CN107783074A - Bandwidth carrier detection system of electric energy meter and detection method - Google Patents
Bandwidth carrier detection system of electric energy meter and detection method Download PDFInfo
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- CN107783074A CN107783074A CN201710901524.1A CN201710901524A CN107783074A CN 107783074 A CN107783074 A CN 107783074A CN 201710901524 A CN201710901524 A CN 201710901524A CN 107783074 A CN107783074 A CN 107783074A
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- 238000001514 detection method Methods 0.000 title claims abstract description 31
- 238000012545 processing Methods 0.000 claims description 7
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- 238000004891 communication Methods 0.000 description 8
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- 238000004364 calculation method Methods 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- 238000010411 cooking Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004886 process control Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
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Abstract
The present invention relates to electric energy meter detection technique field, and in particular to a kind of bandwidth carrier detection system of electric energy meter and a kind of carrier electric energy meter detection method.The carrier electric energy meter detecting system includes：Frame body 100, grafting line apparatus 70, carrier Control module 10, multipath server 20, switch control module 30, master control set 40, power source module 50 and standard electric energy meter module 60.The bandwidth carrier detection system of electric energy meter of the present invention includes master control set, multipath server and switch control module, can realize automation batch detection；Master control set coordinates with switch control module, and the carrier Control module being currently located at corresponding to the carrier electric energy meter of calibration equipment is opened, closes other carrier Control modules, reduces carrier signal interference.
Description
Technical field
The present invention relates to electric energy meter detection technique field, and in particular to a kind of bandwidth carrier detection system of electric energy meter and one
Kind carrier electric energy meter detection method.
Background technology
In power system, electric energy meter need to carry out verification detection before networking to its electric energy metering error.Prior art
In carrier electric energy meter detection be required to exclusively carry out wiring, and the communication module of carrier electric energy meter passes through power line transmission, carries
Ripple signal easily interferes with each other.
In consideration of it, the defects of overcoming the above in the prior art, there is provided it is a kind of new, bandwidth carrier detection system of electric energy meter into
For this area technical problem urgently to be resolved hurrily.
The content of the invention
It is an object of the invention to the drawbacks described above for prior art, there is provided a kind of bandwidth carrier detection system of electric energy meter
A kind of and bandwidth carrier electric energy meter detection method.
The purpose of the present invention can be realized by following technical measures：
In a first aspect, the invention provides a kind of bandwidth carrier detection system of electric energy meter, compared with prior art, it is different
Part is that the detecting system includes：
Frame body, the frame body include the folded lower unit with inner space set, the middle level with inner space
Unit and upper unit；
The grafting line apparatus for being used to plug into carrier electric energy meter to be measured located at the upper unit；
Multiple carrier Control modules located at lower unit inner space, each carrier Control module and multiple carrier electric powers
Table is correspondingly arranged；
The multipath server being all connected with located at lower unit inner space, with multiple carrier Control modules；
Respectively multiple carrier Control modules are controlled to open with being used for of being all connected with of multipath server and multiple carrier Control modules
The switch control module of pass, the switch control module are located at the inner space of the middle layer unit；
And
The master control set being connected with multipath server, the master control set control multiple carrier wave controls by switch control module
The switch of molding block, the voltage for receiving the carrier Control module and current information simultaneously measure electric energy according to it.
Preferably, the detecting system is also included located at lower unit inner space, the work(being connected with the multipath server
Rate source module.
Preferably, the detecting system is also included located at lower unit inner space, the mark being connected with the multipath server
Quasi- electric energy meter module.
Preferably, the master control set includes：
Information reading unit, for reading the information for the carrier electric energy meter for being currently located at calibration equipment；
First control unit, mould is controlled by switching for the information according to the carrier electric energy meter for being currently located at calibration equipment
Block controls the switch of multiple carrier Control modules；
Second control unit, for controlling the hardware initializations of multiple carrier Control modules, parameter initialization, data area
Initialization and node address are read；And
Electric energy metrical unit, for receive the carrier Control module voltage and current information and according to its metering electricity
Energy.
Preferably, the master control set includes an error calculation unit, for receive respectively standard electric energy meter module and
The voltage and current signal of carrier electric energy meter simultaneously calculate electric energy error.
Preferably, the multipath server includes：Signal processing module, the network interface mould being connected with the master control set
Block and RS-485 interface modules.
Preferably, the carrier Control module includes relay unit, and the relay unit connects with switch control module
Connect.
Second aspect, the invention provides a kind of bandwidth carrier electric energy meter detection method, and compared with prior art, it is different
Part is that the detection method comprises the following steps：
Step a：Carrier electric energy meter to be detected is delivered to the upper unit and plugged into the grafting line apparatus；
Step b：Corresponding carrier Control mould is opened according to the information for the carrier electric energy meter for being currently located at calibration equipment
Block simultaneously closes other carrier Control modules；
Step c：Receive the carrier Control module voltage and current information and according to its measure electric energy.
Preferably, also comprise the following steps after step b, before step c：
Hardware initialization, parameter initialization, data area initialization and node address is carried out to carrier Control module to read
Take.
Preferably, also comprise the following steps after step a, before step b：
Control power source module output voltage signal and current signal to standard electric energy meter module and are currently located at calibrating
The carrier electric energy meter of equipment, the voltage and current signal of standard electric energy meter module and carrier electric energy meter are received respectively and calculates electric energy
Error.
The carrier electric energy meter detecting system of the present invention includes master control set, multipath server and switch control module, can
Realize automation batch detection；Master control set coordinates with switch control module, will be currently located at the carrier electric energy meter of calibration equipment
Corresponding carrier Control module is opened, closes other carrier Control modules, reduces carrier signal interference.
Brief description of the drawings
Fig. 1 is the structural representation of the carrier electric energy meter detecting system of the embodiment of the present invention.
Fig. 2 is the structural representation of the carrier electric energy meter detecting system of the embodiment of the present invention.
Fig. 3 is the structured flowchart of the carrier electric energy meter detecting system of the embodiment of the present invention.
Fig. 4 be the embodiment of the present invention carrier electric energy meter detecting system in master control set structured flowchart.
Fig. 5 be the embodiment of the present invention carrier electric energy meter detecting system in multipath server structured flowchart.
Fig. 6 be the embodiment of the present invention carrier electric energy meter detecting system in carrier Control module and multipath server wiring
Figure.
Fig. 7 be the embodiment of the present invention carrier electric energy meter detecting system in multipath server wiring diagram.
Fig. 8 be the embodiment of the present invention carrier electric energy meter detecting system in carrier Control module and switch control module wiring
Figure.
Fig. 9 is the flow chart of the carrier electric energy meter detection method of the embodiment of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with the accompanying drawings and specific implementation
Example is described in further detail to the present invention.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention,
It is not intended to limit the present invention.
Hereinafter, refer to the attached drawing is more fully understood to many aspects of the present invention.Part in accompanying drawing may not be according to
Ratio is drawn.Alternatively, it is preferred that emphasis is clearly demonstrate the part of the present invention.In addition, in some views in the accompanying drawings, it is identical
Reference indicate corresponding part.
Word " exemplary " as used herein or " illustrative " expression are used as example, example or explanation.Retouch herein
Any embodiment stated as " exemplary " or " illustrative ", which is not necessarily to be construed as, to be preferable relative to other embodiment or has
Profit.All embodiments described below are illustrative embodiments, there is provided these illustrative embodiments be in order that
Those skilled in the art are obtained to make and be not intended to limit the scope of the present disclosure using embodiment of the disclosure and expection, the disclosure
Scope is defined by the claims.In other embodiments, well known feature and method be describe in detail so as not to obscure this
Invention.Moreover, have no intent to be provided by technical field above, background technology, the content of the invention or detailed description below
Any theoretical limitation expressed or implied.It should also be clear that it is shown in the drawings and the specific dress described in discussion below book
Put with process be the inventive concept limited in the following claims simple examples embodiment.Therefore, with it is disclosed herein
The related specific size of embodiment and other physical features be understood not to it is restricted, unless claims separately make it is bright
Really state.
Fig. 1, Fig. 2 and Fig. 3 show a kind of carrier electric energy meter detecting system, including：Frame body 100, grafting line apparatus 70,
Carrier Control module 10, multipath server 20, switch control module 30, master control set 40, power source module 50 and standard electric energy
Table module 60.Wherein, frame body 100 includes lower unit 101, middle layer unit 102 and upper unit 103, and lower unit 101 has
There is inner space, middle layer unit 102 has inner space, and frame body 100 can be inserted with linear, L-shaped, U-shaped or square arrangement
Termination 70 is on upper unit 103, for example, in the present embodiment, multiple grafting line apparatus 70 are arranged in upper unit
103 both sides, grafting line apparatus 70 are used to plug into carrier electric energy meter to be measured, carrier electric energy meter to be detected and grafting line apparatus 70
It is equal with carrier Control module 10, multipath server 20, switch control module 30, master control set 40 and power source module 50 after plugging into
Connection, grafting line apparatus 70 is located at inner side with one end that carrier electric energy meter to be detected is mutually plugged into, during switch control module 30 is located at
The inner space of layer unit 102, standard electric energy meter module 60, multipath server 20, power source module 50 and carrier Control module
10 are located at the inner space of lower unit 101.Carrier Control module 10 is the communication module of carrier electric energy meter, and utilization is existing
Mains loop carries out power carrier communication, and each carrier Control module 10 is correspondingly arranged with multiple carrier electric energy meters.It is more
Road server 20 is all connected with each carrier Control module 10.Switch control module 30 and multipath server 20 and multiple carrier wave controls
Molding block 10 is all connected with, and it is used to control multiple carrier Control modules 10 to switch respectively.Master control set 40 and multipath server 20
Connection, master control set 40 are controlled the switch of multiple carrier Control modules 10 by switch control module 30, pass through multipath server
20 receive the voltage of carrier Control module 10 and current information and measure electric energy according to it.Power source module 50 and multipath server
20 connections, power source module 50 can output frequency, phase, amplitude, can arbitrarily heighten precision, high stability within the specific limits
Sinusoidal voltage and electric current, used for doing check and correction during work about electric power.Standard electric energy meter module 60 is connected with multipath server 20, is
For measuring the high precision instrument of certain time period electric energy aggregate-value.
In a preferred embodiment, each carrier Control module 10 includes a relay unit, relay unit
It is connected with switch control module 30, switch control module 30 realizes carrier Control module 10 by the break-make of control relay unit
Switch.For example, as shown in figure 8, each enterprise sets a carrier Control module 10, " Neusoft ", " ancient cooking vessel letter " and " dawn journey " point
First carrier control module, the second carrier Control module and the 3rd carrier Control module, first carrier control mould are not correspondingly arranged
The block electric energy meter all with " Neusoft " is correspondingly arranged, and records the information of " Neusoft " all electric energy meters；Second carrier Control module with
" ancient cooking vessel letter " all electric energy meters are correspondingly arranged, and record the information of " ancient cooking vessel letter " all electric energy meters；3rd carrier Control module and " dawn
All electric energy meters of journey " are correspondingly arranged, and record the information of " dawn journey " all electric energy meters.
In a preferred embodiment, refer to shown in Fig. 4, master control set 40 includes：Information reading unit 401,
One control unit 402, the second control unit 403, electric energy metrical unit 404 and error calculation unit 405, wherein, information is read
Unit 401 is used for the information for reading the carrier electric energy meter for being currently located at calibration equipment；First control unit 402 is used for according to current
The switch of multiple carrier Control modules 10 is controlled by switch control module 30 positioned at the information of the carrier electric energy meter of calibration equipment；
Second control unit 403 is used to control the hardware initialization of multiple carrier Control modules 10, parameter initialization, data area initial
Change and node address is read；Electric energy metrical unit 404 is used for the voltage and current information for receiving the carrier Control module 10
And electric energy is measured according to it；Error calculation unit 405 is used to receiving standard electric energy meter module 60 and carrier electric energy meter 10 respectively
Voltage and current signal simultaneously calculate electric energy error.
In a preferred embodiment, refer to shown in Fig. 5, multipath server 20 includes signal processing module 201, net
Network interface module 202, RS-485 interface modules 203 and isolation module 204, wherein, signal processing module 201 is received from actively
Every control instruction of device 40, parse the control instruction and be sent to corresponding function module, isolation module further according to command content
204 are connected with signal processing module 201, the isolated transmission for realizing signal, and Network Interface Module 202 connects with master control set 40
Connect, RS-485 interface modules 203 are provided with multiple, carrier Control module 10, switch control module 30, power source module 50 and mark
Quasi- electric energy meter module 60 is connected by RS-485 interface modules 203 with multipath server 20, Network Interface Module 202 and RS-
Data communication can be realized by signal processing module 201 between 485 interface modules 203.One Network Interface Module 202 is corresponding more
Individual RS-485 interface modules 203, so as to reach by a network interface to control multiple RS485 serial communications.
Specifically, the hardware components of the carrier electric energy meter detecting system of a preferred embodiment of the invention include：Carrier wave
Control module 10, multipath server 20, switch control module 30, power source module 50 and standard electric energy meter module 60, multichannel clothes
Business device 20 be 2018- multipath servers (abbreviation 2018), carrier Control module 10 is 2041A carrier Controls module (for example, being
CL2041 carrier communication modules), switch control module 30 be CL2029B multifunctional control boards, be additionally provided with warning light,
Bright light flashes in the case that each hardware breaks down, and plays and reminds user's processing equipment failure in time, and alarm lamp is also referred to as three colors
Lamp.Refer to shown in Fig. 6, carrier Control module 10 (i.e. 2041A carrier Controls module, referred to as 2041) in, J3, J2, J6's
Connecting line all draws line by shell mechanism opening；Multiple 2041 J2 serial ports need to be connected to 2018 different serial ports, and
The connecting line subscript at J2 ends express friendship used in 2018 serial ports numbering；Multiple 2041 J6 is connected to the (isolation of isolation module 204
PT last output winding).Refer to shown in Fig. 7, carrier Control module 10, switch control module 30, power source module
50th, standard electric energy meter module 60, warning light are connected by RS-485 interface modules 203 with multipath server 20.It please join
Read shown in Fig. 8, switch control module 30 (multifunctional control board) controls six carrier waves respectively by relay K1 to K6 break-make
The switch of control module 10.
In this manual, PLC implication：It is a kind of exclusively for the digital operation applied and designed in industrial settings
Electronic installation, the memory that its use can program, for its storage inside execution logic computing, sequential operation,
The instruction of the operations such as timing, counting and arithmetical operation, and can be controlled various types of by digital or analog input and output
The machinery or production process of type.OPC implication：OPC (OLE for Process Control, the OLE for process control) base
In OLE (present Active X), the COM (component object model) and DCOM (Distributed Component Object model) technology of Microsoft.
OPC includes the regular set of a whole set of interface, attribute and method, for process control and automated manufacturing system.OPC designs
Purpose is exactly certain node acquisition data from network.
Master control set 40 is PC, Information reading unit 401, the first control unit 402, the second control unit 403, electric energy meter
It is PC control programs to measure unit 404 and error calculation unit 405.Whole carrier electric energy meter detecting system can be configured as certainly
Dynamicization is run.All hardware equipment is all to control the boosting of hardware and communication by 2018- multipath servers port, and it flows
Journey is PC first to control power source to boost, then PC softwares control 2041A opening and closing by 2018-3, have ensured that current carrier
Module communication is not disturbed by other carrier signals, then carries out hardware initialization to current 2041A carrier Controls module, and parameter is initial
Change and data field initializes and the reading of node address, finally read the electric flux of each carrier electric energy meter.Automaticity
It is when being loaded with the pallet of carrier electric energy meter to flow to calibrating station through pipeline, to be identified whether by induction installation and pallet numbering
The calibrating station can be entered, when qualified pallet enters the calibrating station to when buying securities with all one's capital, system can plug into automatically, lead to simultaneously
Cross opc signals to send to PC calibrating softwares, while it can start automatic Verification.
Correspondingly, the embodiment of the present invention additionally provides a kind of carrier electric energy meter detection method, using above-mentioned carrier electric power
Table is detected, and this method comprises the following steps：
Step S101：Carrier electric energy meter to be detected is delivered to the upper unit and connect with the grafting line apparatus
Refute.
Step S102：Control power source module output voltage signal and current signal are to standard electric energy meter module and currently
Positioned at the carrier electric energy meter of calibration equipment, the voltage and current signal of standard electric energy meter module and carrier electric energy meter are received respectively simultaneously
Calculate electric energy error.
Step S103：Corresponding carrier Control is opened according to the information for the carrier electric energy meter for being currently located at calibration equipment
Module simultaneously closes other carrier Control modules.
Step S104：Hardware initialization, parameter initialization, data area initialization and section are carried out to carrier Control module
Dot address is read.
Step S105：Receive the carrier Control module voltage and current information and according to its measure electric energy.
Specifically, refer to shown in Fig. 9, first, the pallet for being loaded with carrier electric energy meter enters calibrating station to buying securities with all one's capital；Its
Secondary, PC softwares are numbered by pallet and obtain table information, start to automatically control each equipment perform detection；Again, PC softwares according to work as
The information of preceding carrier wave meter, corresponding carrier module (2041A) break-make is controlled, other carrier modules are closed, to avoid disturbing；Then,
At the beginning of PC softwares directly control the hardware initialization of 2041A modules, parameter initialization, data field by 2018-3 multipath servers
Beginningization, and the reading of node address, the electricity for examining and determine all carrier wave meters of station is read；Finally, the electricity of carrier wave meter is completed
It has been gathered that, distribute into and specify finally to PLC, notify its release to plug into, so far the detection process of whole carrier wave meter terminates, support of letting pass
Disk, continue the detection of next group carrier wave.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should be included in the scope of the protection.
Claims (10)
1. a kind of bandwidth carrier detection system of electric energy meter, it is characterised in that the detecting system includes：
Frame body, the frame body include the folded lower unit with inner space set, the middle layer unit with inner space,
And upper unit；
The grafting line apparatus for being used to plug into carrier electric energy meter to be measured located at the upper unit；
Multiple carrier Control modules located at lower unit inner space, each carrier Control module and multiple carrier electric energy meters pair
It should set；
The multipath server being all connected with located at lower unit inner space, with multiple carrier Control modules；
With multipath server and multiple carrier Control modules be all connected be used for control multiple carrier Control module switch respectively
Switch control module, the switch control module are located at the inner space of the middle layer unit；
And
The master control set being connected with multipath server, the master control set control multiple carrier Control moulds by switch control module
The switch of block, the voltage for receiving the carrier Control module and current information simultaneously measure electric energy according to it.
2. carrier electric energy meter detecting system according to claim 1, it is characterised in that the detecting system also includes being located at down
Layer unit inner space, the power source module being connected with the multipath server.
3. carrier electric energy meter detecting system according to claim 1, it is characterised in that the detecting system also includes being located at down
Layer unit inner space, the standard electric energy meter module being connected with the multipath server.
4. carrier electric energy meter detecting system according to claim 1, it is characterised in that the master control set includes：
Information reading unit, for reading the information for the carrier electric energy meter for being currently located at calibration equipment；
First control unit, for passing through switch control module control according to the information for the carrier electric energy meter for being currently located at calibration equipment
Make the switch of multiple carrier Control modules；
Second control unit, for controlling the hardware initializations of multiple carrier Control modules, parameter initialization, data area initial
Change and node address is read；And
Electric energy metrical unit, for receive the carrier Control module voltage and current information and according to its measure electric energy.
5. carrier electric energy meter detecting system according to claim 4, it is characterised in that the master control set includes a mistake
Poor computing unit, for receive respectively standard electric energy meter module and carrier electric energy meter voltage and current signal and calculate electric energy miss
Difference.
6. carrier electric energy meter detecting system according to claim 1, it is characterised in that the multipath server includes：Letter
Number processing module, the Network Interface Module being connected with the master control set and RS-485 interface modules.
7. carrier electric energy meter detecting system according to claim 1, it is characterised in that the carrier Control module include after
Electric appliance unit, the relay unit are connected with switch control module.
8. a kind of bandwidth carrier electric energy meter detection method, it is characterised in that the detection method comprises the following steps：
Step a：Carrier electric energy meter to be detected is delivered to the upper unit and plugged into the grafting line apparatus；
Step b：Corresponding carrier Control module is opened simultaneously according to the information for the carrier electric energy meter for being currently located at calibration equipment
Close other carrier Control modules；
Step c：Receive the carrier Control module voltage and current information and according to its measure electric energy.
9. carrier electric energy meter detection method according to claim 8, it is characterised in that after step b, before step c
Also comprise the following steps：
Hardware initialization, parameter initialization, data area initialization and node address is carried out to carrier Control module to read.
10. carrier electric energy meter detection method according to claim 8, it is characterised in that after step a, before step b
Also comprise the following steps：
Control power source module output voltage signal and current signal to standard electric energy meter module and are currently located at calibration equipment
Carrier electric energy meter, receive the voltage and current signal of standard electric energy meter module and carrier electric energy meter respectively and calculate electric energy mistake
Difference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710901524.1A CN107783074A (en) | 2017-09-28 | 2017-09-28 | Bandwidth carrier detection system of electric energy meter and detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710901524.1A CN107783074A (en) | 2017-09-28 | 2017-09-28 | Bandwidth carrier detection system of electric energy meter and detection method |
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| Publication Number | Publication Date |
|---|---|
| CN107783074A true CN107783074A (en) | 2018-03-09 |
Family
ID=61434279
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710901524.1A Pending CN107783074A (en) | 2017-09-28 | 2017-09-28 | Bandwidth carrier detection system of electric energy meter and detection method |
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| CN101581773A (en) * | 2009-06-05 | 2009-11-18 | 深圳市科陆电子科技股份有限公司 | Carrier electric energy meter detecting method |
| CN201383001Y (en) * | 2009-03-19 | 2010-01-13 | 重庆电力科学试验研究院 | Device for detecting carrier electric meters in batches |
| CN201637781U (en) * | 2010-01-29 | 2010-11-17 | 武汉盛帆电子股份有限公司 | Single-phase intelligent carrier electric energy meter with low power consumption |
| CN102176700A (en) * | 2011-01-30 | 2011-09-07 | 重庆电力科学试验研究院 | Concentrator detecting device |
| CN202471955U (en) * | 2012-03-19 | 2012-10-03 | 广西电网公司电力科学研究院 | Connection system applicable to communication performance comparative test of multiple carrier electric energy meters |
| CN103236892A (en) * | 2013-04-18 | 2013-08-07 | 国家电网公司 | Carrier communication testing system |
| CN203661059U (en) * | 2013-12-31 | 2014-06-18 | 郑州三晖电气股份有限公司 | Parallel carrier wave communication tester |
| CN204359928U (en) * | 2014-12-27 | 2015-05-27 | 潍坊五洲浩特电气有限公司 | A kind of intelligent electric energy meter Auto-Test System |
-
2017
- 2017-09-28 CN CN201710901524.1A patent/CN107783074A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201383001Y (en) * | 2009-03-19 | 2010-01-13 | 重庆电力科学试验研究院 | Device for detecting carrier electric meters in batches |
| CN101581773A (en) * | 2009-06-05 | 2009-11-18 | 深圳市科陆电子科技股份有限公司 | Carrier electric energy meter detecting method |
| CN201637781U (en) * | 2010-01-29 | 2010-11-17 | 武汉盛帆电子股份有限公司 | Single-phase intelligent carrier electric energy meter with low power consumption |
| CN102176700A (en) * | 2011-01-30 | 2011-09-07 | 重庆电力科学试验研究院 | Concentrator detecting device |
| CN202471955U (en) * | 2012-03-19 | 2012-10-03 | 广西电网公司电力科学研究院 | Connection system applicable to communication performance comparative test of multiple carrier electric energy meters |
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| CN203661059U (en) * | 2013-12-31 | 2014-06-18 | 郑州三晖电气股份有限公司 | Parallel carrier wave communication tester |
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Application publication date: 20180309 |