CN107064598B - Electric current conversion and detection device and electric current detecting method - Google Patents
Electric current conversion and detection device and electric current detecting method Download PDFInfo
- Publication number
- CN107064598B CN107064598B CN201611142029.9A CN201611142029A CN107064598B CN 107064598 B CN107064598 B CN 107064598B CN 201611142029 A CN201611142029 A CN 201611142029A CN 107064598 B CN107064598 B CN 107064598B
- Authority
- CN
- China
- Prior art keywords
- current
- selection
- primary
- terminal
- current transformer
- 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.)
- Active
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000006243 chemical reaction Methods 0.000 title abstract description 7
- 238000012546 transfer Methods 0.000 claims description 27
- 238000012545 processing Methods 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 3
- 206010048669 Terminal state Diseases 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 14
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 10
- 210000004899 c-terminal region Anatomy 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The invention discloses a kind of conversion of electric current and detection device and electric current detecting methods.Wherein, which includes: current transformer, including primary side and secondary side, and the primary current for connecting primary side is converted to the secondary current of secondary side；At least one selection terminal, is connected with primary side respectively；Selection circuit is connected with the primary side of current transformer and at least one selection terminal, the conducting of one of primary side and at least one selection terminal for selecting current transformer.The present invention solves the technical issues of needing to have a power failure thread-changing when in the related technology testing the electrical parameter of primary equipment.
Description
Technical field
The present invention relates to sensor fields, in particular to a kind of conversion of electric current and detection device and current detecting side
Method.
Background technique
It carries out an acceptance inspection, in verifying work, is needed the primary current of primary equipment to customer substation, cell switchgear house
Secondary current is converted to, primary equipment is connected with current transformer, since equipment spacing is narrow, causes wiring inconvenient, wave
It is time-consuming, cause working efficiency low, it is also very desirable to which a kind of feasible scheme is to carry out current transformer meeting workflow
Primary equipment and test support equipment are conveniently connected under the premise of test, shorten reaying protection test setting up time, from
And working efficiency is improved, the power off time needed for reducing therefore improves electric network reliability.
For need to have a power failure when in the related technology testing the electrical parameter of primary equipment thread-changing the technical issues of, at present
Not yet put forward effective solutions.
Summary of the invention
The embodiment of the invention provides a kind of conversion of electric current and detection device and electric current detecting methods, at least to solve correlation
Need to have a power failure when testing the electrical parameter of primary equipment in technology thread-changing the technical issues of.
According to an aspect of an embodiment of the present invention, a kind of current transfer device is provided, comprising: current transformer, packet
Primary side and secondary side are included, the primary current for connecting primary side is converted to the secondary current of secondary side；At least one choosing
Terminal is selected, is connected respectively with primary side；Selection circuit is connected with the primary side of current transformer and at least one selection terminal
It connects, the conducting of one of primary side and at least one selection terminal for selecting current transformer.
Further, device further include: controller is connected with selection circuit, for receiving external command to control
Selection circuit selects the selection terminal being currently connected with the primary side of current transformer.
Further, at least one selection terminal includes three terminals, is respectively used to three that connect primary equipment to be measured
Phase line, selection circuit are three-pointswitch circuit, and controller is used to that one of three-pointswitch to be selected to be connected so that the switch institute of conducting is right
The phase line answered is connected to the primary side of current transformer.
Further, the device further include: shell, current transformer and selection circuit are arranged inside the shell, at least one
Selecting terminal setting further includes detection terminal in case surface, shell, and detection terminal is connected with the secondary side of current transformer
It connects, for connecting current sensor, current sensor is used to detect the electric current of secondary side.
Further, selection circuit includes: at least one selection switch, is arranged on the shell, one with current transformer
Secondary side is connected, and connects one to one at least one selection terminal, mutual for controlling the selection terminal being correspondingly connected with and electric current
The primary side of sensor is connected.
According to another aspect of an embodiment of the present invention, a kind of current detection means is additionally provided, comprising: provided by the invention
Current transfer device, for the primary current in primary equipment to be measured to be converted to secondary current；Current sensor turns with electric current
Changing device is connected, for detecting the current value of secondary current.
Further, current transfer device includes: shell, and detection terminal, current sensor are provided on the surface of shell
It is connected with detection terminal.
According to another aspect of an embodiment of the present invention, a kind of electric current detecting method is additionally provided, electric current detecting method is used for
Detect the primary current of primary equipment to be measured by current transfer device, current transfer device include at least one selection terminal,
At least one phase line of current transformer and selection circuit, at least one selection terminal and primary equipment to be measured, which corresponds, to be connected
It connects, current transformer is used to be converted to the primary current of primary equipment to be measured secondary current, and selection circuit is for selecting electric current
The conducting of one of the primary side of mutual inductor and at least one selection terminal, this method comprises: selection signal is exported to selection circuit,
In, primary side of the selection signal for control selections circuit selection selection terminal corresponding with selection signal and current transformer is led
It is logical；Acquire the current value of the secondary side of current transformer；Handled according to current value of the preset algorithm to acquisition with obtain to
Survey the current value of the primary current of primary equipment.
Further, this method further include: determine the phase line to be measured of primary equipment to be measured；It is generated and is selected according to phase line to be measured
Signal.
According to another aspect of an embodiment of the present invention, a kind of current detection means is additionally provided, current detection means is used for
Detect the primary current of primary equipment to be measured by current transfer device, current transfer device include at least one selection terminal,
At least one phase line of current transformer and selection circuit, at least one selection terminal and primary equipment to be measured, which corresponds, to be connected
It connects, current transformer is used to be converted to the primary current of primary equipment to be measured secondary current, and selection circuit is for selecting electric current
The conducting of one of the primary side of mutual inductor and at least one selection terminal, which includes: output unit, for defeated to selection circuit
Selection signal out, wherein selection signal selects selection terminal corresponding with selection signal and electric current mutual for control selections circuit
The primary side of sensor is connected；Acquisition unit, the current value of the secondary side for acquiring current transformer；Processing unit, for pressing
It is handled according to current value of the preset algorithm to acquisition to obtain the current value of the primary current of primary equipment to be measured.
In embodiments of the present invention, by current transformer, including primary side and secondary side, for what primary side was connected
Primary current is converted to the secondary current of secondary side；At least one selection terminal, is connected with primary side respectively；Selection circuit,
Be connected with the primary side of current transformer and at least one selection terminal, for select the primary side of current transformer at least
The conducting of one of one selection terminal, solves and needs the thread-changing that has a power failure when testing in the related technology the electrical parameter of primary equipment
The technical issues of, and then realize and be not required to the technical effect that power failure thread-changing can test the electrical parameter of primary equipment.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is a kind of schematic diagram of optional current transfer device according to an embodiment of the present invention；
Fig. 2 is the schematic diagram of another optional current detection means according to an embodiment of the present invention；
Fig. 3 is the schematic diagram of the panel of another optional current detection means according to an embodiment of the present invention；
Fig. 4 is a kind of schematic diagram of optional current detection means according to an embodiment of the present invention；
Fig. 5 is a kind of flow chart of optional electric current detecting method according to an embodiment of the present invention；
Fig. 6 is the schematic diagram of another optional current detection means according to an embodiment of the present invention.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein can in addition to illustrating herein or
Sequence other than those of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that cover
Cover it is non-exclusive include, for example, the process, method, system, product or equipment for containing a series of steps or units are not necessarily limited to
Step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, product
Or other step or units that equipment is intrinsic.
According to the embodiment of the present application, a kind of current transfer device is provided.
Fig. 1 is a kind of schematic diagram of optional current transfer device according to an embodiment of the present invention, as shown in Figure 1, the dress
Setting includes: current transformer 10, at least one selection terminal 20 and selection circuit 30.
Current transformer includes primary side and secondary side, and the primary current for connecting primary side is converted to secondary side
Secondary current；At least one selection terminal is connected with primary side respectively；The primary side of selection circuit and current transformer and extremely
A few selection terminal is connected, the conducting of one of primary side and at least one selection terminal for selecting current transformer.
The primary current that primary side connects is converted to the secondary current of secondary side by current transformer by the embodiment；Extremely
A few selection terminal is connected with primary side respectively；The primary side and at least one selection end of selection circuit and current transformer
Son is connected, and the conducting of one of primary side and at least one selection terminal for selecting current transformer solves the relevant technologies
In need to have a power failure when testing the electrical parameter of primary equipment thread-changing the technical issues of, and then realize and be not required to power failure thread-changing i.e.
The technical effect that the electrical parameter of primary equipment can be tested.
Preferably, device further include: controller is connected with selection circuit, for receiving external command to control choosing
It selects circuit and selects the selection terminal being currently connected with the primary side of current transformer.
Preferably, at least one selection terminal includes three terminals, is respectively used to connect three phases of primary equipment to be measured
Line, selection circuit are three-pointswitch circuit, and controller is used to that one of three-pointswitch to be selected to be connected so that corresponding to the switch of conducting
Phase line be connected to the primary side of current transformer.
Preferably, device further include: inside the shell, at least one is selected for shell, current transformer and selection circuit setting
Selecting terminal setting further includes detection terminal in case surface, shell, and detection terminal is connected with the secondary side of current transformer,
For connecting current sensor, current sensor is used to detect the electric current of secondary side.
Preferably, selection circuit includes: at least one selection switch, and setting is on the shell, primary with current transformer
Side is connected, and connects one to one at least one selection terminal, for controlling the selection terminal and Current Mutual Inductance that are correspondingly connected with
The primary side of device is connected.
Fig. 2 is the schematic diagram of another optional current detection means according to an embodiment of the present invention, as shown in Fig. 2, should
Detection device includes three terminals: A terminal, B terminal, C terminal, A terminal, B terminal, C terminal connect the one of current transformer respectively
One phase line of secondary side, when N-terminal wiring trackside, A terminal, B terminal, C terminal are connected with line side.Pass through three-dimensional
Selection switch selection L terminal is connected with one of A terminal, B terminal, C terminal.Fig. 3 is according to an embodiment of the present invention another
The schematic diagram of the panel of optional current detection means is planted, includes four output terminals on panel, left three terminals are respectively used to
A, B, C phase line are connected, input terminal is used to connect the battery of laboratory apparatus or polarity test according to test needs.
The current detection means that the embodiment provides realizes the effect for carrying out multinomial experiment by primary connection, can will become
It is completed together than wiring before being tested with polarity two, so that no-load voltage ratio test primary connection is completed at the same time polarity test.Monophase current
The three-phase that output is changed into manual switching through current device exports.It realizes the one man operation in transmission process, both saves the time
Decrease labor intensity.
According to the embodiment of the present application, a kind of current detection means is additionally provided.
Fig. 4 is a kind of schematic diagram of optional current detection means according to an embodiment of the present invention, as shown in figure 4, the inspection
Surveying device includes current transfer device 100 and current sensor 200.
The current detection means that the embodiment provides includes current transfer device provided by the invention, and current transfer device is used
In the primary current in primary equipment to be measured is converted to secondary current.Current sensor is connected with current transfer device, uses
In the current value of detection secondary current.Preferably, current transfer device includes: shell, is provided with test side on the surface of shell
Son, current sensor are connected with detection terminal.
According to the embodiment of the present application, a kind of electric current detecting method is additionally provided.The electric current detecting method is for passing through electric current
Conversion equipment detects the primary current of primary equipment to be measured, and current transfer device includes at least one selection terminal, Current Mutual Inductance
At least one phase line of device and selection circuit, at least one selection terminal and primary equipment to be measured connects one to one, and electric current is mutual
Sensor is used to be converted to the primary current of primary equipment to be measured secondary current, and selection circuit is for selecting the one of current transformer
The conducting of one of secondary side and at least one selection terminal.
Fig. 5 is a kind of flow chart of optional electric current detecting method according to an embodiment of the present invention, as shown in figure 5, the party
Method includes:
Step S101 exports selection signal to selection circuit, wherein selection signal is selected and selected for control selections circuit
The corresponding selection terminal of signal is selected to be connected with the primary side of current transformer；
Step S102 acquires the current value of the secondary side of current transformer；
Step S103 is handled according to current value of the preset algorithm to acquisition to obtain the primary electricity of primary equipment to be measured
The current value of stream.
Preferably, this method can also comprise determining that the phase line to be measured of primary equipment to be measured；It is generated and is selected according to phase line to be measured
Select signal.
According to the embodiment of the present application, a kind of current detection means is additionally provided.The current detection means is for passing through electric current
Conversion equipment detects the primary current of primary equipment to be measured, and current transfer device includes at least one selection terminal, Current Mutual Inductance
At least one phase line of device and selection circuit, at least one selection terminal and primary equipment to be measured connects one to one, and electric current is mutual
Sensor is used to be converted to the primary current of primary equipment to be measured secondary current, and selection circuit is for selecting the one of current transformer
The conducting of one of secondary side and at least one selection terminal.
Fig. 6 is the schematic diagram of another optional current detection means according to an embodiment of the present invention, as shown in fig. 6, should
Device includes: output unit 40, acquisition unit 50 and processing unit 60.
Output unit, for exporting selection signal to selection circuit, wherein selection signal is selected for control selections circuit
Selection terminal corresponding with selection signal is connected with the primary side of current transformer；Acquisition unit, for acquiring current transformer
Secondary side current value；Processing unit, for being handled according to current value of the preset algorithm to acquisition to obtain to be measured one
The current value of the primary current of secondary device.
Above-mentioned device may include processor and memory, and said units can be used as program unit and be stored in storage
In device, above procedure unit stored in memory is executed by processor to realize corresponding function.
Memory may include the non-volatile memory in computer-readable medium, random access memory (RAM) and/
Or the forms such as Nonvolatile memory, if read-only memory (ROM) or flash memory (flash RAM), memory include that at least one is deposited
Store up chip.
The sequence of above-mentioned the embodiment of the present application does not represent the advantages or disadvantages of the embodiments.
In above-described embodiment of the application, all emphasizes particularly on different fields to the description of each embodiment, do not have in some embodiment
The part of detailed description, reference can be made to the related descriptions of other embodiments.
In several embodiments provided herein, it should be understood that disclosed technology contents can pass through others
Mode is realized.Wherein, the apparatus embodiments described above are merely exemplary, such as the division of the unit, Ke Yiwei
A kind of logical function partition, there may be another division manner in actual implementation, for example, multiple units or components can combine or
Person is desirably integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed is mutual
Between coupling, direct-coupling or communication connection can be through some interfaces, the INDIRECT COUPLING or communication link of unit or module
It connects, can be electrical or other forms.
It, can also be in addition, each functional unit in each embodiment of the application can integrate in one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, the technical solution of the application is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can for personal computer, server or network equipment etc.) execute each embodiment the method for the application whole or
Part steps.And storage medium above-mentioned includes: that USB flash disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), mobile hard disk, magnetic or disk etc. be various to can store program code
Medium.
The above is only the preferred embodiment of the application, it is noted that for the ordinary skill people of the art
For member, under the premise of not departing from the application principle, several improvements and modifications can also be made, these improvements and modifications are also answered
It is considered as the protection scope of the application.
Claims (9)
1. a kind of current transfer device characterized by comprising
Current transformer, including primary side and secondary side, the primary current for connecting the primary side are converted to described two
The secondary current of secondary side；
At least one selection terminal, is connected with the primary side respectively；
Selection circuit is connected, for selecting with the primary side of the current transformer and at least one described selection terminal
State current transformer primary side and at least one described selection one of terminal conducting；
Controller is connected with the selection circuit, controlled for receiving external command selection circuit selection currently with
The selection terminal that the primary side of the current transformer is connected.
2. the apparatus according to claim 1, which is characterized in that
At least one described selection terminal includes three terminals, is respectively used to connect three phase lines of primary equipment to be measured, described
Selection circuit is three-pointswitch circuit, and the controller is used to that one of described three-pointswitch to be selected to be connected the switch institute so that conducting
Corresponding phase line is connected to the primary side of the current transformer.
3. the apparatus according to claim 1, which is characterized in that further include:
Shell, the current transformer and the selection circuit are arranged in the shell, at least one described selection terminal is set
Setting in the case surface, the shell further includes detection terminal, and the detection terminal is secondary with the current transformer
Side is connected, and for connecting current sensor, the current sensor is used to detect the electric current of the secondary side.
4. device according to claim 3, which is characterized in that the selection circuit includes:
At least one selection switch, setting on the housing, be connected with the primary side of the current transformer, with it is described extremely
A few selection terminal connects one to one, for controlling the primary side of the selection terminal and the current transformer that are correspondingly connected with
It is connected.
5. a kind of current detection means characterized by comprising
Current transfer device described in any one of Claims 1-4, for converting the primary current in primary equipment to be measured
For secondary current；
Current sensor is connected with the current transfer device, for detecting the current value of the secondary current.
6. device according to claim 5, which is characterized in that the current transfer device includes:
Shell is provided with detection terminal on the surface of the shell, and the current sensor is connected with the detection terminal.
7. a kind of electric current detecting method, which is characterized in that the electric current detecting method be used for by current transfer device detect to
The primary current of primary equipment is surveyed, the current transfer device includes at least one selection terminal, current transformer and selection electricity
At least one phase line on road, at least one the selection terminal and the primary equipment to be measured connects one to one, the electric current
Mutual inductor is used to be converted to the primary current of the primary equipment to be measured secondary current, and the selection circuit is described for selecting
The conducting of one of the primary side of current transformer and at least one selection terminal, which comprises
Selection signal is exported to the selection circuit, wherein the selection signal is for controlling the selection circuit selection and institute
The corresponding selection terminal of selection signal is stated to be connected with the primary side of the current transformer；
Acquire the current value of the secondary side of the current transformer；
It is handled according to current value of the preset algorithm to acquisition to obtain the electric current of the primary current of the primary equipment to be measured
Value；
The current transfer device further include: controller is connected with the selection circuit, for receiving external command to control
The selection circuit selects the selection terminal being currently connected with the primary side of the current transformer.
8. the method according to the description of claim 7 is characterized in that the method also includes:
Determine the phase line to be measured of the primary equipment to be measured；
The selection signal is generated according to the phase line to be measured.
9. a kind of current detection means, which is characterized in that the current detection means be used for by current transfer device detect to
The primary current of primary equipment is surveyed, the current transfer device includes at least one selection terminal, current transformer and selection electricity
At least one phase line on road, at least one the selection terminal and the primary equipment to be measured connects one to one, the electric current
Mutual inductor is used to be converted to the primary current of the primary equipment to be measured secondary current, and the selection circuit is described for selecting
One of the primary side of current transformer and at least one selection terminal conducting, described device include:
Output unit, for exporting selection signal to the selection circuit, wherein the selection signal is for controlling the selection
Circuit selects selection terminal corresponding with the selection signal to be connected with the primary side of the current transformer；
Acquisition unit, the current value of the secondary side for acquiring the current transformer；
Processing unit, for being handled according to current value of the preset algorithm to acquisition to obtain the one of the primary equipment to be measured
The current value of primary current；
The current transfer device further include: controller is connected with the selection circuit, for receiving external command to control
The selection circuit selects the selection terminal being currently connected with the primary side of the current transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611142029.9A CN107064598B (en) | 2016-12-12 | 2016-12-12 | Electric current conversion and detection device and electric current detecting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611142029.9A CN107064598B (en) | 2016-12-12 | 2016-12-12 | Electric current conversion and detection device and electric current detecting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107064598A CN107064598A (en) | 2017-08-18 |
| CN107064598B true CN107064598B (en) | 2019-08-09 |
Family
ID=59619281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611142029.9A Active CN107064598B (en) | 2016-12-12 | 2016-12-12 | Electric current conversion and detection device and electric current detecting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107064598B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201247277Y (en) * | 2008-08-18 | 2009-05-27 | 天津市电力公司 | Converting device for measuring current, voltage and power parameter |
| CN101667747A (en) * | 2009-08-14 | 2010-03-10 | 珠海瑞捷电气有限公司 | Conversion module for extracting working power from high-voltage power |
| CN201522516U (en) * | 2009-09-21 | 2010-07-07 | 邵阳维克液压有限责任公司 | Three-phase working current display device suitable for three-phase alternating current motor |
| CN102890170B (en) * | 2012-11-09 | 2015-08-26 | 成都天兴电气有限公司 | Three-phase electric energy meter false wiring automated conversion system |
| CN204065312U (en) * | 2014-08-05 | 2014-12-31 | 国家电网公司 | Bus current mutual inductor special no-load voltage ratio detector |
-
2016
- 2016-12-12 CN CN201611142029.9A patent/CN107064598B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107064598A (en) | 2017-08-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Mackay et al. | From dc nano-and microgrids towards the universal dc distribution system-a plea to think further into the future | |
| CN108092288A (en) | Load control unit, AC charging system and control method | |
| CN207994635U (en) | Load control unit and AC charging system | |
| TWI758948B (en) | Rental system, master-slave communication system and master and slave thereof | |
| CN108063498A (en) | Test system, the method and device of charge parameter | |
| CN105659463B (en) | Device and method for the stability for controlling local power grid using adjustable local power grid transformer | |
| CN107544001B (en) | The insulating test set of spacecraft thermal test cable | |
| CN110554258B (en) | Lightning arrester and transformer detection system | |
| CN104505552A (en) | Charging method and charging device | |
| CN107064682A (en) | Assembly detection apparatus | |
| CN106093803A (en) | Switch power supply aging test circuit | |
| US11549995B2 (en) | Test board, test system and test method for charging device | |
| CN106569146A (en) | Power supply module test system and method | |
| CN106793314A (en) | Lamp light control system based on POE and infrared induction technology | |
| CN105652098A (en) | Ground resistance detection and analysis system adopting solar energy to supply power | |
| CN113267706B (en) | Cable fault detection device and system | |
| CN108089055A (en) | A kind of testing lines device and its test method | |
| CN107064598B (en) | Electric current conversion and detection device and electric current detecting method | |
| CN204439746U (en) | Capacitor banks fault locator | |
| CN109616997A (en) | The optimization method and device of air switch, circuit | |
| CN108226844A (en) | The method and system of monitoring voltage mutual inductor | |
| CN109283472A (en) | A kind of power-supply device Intelligentized test system and test method | |
| CN211720250U (en) | Circuit breaker and topology network of circuit breaker | |
| CN108871613A (en) | A kind of temperature checking method and device of solar power system | |
| CN210323213U (en) | Platform district branch recognition device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |