CN209419226U - In-place reactive power compensation device - Google Patents
In-place reactive power compensation device Download PDFInfo
- Publication number
- CN209419226U CN209419226U CN201720091394.5U CN201720091394U CN209419226U CN 209419226 U CN209419226 U CN 209419226U CN 201720091394 U CN201720091394 U CN 201720091394U CN 209419226 U CN209419226 U CN 209419226U
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- Prior art keywords
- capacitor
- reactive power
- power compensation
- loop
- compensation device
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- 239000003990 capacitor Substances 0.000 claims abstract description 128
- HPDFFVBPXCTEDN-UHFFFAOYSA-N copper manganese Chemical compound [Mn].[Cu] HPDFFVBPXCTEDN-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910000881 Cu alloy Inorganic materials 0.000 claims abstract description 7
- 239000000956 alloy Substances 0.000 claims abstract description 7
- 230000005611 electricity Effects 0.000 claims description 8
- 239000013589 supplement Substances 0.000 claims description 7
- 240000007594 Oryza sativa Species 0.000 claims 1
- 235000007164 Oryza sativa Nutrition 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 claims 1
- VIKNJXKGJWUCNN-XGXHKTLJSA-N norethisterone Chemical compound O=C1CC[C@@H]2[C@H]3CC[C@](C)([C@](CC4)(O)C#C)[C@@H]4[C@@H]3CCC2=C1 VIKNJXKGJWUCNN-XGXHKTLJSA-N 0.000 claims 1
- 235000009566 rice Nutrition 0.000 claims 1
- 230000001360 synchronised effect Effects 0.000 abstract description 18
- 238000005245 sintering Methods 0.000 abstract description 8
- 238000009434 installation Methods 0.000 abstract description 7
- 239000012141 concentrate Substances 0.000 abstract description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000001012 protector Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Landscapes
- Control Of Electrical Variables (AREA)
Abstract
The utility model discloses a kind of in-place reactive power compensation devices, including cabinet body, capacitor and the multiple groups capacitor loop connecting with the capacitor；The capacitor and the capacitor loop are arranged at the interior of the cabinet；The connecting line of the capacitor loop is to grip to gush resistance made of manganese copper alloy material.The utility model concentrates on capacitor and its capacitor loop of connection in cabinet body, to reduce the volume of whole device；And resistance is gushed using the manganese copper alloy material of high resistivity as gripping for capacitor loop, instead of connecting long electric wire, not only the short connecting line length requirement that small size installation needs had been met, but also has met the requirement of capacitor loop middle impedance value, and pass through the needs of bulky capacitor electric current.The impedance and size of gushing resistance are gripped in use, can determine according to specific capacitor loop demand, to eliminate the phenomenon of the failure that the sintering of capacitor Intelligent Synchronous Switch contact can not separate, safe and efficient can realize and be installed and used on the spot in load-side.
Description
Technical field
The utility model relates to power supply technique field, in particular to a kind of in-place reactive power compensation device.
Background technique
In general, centralized Scheme of Reactive Power Compensation is all made of, because of designing institute at this time when the design of user's power distribution room is done by designing institute
The transformer capacity for only knowing user's application, without knowing that the specifically used how many load of user and load use specifically
Point position, so local reactive power compensation conceptual design can not be carried out in advance.In-place reactive power compensation device is for fabricating yard
It is required that occupy little space, it is flexible for installation.In fact, being compared using load-side local reactive power compensation scheme using supply side centralization
It is more preferable to can reduce line loss, the effect of compensating power for Scheme of Reactive Power Compensation.
However existing in-place reactive power compensation device, usual volume is larger (being greater than 0.5 cubic metre), is not easy to user scene
Installation.If reducing the volume of in-place reactive power compensation device, it is meant that have to the connection copper of capacitor loop in shortening device
Line, however there is the contact sintering nothing of capacitor Intelligent Synchronous Switch at runtime in the reactive power compensator for saving connection copper wire
The separated phenomenon of the failure of method.
Therefore, existing in-place reactive power compensation device, there are capacitor intelligent synchronizations on the basis of guaranteeing smaller size smaller
Sintering occurs for the contact of switch and the defect that can not separate, thus can not safe and efficient realization install and make on the spot in load-side
With.
Utility model content
In-place reactive power compensation device provided by the utility model, including cabinet body, capacitor and connect with the capacitor
Multiple groups capacitor loop；
The capacitor and the capacitor loop are arranged at the interior of the cabinet；
The connecting line of the capacitor loop is to grip to gush resistance made of manganese copper alloy material.
As an embodiment, the volume of the cabinet body is less than 0.2 cubic metre.
As an embodiment, it is described grip gush resistance resistance value be 5 milliohms.
As an embodiment, the quantity of the capacitor loop is 6.
As an embodiment, the in-place reactive power compensation device of the utility model further included discharge time less than 3 seconds
Discharger；
The discharger is located at the interior of the cabinet, in parallel with the capacitor.
As an embodiment, the discharger include inductance and with the concatenated resistance of the inductance.
As an embodiment, the capacitor is three-phase compensation capacitor or three-phase separate-supplement capacitor.
As an embodiment, the discharger has 3；
3 dischargers are sequentially connected, and form the combined discharge device for three-phase separate-supplement capacitor discharge.
As an embodiment, the discharger has 3；
Two of them in 3 dischargers are parallel with one another, and connect with remaining one, formed for three-phase compensation capacitor
The combined discharge device of device electric discharge.
As an embodiment, the in-place reactive power compensation device of the utility model further includes temperature controller and axis
Flow fan；
The temperature controller and the aerofoil fan are located at the interior of the cabinet, and the temperature controller connects the axis
Flow fan；When the temperature of the capacitor is more than preset temperature threshold, the temperature controller controls the aerofoil fan pair
The capacitor cools down.
The beneficial effects of the utility model compared with the prior art lie in:
Capacitor and its capacitor loop of connection are concentrated on cabinet body by in-place reactive power compensation device provided by the utility model
In, to reduce the volume of whole device；And resistance is gushed using the manganese copper alloy material of high resistivity as gripping for capacitor loop, generation
For long electric wire is connected, the short connecting line length requirement that small size installation needs not only was met, but also meet capacitor loop middle impedance
The requirement of value, and the needs by bulky capacitor electric current.Resistance is gushed in use, can determine to grip according to specific capacitor loop demand
Impedance and size safety and can have to eliminate the phenomenon of the failure that the sintering of capacitor Intelligent Synchronous Switch contact can not separate
The realization of effect is installed and used on the spot in load-side.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the in-place reactive power compensation device that the utility model embodiment one provides；
Fig. 2 is to grip the main view for gushing resistance shown in Fig. 1；
Fig. 3 is to grip the top view for gushing resistance shown in Fig. 1；
Fig. 4 connect circuit diagram with the one of three-phase compensation capacitor for discharger shown in Fig. 1；
Fig. 5 is another connection circuit diagram of discharger and three-phase compensation capacitor shown in Fig. 1；
Fig. 6 is quickly to be put using the three-phase separate-supplement capacitor to synchronous switch switching that discharger shown in Fig. 1 forms
The schematic illustration of the combined discharge device of electricity；
Fig. 7 is quickly to be put using the three-phase compensation capacitor to synchronous switch switching that discharger shown in Fig. 1 forms
The schematic illustration of the combined discharge device of electricity.
Specific embodiment
Below in conjunction with attached drawing, the above and other technical features and advantages of the present invention are carried out clearly and completely
Description, it is clear that described embodiment is only the section Example of the utility model, rather than whole embodiments.
It burns the contact for the Intelligent Synchronous Switch that the reactive power compensator for saving connection copper wire has capacitor at runtime
The phenomenon of the failure that knot can not separate, and the intelligence of capacitor is not present in same capacitor in bulky reactive power compensator
Can synchronous switch contact sintering and can not separate phenomenon of the failure.
This is because the Intelligent Synchronous Switch of usually capacitor is put into voltage over zero, but due to total in actual motion
Have the deviation of 200us；And due to there is multiple groups capacitor in device, so being put into again when one group or more of capacitor investment
Capacitor shove be worth size depending on device entirety capacity of short circuit and switch zero crossing deviation.Capacitor is hindered in the moment of investment
It is anti-to can be approximated to be zero, then the connection copper wire impedance of every group of capacitor loop reforms into and puts into capacitor and shove size in device
Determinant.Shorter connection copper wire shoves bigger under identical capacity of short circuit.Pass through shoving more than the specified electricity in contact for contact
When flow valuve 2 times or more, contact will be sintered.Due in the biggish reactive power compensator of volume connect capacitor loop conducting wire compared with
It is long, so resistance is larger in capacitor loop, therefore it would not occur what the sintering of capacitor Intelligent Synchronous Switch contact can not separate
Phenomenon of the failure.
Based on above principle, the utility model selects the manganese copper alloy material of high resistivity to gush as gripping for capacitor loop
Resistance connects long electric wire for replacing, and has not only met the short connecting line length requirement that small size installation needs, but also meet capacitor
The requirement of circuit middle impedance value, and the needs by bulky capacitor electric current.In use, can be true according to specific capacitor loop demand
Surely the impedance and size for gushing resistance are gripped, to eliminate the phenomenon of the failure that the sintering of capacitor Intelligent Synchronous Switch contact can not separate, is made
With flexible.
Please refer to 1, the in-place reactive power compensation device that the utility model embodiment one provides, including cabinet body 1, nameplate 2, display
Screen 3, fixed connection terminal 5, grips that gush resistance 6, wiring junction box 7, cabinet partition 8, capacitor intelligently same at breaker of plastic casing 4
Walk switch 9, communicating circuit plate 10, plastics dug hand 11, connect guide rail 12, temperature controller 13, aerofoil fan 14, capacitor 15,
Capacitor support frame 16, discharger 17 and chassis backplane 18.
The multiple groups capacitor loop connecting with capacitor 15 is additionally provided in cabinet body 1, the connecting line of capacitor loop is copper-manganese conjunction
It is gripped made of golden material and gushes resistance 6.The impedance and the ruler that gush resistance 6 are gripped in use, can determine according to specific capacitor loop demand
It is very little, to eliminate the phenomenon of the failure that the sintering of 9 contact of capacitor Intelligent Synchronous Switch can not separate, it is easily installed, using flexible.
As shown in Figures 2 and 3, it grips and gushes resistance and primarily serve the effect shoved of containment, resistance value is 5 milliohms, and when work is high
Degree is 27 millimeters, and upper end projection length is 30 millimeters, and spread length is 120 millimeters, meets through 25A electric current and has 5 milliohms
Line impedance, be easily installed, cost is relatively low.
The present embodiment gushes resistance as gripping for capacitor loop by using the manganese copper alloy material of high resistivity, for replacing
Long electric wire is connected, has not only met the short connecting line length requirement that small size installation needs, but also meet capacitor loop middle impedance value
Requirement, and needs by bulky capacitor electric current.
Existing reactive compensation cabinet volume is too big (typically larger than 0.5 cubic metre), and occupied space is larger, and inconvenience is pacified on site
Dress.In-place reactive power compensation device provided in this embodiment concentrates on all components in cabinet body 1, and the volume of cabinet body 1 is less than
0.2 cubic metre, solves the small size structure that in-place reactive power compensation device optimizes under the conditions of multiloop a variety of combined capacities
Design problem.
Further, in in-place reactive power compensation device provided in this embodiment, the quantity of capacitor loop is 6, reactive capability
Configuration mode is flexible, and reactive compensation effect is good.
The promising product function performance that meets of institute can be required into required electric components, functional module using the utility model
Under the premise of meeting national standard, is connected with most compact mounting means combination, meet six circuit maximum 120kvar just
The requirement of ground reactive power compensator and in-site installation space less than 0.2 cubic metre saves a large amount of connection copper wire, to reduce
Device overall cost, and convenient for installing on the spot.
Since capacitor Intelligent Synchronous Switch usually has an investment interval time, generally all it is set as 3 minutes.Work as capacitor
Device puts into operation after middle excision, it is desirable to which investment progress reactive compensation needs to wait 3 minutes again.The reason is that capacitor fills
It is cut off again after electricity and has slow discharge time, when the discharge voltage of capacitor is only lower than definite value, relay contact both ends electricity
Pressing through zero point judgement could be accurate.Regulation capacitor internal will have discharge resistance in national standard, but cannot be too small, otherwise not be able to satisfy
Capacitor temperature increase requirement.Provide that capacitor discharge time cannot be greater than 3 minutes in national standard.But due in actual reactive compensation case
In example, power factor and reactive power period of change had many equipment at 5~180 seconds, such as mine elevator, oil extraction in oil field
Equipment, stamping equipment etc..So if after capacitor is cut off discharge time shorten within 3 seconds can meet it is more wide
General application demand, while being also contemplated that device power consumption when capacitor is put into and wanting small, discharge device temperature rise is less than 30K.
Capacitor discharge generallys use the resistive element mode in parallel with capacitor.When exchange 380V/50HZ voltage is added in electricity
When container both ends are charged, resistance also bears this alternating voltage simultaneously.After disconnecting alternating voltage, capacitor is put by resistance
Electricity, discharge time directly proportional to capacitor's capacity to the product of resistance.
Based on the above demand, the present embodiment is by installing discharger additional on the basis of capacitor, in capacitor plus exchange 380V/
When 50HZ voltage, the electric current passed through on the discharger element in parallel with capacitor is the smaller the better, so that the power of discharge device consumption
Also small, operating temperature can be low.And after disconnecting alternating voltage, capacitor is the bigger the better by the electric current that discharge device discharges, in this way
Discharge time will be short.
The utility model embodiment two high-impedance behavior that has while but being existed under 50 hertz of exchange using magnetic core coil
There is low-impedance characteristic under direct current, discharger of the discharge time less than 3 seconds is increased in traditional in-place reactive power compensation device,
It is located at interior of the cabinet, in parallel with capacitor.
Single discharger provided by the embodiment of the utility model can be constituted by inductance and with the concatenated resistance of inductance.It is real
Border using multiple dischargers composition combined discharge device with capacitor in use, can be used cooperatively.For example, 3 dischargers are used
One plastic housing and epoxy resin encapsulated are formed and are put with the Rapid Combination of three-phase compensation capacitor and three-phase separate-supplement capacitor matching
Electric appliance.In this way, the three-phase for matching various different size capacity can be made by the parameter and size for changing single discharger
The combined discharge device of capacitor will shorten within 1 second discharge time.Specific embodiment is as follows:
As an embodiment, the connection circuit of discharger and three-phase compensation capacitor is as shown in Figure 4: K1, K2 are
Capacitor Intelligent Synchronous Switch, LA+RA, LB+RB, LC+RC are respectively 3 identical dischargers, and it is total that C1, C2, C3 form three-phase
Capacitor is mended, in the process of K1, K2 switching capacitance, it is warm to connect in AC alternate discharger (17 degrees Celsius) work under normal temperature environment
Degree reaches 55 degrees Celsius, connects that operating temperature reaches 38 degrees Celsius under normal temperature environment in CB alternate discharger, connects alternate in AB
Discharger under normal temperature environment operating temperature reach 25 degrees Celsius, capacitor both ends discharge time is respectively less than 3 seconds.
As another embodiment, temperature when in order to make each discharger work is average, and single discharger
Maximum temperaturerise reduce, under the premise of not changing discharger quantity, the connection circuit of discharger and three-phase compensation capacitor is such as
Shown in Fig. 5: K1, K2 are capacitor Intelligent Synchronous Switch, and LA1+RA1, LA2+RA2, LC+RC are respectively 3 identical dischargers,
C1, C2, C3 form three-phase compensation capacitor, during K1, K2 switching capacitance, the discharger temperature difference of three same sizes
Mutation is small, connects that (17 degrees Celsius) operating temperature reaches 42 degrees Celsius under normal temperature environment in two AC alternate dischargers, connects
CB alternate discharger operating temperature under normal temperature environment reaches 44 degrees Celsius, and capacitor both ends discharge time is respectively less than 3 seconds.
Similarly, as shown in fig. 6, the identical discharger of three specifications shown in Fig. 4 is interconnected, one can be made into specially
Combined discharge device of the door to the three-phase separate-supplement capacitor repid discharge of synchronous switch switching；As shown in fig. 7, by shown in fig. 5 three
The identical discharger of a specification is interconnected by second of connection type, can be made into one and is dedicated for the three of synchronous switch switching
The combined discharge device of capacitor repid discharge is mutually mended altogether.
In-place reactive power compensation device provided by the embodiment of the utility model, based on the setting of above-mentioned discharger, reactive compensation
Response time is short, and for minimum continuous switching time interval up to 5 seconds, reactive compensation tracking response ability was strong.
In-place reactive power compensation device volume provided by the above embodiment is less than 0.2 cubic metre, and all components are in work
Heat is distributed as Shi Douhui, can thus make temperature in device housing higher.In general, capacitor is transported under 40 degree of environment temperatures
Internal temperature will reach 60 degree within row 3 hours or so, at this point, capacitor Intelligent Synchronous Switch will do it overheat protector, make capacitor
Device is out of service.
Based on this, with continued reference to Fig. 1, the utility model is added in in-place reactive power compensation device provided by the above embodiment
Temperature controller 13 and aerofoil fan 14, to carry out temperature control to capacitor 15.For example, when 15 temperature of capacitor is more than 45
When spending, capacitor Intelligent Synchronous Switch 9 measures this temperature, notifies temperature controller 13, temperature controller with rs485 communication modes
13 two aerofoil fans 14 of control work, and are radiated with air cooling way, so that the long-term work under 40 degree of environment temperatures of capacitor 15
When, internal temperature is no more than 60 degree, will not be out of service because of overheat protector.When 15 temperature of capacitor is lower than 40 degree, axis stream wind
Fan 14 stops working.Further enhance the temperature control capacity of device entirety, it is ensured that capacitor 15 runs without interruption for a long time, peace
Complete and effective realize is installed and used on the spot in load-side.
Particular embodiments described above has carried out into one the purpose of this utility model, technical scheme and beneficial effects
The detailed description of step, it should be understood that the foregoing is merely specific embodiment of the utility model, be not used to limit this reality
With novel protection scope.Particularly point out, to those skilled in the art, it is all the spirit and principles of the utility model it
Any modification, equivalent substitution, improvement and etc. that are interior, being done, should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of in-place reactive power compensation device, which is characterized in that connect including cabinet body, capacitor and with the capacitor more
Group capacitor loop；
The capacitor and the capacitor loop are arranged at the interior of the cabinet；
The connecting line of the capacitor loop is to grip to gush resistance made of manganese copper alloy material.
2. in-place reactive power compensation device according to claim 1, which is characterized in that the volume of the cabinet body is vertical less than 0.2
Square rice.
3. in-place reactive power compensation device according to claim 1, which is characterized in that it is described grip gush resistance resistance value be 5 milli
Europe.
4. in-place reactive power compensation device according to any one of claims 1 to 3, which is characterized in that the capacitor loop
Quantity is 6.
5. in-place reactive power compensation device according to claim 1, which is characterized in that further include discharge time less than 3 seconds
Discharger；
The discharger is located at the interior of the cabinet, in parallel with the capacitor.
6. in-place reactive power compensation device according to claim 5, which is characterized in that the discharger include inductance and with
The concatenated resistance of inductance.
7. in-place reactive power compensation device according to claim 5, which is characterized in that the capacitor is three-phase compensation capacitor
Device or three-phase separate-supplement capacitor.
8. in-place reactive power compensation device according to claim 5, which is characterized in that the discharger has 3；
3 dischargers are sequentially connected, and form the combined discharge device for three-phase separate-supplement capacitor discharge.
9. in-place reactive power compensation device according to claim 5, which is characterized in that the discharger has 3；
Two of them in 3 dischargers are parallel with one another, and connect with remaining one, and formation is put for three-phase compensation capacitor
The combined discharge device of electricity.
10. according to the described in any item in-place reactive power compensation devices of claim 5 to 9, which is characterized in that further include temperature control
Device and aerofoil fan；
The temperature controller and the aerofoil fan are located at the interior of the cabinet, and the temperature controller connects the axis stream wind
Fan；When the temperature of the capacitor is more than preset temperature threshold, the temperature controller controls the aerofoil fan to described
Capacitor cools down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720091394.5U CN209419226U (en) | 2017-01-24 | 2017-01-24 | In-place reactive power compensation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720091394.5U CN209419226U (en) | 2017-01-24 | 2017-01-24 | In-place reactive power compensation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209419226U true CN209419226U (en) | 2019-09-20 |
Family
ID=67928950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720091394.5U Active CN209419226U (en) | 2017-01-24 | 2017-01-24 | In-place reactive power compensation device |
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| Country | Link |
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| CN (1) | CN209419226U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655217A (en) * | 2017-01-24 | 2017-05-10 | 浙江南德电气有限公司 | In-situ reactive compensation device |
| CN106655216A (en) * | 2017-01-24 | 2017-05-10 | 浙江南德电气有限公司 | Local reactive power compensation device |
-
2017
- 2017-01-24 CN CN201720091394.5U patent/CN209419226U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655217A (en) * | 2017-01-24 | 2017-05-10 | 浙江南德电气有限公司 | In-situ reactive compensation device |
| CN106655216A (en) * | 2017-01-24 | 2017-05-10 | 浙江南德电气有限公司 | Local reactive power compensation device |
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| GR01 | Patent grant | ||
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| CP03 | Change of name, title or address |
Address after: Room 1103-1, 11th Floor, Building 1, Aoqiang Building, No. 6 Xiyuan Fifth Road, Sandun Town, Xihu District, Hangzhou City, Zhejiang Province, 310030 Patentee after: Zhejiang Nande Electric Group Co.,Ltd. Address before: 310000, 2nd and 3rd floors, Building B, Fuhua Building, No. 21, Sujiaba, Lubanqiao, Sandun Town, Xihu District, Hangzhou City, Zhejiang Province Patentee before: ZHEJIANG NANDA ELECTRICAL Co.,Ltd. |