top and bottom of housing 1 are set respectively
Fixing hole is equipped with, for installing top cover 6 and base 7, top cover 6, housing 1 and base 7 constitute confined space.
It is the structural representation of base provided in an embodiment of the present invention referring to Fig. 7, base 7 is provided with the first installation port
701st, second port 702 and charge valve installation port 703 are installed, the outside of base 7 is additionally provided with secondary connection plate and (do not drawn in figure
Go out), sulfur hexafluoride gas is filled into housing 1 by charge valve installation port 703 and is used as dielectric, the pressure of sulfur hexafluoride gas
Force value is set to 0.45MPa.
It is the structural representation of line bag provided in an embodiment of the present invention referring to Fig. 3, one end in the housing 1 of base 7
Line bag 2 is set, and line bag 2 includes R shaped iron cores 201, bobbin 202, primary winding 203 and secondary coil 204, bobbin
202 are set on R shaped iron cores 201, and secondary coil 204 is wound on bobbin 202, and primary winding 203 is around the home in secondary line
On circle, last circle and the wide copper foil coiling of last layer of line bag of primary winding 203, with electrical shielding and fastening line bag 2
Effect.Line bag 2 is overall to turn to round pie, and this structure causes line bag 2 more to stablize, compared to traditional rectangular lines bag,
The volume of line bag 2 provided in an embodiment of the present invention is smaller.Primary winding 203 is in pass step by step from the centre of secondary coil 204 to both sides
What is subtracted is stepped, and this multistage ladder-type structure causes line bag 2 more to stablize, and compared to traditional rectangular lines bag, the present invention is real
The volume of line bag 2 for applying example offer is smaller, and the leakage reactance of primary winding 203 can be reduced under conditions of insulation distance is ensured.Primary line
The interlayer of circle 203 and secondary coil 204 is provided with multi-layered polyester barrier film, with layer insulation and fixed effect, secondary line
Circle 204 is provided with multiple taps, is electrically connected by the first installation port 701 with secondary connection plate, can cover 500kV transformer stations electricity
All no-load voltage ratios of transformer are pressed, and the accuracy class of each no-load voltage ratio can reach 0.02 grade.
In addition, line bag 2 also includes barricade 205, radome 206 and voltage equalizing ball 207, barricade 205 is set to fillet square
Shape, and surface is smooth, no wedge angle, barricade 205 is provided with polylith, and polylith barricade 205 is symmetrical and is vertically arranged at line bag top
The side in portion, the effect with electrical shielding.Radome 206 is set to annular, and radome 206 is concentric to be arranged at primary winding
203 surface, it may have the effect of electrical shielding and fastening line bag.Voltage equalizing ball 207 is arranged at the outlet port of primary winding 203
Place.Barricade 205, radome 206 and voltage equalizing ball 207 can the further surface of uniform line bag 2, both sides and outlet port electricity
, and then the insulating properties of increase line bag 2.
Participate in Fig. 5 and Fig. 6, the structural representation of adpting flange and top cover respectively provided in an embodiment of the present invention, top cover 6
Adpting flange 5 is provided with, adpting flange 5 is set to stainless steel, and one end of conducting rod 3 is connected with the top of line bag 2, separately
One end is connected with adpting flange 5.
It is the structural representation of Temperature Humidity Sensor provided in an embodiment of the present invention referring to Fig. 4, Temperature Humidity Sensor 3 is wrapped
Temperature and humidity sensing probe 301 and data processing module 302 are included, temperature and humidity sensing probe 301 is electrically connected with data processing module 302
Connect, temperature and humidity sensing probe 301 is arranged at the inner side of base 7, the lower section of line bag 2, data processing module 302 is arranged at outside base 7
Side, temperature and humidity sensing probe 301 is electrically connected by the second installation port 702 with data processing module 302.
Data processing module 302 can be powered using battery, and set integrated in power switch, data processing module 302
There is humiture abnormity early warning system, in addition, standard digital output display screen and the real-time delivery port of remote data are additionally provided with, when
When humiture inside standard potential transformer exceedes preset value, humiture abnormity early warning system generation warning message simultaneously passes through mark
Quasi- numeral output display screen display alarm information, while being transmitted warning message to terminal by the real-time delivery port of remote data
Equipment.
In summary, 500kV standard potential transformers housing 1 provided in an embodiment of the present invention doubles as outlet casing tube, and drops
The height of low housing 1, so as to reduce the whole height of 500kV standard potential transformers；Housing 1 is set to isolation material,
On the premise of proof strength, effectively solve because the height of simple reduction housing 1 makes the external insulation of standard potential transformer and interior exhausted
The problem of edge performance is reduced, meanwhile, it can also reduce the overall weight and volume of standard potential transformer；Temperature and humidity sensing is set
Device 3, Temperature Humidity Sensor 3 includes temperature and humidity sensing probe 301 and data processing module 302, and temperature and humidity sensing probe 301 is set
In the inner side of base 7, humiture that can in real time in monitoring standard voltage transformer housing 1 contributes to the accurate of increase error checking
Degree.
It should be noted that herein, the relational terms of such as " first " and " second " or the like are used merely to one
Individual entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operate it
Between there is any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Cover including for nonexcludability, so that process, method, article or equipment including a series of key elements not only include those
Key element, but also other key elements including being not expressly set out, or also include for this process, method, article or set
Standby intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Also there is other identical element in the process including the key element, method, article or equipment.
Invention described above embodiment is not intended to limit the scope of the present invention..
Claims (9)
1. a kind of 500kV standard potential transformers, it is characterised in that including：Housing (1), line bag (2), Temperature Humidity Sensor
(3), conducting rod (4), top cover (6) and base (7), wherein,
One end of housing (1) vertical direction is connected with the base (7), the other end of housing (1) vertical direction
It is connected with the top cover (6), the height of the housing (1) is 1700-1900mm, and the height of the base is 250-450mm,
The housing (1) is set to isolation material；
One end in the housing (1) of the base (6) sets the line bag (2), and the line bag (2) includes R sections
Core (201), bobbin (202), primary winding (203) and secondary coil (204)；
The bobbin (202) is set on the R shaped iron cores (201), and the secondary coil (204) is wound in the coiling
On skeleton (202), the primary winding (203) is around on the secondary coil (204)；
The Temperature Humidity Sensor (3) includes temperature and humidity sensing probe (301) and data processing module (302), the humiture
Sensing probe (301) is electrically connected with the data processing module (302), and the temperature and humidity sensing probe (301) is arranged at described
On the inside of base (7), the data processing module (302) is arranged on the outside of the base (7)；
The top cover (6) is provided with adpting flange (5), and one end of the conducting rod (4) is connected with the line bag (2), described
The other end of conducting rod (4) is connected with the adpting flange (5).
2. 500kV standard potential transformers according to claim 1, it is characterised in that the height of the housing (1) is
1800mm, the height of the base is 350mm.
3. 500kV standard potential transformers according to claim 2, it is characterised in that the housing (1) and top cover (6)
It is set to epoxy resin material.
4. 500kV standard potential transformers according to claim 1, it is characterised in that the primary winding (203) is most
Latter circle uses the copper foil coiling wide with last layer of the line bag (2).
5. 500kV standard potential transformers according to claim 4, it is characterised in that the primary winding (203) and two
The interlayer of secondary coil (204) is provided with multi-layered polyester barrier film.
6. 500kV standard potential transformers according to claim 1, it is characterised in that the line bag (2) also includes shielding
Plate (205), radome (206) and voltage equalizing ball (207), wherein,
The barricade (205) is set to round rectangle, and barricade (205) described in polylith is symmetrical and is vertically arranged at the line bag
(2) side；
The radome (206) is set to annular, and the radome (206) is concentric to be arranged at the primary winding (203)
Surface；
The voltage equalizing ball (207) is arranged at the outlet port of the primary winding (203).
7. 500kV standard potential transformers according to claim 1, it is characterised in that the data processing module (302)
It is provided with standard digital output display screen and the real-time delivery port of remote data.
8. 500kV standard potential transformers according to claim 1, it is characterised in that the base (7) is provided with first
Port (701), the second installation port (702) and charge valve are installed port (703) are installed, two are provided with the outside of the base (7)
Secondary terminal plate, wherein,
The secondary coil (204) is installed port (701) by described first and electrically connected with the secondary connection plate；
The temperature and humidity sensing probe (301) installs port (702) and the data processing module (302) electricity by described second
Connection.
9. 500kV standard potential transformers according to claim 8, it is characterised in that filled with hexafluoro in the housing (1)
Change sulphur gas, the pressure value of the sulfur hexafluoride gas is set to 0.45Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710641649.5A CN107256761A (en) | 2017-07-31 | 2017-07-31 | 500kV standard potential transformers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710641649.5A CN107256761A (en) | 2017-07-31 | 2017-07-31 | 500kV standard potential transformers |
Publications (1)
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| CN107256761A true CN107256761A (en) | 2017-10-17 |
Family
ID=60026092
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| CN201710641649.5A Pending CN107256761A (en) | 2017-07-31 | 2017-07-31 | 500kV standard potential transformers |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114563530A (en) * | 2022-02-28 | 2022-05-31 | 深圳供电局有限公司 | Method for detecting moisture absorption performance of absorbent in voltage transformer |
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| CN103325558A (en) * | 2013-07-17 | 2013-09-25 | 国家电网公司 | High-altitude high-capacity indoor all-insulation voltage transformer |
| WO2015090119A1 (en) * | 2013-12-17 | 2015-06-25 | 国家电网公司 | Full-shielding high-voltage isolated-type voltage transformer |
| CN204029599U (en) * | 2014-08-25 | 2014-12-17 | 浙江北互互感器有限公司 | A kind of dry type compound insulation current transformer |
| CN104867667A (en) * | 2015-06-03 | 2015-08-26 | 宁波仁栋电气有限公司 | Intelligent oil-immersed transformer and monitoring system and method |
| CN105742044A (en) * | 2016-05-11 | 2016-07-06 | 山东泰开互感器有限公司 | 500kV wide-transformation-ratio standard voltage transformer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114563530A (en) * | 2022-02-28 | 2022-05-31 | 深圳供电局有限公司 | Method for detecting moisture absorption performance of absorbent in voltage transformer |
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