CN203745860U - Ring main unit cable joint temperature monitoring system - Google Patents
Ring main unit cable joint temperature monitoring system Download PDFInfo
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- CN203745860U CN203745860U CN201320833876.5U CN201320833876U CN203745860U CN 203745860 U CN203745860 U CN 203745860U CN 201320833876 U CN201320833876 U CN 201320833876U CN 203745860 U CN203745860 U CN 203745860U
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 61
- 238000004891 communication Methods 0.000 claims description 32
- 238000009413 insulation Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 238000012545 processing Methods 0.000 description 15
- 238000000034 method Methods 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000009194 climbing Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000008520 organization Effects 0.000 description 2
- 238000004861 thermometry Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002977 hyperthermial effect Effects 0.000 description 1
- 238000003331 infrared imaging Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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Abstract
The utility model discloses a ring main unit cable joint temperature monitoring system, comprising a ring main unit cabinet which comprises a cable chamber, a switch chamber, a secondary routing chamber, a PT cabinet chamber, a distribution network automation chamber, a ring main unit distribution terminal, a temperature monitoring terminal, and a temperature sensor. In a temperature monitoring process, environment temperatures and cable joint temperatures in the ring main unit are respectively measured in real time and are transmitted to a digital signal processor in the temperature monitoring terminal; data is compensated and verified in certain degree so as to obtain a cable joint actual temperature rise rate to compare with the threshold values of a preset cable joint actual temperature rise rate. When the cable joint actual temperature rise rate exceeds the threshold values, the data signal controller generates alarm signals, allowing an alarm module to start alarm; meanwhile the data and states are sent to a remote main station, allowing the work personnel of the remote main station to respond rapidly to emergencies such as fire in the ring main unit, thereby cutting losses.
Description
Technical field
The utility model relates to a kind of supervisory system, relates in particular to a kind of temperature of cable junction supervisory system.
Background technology
Along with improving constantly of the economic sustained and rapid development of Chinese society and living standards of the people, power consumer is had higher requirement to power supply reliability, the quality of power supply and Supply Security.The domestic intelligent distribution network of nowadays wideling popularize develops rapidly, ring main unit can improve power supply reliability, the economy of power distribution network greatly as the main power equipment of intelligent distribution network, and reduce labour intensity, and raise the management level and service quality, promote the development of intelligent distribution network.The advantages such as that power cable has is durable in use, take up an area less, can lay under various occasions are used widely in electric system power transmission and distribution.But, its inside cable joint of ring main unit is because a variety of causes is easy to heating, the degree of heat will affect the security of operation of ring main unit self-operating and even whole electrical network, temperature of cable junction is too high can there is severe oxidation, cable is die-offed serviceable life, cause cable splice blast, insulation breakdown, burning etc., cause massive blackout and fire failure.
How better ring main unit inner cable joint to be carried out to effective real time and on line monitoring, to ensure the safe and reliable operation of the power equipments such as ring main unit, become the problem that everybody competitively studies.In order to realize real time on-line monitoring and the early warning to ring main unit inner cable joint, just need in ring main unit, increase temperature sensor cable splice is carried out to real time temperature monitoring.Domestic nowadays cable splice to be carried out to the method for temperature monitoring a lot, mainly contain in the thermometric wax disk(-sc) method of pasting, the outer infrared imaging method of cabinet, the outer infrared measurement of temperature method of cabinet, contact-sensing thermometry, optical fiber Surface Mount thermometry, cabinet infrared measurement of temperature method etc.But, these methods are just carried out real time on-line monitoring for the absolute temperature of cable splice, rely on the cable splice absolute temperature recording indirectly to judge degree of aging, insulation breakdown degree, current capacity size and the imminent potential safety hazard etc. of cable splice.If the cable splice kelvin rating recording exceedes design temperature high alarm setting value and produces alerting signal, this determination methods itself is insecure, can be with and serve false alarm and the problem of not reporting to the police.
For example, in ring main unit, residing environment temperature is 50 DEG C, and the temperature of cable junction higher limit arranging is 70 DEG C, reach 70 DEG C and produce and report to the police because exist certain load current to produce temperature that heating is easy to make cable splice in cable, now, current value does not reach the higher limit of setting electric current far away, and insulation breakdown does not occur cable can continue normal reliable operation.
Again for example, the temperature generation cataclysm of ring main unit cable splice, (5～10 seconds) rise to 60 DEG C by 20 DEG C in the short time, and larger variation does not occur environment temperature, and these temperature are all the time within the scope of alarm temperature and can not produce warning.And being cable splices, actual conditions probably there is ground connection or short trouble that insulation breakdown causes.The reason that produces these false alarms or do not report to the police is not consider two important amounts of impact: the one, and the residing environment temperature of cable splice; The 2nd, the climbing speed of cable splice itself and environment temperature.Thereby, to weigh in all directions the impact of two correlatives to the criterion of the judgement of cable splice reliability, monitoring and early warning, could carry out real time on-line monitoring to cable splice reliably.
Utility model content
The purpose of this utility model is to provide a kind of temperature monitoring system of ring main unit inner cable joint.
A kind of ring main unit temperature of cable junction of the utility model supervising device, comprises temperature of cable junction monitor terminal, temperature sensor, signal transmssion line, heating resistor, cooling fan etc.
Described monitoring temperature terminal comprises data acquisition module, data processing module, alarm module, communication module, display module and definite value setting module.
Described temperature sensor is connected with data processing module with the data acquisition module of monitoring temperature terminal by transmission line, the communication module of described monitoring temperature terminal is communicated by letter with long-range main station system by fieldbus or by wireless network, and described data processing module is connected by fieldbus with alarm module.
Described temperature sensor comprises the first temperature sensor and the second temperature sensor, described the first temperature sensor measurement cable splice environment absolute temperature around, and described the second temperature sensor is directly measured cable splice absolute temperature.
Described data acquisition module and data processing module can be arranged in digital signal controller, and described definite value setting module is definite value scrambler, and it is connected with the respective pin of digital signal controller.
Described communication module comprises local scene bus communication device and wireless network communication apparatus, and described local scene bus communication device can be RS485/232 communicator, and described wireless network communication apparatus can be wireless network transmitter.
Described monitoring temperature terminal also comprises High-Speed Coupled Device, described High-Speed Coupled Device is arranged between data processing module and described communication module, be arranged between described data processing module and described alarm module and display module, be also arranged between data processing module and ring main unit circuit controling switch.
Described alarm module is alarm, and described display module is display lamp or display screen.
A kind of ring main unit temperature of cable junction of the utility model supervisory system is arranged on ring main unit inside, and described ring main unit comprises cable vault, switch gear room, secondary cabling chamber, PT cabinet chamber, power distribution automation chamber, ring main unit distribution terminal, cable etc.
It is indoor that described ring main unit distribution terminal and monitoring temperature terminal are arranged on power distribution automation, and described the first temperature sensor is arranged in cable vault, and described the second temperature sensor is arranged on the position corresponding with cable splice.
Described data processing module is connected with the switch of ring main unit distribution terminal.
A method of carrying out temperature of cable junction monitoring according to ring main unit temperature of cable junction supervisory system of the present utility model, the steps include:
By infrared temperature-test sensor in ring main unit, the absolute temperature of ring main unit inner cable joint is carried out to temperature real time on-line monitoring, and the value recording is sent to the digital signal controller of monitoring temperature terminal;
By the temperature sensor being installed in ring main unit, the environment absolute temperature in ring main unit is carried out to real time on-line monitoring, and the value recording is sent to the digital signal controller of monitoring temperature terminal;
Monitoring temperature terminal obtains cable splice absolute temperature and two temperature of environment absolute temperature of synchronization, carries out temperature comparison, obtains the relative temperature of cable splice;
Monitoring temperature terminal to a period of time inner cable joint absolute temperature compare, calculate, analyze, draw the absolute temperature rise rate of cable splice, absolute temperature in the same time section of environment temperature is compared, calculates, analyzed, draw the absolute temperature rise rate of environment;
The relative temperature of a period of time inner cable joint is compared calculating by the digital signal controller of monitoring temperature terminal, draws the relative temperature rise rate v1 of cable splice;
Absolute the environment of synchronization temperature rise rate and the absolute temperature rise rate of cable splice are compared calculating by the digital signal controller of monitoring temperature terminal, draws the relative temperature rise rate v2 of cable splice;
Described digital signal controller by relative the cable splice calculating temperature rise rate v1 compensate with relative temperature rise rate v2, verification, obtain the relative temperature rise rate v0 of actual cable;
According to cable splice relative temperature and relative temperature rise rate v0, relative temperature and temperature rise rate threshold values are set on definite value scrambler, and send digital signal controller to.When cable splice relative temperature or when relatively temperature rise rate v0 exceedes the upper limit threshold values setting, produce alerting signal, send to alarm lamp or emergency alarm bell by digital signal controller, and produce fan control signal, lower the temperature to cable cabinet.
When cable splice relative temperature or when relatively temperature rise rate v0 exceedes maximum threshold values, digital signal controller sends divide-shut brake order to ring main unit, makes ring main unit power-off, to ensure device security.
Each data and instruction, all send communication module to by digital signal controller above, then send long-range main website to by communication module, by main website, equipment monitored, and assigns if desired steering order.
Described steering order sends to communication module by main website, and communication module sends instruction to digital signal controller again, by it, distribution terminal relevant device is controlled.
The utility model is taked environment temperature monitoring and the relative temperature of cable splice and environment and the intelligent temperature monitoring method that relative temperature climbing speed combines in temperature of cable junction monitoring, ring main unit, the concept that proposes ring main unit inner cable joint relative temperature and relative temperature rise rate, provides a kind of novel ring main unit temperature of cable junction monitor terminal.
Carry out rational prejudgementing criteria analysis by the relative temperature value to cable splice, relative temperature rise rate value, can carry out more reliable on-line monitoring and early warning in real time to ring main unit temperature of cable junction state, simultaneously can be according to temperature conditions control cooling fan or heating resistor, take even if desired ring main unit to carry out divide-shut brake control, to ensure the safety of equipment and the reliability of power supply.
Brief description of the drawings
Fig. 1 is monitoring temperature terminal mounting structure schematic diagram of the present utility model;
Fig. 2 is entire system Organization Chart of the present utility model;
Fig. 3 is hardware principle block diagram of the present utility model;
Fig. 4 is flow chart of data processing figure of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail:
Fig. 1 is the monitoring temperature terminal mounting structure schematic diagram of the utility model embodiment, monitoring temperature terminal is arranged in a ring main unit, ring main unit is a cabinet, and cabinet comprises cable vault 1, switch gear room 2, secondary cabling chamber 3, PT power cabinet 4, power distribution automation chamber 5.In power distribution automation chamber 5, be provided with distribution terminal 6 and monitoring temperature terminal 7.Cable vault is positioned at ring main unit bottom, has multiplely, and there are cable splice 8 and sensor in its inside.
Ring main unit body: ring main unit is taked the common box type structure of isolating switch, lower load cell, the sealing stainless steel casing of outfit all insulation, built-in SF gas, the rugged surroundings that can bear humidity, rocky many dirt.
Switch gear room 2: have multiplely, be positioned at cable vault top, be provided with the switchgear of ring main unit.
Secondary cabling chamber 3: be positioned at ring main unit top, top, switch gear room, the cabling of ring main unit secondary rack and sensor and monitoring temperature terminal all connects up by secondary cabling chamber 3.
PT power cabinet 4: the part of ring main unit secondary power supply disposes separately a PT cabinet; PT cabinet can be taked the mode of duplex feeding; can obtain power supply from two-way inlet wire; and there is back-up source, to guarantee that ring main unit can continually provide reliable power supply to monitoring temperature terminal and ring main unit distribution terminal.
Power distribution automation chamber 5: the indoor distribution terminal 6 that is provided with monitoring temperature terminal 7 and ring main unit of power distribution automation, also comprises communication module, for communicating with substation or main website.
Distribution terminal 6: be used to the power supply of monitoring temperature terminal.
Monitoring temperature terminal 7: data acquisition module, data processing module, alarm module, communication module, display module and definite value setting module, not shown in the drawings.
The first temperature sensor 9: for being installed on the infrared temperature-test sensor in the cable vault of high-pressure side, keep suitable distance with cable splice, measure the kelvin rating of cable splice 8.More than in 10kV and 35kV ring main unit, probe should remain on 40mm from the distance of cable splice, therefore the distance coefficient of infrared temperature probe should be 10:1 than minimum, can adopt the infrared temperature-test sensor of TN9 series, temperature-measuring range is-30 DEG C～+ 275 DEG C, and precision is 0.1 DEG C.
The second temperature temperature sensor 10: be installed in the cable vault of high-pressure side, far away apart from cable splice, for measuring the absolute environment temperature in cable vault, and send the value recording to monitoring temperature terminal.Can adopt serial SHT10 temperature sensor, measuring temperature range is-45 DEG C～275 DEG C, and precision is 0.1 DEG C.
The first temperature temperature sensor 9 is connected with data processing module with the data acquisition module of monitoring temperature terminal 7 by transmission line with the second temperature sensor 10, the communication module of monitoring temperature terminal 7 is by fieldbus or by wireless network and long-range master station communication, described data processing module is connected by fieldbus with alarm module.
Fig. 2 is the entire system Organization Chart of the utility model embodiment, and multiple ring main units are by communication network and master station communication.In each ring main unit, temperature of cable junction monitoring sensor and environment temperature monitoring sensor send measured data to monitoring temperature terminal, monitoring temperature terminal sends data to main website by communication network, in the time that data exceed limit value, reports to the police and temperature control modules action.
Fig. 3 is the hardware principle block diagram of the utility model embodiment.
The first temperature sensor 9 in ring main unit cable vault 1 and the second temperature sensor 10 are measured respectively cable vault's environment temperature and cable splice 8 temperature, and the two is connected with the digital signal controller of monitoring temperature terminal 7; Definite value scrambler in monitoring temperature terminal 7 is connected with digital signal controller; Communication module, alarm module, display module are connected with respectively photo-coupler, and the other end of photo-coupler is connected to digital signal controller; Digital signal controller is also connected with the switch of ring main unit distribution terminal 10, and is in series with photo-coupler between the two.
The first temperature sensor 9 and the second temperature sensor 10 are respectively cable splice temperature probe, environment temperature sensor, the two value recording sends digital signal controller to as analog signals, definite value scrambler input value is recorded by the digital signal controller of distribution terminal, and as input quantity, supply digital signal controller as criterion.Communication module is connected with digital signal controller by field bus protocol, meanwhile, carries out real-time communication by fieldbus or wireless network and backstage main station system.The control signal of digital signal controller output acts on killer switch, fan or the heating resistor of ring main unit, is respectively used to make ring main unit to carry out breaking-closing operating, cooling processing or hyperthermic treatment.Controlling alarm, the state display control signal of digital signal controller act on respectively alarm module and data disaply moudle.Wherein, between digital signal controller and alarm module, looped network cabinet switch and communication module, be connected by photo-coupler respectively, to ensure that data are accurate.The alarm that alarm module adopts can comprise buzzing warning, sound and light alarm, and data disaply moudle comprises LED state pilot lamp, LCD LCDs etc.
Fig. 4 is the flow chart of data processing figure that utilizes temperature of cable junction method for supervising of the present utility model, result is using the relative temperature of cable splice and the criterion of relative temperature rise rate as cable monitoring running state, realizes temperature monitoring and the control of ring main unit cable splice.
In practical application, the digital signal controller of distribution terminal adopts the DSC chip that model is STM32f407VG; The internal resource of chip is a lot, and memory capacity is large, low price, and ARM chip has wireless communication interface, ethernet interface simultaneously, also can produce PWM ripple, can fast processing and output analog quantity, digital quantity, control signal, alerting signal etc.Control signal, alerting signal output are increased to TLP112 light-coupled isolation, ensure stability and the anti-interference of output signal.Take the communication module of grand electric H7710 series, monitor terminal can, by swap data between GPRS communication mode and main website, can send to user mobile phone alerting signal by gsm communication mode again, has the local communication of RS232/RS485 and maintenance interface simultaneously.
Above embodiment is described preferred implementation of the present utility model; not scope of the present utility model is limited; do not departing under the prerequisite of the utility model design spirit; various distortion and improvement that the common engineering technical personnel in this area make the technical solution of the utility model, all should fall into the definite protection domain of claims of the present utility model.
Claims (5)
1. a ring main unit temperature of cable junction supervisory system, comprise ring main unit, described ring main unit comprises cable vault (1), switch gear room (2), secondary cabling chamber (3), PT power cabinet (4), power distribution automation chamber (5), in described power distribution automation chamber (5), be provided with distribution terminal (6) and monitoring temperature terminal (7), described cable vault (1) is positioned at ring main unit bottom, have multiplely, there are cable splice (8) and sensor in its inside;
Described ring main unit is taked the common box type structure of isolating switch, lower load cell, is equipped with the sealing stainless steel casing of all insulation, built-in SF gas;
Described switch gear room (2) is positioned at top, cable vault, is provided with the switchgear of ring main unit;
Described secondary cabling chamber (3) is positioned at ring main unit top, top, switch gear room, and the cabling of ring main unit secondary rack and sensor and monitoring temperature terminal all connects up by secondary cabling chamber (3);
It is characterized in that, also comprise long-range main website;
Described monitoring temperature terminal (7) comprises digital signal controller and alarm module;
Described temperature sensor is arranged in cable vault, and is connected with monitoring temperature terminal (7) by signal transmssion line;
Described monitoring temperature terminal (7) intercoms mutually with long-range main website;
Described monitoring temperature terminal (7) is connected with described alarm module.
2. ring main unit temperature of cable junction supervisory system according to claim 1, is characterized in that,
Described temperature sensor comprises the first temperature sensor (9) and the second temperature sensor (10), described the first temperature sensor (9) is measured cable splice absolute temperature, and described the second temperature sensor (10) is measured ring main unit cable indoor environment absolute temperature;
Described monitoring temperature terminal (7) and described ring main unit distribution terminal (6) are arranged in distribution automation chamber (5);
Described monitoring temperature terminal (7) is by fieldbus or by wireless network and long-range master station communication;
Described monitoring temperature terminal (7) is connected by fieldbus with alarm module;
Described monitoring temperature terminal (7) also comprises wireless network transmission module and display module.
3. ring main unit temperature of cable junction supervisory system according to claim 2, is characterized in that,
Also comprise definite value scrambler, photo-coupler;
Between the digital signal controller of described distribution terminal (6) and described alarm module, described display module, described communication module, be provided with photo-coupler.
4. ring main unit temperature of cable junction supervisory system according to claim 3, is characterized in that, described communication module comprises wireless network transmitter and RS232/485 field-bus interface.
5. ring main unit temperature of cable junction supervisory system according to claim 3, is characterized in that, described alarm module is alarm, and described display module is display screen;
It is the DSC chip of STM32f407VG that described digital signal controller can adopt model;
Described communication module can adopt H7710 series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320833876.5U CN203745860U (en) | 2013-12-17 | 2013-12-17 | Ring main unit cable joint temperature monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320833876.5U CN203745860U (en) | 2013-12-17 | 2013-12-17 | Ring main unit cable joint temperature monitoring system |
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| CN203745860U true CN203745860U (en) | 2014-07-30 |
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| CN201320833876.5U Expired - Lifetime CN203745860U (en) | 2013-12-17 | 2013-12-17 | Ring main unit cable joint temperature monitoring system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103676888A (en) * | 2013-12-17 | 2014-03-26 | 北京合锐赛尔电力科技有限公司 | System and method for monitoring ring main unit cable joint temperature |
| CN106019070A (en) * | 2016-07-05 | 2016-10-12 | 贵州电网有限责任公司电力科学研究院 | On-line monitoring device and monitoring method for working state of copper-aluminum composite connection terminal |
| CN107394750A (en) * | 2017-06-21 | 2017-11-24 | 合肥远见电力科技有限公司 | A kind of intelligent Bus monitoring system based on temperature anomaly detection |
| CN108344930A (en) * | 2018-01-31 | 2018-07-31 | 国家电网公司 | A kind of monitoring device and method of ring main unit temperature and shelf depreciation |
| CN109916523A (en) * | 2019-02-27 | 2019-06-21 | 南京乾鑫电器设备有限公司 | A kind of switchgear cable vault heating accident monitors system and method |
| CN110598881A (en) * | 2019-09-27 | 2019-12-20 | 国网山东省电力公司临清市供电公司 | Intelligent operation and maintenance management system of ring main unit |
-
2013
- 2013-12-17 CN CN201320833876.5U patent/CN203745860U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103676888A (en) * | 2013-12-17 | 2014-03-26 | 北京合锐赛尔电力科技有限公司 | System and method for monitoring ring main unit cable joint temperature |
| CN106019070A (en) * | 2016-07-05 | 2016-10-12 | 贵州电网有限责任公司电力科学研究院 | On-line monitoring device and monitoring method for working state of copper-aluminum composite connection terminal |
| CN106019070B (en) * | 2016-07-05 | 2018-12-07 | 贵州电网有限责任公司电力科学研究院 | A kind of copper-aluminium transition connection terminal working condition on-Line Monitor Device and monitoring method |
| CN107394750A (en) * | 2017-06-21 | 2017-11-24 | 合肥远见电力科技有限公司 | A kind of intelligent Bus monitoring system based on temperature anomaly detection |
| CN107394750B (en) * | 2017-06-21 | 2019-05-21 | 合肥远见电力科技有限公司 | A kind of intelligent Bus monitoring system based on temperature anomaly detection |
| CN108344930A (en) * | 2018-01-31 | 2018-07-31 | 国家电网公司 | A kind of monitoring device and method of ring main unit temperature and shelf depreciation |
| CN108344930B (en) * | 2018-01-31 | 2020-03-17 | 国家电网公司 | Device and method for monitoring temperature and partial discharge of ring main unit |
| CN109916523A (en) * | 2019-02-27 | 2019-06-21 | 南京乾鑫电器设备有限公司 | A kind of switchgear cable vault heating accident monitors system and method |
| CN110598881A (en) * | 2019-09-27 | 2019-12-20 | 国网山东省电力公司临清市供电公司 | Intelligent operation and maintenance management system of ring main unit |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: BEIJING HERUI SEL POWER TECHNOLOGY CO., LTD. Free format text: FORMER NAME: BEIJING HERUI SEL POWER SCIENCE + TECHNOLOGY CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |
Address after: Advantech No. 7 building, 100085 Beijing city Haidian District on the street 5 Patentee after: BEIJING HEROSAIL POWER SCI & TECH Co.,Ltd. Address before: Advantech No. 7 building, 100085 Beijing city Haidian District on the street 5 Patentee before: BEIJING HERUI SEL POWER SCI. & TECH. Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140730 |