CN206523551U - A kind of electronic mutual inductor in-situ digitalization module - Google Patents
A kind of electronic mutual inductor in-situ digitalization module Download PDFInfo
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- CN206523551U CN206523551U CN201720239470.2U CN201720239470U CN206523551U CN 206523551 U CN206523551 U CN 206523551U CN 201720239470 U CN201720239470 U CN 201720239470U CN 206523551 U CN206523551 U CN 206523551U
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Abstract
The utility model discloses a kind of electronic mutual inductor in-situ digitalization module, including transform coding module, the transform coding module is main by current signal conditioning circuit（4）, measurement current signal conditioning circuit（5）, multipath A/D converter（6）, transmitting message encoder（8）, Manchester encoder（9）, isolation transmitter（10）, impedance transformer（16）And voltage signal conditioning circuit（17）Constituted Deng part.The analog signal in-situ digitalization that the utility model exports script electronic mutual inductor, and encoded and electrical isolation, secondary device is output in a digital manner, coordinate combining unit scheme relative to existing digital output formula electronic mutual inductor, reduce complexity in circuits and cost, reliability is improved, the problem of solving the problems, such as one or two integration program middle and long distance transmission influence degrees of accuracy and electrical isolation.And can easily charged for replacement, facilitate the maintenance in later stage.
Description
Technical field
The utility model is related to a kind of makeup of Electrical Instrument Transducers with Digital and puts, and is used primarily in more than 6kV, below 35kV and matches somebody with somebody
In grid automation and measuring system.
Background technology
In 6~35kV power distribution networks, power distribution automation equipment（Such as FTU, DTU, TTU）With high-voltage electric energy measurement equipment etc.
Secondary device is both needed to high-voltage signal is changed into low-voltage signal by high voltage potential transformer and high-tension current inductor could be by just
Often collection.Also, traditional electromagnetic transformer is gradually substituted by electronic mutual inductor.
Electronic mutual inductor is divided into two classes by the form of its secondary output：One class is digital output formula, and a class is simulation
Measure output type.
Digital output formula electronic mutual inductor needs to generate data signal by primary transducer, and data signal passes through electricity
Air bound is transferred to combining unit from Transmission system（MU）, combining unit enters row clock synchronization and multichannel framing, and formation meets
The serial data of IEC60870-5-1 respective protocol forms, finally sends to all kinds of automation equipments and protection device.Due to number
Word amount output type electronic mutual inductor needs the rings such as primary side power supply, primary side converter, isolation Transmission system, combining unit
Section, so there is the defect that cost is high and maintenance is complicated, is only applicable to the power system of more than 110kV voltage levels.
Simulation output formula electronic mutual inductor directly exports below 10V analog signal, for example：Voltage transformer is exported
10/kV/3.25/V analog voltage signal, current transformer exports 600A/1V analog current signal.Due to signal
Voltage is relatively low, is easily disturbed by live forceful electric power.The electronic type voltage transformer of electric resistance partial pressure or principle of capacitive divider is based especially on,
Because output impedance is high, it is easier to influenceed by transmission line conduction parameter, and it is difficult to carry out electrically by transformer etc.
Isolation.If setting active device to carry out impedance conversion and realize electrical isolation at the primary equipment of high-pressure side, need one
Increase substantial amounts of complex electronics at secondary device, and the complex electronics usual life-span is shorter, and the two is merged meeting
Have influence on the bulk life time of primary equipment.
On the other hand, in the on-pole switch automation scheme based on one or two fusions, electronic mutual inductor is commonly installed
At on-pole switch, it is connected between secondary device by more than ten meters of long cables, the error caused by Long line transmission is very
Significantly.Also, when power circuit is by being struck by lightning, the ground wire voltage of electronic mutual inductor installation place and secondary device installation place is poor
It will significantly raise, without effective electrical isolation electronic type mutual inductance and secondary device will be caused to damage.
Utility model content
The utility model proposes a kind of electronic mutual inductor in-situ digitalization module, the purpose is to：（1）Solve digital quantity
The problem of cost is high in the scheme of output type electronic mutual inductor cooperation combining unit and safeguards complicated；（2）One or two times are solved to melt
In conjunction scheme the problem of the long range transmission influence degree of accuracy of the secondary simulation output of electronic mutual inductor；（3）Solve one or two times
Electrical isolation problem in integration program between electronic mutual inductor and secondary device；（4）Complex electronic equipment is solved to be arranged on
The problem of later maintenance being difficult in primary equipment body.
Technical solutions of the utility model are as follows：
The first connector, institute are provided with a kind of electronic mutual inductor in-situ digitalization module, including shell, the shell
The first connector is stated provided with three-phase current signal input, three-phase voltage signal input and signal output part；
Be provided with transform coding module in the shell, the transform coding module include protective current signal conditioning circuit,
Measure current signal conditioning circuit, multipath A/D converter, transmitting message encoder, Manchester encoder, isolation transmission
Device, impedance transformer and voltage signal conditioning circuit；
The input and measurement current signal of the three-phase current signal input and protective current signal conditioning circuit
The input of modulate circuit is respectively connected with；
The three-phase voltage signal input is connected by impedance transformer with the input of voltage signal conditioning circuit；
The output end of the protective current signal conditioning circuit, the output end and voltage for measuring current signal conditioning circuit
The output end subchannel of signal conditioning circuit is connected with the input of multipath A/D converter with respectively by the letter after adjustment
Number send to multipath A/D converter；
The output end of the multipath A/D converter pass sequentially through transmitting message encoder, Manchester encoder and
Isolation transmitter is connected with signal output part.
It is used as further improvement of the utility model：The transform coding module also includes the first analog adder and second
Analog adder；
The three-phase current signal input also passes through the first analog adder and the input of multipath A/D converter
It is connected；
The three-phase voltage signal input also passes through the second analog adder and the input of multipath A/D converter
It is connected.
It is used as further improvement of the utility model：Energization input, the shell are additionally provided with first connector
Inside it is additionally provided with for the power supply module for transform coding module for power supply, the power supply module includes power isolation circuit and with electric mortiser
Buffer circuit is pulled out, the energization input is by plugging buffer circuit and power isolation circuit and transform coding module phase
Connection.
It is used as further improvement of the utility model：The isolation transmitter includes RS422 drive circuits and driven with RS422
The signal isolation transformer that dynamic circuit is connected.
It is used as further improvement of the utility model：The transform coding module also include controller, the controller with
Multipath A/D converter, transmitting message encoder and Manchester encoder are respectively connected with.
It is used as further improvement of the utility model：The controller is also associated with indicator lamp, and the indicator lamp is arranged on
On shell.
It is used as further improvement of the utility model：Shell is provided with spring cavity and the through hole being connected with spring cavity,
It is placed with the through hole outside the top spring for being provided with and being connected with limited block the inner in limited block, the spring cavity, the limited block
Shell is stretched out at end；
The shell is additionally provided with the lockhole communicated vertical with through hole；
It is further opened with the limited block and the eccentric orfice eccentric relative to lockhole.
It is used as further improvement of the utility model：Also include the housing for being used to install shell；The housing is provided with use
In the second connector being connected with the first connector；The housing is provided with the spacing hole for being used for being engaged with limited block；
Also include being provided with internal thread in the key for being used to be engaged with lockhole, the lockhole, it is described to be provided with and this on the key
The external screw thread that internal thread is engaged, described key the inner is for taper, for being engaged with eccentric orfice.
Relative to prior art, the utility model has the positive effect that：The utility model is integrated in a device
The functions such as analog-to-digital conversion, coding, electrical isolation, the analog signal that can export script electronic mutual inductor is digital on the spot
Change, and encoded and electrical isolation, secondary device is output in a digital manner：Relative to existing digital output formula electronics
Formula transformer coordinates combining unit scheme, eliminates the independent once conversion, digital quantity transmission, secondary side of electronic mutual inductor
The link such as the merging of Multipath digital quantity input channel and data syn-chronization, reduces complexity in circuits and cost, improves reliable
Property；Also, the utility model also solves the long range of the secondary simulation output of electronic mutual inductor in one or two integration programs
The problem of transmission influence degree of accuracy；Also further solve electronic mutual inductor and secondary device in one or two integration programs simultaneously
Between electrical isolation problem.On the other hand, the utility model is integrated, by pushing up spring and limit block mechanism and can enter
The remote fast insert-pull of row, so as to quickly be plugged on the body of post-mounted panel switches and electronic mutual inductor fusion device
On high-voltage wire at upper or close electronic mutual inductor, the maintenance difficulties of electronic circuitry part are reduced, it is ensured that maintenance
Convenience and security.
Brief description of the drawings
Fig. 1 is electrical block diagram of the present utility model.
Fig. 2 is surface structure schematic diagram of the present utility model.
Fig. 3 is the structural representation of hot plugging mechanism in the utility model.
Embodiment
Describe the technical solution of the utility model in detail below in conjunction with the accompanying drawings：
Embodiment one
As shown in figure 1, a kind of electronic mutual inductor for one or two fusion on-pole switch equipment of 10kV power distribution networks is on the spot
The first connector is provided with digital module 1, including shell 3, the shell 3, first connector is provided with three-phase electricity
Flow signal input part, three-phase voltage signal input, signal output part and energization input；
Provided with transform coding module and for the power supply module for transform coding module for power supply in the shell 3.
The transform coding module includes protective current signal conditioning circuit 4, measurement current signal conditioning circuit 5, led to more
Road analog-digital converter 6, transmitting message encoder 8, Manchester encoder 9, isolation transmitter 10, impedance transformer 16 and electricity
Press signal conditioning circuit 17；
Multipath A/D converter 6 is by the Channel Synchronous of two panels 8 sampling analog-digital converter（AD7606）Constitute, be set to ± 5V
Full scale mode of operation.
The transform coding module also includes the first analog adder 13 and the second analog adder 14.
The power supply module includes power isolation circuit 11 and hot plugging buffer circuit 12, and the energization input passes through
Hot plugging buffer circuit 12 and power isolation circuit 11 are connected with transform coding module.
First connector is plug connector 2, and it uses WF28-16TA type plug-type water-proof connectors, had
Metal shell.Described shell 3 is aluminum waterproof circuit box, and the afterbody of plug connector 2 is connected with shell 3 by through hole.Protect
Protect current signal conditioning circuit 4, measurement current signal conditioning circuit 5, multipath A/D converter 6, controller 7, transmitting message
Encoder 8, Manchester encoder 9, isolation transmitter 10, power isolation circuit 11, hot plugging buffer circuit 12, impedance become
Parallel operation 16 and voltage signal conditioning circuit 17 are arranged on the printed circuit board (PCB) inside shell 3.
Each connection pin of plug connector 2 is connected respectively to the unit circuit of printed circuit board (PCB) by wire
On：
The input and measurement current signal of the three-phase current signal input and protective current signal conditioning circuit 4
The input of modulate circuit 5 is respectively connected with；
The adjustment amplitude of protective current signal conditioning circuit 4 is：When the voltage magnitude overrate of input current signal
10 times when, be sent to multipath A/D converter 6 magnitude peak be no more than multipath A/D converter 6 range value；
Measurement current signal conditioning circuit 5 adjustment amplitude be：When the voltage magnitude overrate of input current signal
1.2 times when, be sent to multipath A/D converter 6 magnitude peak be no more than multipath A/D converter 6 range value.
The output end of the protective current signal conditioning circuit 4 and the output end point for measuring current signal conditioning circuit 5
Passage is connected respectively to send the signal after adjustment to multichannel analog-to-digital conversion with the input of multipath A/D converter 6
Device 6.
The three-phase current signal input also passes through the input of the first analog adder 13 and multipath A/D converter 6
End is connected.
The signal for the reflection primary side three-phase current that plug connector 2 is inputted（UIa、UIb、UIc）Rated value is 1V.
Protective current signal conditioning circuit 4 is made up of three groups of resistance dividers, respectively by input signal carry out 5/ (25 ×) times（This embodiment is 25 times that input signal amplitude reaches rated value, and multipath A/D converter 6 is not spilt over）Partial pressure
Multipath A/D converter 6 is delivered to after conversion；
Measurement current signal conditioning circuit 5 be made up of three groups of operational amplifiers, respectively by input signal carry out 5/ (2 ×
) times（This embodiment is 2 times that input signal amplitude reaches rated value, and multipath A/D converter 6 is not spilt over）Amplification after give
To multipath A/D converter 6；
First analog adder 13 is made up of operational amplifier, and three-phase current signal synthesizes zero sequence current signal after being added
I0, send multipath A/D converter 6, different gains also can be set in the first analog adder 13, zero under so adjustable low current
The analog-to-digital conversion definition of sequence electric current.
The input phase that the three-phase voltage signal input passes through impedance transformer 16 and voltage signal conditioning circuit 17
Connection；The three-phase high impedance voltage signal of input is transformed into three-phase low-impedance voltage signal and delivered to by the impedance transformer 16
Voltage signal conditioning circuit 17；
The adjustment amplitude of voltage signal conditioning circuit 17 is：When 1.2 times of input voltage amplitude overrate, it is sent to
The peak value of the amplitude of multipath A/D converter 6 is no more than the range value of multipath A/D converter 6.
The output end of the voltage signal conditioning circuit 17 is connected to adjust with the input of multipath A/D converter 6
Signal after whole is sent to multipath A/D converter 6.
The three-phase voltage signal input also passes through the input of the second analog adder 14 and multipath A/D converter 6
End is connected.
The three-phase voltage signal that plug connector 2 is inputted（Ua、Ub、Uc）Rated value is 3.25/V, delivers to impedance change
Parallel operation 16, is converted into being sent to the mould of voltage signal conditioning circuit 17 and second after voltage signal in low impedance respectively after impedance transformation
Intend adder 14；
Impedance transformer 16 is made up of 3 groups of operational amplifiers connected respectively by emitter follower pattern, its input impedance
More than 10M Ω, output impedance is less than 10 Ω.
Voltage signal conditioning circuit 17 is made up of three groups of resistance dividers, the voltage for respectively exporting impedance transformer 16
Signal progress (5 ×)/(3.25×2×) times（This embodiment is 2 times that input signal amplitude reaches rated value, leads to more
Road analog-digital converter 6 is not spilt over）Partial pressure after be sent to multipath A/D converter 6.
Second analog adder 14 is made up of operational amplifier, and the three-phase voltage signal of input synthesizes residual voltage after being added
Signal U0 send multipath A/D converter 6.
The output end of the multipath A/D converter 6 passes sequentially through transmitting message encoder 8, Manchester encoder 9
And isolation transmitter 10 is connected with signal output part；
The isolation transmitter 10 includes RS422 drive circuits and the signal isolation being connected with RS422 drive circuits becomes
Depressor, two line output signals of isolating transformer are sent to plug connector 2 respectively.
The transform coding module also includes controller 7, the controller 7 and multipath A/D converter 6, transmitting message
Encoder 8 and Manchester encoder 9 are respectively connected with, to realize to multipath A/D converter 6, transmitting message encoder
8 and the control of Manchester encoder 9.
Controller 7, transmitting message encoder 8, the function of Manchester encoder 9 are by a piece of extensive programmable logic device
The digital logic functions of part are realized.
The logic functional block of wherein controller 7 outputs a control signal to AD7606, controls it by the speed of 4000 points/second
Sampling is synchronized to each channel data, and change data result is transported to the logic functional block of transmitting message encoder 8.
The logic functional block of transmitting message encoder 8 is according to FT3 frame formats as defined in IEC60870-5-1 and Chinese state
The order that normal data channel map as defined in family standard GB/T-20840.8 is determined is by the number from multipath A/D converter 6
According to composition serial communication message, Manchester encoder 9 is sent to.
The logic functional block of Manchester encoder 9 is under control of the controller 7 by 2.5Mbit/s speed to transmission
The data that message coding device 8 is sent carry out delivering to isolation transmitter 10 after Manchester's code.
In terms of power supply module, the power supply that plug connector 2 is inputted delivers to hot plugging buffer circuit 12, buffered
After deliver to power isolation circuit 11；
Plug inductor or 5 Ω resistors and one that buffer circuit 12 is accessed in power circuit by a series connection
The 10uF capacitors of the parallel connection access input of power isolation circuit 11 are constituted；
Power isolation circuit 11 is that a 24V with 3000Vdc isolation voltages turns ± 5V insulating power supply modules, output
± 5V power supplys are powered to each circuit being arranged in shell 3 on printed circuit board (PCB).
The controller 7 is also associated with the indicator lamp 15 being located on shell 3, under normal operating conditions relay indicating light 15 with
1 second cycle flashed, and was not flashed under malfunction.
Peripheral matched when coding module is applied to one or two integration programs of 10kV on-pole switch is changed in the present embodiment to set
It is standby to include：
The second connector for being connected with the first connector is additionally provided with, second connector is socket type connector
20, model WF28-16Z；
Three are based only on low power consumption current transformer（LPCT）The electronic current that principle and secondary side are exported with voltage system
Transformer 21,22,23, specification is 600A/1V, measures 0.2S grades, protects 5P10 grades, its analog quantity output signals is connected to socket
On the corresponding connecting pin of formula connector 20；
Three are based only on the electronic type voltage transformer 24,25,26 of resitstance voltage divider principle, and specification is 10/kV/3.25/V, 0.2 grade, its analog quantity output signals is connected on the corresponding connecting pin of socket type connector 20；
One station power distribution terminal 27（FTU）, the 24V dc sources output of distribution terminal 27 and digital quantity input signal cable are logical
Cable connection is crossed to the corresponding connecting pin of socket type connector 20.
Wherein, electronic current mutual inductor 21,22,23, electronic type voltage transformer 24,25,26 and female type connection
Device 20 is arranged on the Switch main body 40 on distribution pillar, and FTU is arranged in the middle part of line bar.The described grafting of transform coding module 1
On socket type connector 20.The cable and the cable for being connected FTU that electronic mutual inductor is connected on socket type connector 20 are mutual
Electrical isolation.
The surface structure of the present embodiment pluggable transform coding module is as shown in Figure 2.
Embodiment two
In the present embodiment, the function of controller 7 and transmitting message encoder 8 is realized by DSP, other parts be the same as Example
One.It is advantageous that：The data that can be sent by dsp software to multipath A/D converter 6 carry out software correction so that turn
The overall accuracy for changing coding module is no longer dependent on signal conditioning circuit, reduces the calibration difficulty in production process, improves
Device overall accuracy.
Embodiment three
Such as Fig. 3, the present embodiment is based on embodiment one or two：Also include the metal shell 30 for being used to install shell 3, female type
Connector 20 is changed to be arranged on the housing 30, and plug connector 2 and socket type connector 20 are changed to golden finger type
Connector.
Housing 30 has downward opening, and socket type connector 20 is arranged on the bottom of the top plate of housing 30, while housing 30
It is arranged on the side or bottom of distribution on-pole switch body.The connection cable of socket type connector 20 passes through housing 30 and electronics
Formula transformer and FTU cable are connected；Plug connector 2 is arranged on the top of shell 3；Transform coding module can be from housing
Inserted at 30 openings and plug connector 2 is connected with socket type connector 20, the top plate bottom of housing 30 and the top phase of shell 3
Waterproof sealing mechanism is provided with cooperation.
The shell 3 is also arranged on housing 30 by retaining mechanism：
The retaining mechanism includes the spring cavity being arranged on shell 3 and the horizontal through hole being connected with spring cavity, institute
Stating retaining mechanism also includes being arranged on the spacing hole 35 communicated with through hole of the side of housing 30 and is arranged in through hole and is used for
The limited block 32 being engaged with spacing hole 35；Shell 3 is stretched out in the outer end of limited block 32；
Provided with the top spring 33 being connected with the inner of limited block 32 in the spring cavity；
The retaining mechanism also include be arranged on the bottom of shell 3, the lockhole 31 communicated vertical with through hole and with lockhole 31
Internal thread is provided with the key 36 being engaged, the lockhole 31, the key 36 is provided with the external screw thread being engaged with internal thread,
The inner key 36 is taper；
The eccentric orfice 34 for being engaged with the inner tapering of key 36 is further opened with the limited block 32, the bias is
Refer to eccentric relative to lockhole 31.
Top spring 33 promote limited block 32 be projected into outside the surface of shell 3, when the grafting of transform coding module in place when, limited block 32
Alignd with spacing hole 35, limited block 32 is reached in spacing hole 35, being in transform coding module can not plug state.
When key 36 screws in lockhole 31, its top tapered tip is penetrated in eccentric orfice 34, by limited block 32 from spacing hole
Exited in 35, now transform coding module is in pluggable state.
Internal and external threads, cone point, limited block 32 and the mutual cooperation of spacing hole 35, it is to avoid in plug operating process
Transform coding module comes off from operation key 36, improves the security that device is used.
The present embodiment can be such that attendant turns in position of the ground away from high-tension line by operation with high pressure bar quick-replaceable
Change coding module part, it is ensured that the convenience and security of maintenance.
Housing 30 can also be set on high-voltage wire, without be provided in the side of distribution on-pole switch body 40 or under
Face, this has significant application value in without on-pole switch or power distribution automation storage improvement project.
Claims (8)
1. a kind of electronic mutual inductor in-situ digitalization module, it is characterised in that：Including shell（3）, the shell（3）It is upper to set
There is the first connector, first connector is provided with three-phase current signal input, three-phase voltage signal input and signal
Output end；
The shell（3）Interior to be provided with transform coding module, the transform coding module includes protective current signal conditioning circuit
（4）, measurement current signal conditioning circuit（5）, multipath A/D converter（6）, transmitting message encoder（8）, Manchester compile
Code device（9）, isolation transmitter（10）, impedance transformer（16）And voltage signal conditioning circuit（17）；
The three-phase current signal input and protective current signal conditioning circuit（4）Input and measurement current signal adjust
Manage circuit（5）Input be respectively connected with；
The three-phase voltage signal input passes through impedance transformer（16）With voltage signal conditioning circuit（17）Input phase
Connection；
The protective current signal conditioning circuit（4）Output end, measurement current signal conditioning circuit（5）Output end and electricity
Press signal conditioning circuit（17）Output end subchannel and multipath A/D converter（6）Input be connected with respectively will adjust
Signal after whole is sent to multipath A/D converter（6）；
The multipath A/D converter（6）Output end pass sequentially through transmitting message encoder（8）, Manchester encoder
（9）And isolation transmitter（10）It is connected with signal output part.
2. electronic mutual inductor in-situ digitalization module as claimed in claim 1, it is characterised in that：The transform coding module
Also include the first analog adder（13）With the second analog adder（14）；
The three-phase current signal input also passes through the first analog adder（13）With multipath A/D converter（6）Input
End is connected；
The three-phase voltage signal input also passes through the second analog adder（14）With multipath A/D converter（6）Input
End is connected.
3. electronic mutual inductor in-situ digitalization module as claimed in claim 1, it is characterised in that：On first connector
It is additionally provided with energization input, the shell（3）Inside it is additionally provided with for the power supply module for transform coding module for power supply, the power supply
Module includes power isolation circuit（11）With hot plugging buffer circuit（12）, the energization input is by plugging buffering
Circuit（12）And power isolation circuit（11）It is connected with transform coding module.
4. electronic mutual inductor in-situ digitalization module as claimed in claim 1, it is characterised in that：The isolation transmitter
（10）The signal isolation transformer being connected including RS422 drive circuits and with RS422 drive circuits.
5. electronic mutual inductor in-situ digitalization module as claimed in claim 1, it is characterised in that：The transform coding module
Also include controller（7）, the controller（7）With multipath A/D converter（6）, transmitting message encoder（8）And it is graceful thorough
This special encoder（9）It is respectively connected with.
6. electronic mutual inductor in-situ digitalization module as claimed in claim 5, it is characterised in that：The controller（7）Also
It is connected with indicator lamp（15）, the indicator lamp（15）It is arranged on shell（3）On.
7. the electronic mutual inductor in-situ digitalization module as described in claim 1 to 6 is any, it is characterised in that：Shell（3）On
Limited block is placed with the through hole being connected provided with spring cavity and with spring cavity, the through hole（32）, set in the spring cavity
Have and limited block（32）The top spring that the inner is connected（33）, the limited block（32）Shell is stretched out in outer end（3）；
The shell（3）It is additionally provided with the lockhole communicated vertical with through hole（31）；
The limited block（32）On be further opened with relative to lockhole（31）Eccentric eccentric orfice（34）.
8. electronic mutual inductor in-situ digitalization module as claimed in claim 7, it is characterised in that：Also include being used to install outer
Shell（3）Housing（30）；The housing（30）It is provided with the second connector for being used for being connected with the first connector；The housing
（30）Being provided with is used for and limited block（32）The spacing hole being engaged（35）；
Also include being used for and lockhole（31）The key being engaged（36）, the lockhole（31）It is interior to be provided with internal thread, the key
（36）Provided with the external screw thread being engaged with the internal thread, the key（36）The inner is taper, is used for and eccentric orfice（34）Phase
Coordinate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720239470.2U CN206523551U (en) | 2017-03-13 | 2017-03-13 | A kind of electronic mutual inductor in-situ digitalization module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720239470.2U CN206523551U (en) | 2017-03-13 | 2017-03-13 | A kind of electronic mutual inductor in-situ digitalization module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206523551U true CN206523551U (en) | 2017-09-26 |
Family
ID=59903040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720239470.2U Withdrawn - After Issue CN206523551U (en) | 2017-03-13 | 2017-03-13 | A kind of electronic mutual inductor in-situ digitalization module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206523551U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113466680A (en) * | 2021-05-26 | 2021-10-01 | 中国电力科学研究院有限公司 | Self-calibration method and system of metering module pluggable and interchangeable circuit breaker |
| CN113552524A (en) * | 2021-06-17 | 2021-10-26 | 中国电力科学研究院有限公司 | Measurement module for supporting hot plug and automatic calibration method |
| CN115914885A (en) * | 2022-11-30 | 2023-04-04 | 江苏易立电气股份有限公司 | Digital power distribution station terminal based on Manchester coding communication |
-
2017
- 2017-03-13 CN CN201720239470.2U patent/CN206523551U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113466680A (en) * | 2021-05-26 | 2021-10-01 | 中国电力科学研究院有限公司 | Self-calibration method and system of metering module pluggable and interchangeable circuit breaker |
| CN113466680B (en) * | 2021-05-26 | 2023-12-08 | 中国电力科学研究院有限公司 | Self-calibration method and system for circuit breaker with pluggable metering module |
| CN113552524A (en) * | 2021-06-17 | 2021-10-26 | 中国电力科学研究院有限公司 | Measurement module for supporting hot plug and automatic calibration method |
| CN113552524B (en) * | 2021-06-17 | 2024-02-09 | 中国电力科学研究院有限公司 | Measurement module for supporting hot plug and automatic calibration method |
| CN115914885A (en) * | 2022-11-30 | 2023-04-04 | 江苏易立电气股份有限公司 | Digital power distribution station terminal based on Manchester coding communication |
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