CN106680561B - Double-air-chamber direct-current voltage divider - Google Patents
Double-air-chamber direct-current voltage divider Download PDFInfo
- Publication number
- CN106680561B CN106680561B CN201611026203.3A CN201611026203A CN106680561B CN 106680561 B CN106680561 B CN 106680561B CN 201611026203 A CN201611026203 A CN 201611026203A CN 106680561 B CN106680561 B CN 106680561B
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- voltage arm
- low
- voltage
- shell
- arm shell
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- 239000004020 conductor Substances 0.000 claims abstract description 43
- 238000001514 detection method Methods 0.000 claims abstract description 20
- 230000003071 parasitic effect Effects 0.000 claims abstract description 8
- 238000009413 insulation Methods 0.000 claims description 12
- 238000009530 blood pressure measurement Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000011261 inert gas Substances 0.000 claims description 3
- 239000003566 sealing material Substances 0.000 claims description 3
- 239000012774 insulation material Substances 0.000 claims description 2
- 230000009977 dual effect Effects 0.000 claims 1
- 238000007789 sealing Methods 0.000 abstract description 4
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/04—Voltage dividers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The invention provides a double-air-chamber direct current voltage divider which comprises a high-voltage arm and a low-voltage arm which are connected in series through an intermediate connecting conductor, wherein the high-voltage arm is installed in a cylindrical high-voltage arm shell with an insulating section, the upper end of the high-voltage arm is led out from the upper side of the insulating section, the intermediate connecting conductor is led out from the lower side of the insulating section, the lower end of the high-voltage arm shell is connected with a low-voltage arm shell for sealing the low-voltage arm from the external environment, the two ends of the low-voltage arm are connected with pressure measuring conductors, the pressure measuring conductors extend out of the low-voltage arm shell, the intermediate connecting conductor is in insulating fit with the high-voltage arm shell and the low-voltage arm shell, and the pressure measuring conductors are in insulating fit with the low-voltage arm shell. The direct current voltage divider can well avoid parasitic resistance connected with the high-voltage arm in parallel, and improves the detection accuracy.
Description
Technical Field
The invention relates to a double-air-chamber direct current voltage divider.
Background
The direct current voltage divider is mainly a resistance-capacitance direct current voltage divider, and mainly comprises a high-voltage arm and a low-voltage arm which are connected in series, wherein one end, far away from the low-voltage arm, of the high-voltage arm is connected with equipment, one end, far away from the high-voltage arm, of the low-voltage arm is grounded, equipment voltage is divided through the high-voltage arm and the low-voltage arm, then the voltage on the low-voltage arm is detected through detection equipment, the voltage of the equipment can be calculated, the requirement of the detection equipment is reduced, and the detection process is safer.
The high-voltage arm of the traditional direct-current voltage divider is arranged in a cylindrical high-voltage arm shell, outgoing wires are led out from the upper end and the lower end of the cylindrical high-voltage arm shell, an insulating section is arranged in the middle of the cylindrical high-voltage arm shell, the lower end of the high-voltage arm extends out of the high-voltage arm shell through a middle connecting conductor and is connected with a low-voltage arm, and the two ends of the low-voltage arm are respectively connected with a pressure measuring conductor electrically connected with a detection device. In the actual detection process, it is often found that a certain error exists between the device voltage calculated by the detection device and the actual device voltage, and the existence of the error causes great trouble to the detection personnel, so that how to eliminate the error has been a difficult problem.
Disclosure of Invention
The invention aims to provide a double-air-chamber direct current voltage divider with accurate detection.
The double-air-chamber direct current voltage divider comprises a high-voltage arm and a low-voltage arm which are connected in series through an intermediate connecting conductor, wherein the high-voltage arm is installed in a cylindrical high-voltage arm shell with an insulating section, the upper end of the high-voltage arm is led out from the upper side of the insulating section, the intermediate connecting conductor is led out from the lower side of the insulating section, the lower end of the high-voltage arm shell is connected with a low-voltage arm shell for sealing the low-voltage arm from the external environment, two ends of the low-voltage arm are connected with pressure measuring conductors, the pressure measuring conductors extend out of the low-voltage arm shell, the intermediate connecting conductor is in insulating fit with the high-voltage arm shell and the low-voltage arm shell, and the pressure measuring conductors are in insulating fit with the low-voltage arm shell.
The intermediate connection conductor is insulated and isolated from the high-voltage arm shell and the low-voltage arm shell through an insulating wiring disc arranged between the inner cavity of the high-voltage arm shell and the inner cavity of the low-voltage arm shell.
The high-voltage arm shell is connected with the upper side wall of the low-voltage arm shell through the connecting flange at the lower end of the high-voltage arm shell, the upper side wall of the low-voltage arm shell is provided with a threading hole for the middle connecting conductor to pass through, and the insulating wiring disc seals the threading hole.
The inner cavity of the high-pressure arm shell and the inner cavity of the low-pressure arm shell are sealed and isolated and are filled with dry inert gas.
The low-voltage arm shell is in insulation fit with the pressure measurement conductor through an insulation wire outlet structure arranged on the low-voltage arm shell, the insulation wire outlet structure comprises a wire outlet hole and insulation sealing materials encapsulated in the wire outlet hole, the pressure measurement conductor comprises two wiring terminals encapsulated in the insulation materials and leads for respectively connecting the two wiring terminals at two ends of the low-voltage arm, and the outer ends of the wiring terminals extend out of the low-voltage arm shell.
The wiring terminal is a jack contact, and the outer end of the wire outlet hole is provided with a connecting structure for being connected with a plug of the detection equipment, which is provided with a contact pin contact.
The wire outlet holes are horizontally arranged.
And one end of the low-voltage arm, which is far away from the middle connecting conductor, is in conductive connection with the low-voltage arm shell.
The low-voltage arm of the double-air-chamber direct-current voltage divider is sealed and isolated from the external environment through the low-voltage arm shell, the middle connecting conductor is in insulating fit with the high-voltage arm shell and the low-voltage arm shell, and the pressure measuring conductor is in insulating fit with the low-voltage arm shell, so that parasitic resistance connected with the high-voltage arm in parallel is prevented from being generated between the upper end of the high-voltage arm shell and the front end of the low-voltage arm, which is electrically connected with the high-voltage arm, to influence the detection of the partial pressure of the low-voltage arm, and parasitic resistance connected with the high-voltage arm in parallel is prevented from being generated when rainwater or stains are fully distributed on the outer side of the insulating section of the high-voltage arm shell, to influence the detection of the partial pressure of the low-voltage arm, and the accuracy of the detection is improved.
Drawings
FIG. 1 is a schematic diagram of a conventional DC voltage divider;
FIG. 2 is a schematic diagram of a DC voltage divider according to an embodiment of the present invention;
fig. 3 is a schematic diagram of the dc voltage divider of the present invention.
Detailed Description
For a better description of the dc voltage divider of the present invention, the following first describes the use principle of the existing dc voltage divider.
Through long-term research and a large number of experiments on the existing direct current voltage divider, the stain exists on the outer side of the high-voltage arm shell, the stain contains more water, or the insulation section of the high-voltage arm shell cannot achieve good insulation effect in the case of rain weather, or moisture condensation in the outside atmosphere and the like. As shown in FIG. 1, the surface of the insulating material outside the voltage divider, specifically V1 to B, generates a parasitic resistance Rj in parallel with the high voltage arm, rj is incorporated into the high voltage arm 2 of the voltage divider through the point B, and the DC voltage divider becomes a ratio ofBecome->This directly affects the partial pressure of the high-voltage arm and thus directly results in the detection result of the detection device connected to both ends of the low-voltage arm.
The invention aims at improving the problems of the existing direct current voltage divider, so that the transformation ratio of the direct current voltage divider is not influenced by external parasitic resistance generated by rainwater, dirt and atmosphere or parasitic resistance generated by atmospheric micro-water condensation, and the problem of inaccurate detection result when the voltage of equipment is detected through the direct current voltage divider for a long time is solved.
An embodiment of the double air chamber dc voltage divider of the present invention, as shown in fig. 2-3, comprises a high voltage arm 2 and a low voltage arm 4 connected in series by an intermediate connection conductor 16, the high voltage arm 2 being mounted in the inner cavity 1 of the high voltage arm housing, the intermediate connection conductor extending from the lower end of the high voltage arm housing. The high-voltage arm shell is a cylindrical shell, the upper end and the lower end are made of metal materials, and an insulating section 12 is arranged in the middle. The high-voltage arm 2 is connected with the equipment through the upper end outgoing line of the high-voltage arm shell and the wiring row V1. The lower extreme opening of high pressure arm casing just is equipped with flange, and high pressure arm casing has low pressure arm casing 3 through flange connection, and low pressure arm casing 3 is the metal material to with low pressure arm 4 and external link seal isolation. The two ends of the low-voltage arm 4 are also connected with pressure measuring conductors which extend out of the low-voltage arm shell 3 and are used for being connected with pressure measuring equipment. The intermediate connection conductor 16 is insulated from both the high voltage arm housing and the low voltage arm housing during extension from the high voltage arm housing into the low voltage arm housing, and the load conductor is in insulated engagement with the low voltage arm housing during extension from the low voltage arm housing.
In this embodiment, the high-voltage arm housing is connected to the upper side wall of the low-voltage arm housing 3 through a connection flange at the lower end thereof, the upper side wall of the low-voltage arm housing 3 is provided with a threading hole through which the intermediate connection conductor 16 passes, and the upper side wall of the low-voltage arm housing 3 is also provided with an insulating wiring board 10 for plugging the threading hole at the lower side of the threading hole. The intermediate connection conductor 16 enters the low-voltage arm housing from the high-voltage arm housing via the insulating terminal plate 10, achieves insulation from the high-voltage arm housing and the low-voltage arm housing, and simultaneously achieves sealing from the inner space 1 of the high-voltage arm housing and the inner space of the low-voltage arm housing 3 via the upper side wall and the insulating terminal plate. Therefore, the high-voltage arm and the low-voltage arm are arranged in the independent closed inner cavities, the direct-current voltage divider of the embodiment is further filled with dry inert gas in the inner cavities of the high-voltage arm and the low-voltage arm, the insulating and isolating effect of the high-voltage arm and the low-voltage arm and the external environment is improved, and the stability of the transformation ratio of the voltage divider is ensured.
In this embodiment, the low voltage arm housing 3 is in insulated fit with the load conductors by an insulated outlet structure provided thereon. Specifically, the insulating wire outlet structure includes wire outlet 11 and insulating material 5 encapsulated in wire outlet 11, and the wire outlet level sets up and makes the pressure measurement conductor level draw forth, conveniently detects, and of course, in other embodiments, the setting position and the direction of wire outlet can be set up according to actual need, does not do specific requirement. The load conductor comprises two connection terminals 14 in the encapsulation insulating material 5 and wires 15 connecting the two connection terminals 14 at both ends of the low voltage arm 4, respectively, the outer ends of the connection terminals 14 protruding out of the low voltage arm housing. The lower end of the low voltage arm 4 is electrically connected to the low voltage arm housing and finally to ground. Of course, in other embodiments, the low voltage arm may be grounded by a dedicated lead, and the technical improvements of the present invention are not referred to herein, and are not listed.
In this embodiment, in order to facilitate the conductive connection between the pressure measuring device and the low voltage arm 4, the connection terminal 14 adopts a jack contact, and the jack contact is mainly used to directly adopt a plug with a pin contact that is assembled with the jack contact to realize the conductive connection between the pressure measuring device and the low voltage arm, so that the detection process is simpler. As shown in fig. 1, the outer end of the wire outlet is provided with a connecting hole for being connected with the plug shell 7 by a bolt, the hole edges of the plug shell 7 and the wire outlet are sealed by a sealing ring 13, and a contact pin contact piece which is inserted and matched with the jack contact piece is packaged in the plug shell 7 by an insulating sealing material 8 and a potting structure 9. Meanwhile, the pressure measuring conductor can be prevented from being in contact with water condensation or rainwater in the external environment, and good insulation and isolation are guaranteed.
The principle of the direct current voltage divider is shown in fig. 2, because the middle connecting conductor is insulated and isolated from the high-voltage arm shell and the low-voltage arm shell, the pressure measuring conductor is insulated and isolated from the low-voltage arm shell, and the low-voltage arm shell seals the low-voltage arm inside, even if stains exist on the outer side of the high-voltage arm shell and contain more moisture, or parasitic resistance Rj connected with the high-voltage arm in parallel is not generated in the case of rain or moisture condensation in the outside atmosphere, and the like, the stability of the partial pressure of the high-voltage arm and the low-voltage arm is ensured, and the accuracy of the detection result of pressure measuring equipment is ensured.
The invention also provides a second embodiment of the direct current voltage divider, in the second embodiment, the high voltage arm shell and the low voltage arm shell are not plugged through an insulating wiring board, namely, the inner cavity of the high voltage arm shell and the inner cavity of the low voltage arm shell are communicated with each other, and the middle conductor is insulated and isolated from the high voltage arm shell and the low voltage arm shell through internal gas.
In the third embodiment, the low-voltage arm shell can be of a cylindrical structure with an opening at the upper end, the high-voltage arm shell is in butt joint with the opening at the upper end of the low-voltage arm shell through a connecting flange at the opening at the lower end of the low-voltage arm shell, an insulating partition plate is further clamped between the lower end of the high-voltage arm shell and the upper end of the low-voltage arm shell, and the middle connecting conductor penetrates through the insulating partition plate and is insulated and isolated from the high-voltage arm shell and the low-voltage arm shell through the insulating partition plate.
Claims (6)
1. The double-air-chamber direct current voltage divider comprises a high-voltage arm and a low-voltage arm which are connected in series through an intermediate connecting conductor, wherein the high-voltage arm is installed in a cylindrical high-voltage arm shell with an insulating section, the upper end of the high-voltage arm is led out from the upper side of the insulating section, and the intermediate connecting conductor is led out from the lower side of the insulating section; the low-voltage arm shell is in insulation fit with the pressure measurement conductor through an insulation wire outlet structure arranged on the low-voltage arm shell, the insulation wire outlet structure comprises a wire outlet hole and insulation sealing materials encapsulated in the wire outlet hole, and the pressure measurement conductor comprises two wiring terminals encapsulated in the insulation materials and wires respectively connecting the two wiring terminals at two ends of the low-voltage arm; the middle connecting conductor is insulated and isolated from the high-voltage arm shell and the low-voltage arm shell through an insulating wiring board arranged between the inner cavity of the high-voltage arm shell and the inner cavity of the low-voltage arm shell; the upper side wall of the low-voltage arm shell is provided with a threading hole for the middle connecting conductor to pass through, and the insulating wiring disc seals the threading hole; the inner cavity of the high-pressure arm shell and the inner cavity of the low-pressure arm shell are sealed and isolated, and the interiors of the high-pressure arm shell and the inner cavity of the low-pressure arm shell are filled with dry inert gas; therefore, even if stains exist on the outer side of the high-voltage arm shell and the stains contain more water, parasitic resistance connected with the high-voltage arm in parallel cannot be generated, the stability of partial pressure of the high-voltage arm and the low-voltage arm is guaranteed, and the accuracy of the detection result of the pressure measuring equipment is guaranteed.
2. The double plenum dc voltage divider of claim 1 wherein the high voltage arm housing is connected to the upper side wall of the low voltage arm housing by a connecting flange at the lower end thereof.
3. A double air chamber dc voltage divider according to claim 1 or 2, characterized in that the outer end of the connection terminal extends out of the low voltage arm housing.
4. A double air chamber dc voltage divider according to claim 3, characterized in that the connection terminal is a socket contact, and the outer end of the wire outlet is provided with a connection structure for connection with a plug of a detection device having a pin contact.
5. A dual plenum dc voltage divider as set forth in claim 3 wherein said wire exit holes are horizontally disposed.
6. A double plenum dc voltage divider as claimed in claim 1 or 2, wherein the end of the low voltage arm facing away from the intermediate connection conductor is electrically conductively connected to the low voltage arm housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611026203.3A CN106680561B (en) | 2016-11-18 | 2016-11-18 | Double-air-chamber direct-current voltage divider |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611026203.3A CN106680561B (en) | 2016-11-18 | 2016-11-18 | Double-air-chamber direct-current voltage divider |
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| Publication Number | Publication Date |
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| CN106680561A CN106680561A (en) | 2017-05-17 |
| CN106680561B true CN106680561B (en) | 2023-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611026203.3A Active CN106680561B (en) | 2016-11-18 | 2016-11-18 | Double-air-chamber direct-current voltage divider |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110850139B (en) * | 2018-08-21 | 2022-02-01 | 西安西电高压开关有限责任公司 | Voltage measuring device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08219917A (en) * | 1995-02-08 | 1996-08-30 | Fuji Electric Co Ltd | Lead-out structure at differential pressure detecting part in differential pressure detector |
| CN2741158Y (en) * | 2004-09-23 | 2005-11-16 | 中电电气集团有限公司 | Low-voltage outlet device of underground transformer |
| CN101183121A (en) * | 2007-12-17 | 2008-05-21 | 国网武汉高压研究院 | Extra-high voltage reference capacitor |
| CN104360141A (en) * | 2014-11-14 | 2015-02-18 | 国家电网公司 | Stand-off ratio voltage coefficient detection method based on separable direct current voltage divider |
| CN204228774U (en) * | 2014-11-14 | 2015-03-25 | 国家电网公司 | A kind of 1000kV DC partial voltage for DC voltage addition test compares standard set-up |
| CN104655896A (en) * | 2015-02-13 | 2015-05-27 | 咸阳永泰电力电子科技有限公司 | Detachable AC/DC voltage divider |
| RU166007U1 (en) * | 2016-04-13 | 2016-11-10 | федеральное государственное бюджетное образовательное учреждение высшего образования "Ивановский государственный энергетический университет имени В.И. Ленина" (ИГЭУ) | HIGH VOLTAGE MEASURING VOLTAGE CONVERTER |
| CN206281888U (en) * | 2016-11-18 | 2017-06-27 | 国家电网公司 | The divider of insulator surface dead resistance under the conditions of a kind of blocking filth |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB607921A (en) * | 1946-03-09 | 1948-09-07 | Rudolph Conrad De Holzer | Airtight inductor and transformer |
-
2016
- 2016-11-18 CN CN201611026203.3A patent/CN106680561B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08219917A (en) * | 1995-02-08 | 1996-08-30 | Fuji Electric Co Ltd | Lead-out structure at differential pressure detecting part in differential pressure detector |
| CN2741158Y (en) * | 2004-09-23 | 2005-11-16 | 中电电气集团有限公司 | Low-voltage outlet device of underground transformer |
| CN101183121A (en) * | 2007-12-17 | 2008-05-21 | 国网武汉高压研究院 | Extra-high voltage reference capacitor |
| CN104360141A (en) * | 2014-11-14 | 2015-02-18 | 国家电网公司 | Stand-off ratio voltage coefficient detection method based on separable direct current voltage divider |
| CN204228774U (en) * | 2014-11-14 | 2015-03-25 | 国家电网公司 | A kind of 1000kV DC partial voltage for DC voltage addition test compares standard set-up |
| CN104655896A (en) * | 2015-02-13 | 2015-05-27 | 咸阳永泰电力电子科技有限公司 | Detachable AC/DC voltage divider |
| RU166007U1 (en) * | 2016-04-13 | 2016-11-10 | федеральное государственное бюджетное образовательное учреждение высшего образования "Ивановский государственный энергетический университет имени В.И. Ленина" (ИГЭУ) | HIGH VOLTAGE MEASURING VOLTAGE CONVERTER |
| CN206281888U (en) * | 2016-11-18 | 2017-06-27 | 国家电网公司 | The divider of insulator surface dead resistance under the conditions of a kind of blocking filth |
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| CN106680561A (en) | 2017-05-17 |
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Effective date of registration: 20170816 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant after: State Grid Corporation of China Applicant after: XJ Group Corp. Applicant after: STATE GRID LIAONING ELECTRIC POWER Research Institute Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant before: State Grid Corporation of China Applicant before: XJ Group Corp. |
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Address after: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Patentee after: STATE GRID CORPORATION OF CHINA Patentee after: XJ Group Corp. Patentee after: STATE GRID LIAONING ELECTRIC POWER Research Institute Address before: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Patentee before: State Grid Corporation of China Patentee before: XJ Group Corp. Patentee before: STATE GRID LIAONING ELECTRIC POWER Research Institute |
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Effective date of registration: 20240111 Address after: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Patentee after: STATE GRID CORPORATION OF CHINA Patentee after: XJ Group Corp. Patentee after: STATE GRID LIAONING ELECTRIC POWER Research Institute Patentee after: XJ ELECTRIC Co.,Ltd. Address before: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Patentee before: STATE GRID CORPORATION OF CHINA Patentee before: XJ Group Corp. Patentee before: STATE GRID LIAONING ELECTRIC POWER Research Institute |