CN206236531U - For the high pressure protector of distribution transformer - Google Patents
For the high pressure protector of distribution transformer Download PDFInfo
- Publication number
- CN206236531U CN206236531U CN201621026364.8U CN201621026364U CN206236531U CN 206236531 U CN206236531 U CN 206236531U CN 201621026364 U CN201621026364 U CN 201621026364U CN 206236531 U CN206236531 U CN 206236531U
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- Prior art keywords
- distribution transformer
- phase magnetic
- switch
- maintained switch
- high pressure
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- 230000001012 protector Effects 0.000 title claims abstract description 20
- 239000002828 fuel tank Substances 0.000 claims abstract description 32
- 238000010891 electric arc Methods 0.000 claims description 4
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 abstract description 12
- 238000005260 corrosion Methods 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 5
- 238000009413 insulation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 235000015927 pasta Nutrition 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- Protection Of Transformers (AREA)
Abstract
The utility model embodiment provides a kind of high pressure protector for distribution transformer, and the device includes：Three-phase magnetic maintained switch, the first end of the three-phase magnetic maintained switch is connected with bushing, second end of the three-phase magnetic maintained switch is connected with the high-tension coil lead of distribution transformer device body, the three-phase magnetic maintained switch is arranged in the fuel tank of the distribution transformer, during for being more than preset temperature value in the oil temperature for detecting the temperature of the distribution transformer and/or the distribution transformer fuel tank, the on-load switch in the three-phase magnetic maintained switch is threaded off.The program can expand the protection domain to distribution transformer, not have the problem that contact is exposed, can avoid the problems such as by external force, foreign matter intrusion and corrosion, so as to improve the safe and reliable property of distribution transformer high voltage protective.
Description
Technical field
The utility model is related to distribution technique field, more particularly to a kind of high pressure protector for distribution transformer.
Background technology
At present, distribution becomes platform and uses fuse switch on post traditional in the power distribution network, as distribution transformer point
Close, short circuit and overload protection are switched.But this kind of mode exposed position is more, adverse weather conditions and line service amount are easily received
Greatly.Meanwhile, fuse switch protection has following not enough in itself：Fuse switch protection can not be to distribution transformer oil temperature
Exception is protected, and overload protection ability is poor, and protection feature deviation is big, and it is unreliable to act；Upper and lower contact is exposed, fortune
Easily invaded by external force, foreign matter in row, easily cause short circuit；Its contact usually due to corrosion and spring fatigue, forms release sometimes
Be welded.
Utility model content
The utility model embodiment provides a kind of high pressure protector for distribution transformer, to solve prior art
In to distribution transformer high voltage protective when protection domain is small, security reliability is low technical problem.The device includes：Three-phase magnetic is protected
Hold switch, the first end of the three-phase magnetic maintained switch is connected with bushing, the second end of the three-phase magnetic maintained switch with
The high-tension coil lead connection of distribution transformer device body, the three-phase magnetic maintained switch is arranged on the fuel tank of the distribution transformer
It is interior, for being more than preset temperature in the oil temperature for detecting the temperature of the distribution transformer and/or the distribution transformer fuel tank
During value, the on-load switch in the three-phase magnetic maintained switch is threaded off.
In one embodiment, the three-phase magnetic maintained switch, specifically for the biography in the three-phase magnetic maintained switch
The oil temperature of temperature and/or the distribution transformer fuel tank that sensor combine detection goes out the distribution transformer is more than preset temperature value
When, the on-load switch in the three-phase magnetic maintained switch is threaded off simultaneously to the three-phase high voltage coil of the distribution transformer device body.
In one embodiment, the three-phase magnetic maintained switch, including：Arc extinguishing structure, protects for extinguishing the three-phase magnetic
Hold the electric arc produced when the on-load switch in switch is threaded off.
In one embodiment, the three-phase magnetic maintained switch is arranged on the side wall of the fuel tank of the distribution transformer,
The three-phase magnetic maintained switch keeps level and vertical with fuel tank sidewall.
In one embodiment, the three-phase magnetic maintained switch becomes on center symmetrical above and below with the distribution
The oily top layer of depressor fuel tank keeps predeterminable range so that the float of the three-phase magnetic maintained switch does not sink.
In one embodiment, the center symmetrical above and below of the three-phase magnetic maintained switch is less than the oily top layer
Distance is more than 167 millimeters.
In one embodiment, also include：Backup fuse, the first end of the backup fuse and the bushing
Connection, the second end of the backup fuse is connected with the first end of the three-phase magnetic maintained switch, for becoming in the distribution
The electric current of depressor fuses when being more than pre-set current value.
In one embodiment, the backup fuse is arranged in the fuel tank of the distribution transformer.
In one embodiment, the backup fuse is arranged on the side wall of the fuel tank of the distribution transformer, described
Fixed support bolt connection on the base plate perforate of backup fuse and the side wall.
In one embodiment, the material of the base plate of the backup fuse is epoxy resin bonded fiber.
In the utility model embodiment, high voltage protective, three are carried out to distribution transformer by three-phase magnetic maintained switch
Phase magnetic maintained switch is more than preset temperature value in the oil temperature for detecting the temperature of distribution transformer and/or distribution transformer fuel tank
When, the on-load switch in three-phase magnetic maintained switch is threaded off, and cuts off distribution transformer power supply so as to distribution transformer due to mistake
The temperature that load, short circuit etc. cause is too high or situation of high oil temperature can be protected, and can be prevented effectively from distribution transformer in height
The lower operation of temperature, prevents the distribution transformer failure that high oil temperature causes.The middle fuse switch for using compared with the prior art, can
To expand the protection domain to distribution transformer, meanwhile, for three-phase magnetic maintained switch is with respect to fuse switch, there is no contact
Exposed problem, can avoid the problems such as by external force, foreign matter intrusion and corrosion, so as to improve distribution transformer high voltage protective
Safe and reliable property.
Brief description of the drawings
Accompanying drawing described herein is used for providing being further understood to of the present utility model, constitutes the part of the application,
Do not constitute to restriction of the present utility model.In the accompanying drawings：
Fig. 1 is a kind of connection signal of high pressure protector for distribution transformer that the utility model embodiment is provided
Figure；
Fig. 2 is a kind of specific three-phase magnetic maintained switch connection diagram that the utility model embodiment is provided；
Fig. 3 is a kind of specific three-phase magnetic maintained switch structural representation that the utility model embodiment is provided；
Fig. 4 is the front view that a kind of three-phase magnetic maintained switch that the utility model embodiment is provided is fixed；
Fig. 5 is the right view that a kind of three-phase magnetic maintained switch that the utility model embodiment is provided is fixed；
Fig. 6 is a kind of company of high pressure protector specific for distribution transformer that the utility model embodiment is provided
Connect schematic diagram；
Fig. 7 is the side view that a kind of backup fuse that the utility model embodiment is provided is fixed；
Fig. 8 is the top view that a kind of backup fuse that the utility model embodiment is provided is fixed；
Fig. 9 is the front view that a kind of backup fuse that the utility model embodiment is provided is fixed.
Specific embodiment
To make the purpose of this utility model, technical scheme and advantage become more apparent, with reference to implementation method and attached
Figure, is described in further details to the utility model.Here, exemplary embodiment of the present utility model and its illustrating for solving
The utility model is released, but is not intended as to restriction of the present utility model.
In the utility model embodiment, there is provided a kind of high pressure protector for distribution transformer, such as Fig. 1 institutes
Show, the device includes：
Three-phase magnetic maintained switch 101, first end 201 and the 10kV high-pressure sides gland high of the three-phase magnetic maintained switch 101
Pipe 102 is connected, and the second end 202 and the high-tension coil lead of distribution transformer device body 103 of the three-phase magnetic maintained switch 101 connect
Connect, the three-phase magnetic maintained switch is arranged in the fuel tank of the distribution transformer, for detecting the distribution transformer
Temperature and/or the oil temperature of distribution transformer fuel tank when being more than preset temperature value, it is negative in the three-phase magnetic maintained switch
Lotus switch trip.
Shown in Fig. 1,2, in the utility model embodiment, by three-phase magnetic maintained switch come to distribution transformer
High voltage protective is carried out, three-phase magnetic maintained switch is detecting the oil temperature of the temperature of distribution transformer and/or distribution transformer fuel tank
During more than preset temperature value, the on-load switch in three-phase magnetic maintained switch is threaded off, and cuts off distribution transformer power supply so as to distribution
Transformer can be prevented effectively from and match somebody with somebody because the temperature that overload, short circuit etc. cause is too high or situation of high oil temperature can be protected
Piezoelectric transformer runs at high temperature, prevents the distribution transformer failure that high oil temperature causes.Compared with the prior art it is middle use fall
The formula that falls fuse, can expand the protection domain to distribution transformer, meanwhile, three-phase magnetic maintained switch is with respect to fuse switch
For, there is no the problem that contact is exposed, can avoid the problems such as by external force, foreign matter intrusion, abnormal weather and corrosion, from
And improve the safe and reliable property of distribution transformer high voltage protective.Raising power distribution network power supply reliability, reduction user is conducive to stop
Electric loss, the image for improving user satisfaction and lifting power supply enterprise.
Additionally, above-mentioned three-phase magnetic maintained switch can be dual factors on-load switch, for based on detection electric current, temperature etc. because
Element implements the dropout of on-load switch, realizes to distribution transformer secondary circuit short-circuit and overload protection, and can realize becoming distribution
The oil temperature protection of depressor, is provided simultaneously with on-load switch effect, can divide, close distribution transformer.Above-mentioned three-phase magnetic maintained switch makes
With, the overall structure that distribution on post becomes platform is also simplify, it is more convenient installation and repairing.Meanwhile, compared compared with fuse switch, no
Need frequently to change fuse, with reusable advantage, while the two station loads that instead of traditional American transformer substation are opened
Close.
Specifically, above-mentioned distribution transformer 103 can be traditional S13 types distribution transformer, the application is not specifically limited.
During specific implementation, in order to improve the protective value to distribution transformer high voltage protective, it is to avoid distribution transformer phase shortage
Operation, in the present embodiment, the three-phase magnetic maintained switch, specifically for the sensor group in the three-phase magnetic maintained switch
When conjunction detects that the temperature of the distribution transformer and/or the oil temperature of the distribution transformer fuel tank are more than preset temperature value, institute
The on-load switch stated in three-phase magnetic maintained switch is threaded off simultaneously to the three-phase high voltage coil of the distribution transformer device body.Specifically
, as shown in figure 3, three-phase magnetic maintained switch includes sensor combinations, when any one sensor detects distribution transformer
Temperature and/or distribution transformer fuel tank oil temperature be more than preset temperature value when, the on-load switch in three-phase magnetic maintained switch is all
Can thread off, while can effectively expanding distribution transformer protection domain so that protection feature is more quick and accurate.Additionally, three
On-load switch in phase magnetic maintained switch is that the three-phase high voltage coil of distribution transformer device body is threaded off simultaneously, can be prevented effectively from and match somebody with somebody
Piezoelectric transformer phase-deficient operation.
During specific implementation, the three-phase magnetic maintained switch, including：Arc extinguishing structure, keeps opening for extinguishing the three-phase magnetic
The electric arc that the on-load switch in the Central Shanxi Plain is produced when threading off.Specifically, as shown in figure 3, the arc extinguishing structure can be arc-chutes, working as transformation
Device secondary side overloads or during short circuit, and sensor sensing temperature in three-phase magnetic maintained switch simultaneously makes on-load switch moment thread off, and
The moving contact separating brake being connected with distribution transformer mains side, going out in distribution transformer insulating oil are driven by operating mechanism
Arc structure can extinguish the electric arc produced when cut-offfing.
During specific implementation, the above-mentioned high pressure protector for distribution transformer uses all insulation, hermetically sealed structure, subtracts
Few abnormal weather, lifts security reliability.The three-phase magnetic maintained switch is arranged in the fuel tank of the distribution transformer
Side wall on, the three-phase magnetic maintained switch keeps level and vertical with fuel tank sidewall, specifically, as shown in Figure 4,5, three-phase magnetic
Maintained switch needs to be installed by distribution transformer fuel tank tank wall open pore level, and fixation must be vertical with tank wall guarantee, in order to ensure
The structural strength and operating reliability of three-phase magnetic maintained switch, the welding of the wall 501 angle steel fixed support in distribution transformer fuel tank side
401, and be fixed with bolts with three-phase magnetic maintained switch bottom insulation plate perforate.
It is in the present embodiment, described in order to avoid three-phase magnetic maintained switch is acted under low oil level state during specific implementation
The oily top layer on center symmetrical above and below and the distribution transformer fuel tank of three-phase magnetic maintained switch keep it is default away from
From so that the float of the three-phase magnetic maintained switch does not sink.Specifically, as shown in figure 5, the three-phase magnetic maintained switch it is upper
Symmetrical center (position as shown in phantom in Figure 5) can be more than 167 millimeters less than the distance of the oily top layer down, in case
Only the float of three-phase magnetic maintained switch sinks to causing to close a floodgate caused by pasta is too low.
Specific embodiment, in order to further improve the high voltage protective performance to distribution transformer, as shown in fig. 6, in this reality
Apply in example, the above-mentioned high pressure protector for distribution transformer also includes：Backup fuse 601, the backup fuse
601 first end is connected with the bushing 102, and the second end of the backup fuse 601 keeps opening with the three-phase magnetic
101 first end connection is closed, for being fused when the electric current of the distribution transformer is more than predetermined current.In distribution transformer
When electric current is more than pre-set current value, backup fuse 601 fuses prior to three-phase magnetic maintained switch, cuts off the electricity of distribution transformer
Source, makes maximum fault current be minimized the pressure that the equipment such as distribution transformer and distribution network systems are caused, for example, standby fuses
Device 601 can more rapidly cut off the alternate big short circuit current failure of winding, by distribution transformer device body and annex and isolation of system,
Distribution transformer is avoided to be damaged by bigger, while protecting distribution transformer upstream device；When the electric current of distribution transformer is less than
Above-mentioned pre-set current value and due to short circuit or overload etc. reason electric current moment become greatly cause distribution transformer temperature reach it is above-mentioned pre-
If during temperature value, threading off to cut off the power supply of distribution transformer by the on-load switch in three-phase magnetic maintained switch, to realize matching somebody with somebody
The overload of piezoelectric transformer, oil temperature protection.Have by using cooperatively for backup fuse 601 and three-phase magnetic maintained switch 101
Effect improves the protective capability to distribution transformer.
Specifically, for example, being the distribution transformer of 315kV for capacity, above-mentioned pre-set current value can be 630A, that is, work as
When the electric current of distribution transformer is more than 630A, backup fuse 601 fuses prior to three-phase magnetic maintained switch, cuts off distribution transformer
Power supply, when distribution transformer electric current be less than 630A when, due to short circuit or overload etc. reason electric current moment become greatly cause distribution
When transformer temperature reaches above-mentioned preset temperature value, thread off to cut off distribution change by the on-load switch in three-phase magnetic maintained switch
The power supply of depressor；Similarly, it is the distribution transformer of 400kV for capacity, above-mentioned pre-set current value can be 750A；For capacity
It is the distribution transformer of 630kV, above-mentioned pre-set current value can be 1600A.
During specific implementation, in order to realize all insulation, hermetically sealed structure, backup fuse 601 is protected using sealed design
Will not be to discharging any gas or fragment in distribution transformer case during card fusing, therefore the backup fuse is arranged on described matching somebody with somebody
In the fuel tank of piezoelectric transformer.Specifically, the backup fuse 601 is arranged on the side wall of the fuel tank of the distribution transformer,
As shown in Fig. 7,8,9, the bolt connection of fixed support 701 on the base plate perforate of the backup fuse 601 and the side wall.Example
Such as, backup fuse base plate perforate carries out bolt connection with the angle bar frame on tank wall.
Specifically, the material of the base plate of the backup fuse can be epoxy resin bonded fiber.
During specific implementation, above-mentioned three-phase magnetic maintained switch 101 is connected with 10kV high-pressure sides bushing, three-phase magnetic keeps opening
Pass is connected with the high-tension coil lead of distribution transformer device body and backup fuse 601 is connected with 10kV high-pressure sides bushing
Connected mode use cold-press process.
In the utility model embodiment, high voltage protective, three are carried out to distribution transformer by three-phase magnetic maintained switch
Phase magnetic maintained switch is more than preset temperature value in the oil temperature for detecting the temperature of distribution transformer and/or distribution transformer fuel tank
When, the on-load switch in three-phase magnetic maintained switch is threaded off, and cuts off distribution transformer power supply so as to distribution transformer due to mistake
The temperature that load, short circuit etc. cause is too high or situation of high oil temperature can be protected, and can be prevented effectively from distribution transformer in height
The lower operation of temperature, prevents the distribution transformer failure that high oil temperature causes.The middle fuse switch for using compared with the prior art, can
To expand the protection domain to distribution transformer, meanwhile, for three-phase magnetic maintained switch is with respect to fuse switch, there is no contact
Exposed problem, can avoid the problems such as by external force, foreign matter intrusion and corrosion, so as to improve distribution transformer high voltage protective
Safe and reliable property.
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 embodiment can have various modifications and variations.It is all in spirit of the present utility model
Within principle, 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 high pressure protector for distribution transformer, it is characterised in that including：
Three-phase magnetic maintained switch, the first end of the three-phase magnetic maintained switch is connected with bushing, and the three-phase magnetic keeps opening
The second end closed is connected with the high-tension coil lead of distribution transformer device body, and the three-phase magnetic maintained switch is arranged on the distribution
In the fuel tank of transformer, for detecting the oil temperature of the temperature of the distribution transformer and/or the distribution transformer fuel tank
During more than preset temperature value, the on-load switch in the three-phase magnetic maintained switch is threaded off.
2. the high pressure protector of distribution transformer is used for as claimed in claim 1, it is characterised in that the three-phase magnetic keeps
Switch, specifically for the sensor combinations in the three-phase magnetic maintained switch detect the distribution transformer temperature and/
Or the oil temperature of the distribution transformer fuel tank be more than preset temperature value when, the on-load switch in the three-phase magnetic maintained switch is to institute
The three-phase high voltage coil for stating distribution transformer device body is threaded off simultaneously.
3. the high pressure protector of distribution transformer is used for as claimed in claim 1, it is characterised in that the three-phase magnetic keeps
Switch, including：
Arc extinguishing structure, for extinguishing the electric arc produced when the on-load switch in the three-phase magnetic maintained switch is threaded off.
4. the high pressure protector of distribution transformer is used for as claimed in claim 1, it is characterised in that the three-phase magnetic keeps
On the side wall of the fuel tank of the distribution transformer, the three-phase magnetic maintained switch keeps level and and fuel tank sidewall to switch
Vertically.
5. the high pressure protector of distribution transformer is used for as claimed in claim 1, it is characterised in that the three-phase magnetic keeps
The oily top layer holding predeterminable range on center symmetrical above and below with the distribution transformer fuel tank of switch so that described
The float of three-phase magnetic maintained switch does not sink.
6. the high pressure protector of distribution transformer is used for as claimed in claim 5, it is characterised in that the three-phase magnetic keeps
The center symmetrical above and below of switch is more than 167 millimeters less than the distance of the oily top layer.
7. the high pressure protector for distribution transformer as any one of claim 1 to 6, it is characterised in that also
Including：
Backup fuse, the first end of the backup fuse is connected with the bushing, and the second of the backup fuse
End is connected with the first end of the three-phase magnetic maintained switch, for when the electric current of the distribution transformer is more than pre-set current value
Fusing.
8. the high pressure protector of distribution transformer is used for as claimed in claim 7, it is characterised in that the backup fuse
In the fuel tank of the distribution transformer.
9. the high pressure protector of distribution transformer is used for as claimed in claim 8, it is characterised in that the backup fuse
On the side wall of the fuel tank of the distribution transformer, the fixation on the base plate perforate of the backup fuse and the side wall
Support bracket bolt is connected.
10. the high pressure protector of distribution transformer is used for as claimed in claim 9, it is characterised in that the standby fusing
The material of the base plate of device is epoxy resin bonded fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621026364.8U CN206236531U (en) | 2016-08-31 | 2016-08-31 | For the high pressure protector of distribution transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621026364.8U CN206236531U (en) | 2016-08-31 | 2016-08-31 | For the high pressure protector of distribution transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206236531U true CN206236531U (en) | 2017-06-09 |
Family
ID=58988904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621026364.8U Active CN206236531U (en) | 2016-08-31 | 2016-08-31 | For the high pressure protector of distribution transformer |
Country Status (1)
| Country | Link |
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| CN (1) | CN206236531U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107799284A (en) * | 2016-08-31 | 2018-03-13 | 国网北京市电力公司 | High pressure protector for distribution transformer |
-
2016
- 2016-08-31 CN CN201621026364.8U patent/CN206236531U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107799284A (en) * | 2016-08-31 | 2018-03-13 | 国网北京市电力公司 | High pressure protector for distribution transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 100031 No. 41 West Main Street, Qianmen, Beijing, Xicheng District Patentee after: STATE GRID BEIJING ELECTRIC POWER Co. Country or region after: China Patentee after: TAIZHOU POWER SUPPLY COMPANY OF STATE GRID JIANGSU ELECTRIC POWER Co. Patentee after: NANJING NARI Group Corp. Patentee after: NARI Intelligent Distribution Technology Co.,Ltd. Patentee after: SHANDONG ELECTRICAL ENGINEERING& EQUIPMENT GROUP INTELLIGENT ELECTRIC Co.,Ltd. Patentee after: XUJI TRANSFORMER Co.,Ltd. Patentee after: COOPER ELECTRONIC TECHNOLOGIES (SHANGHAI) Co.,Ltd. Address before: 100031 No. 41 West Main Street, Qianmen, Beijing, Xicheng District Patentee before: STATE GRID BEIJING ELECTRIC POWER Co. Country or region before: China Patentee before: TAIZHOU POWER SUPPLY COMPANY OF STATE GRID JIANGSU ELECTRIC POWER Co. Patentee before: NANJING NARI Group Corp. Patentee before: BEIJING NANRUI DIANYAN HUAYUAN ELECTRIC POWER TECHNOLOGY CO.,LTD. Patentee before: SHANDONG ELECTRICAL ENGINEERING& EQUIPMENT GROUP INTELLIGENT ELECTRIC Co.,Ltd. Patentee before: XUJI TRANSFORMER Co.,Ltd. Patentee before: COOPER ELECTRONIC TECHNOLOGIES (SHANGHAI) Co.,Ltd. |