CN105158600A - Intelligent power acquisition module for power distribution cabinet - Google Patents
Intelligent power acquisition module for power distribution cabinet Download PDFInfo
- Publication number
- CN105158600A CN105158600A CN201510509750.6A CN201510509750A CN105158600A CN 105158600 A CN105158600 A CN 105158600A CN 201510509750 A CN201510509750 A CN 201510509750A CN 105158600 A CN105158600 A CN 105158600A
- Authority
- CN
- China
- Prior art keywords
- circuit
- voltage
- power
- acquisition module
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000009826 distribution Methods 0.000 title claims abstract description 16
- 238000012545 processing Methods 0.000 claims abstract description 26
- 238000004891 communication Methods 0.000 claims abstract description 23
- 238000005070 sampling Methods 0.000 claims abstract description 9
- 230000006698 induction Effects 0.000 claims abstract description 7
- 230000004044 response Effects 0.000 claims abstract description 5
- 230000002452 interceptive effect Effects 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 4
- 230000003993 interaction Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000006837 decompression Effects 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 230000005611 electricity Effects 0.000 abstract description 8
- 238000012544 monitoring process Methods 0.000 abstract description 7
- 238000009434 installation Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 abstract description 2
- 238000004134 energy conservation Methods 0.000 abstract 1
- 238000005265 energy consumption Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 238000001467 acupuncture Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000005355 Hall effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- Y02B60/50—
Landscapes
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention relates to an intelligent power acquisition module for a power distribution cabinet. The intelligent power acquisition module is characterized in that voltage and current signals of a module structural component 1 are led into an acquisition module; the module structural component 1 includes a switching power source circuit 2, an alternating current sampling metering circuit 3, a core processing circuit 4 and a micro power wireless communication circuit 5. The intelligent power acquisition module has the advantages of small size, light weight, low cost, easiness in installation and the like. According to the intelligent power acquisition module of the invention, measurement of voltage, current and power of a power distribution loop can be realized through induction and wireless modes, and the electricity utilization information and electric energy quality of an electricity utilization loop can be effectively monitored, and therefore, fine electricity utilization management and demand side response can be realized, and orderly electricity utilization, energy conservation and consumption reduction can be realized, and large-scale promotion of energy efficiency monitoring can be possible.
Description
Technical field
What the present invention designed is a kind of intelligent electric power acquisition module for power distribution cabinet, belongs to energy efficiency monitoring technical field.
Background technology
In order to realize the become more meticulous management of power use and Demand Side Response, reaching ordered electric and energy-saving and cost-reducing object, by electric unit except to except the monitoring of total electricity consumption loop, also needing to expand to and each branch's electricity consumption loop is monitored.Prior art generally adopts and install the equipment such as current transformer, collector, communication module additional in each duplexure, realizes each power information in electricity consumption loop and the monitoring of the quality of power supply.
Current transformer in conventional electric power system (is commonly referred to as instrument transformer by a mutual inductor and secondary mutual inductor, be contained in collector) composition, volume is large, cost is high, installs difficulty by in-site installation space constraint, and even some duplexure needs transformation to install; Many with the duplexure of electric unit, every loop all needs the equipment such as access current transformer, collector, communication module, and equipment cost is high; In addition collector needs to access voltage signal from each branch road in scene, will carry out power failure operation during installation, impacts to the production by electric unit, operation; Because access cable is many, the wiring of specialty to be carried out during construction, installation difficulty and workload is large, executive cost is high, long construction period.
Summary of the invention
The present invention proposes a kind of intelligent electric power acquisition module for power distribution cabinet, be intended to the above-mentioned defect overcome existing for prior art, realize the fusion of traditional primary current mutual inductor and secondary current mutual inductor, on the impact of electricity consumption production of units operation nothing in installation process.
Technical solution of the present invention: for the intelligent electric power acquisition module of power distribution cabinet, is characterized in that the voltage and current signal of modular structure part 1 introduces acquisition module; Described modular structure part 1 comprises switching power circuit 2, hands over and adopt metering circuit 3, core processing circuit 4, micro power radio communication circuit 5; Wherein the signal output part of switching power circuit 2 connects with the signal input part of core processing circuit 4, first signal input/output terminal of core processing circuit 4 connects with handing over the signal input/output end adopting metering circuit 3, and the secondary signal input/output terminal of core processing circuit 4 connects with the signal input/output end of micro power radio communication circuit 5; Described modular structure part 1, when power cable not power-off, module to be installed on cable and to be that acquisition module is powered by acupuncture power taking, tested voltage and current signal is introduced in acquisition module simultaneously, when therefore module is installed, loss of outage can not be brought to user.
Advantage of the present invention: by the mode of measurement of inductance, direct measure field hundreds of ampere big current is made to become possibility, without the need to repeatedly being converted by the signal of secondary current mutual inductor by sampling front-end, while reducing costs, greatly reduce on-the-spot wiring complexity.Module has the features such as volume is little, lightweight, cost is low, easy installation, by monitoring the power information of power circuit and the quality of power supply, thus realize becoming more meticulous the management of power use and Demand Side Response, reach ordered electric and energy-saving and cost-reducing object, make large-scale promotion energy efficiency monitoring become possibility.
Accompanying drawing illustrates:
Fig. 1 is intelligent electric power acquisition module structured flowchart
Fig. 2 is switching power circuit schematic diagram
Fig. 3 is that metering circuit schematic diagram is adopted in friendship
Fig. 4 is core processing circuit schematic diagram
Fig. 5 is micro power radio communication circuit theory diagrams
Embodiment:
Contrast accompanying drawing 1, for the intelligent electric power acquisition module of power distribution cabinet, its structure is that the voltage and current signal of modular structure part 1 introduces acquisition module; Described modular structure part 1 comprises switching power circuit 2, hands over and adopt metering circuit 3, core processing circuit 4, micro power radio communication circuit 5; Wherein the signal output part of switching power circuit 2 connects with the signal input part of core processing circuit 4, first signal input/output terminal of core processing circuit 4 connects with handing over the signal input/output end adopting metering circuit 3, and the secondary signal input/output terminal of core processing circuit 4 connects with the signal input/output end of micro power radio communication circuit 5; Described modular structure part 1, to be installed to module when power cable not power-off on cable and to be that acquisition module is powered by acupuncture power taking, tested voltage and current signal is introduced gathering mould simultaneously
In block, when therefore module is installed, loss of outage can not be brought to user.
Described switching power circuit 2, adopt copped wave mapping mode 220V alternating voltage to be converted to 3.3V direct current and export, this scheme topological structure is simple, and components and parts are few, and cloth board space is little, can realize AC/DC conversion under the prerequisite of low cost, small size.
Metering circuit 3 is adopted in described friendship, the voltage that can gather connection circuit also realizes the electric current metering of distribution line by the mode of induction indirectly, direct measure field hundreds of ampere big current is made to become possibility, without the need to repeatedly being converted by the signal of secondary current mutual inductor by sampling front-end, while reducing costs, greatly reduce on-the-spot wiring complexity.
Described core processing circuit 4, the electric current and voltage that metering circuit 3 can be gathered carries out process in real time and calculates the power of test line and the power consumption information of Different periods, and can carry out electric energy quality monitoring to distribution line.
Described micro power radio communication circuit 5, can realize the command interaction between acquisition module and electrical gateway and data communication.
Technical scheme of the present invention is further described below in conjunction with accompanying drawing:
Contrast accompanying drawing 1, switching power circuit 2 realizes input voltage to be converted to system works power supply, hand over and adopt metering circuit 3 and to achieve a butt joint the metering of line line voltage distribution electric current and power, core processing circuit 4 realizes systemic-function and configures and play coordination, control to hand over the effect of metering circuit 3 and micro power radio communication circuit 5 of adopting, and micro power radio communication circuit 5 then realizes the communication function between acquisition module and electrical gateway.
Contrast accompanying drawing 2, Switching Power Supply is made up of current rectifying and wave filtering circuit, decompression converting circuit and DC/DC circuit.220V ac voltage signal is introduced [2-interactive interface 1] place by modular structure part 1, the 220V AC-input voltage of input is converted to pulsating dc voltage by current rectifying and wave filtering circuit, the DC voltage that rectification goes out is about 1.4 times of input ac voltage effective value, D3 is the switch chip of withstand voltage 650V, under the cooperation of peripheral circuit, high voltage direct current is converted to 12V DC voltage, D5 is the DC/DC chip of input voltage 28V, realizes 12V DC voltage being converted to 3.3V and is exported as system provides working power by [2-interactive interface 2].
Contrast accompanying drawing 3, friendship is adopted metering circuit and is made up of voltage sample circuit, current sampling circuit and computation chip.Hand over [the 3-interactive interface 1] of adopting metering circuit in parallel with [the 2-interactive interface 1] of switching power circuit, voltage sample circuit adopts the mode of electric resistance partial pressure to realize 220V AC signal being converted to the 220mV AC signal meeting computation chip input range; Divider resistance adopts the object of 5 to be that raising is withstand voltage, and when preventing there are the fluctuations such as surge at input end, sample resistance burns out.Current sampling circuit adopts the mode sampling current signal of induction indirectly: in modular structure part, toroidal core is housed, when module is installed, electric power cable to be measured passes from magnetic core, magnetic core is open type (cutting off from centre), and Hall chip D2, D3 are arranged on the opening part of toroidal core; When the cable in magnetic core is by alternating current, magnetic core induces the magnetic field of alternation, and then Hall chip induces the voltage signal of alternation, and input computation chip D5 after being amplified by operational amplifier D1 by this signal, current signal has sampled.Computation chip realizes the voltage of input, current signal collection calculate corresponding meritorious, reactive power, and computation chip carries out data interaction and command response by [3-interactive interface 2] and core processing circuit 4.
Contrast accompanying drawing 4, core processing circuit is made up of single-chip microcomputer D1, storage chip D2, watchdog chip D4 and LED light.Single-chip microcomputer D1 is acquisition module and core, realizes acquisition module functional configuration and overall coordinated management.The operating voltage of core processing circuit 4 is 3.3V, and adopting metering circuit 2 by friendship is provided by [2-interactive interface 2]; Core processing circuit 4 adopts metering module 3 by [4 interactive interface 2] and [4 interactive interface 2] for friendship and micropower wireless communication module 5 provides power supply and interactive signal.The address of storage chip D2 storage of collected module and the information about power of collection, the effect of watchdog chip D4 is rear to system reset in single-chip microcomputer D1 deadlock, ensures that acquisition module there will not be long-time deadlock situation.The duty of the LED light energy indicating module of module, and existing i.e. module power taking success after pilot lamp is bright when mounted, without the need to carrying out power operation to electric power cable, avoid causing loss of outage to user.
Contrast accompanying drawing 5, micro power radio communication circuit is made up of radio frequency chip D6 and RF transmit-receive circuit.Communication between acquisition module with electrical gateway relies on micro power radio communication circuit 5 to realize: communicated by [5 interactive interface 1] between core processing circuit 4 with micro power radio communication circuit 5, radio frequency chip D6 carries out modulation and demodulation to the signal of air transmission, and RF transmit-receive circuit then completes transmitting-receiving and the filtration of out-of-band signal of data.
According to electromagnetic induction theorem, time in electric power cable by alternating current, around will produce alternating magnetic field, the electric current passed through in induction level and cable is directly proportional; By cable through toroidal core, then the magnetic induction density in magnetic core is directly proportional to the electric current in cable, measures the field intensity in magnetic core, can calculate the size of current passed through in cable; Utilize Hall effect, cut by toroidal core, put into Hall chip at section part, the output voltage of Hall chip is directly proportional to the magnetic induction density in magnetic core.Therefore measure Hall chip output voltage, the size of current passed through in cable can be calculated.
Claims (5)
1., for the intelligent electric power acquisition module of power distribution cabinet, it is characterized in that the voltage and current signal of modular structure part introduces acquisition module; Described modular structure part comprises switching power circuit, hands over and adopt metering circuit, core processing circuit, micro power radio communication circuit; Wherein the signal output part of switching power circuit connects with the signal input part of core processing circuit, first signal input/output terminal of core processing circuit connects with handing over the signal input/output end adopting metering circuit, and the secondary signal input/output terminal of core processing circuit connects with the signal input/output end of micro power radio communication circuit.
2. according to claim 1 for the intelligent electric power acquisition module of power distribution cabinet, it is characterized in that described Switching Power Supply is by current rectifying and wave filtering circuit, decompression converting circuit and DC/DC circuit composition, 220V ac voltage signal is introduced 2-interactive interface 1 place by modular structure part 1, the 220V AC-input voltage of input is converted to pulsating dc voltage by current rectifying and wave filtering circuit, the DC voltage that rectification goes out is 1.4 times of input ac voltage effective value, the switch chip of withstand voltage 650V, under the cooperation of peripheral circuit, high voltage direct current is converted to 12V DC voltage, the DC/DC chip of input voltage 28V, realize that 12V DC voltage is converted to 3.3V to be exported as system provides working power by 2-interactive interface 2.
3. according to claim 1 for the intelligent electric power acquisition module of power distribution cabinet, it is characterized in that described friendship is adopted metering circuit and is made up of voltage sample circuit, current sampling circuit and computation chip, hand over the 3-interactive interface 1 adopting metering circuit in parallel with the 2-interactive interface 1 of switching power circuit, voltage sample circuit adopts the mode of electric resistance partial pressure to realize 220V AC signal being converted to the 220mV AC signal meeting computation chip input range; Current sampling circuit adopts the mode sampling current signal of induction indirectly: in modular structure part, toroidal core is housed, when module is installed, electric power cable to be measured passes from magnetic core, magnetic core is that namely open type is cut off from centre, and two Hall chips are arranged on the opening part of toroidal core; When the cable in magnetic core is by alternating current, magnetic core induces the magnetic field of alternation, and then Hall chip induces the voltage signal of alternation, computation chip is inputted after being amplified by operational amplifier by this signal, current signal has sampled, computation chip realizes the voltage of input, current signal collection calculate corresponding meritorious, reactive power, and computation chip carries out data interaction and command response by 3-interactive interface 2 and core processing circuit.
4. according to claim 1 for the intelligent electric power acquisition module of power distribution cabinet, it is characterized in that described core processing circuit is made up of single-chip microcomputer, storage chip, watchdog chip and LED light, wherein single-chip microcomputer is acquisition module and core, realize acquisition module functional configuration and overall coordinated management, the operating voltage of core processing circuit is 3.3V, and adopting metering circuit by friendship is provided by 2-interactive interface; Core processing circuit adopts metering module and micropower wireless communication module provides power supply and interactive signal by 4 interactive interface 2 and 4 interactive interfaces 2 for handing over.
5. according to claim 1 for the intelligent electric power acquisition module of power distribution cabinet, it is characterized in that described micro power radio communication circuit is made up of radio frequency chip and RF transmit-receive circuit, micro power radio communication circuit is communicated by 5 interactive interfaces 1 with between core processing circuit, radio frequency chip carries out modulation and demodulation to the signal of air transmission, and RF transmit-receive circuit then completes transmitting-receiving and the filtration of out-of-band signal of data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510509750.6A CN105158600A (en) | 2015-08-19 | 2015-08-19 | Intelligent power acquisition module for power distribution cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510509750.6A CN105158600A (en) | 2015-08-19 | 2015-08-19 | Intelligent power acquisition module for power distribution cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105158600A true CN105158600A (en) | 2015-12-16 |
Family
ID=54799520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510509750.6A Pending CN105158600A (en) | 2015-08-19 | 2015-08-19 | Intelligent power acquisition module for power distribution cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105158600A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107276231A (en) * | 2017-07-20 | 2017-10-20 | 南京新联电能云服务有限公司 | A kind of electric energy efficiency monitoring terminal of modularized design |
| CN108628198A (en) * | 2017-03-16 | 2018-10-09 | 常州市小先信息技术有限公司 | Intelligent metering socket system and its control method based on Android application |
| CN109387719A (en) * | 2018-12-10 | 2019-02-26 | 湖南金天钛业科技有限公司 | A kind of DC water cooled cable use state detection device and detection method |
| CN111190099A (en) * | 2020-02-28 | 2020-05-22 | 上海良信电器股份有限公司 | Monitoring module and fuse circuit breaker |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000341882A (en) * | 1999-05-31 | 2000-12-08 | Fuji Electric Co Ltd | Data collection device in power system |
| CN1547034A (en) * | 2003-11-29 | 2004-11-17 | 华中科技大学 | a current sensor |
| CN1547035A (en) * | 2003-12-12 | 2004-11-17 | 华中科技大学 | a current sensor |
| CN201036160Y (en) * | 2007-02-02 | 2008-03-12 | 湖北盛佳电器设备有限公司 | Feed-through current transformer using puncture method to obtain voltage from cladded conductor |
| CN201522517U (en) * | 2009-11-03 | 2010-07-07 | 广东电网公司电力科学研究院 | Opening-type Hall current sensor |
| CN201594464U (en) * | 2009-10-21 | 2010-09-29 | 江苏省电力公司南京供电公司 | Through-the-heart anti-theft combined low-voltage transformer |
| CN102313833A (en) * | 2011-07-22 | 2012-01-11 | 四川省电力公司达州电业局 | Voltage signal collector |
| CN202421324U (en) * | 2011-10-18 | 2012-09-05 | 中国电力科学研究院 | Basic electric quantity type efficiency data acquisition terminal |
| CN202693649U (en) * | 2012-05-04 | 2013-01-23 | 上海协同科技股份有限公司 | Electricity theft preventing system |
| CN103149431A (en) * | 2013-03-19 | 2013-06-12 | 青岛乾程电子科技有限公司 | Multifunction watt-hour meter |
| GB2513197A (en) * | 2013-04-19 | 2014-10-22 | Dale Read | Energy reporting unit |
| CN204439709U (en) * | 2014-03-13 | 2015-07-01 | 达州市远东电器有限公司 | A kind of information collecting device of electricity load management terminal |
| CN205080201U (en) * | 2015-08-19 | 2016-03-09 | 南京新联电子股份有限公司 | A intelligent electric power collection module for switch board |
-
2015
- 2015-08-19 CN CN201510509750.6A patent/CN105158600A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000341882A (en) * | 1999-05-31 | 2000-12-08 | Fuji Electric Co Ltd | Data collection device in power system |
| CN1547034A (en) * | 2003-11-29 | 2004-11-17 | 华中科技大学 | a current sensor |
| CN1547035A (en) * | 2003-12-12 | 2004-11-17 | 华中科技大学 | a current sensor |
| CN201036160Y (en) * | 2007-02-02 | 2008-03-12 | 湖北盛佳电器设备有限公司 | Feed-through current transformer using puncture method to obtain voltage from cladded conductor |
| CN201594464U (en) * | 2009-10-21 | 2010-09-29 | 江苏省电力公司南京供电公司 | Through-the-heart anti-theft combined low-voltage transformer |
| CN201522517U (en) * | 2009-11-03 | 2010-07-07 | 广东电网公司电力科学研究院 | Opening-type Hall current sensor |
| CN102313833A (en) * | 2011-07-22 | 2012-01-11 | 四川省电力公司达州电业局 | Voltage signal collector |
| CN202421324U (en) * | 2011-10-18 | 2012-09-05 | 中国电力科学研究院 | Basic electric quantity type efficiency data acquisition terminal |
| CN202693649U (en) * | 2012-05-04 | 2013-01-23 | 上海协同科技股份有限公司 | Electricity theft preventing system |
| CN103149431A (en) * | 2013-03-19 | 2013-06-12 | 青岛乾程电子科技有限公司 | Multifunction watt-hour meter |
| GB2513197A (en) * | 2013-04-19 | 2014-10-22 | Dale Read | Energy reporting unit |
| CN204439709U (en) * | 2014-03-13 | 2015-07-01 | 达州市远东电器有限公司 | A kind of information collecting device of electricity load management terminal |
| CN205080201U (en) * | 2015-08-19 | 2016-03-09 | 南京新联电子股份有限公司 | A intelligent electric power collection module for switch board |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108628198A (en) * | 2017-03-16 | 2018-10-09 | 常州市小先信息技术有限公司 | Intelligent metering socket system and its control method based on Android application |
| CN107276231A (en) * | 2017-07-20 | 2017-10-20 | 南京新联电能云服务有限公司 | A kind of electric energy efficiency monitoring terminal of modularized design |
| CN109387719A (en) * | 2018-12-10 | 2019-02-26 | 湖南金天钛业科技有限公司 | A kind of DC water cooled cable use state detection device and detection method |
| CN111190099A (en) * | 2020-02-28 | 2020-05-22 | 上海良信电器股份有限公司 | Monitoring module and fuse circuit breaker |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105158600A (en) | Intelligent power acquisition module for power distribution cabinet | |
| WO2013056609A1 (en) | Electric energy quality type energy efficiency data acquisition terminal | |
| CN103617720A (en) | Multifunctional meter device with multipath control function | |
| CN203337722U (en) | Voltage and current collecting device of grid overhead transmission line | |
| CN205080201U (en) | A intelligent electric power collection module for switch board | |
| CN103257267A (en) | Built-in electric energy collection module of household appliance | |
| CN204389614U (en) | A kind of portable multi-function energy efficiency monitor | |
| CN212008793U (en) | Anti harmonic PT of intelligence synthesizes protector's integration test platform | |
| CN202975208U (en) | Power efficiency monitor | |
| CN202009265U (en) | High-voltage switch controller with metering function | |
| CN205177151U (en) | Power consumption information collection system's module terminal II type | |
| CN213814360U (en) | Low-voltage energy consumption sensing system based on Internet of things technology | |
| CN203165203U (en) | Wire-communication-based electrical information acquisition device | |
| CN203135130U (en) | Wireless intelligent control single-phase power socket with power metering function | |
| CN103149427A (en) | Single phase electronic watt-hour meter | |
| CN206640060U (en) | The Intelligent metering socket of remote control can be carried out | |
| CN203313064U (en) | High-frequency switching power supply module | |
| CN204808002U (en) | Intelligent control terminal based on central air conditioning regulation of loading | |
| CN203433345U (en) | Cognitive electric energy measurement and management cloud system | |
| CN203434738U (en) | Three power supply automatic changeover switch controller | |
| CN203167356U (en) | Street lamp illumination monitoring terminal | |
| CN202904364U (en) | Parking-apron distribution box with monitoring function | |
| CN203630569U (en) | Electrical prospecting generator remote monitoring circuit | |
| CN211063414U (en) | A distribution transformer monitoring device | |
| CN202772670U (en) | Transformer monitoring and control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151216 |
|
| WD01 | Invention patent application deemed withdrawn after publication |