CN210744828U - Communication device and remote operation and maintenance system of power distribution terminal - Google Patents

Communication device and remote operation and maintenance system of power distribution terminal Download PDF

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Publication number
CN210744828U
CN210744828U CN201921668945.5U CN201921668945U CN210744828U CN 210744828 U CN210744828 U CN 210744828U CN 201921668945 U CN201921668945 U CN 201921668945U CN 210744828 U CN210744828 U CN 210744828U
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China
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terminal
module
power
resistor
communication device
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CN201921668945.5U
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程华志
李晓峰
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Zhuhai Strom Electrical Co ltd
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Zhuhai Strom Electrical Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20—Smart grids as enabling technology in buildings sector
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission

Abstract

The utility model discloses a communication device, which comprises a Bluetooth module in wireless connection with a distribution automation terminal, a WIFI module in wireless connection with a mobile terminal, a processor and a power module; the Bluetooth module comprises a first communication parameter output end and a first communication parameter input end, the WIFI module comprises a first configuration signal input end and a first configuration signal output end, the processor comprises a second communication parameter input end, a second communication parameter output end, a second configuration signal output end and a second configuration signal input end, and the processor, the Bluetooth module and the WIFI module are all connected with the power module. Correspondingly, the utility model also discloses a long-range fortune dimension system of distribution terminal. Adopt the embodiment of the utility model provides a, can realize distribution automation terminal and mobile terminal's wireless connection, reduce distribution automation terminal's the fortune dimension degree of difficulty, improve distribution automation terminal fortune dimension efficiency, reduce distribution automation terminal fortune dimension cost.

Description

Communication device and remote operation and maintenance system of power distribution terminal
Technical Field
The utility model relates to a power electronics technical field especially relates to communication device and long-range fortune dimension system of distribution terminal.
Background
Distribution automation terminal equipment communicates with the distribution substation, sends distribution equipment's operation data to the distribution substation to receive the control command of distribution substation simultaneously and come to control and adjust distribution equipment, whether safe operation is directly influenced to distribution automation terminal equipment operation conditions's quality. When the power distribution automation terminal equipment is installed for debugging for the first time or when the defect of elimination appears in the operation and maintenance process, a special intelligent terminal is needed to acquire and configure the communication parameters of the power distribution automation terminal equipment, and the configured communication parameters are sent to the power distribution automation terminal equipment again. The mode of obtaining the communication parameter of distribution automation terminal equipment and configuring at present is to connect the distribution automation terminal equipment to the intelligent terminal by adopting a distribution extension line, so that the intelligent terminal can obtain the communication parameter of the distribution automation terminal equipment by the distribution extension line, and then configure the communication parameter of the distribution automation terminal equipment.
The power distribution automation terminal equipment is configured and debugged in a wired connection mode, on the first hand, wiring is needed when the power distribution automation terminal equipment is debugged and maintained every time, and operation is more inconvenient for some power distribution automation terminal equipment which is difficult to contact with the installation position; on the second hand, operation and maintenance personnel need to carry out close-range debugging and maintenance on the distribution automation terminal equipment, so that potential safety hazards exist, power failure treatment is generally needed, and normal operation of a power grid is influenced; and in the third aspect, a special intelligent terminal is needed to debug the distribution automation terminal equipment.
Disclosure of Invention
The to-be-solved technical problem of the utility model is to provide a communication device and long-range fortune dimension system of distribution terminal can realize distribution automation terminal and mobile terminal's wireless connection, reduces the fortune dimension degree of difficulty at distribution automation terminal, improves distribution automation terminal fortune dimension efficiency, reduces distribution automation terminal fortune dimension cost.
In order to solve the technical problem, the utility model provides a communication device, which comprises a bluetooth module in wireless connection with a distribution automation terminal, a WIFI module in wireless connection with a mobile terminal, a processor and a power module;
the Bluetooth module comprises a first communication parameter output end and a first communication parameter input end, the WIFI module comprises a first configuration signal input end and a first configuration signal output end, and the processor comprises a second communication parameter input end, a second communication parameter output end, a second configuration signal output end and a second configuration signal input end;
the first communication parameter output end is connected with the second communication parameter input end, the first communication parameter input end is connected with the second communication parameter output end, the second configuration signal output end is connected with the first configuration signal input end, the second configuration signal input end is connected with the first configuration signal output end, and the processor, the Bluetooth module and the WIFI module are all connected with the power module.
The Bluetooth module further comprises a first control signal input end, and the WIFI module further comprises a second control signal input end;
the first control signal output end is connected with the first control signal input end, and the second control signal output end is connected with the second control signal input end.
Furthermore, the bluetooth module further comprises a bluetooth chip, a first resistor, a second resistor, a first switch tube and a first capacitor, wherein the bluetooth chip comprises a data receiving end, a data sending end and a power end;
the data receiving end of the Bluetooth chip is connected with the first communication parameter input end, and the data sending end of the Bluetooth chip is connected with the first communication parameter output end;
the power end of the Bluetooth chip is connected with the first end of the first switch tube and the first end of the first capacitor respectively, the second end of the first capacitor is grounded, the second end of the first switch tube is connected to a power supply, the control end of the first switch tube is connected with the first end of the first resistor and the first end of the second resistor respectively, the second end of the first resistor is connected with the first control signal input end, and the second end of the second resistor is connected to the power supply.
Further, the WIFI module further comprises a WIFI chip, a third resistor, a fourth resistor, a second switching tube and a second capacitor, wherein the WIFI chip comprises a data receiving end, a data sending end and a power end;
the data receiving end of the WIFI chip is connected with the first configuration signal input end, and the data sending end of the WIFI chip is connected with the first configuration signal output end;
the power end of the WIFI chip is connected with the first end of the second switch tube and the first end of the second capacitor respectively, the second end of the second capacitor is grounded, the second end of the second switch tube is connected to a power supply, the control end of the second switch tube is connected with the first end of the third resistor and the first end of the fourth resistor respectively, the second end of the third resistor is connected with the second control signal input end, and the second end of the fourth resistor is connected to the power supply.
Further, the power module comprises a battery and a power management unit;
the battery is connected with the power management unit, and the power management unit is connected with the processor.
Further, the power management unit is formed by a chip NCP1529 and a peripheral circuit thereof.
Further, the processor is formed by the chip STM32F103CBT6 and peripheral circuits thereof.
The utility model also provides a distribution terminal remote operation and maintenance system, which comprises a distribution automation terminal, a communication device and a mobile terminal;
the communication device is the communication device according to the above;
the communication device is wirelessly connected with the distribution automation terminal through the Bluetooth module, and the communication device is wirelessly connected with the mobile terminal through the WIFI module.
Further, the distribution automation terminal is a feeder terminal device.
The utility model provides a communication device and distribution terminal remote operation and maintenance system, power module provides the electric energy for bluetooth module, WIFI module and treater, bluetooth module and distribution automation terminal wireless connection, be used for acquireing the communication parameter that stores in the distribution automation terminal and send to the treater, the treater generates the communication parameter that receives and waits to dispose the signal and sends to the WIFI module, the WIFI module is connected with the mobile terminal wireless, be used for sending to wait to dispose the signal to the mobile terminal, the WIFI module still is used for receiving the configuration signal after the mobile terminal configuration processing, the WIFI module sends the signal after the configuration to the treater, the treater generates the communication parameter after the configuration according to the configuration signal and sends to distribution automation terminal equipment through bluetooth module, substituted former communication parameter realizes the wireless connection of distribution terminal and mobile terminal through communication device, need not adopt the distribution extension line to connect again, reduce the fortune dimension degree of difficulty at distribution automation terminal, fortune dimension personnel can carry out remote control through mobile terminal such as cell-phone, panel computer, need not to have a power failure and handle, need not additionally to set up special intelligent terminal to improve distribution automation terminal fortune dimension efficiency, reduce distribution automation terminal fortune dimension cost.
Drawings
Fig. 1 is a circuit block diagram of an embodiment of a communication device provided by the present invention;
fig. 2 is a schematic circuit diagram of an embodiment of a power management unit of a communication device;
fig. 3 is a schematic circuit diagram of an embodiment of a bluetooth module of a communication device according to the present invention;
fig. 4 is a schematic circuit diagram of an embodiment of a WIFI module of a communication device provided by the present invention;
fig. 5 is a circuit block diagram of an embodiment of the remote operation and maintenance system for a power distribution terminal provided by the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, a circuit block diagram of an embodiment of a communication device according to the present invention is shown.
The embodiment provides a communication device, which comprises a Bluetooth module 1 wirelessly connected with a distribution automation terminal, a WIFI module 2 wirelessly connected with a mobile terminal, a processor 3 and a power module 4;
the bluetooth module 1 comprises a first communication parameter output terminal a1 and a first communication parameter input terminal b1, the WIFI module 2 comprises a first configuration signal input terminal d1 and a first configuration signal output terminal c1, and the processor 3 comprises a second communication parameter input terminal a2, a second communication parameter output terminal b2, a second configuration signal output terminal d2 and a second configuration signal input terminal c 2;
the first communication parameter output end a1 is connected with the second communication parameter input end a2, the first communication parameter input end b1 is connected with the second communication parameter output end b2, the second configuration signal output end d2 is connected with the first configuration signal input end d1, the second configuration signal input end c2 is connected with the first configuration signal output end c1, and the processor 3, the bluetooth module 1 and the WIFI module 2 are all connected with the power module 4.
In specific implementation, the power module 4 provides electric energy for the bluetooth module 1, the WIFI module 2 and the processor 3, the bluetooth module 1 is wirelessly connected with the distribution automation terminal and is configured to obtain communication parameters stored in the distribution automation terminal and send the communication parameters to the processor 2, the processor 2 receives the communication parameters through the second communication parameter receiving terminal a2 and sends the received communication parameters to the WIFI module 2 after generating a signal to be configured, the WIFI module 2 is wirelessly connected with the mobile terminal, the WIFI module 2 receives the signal to be configured through the first configuration signal input terminal d1 and sends the signal to be configured to the mobile terminal, the WIFI module 2 is further configured to receive a configuration signal after configuration processing of the mobile terminal, the WIFI module 2 sends the configuration signal to the processor 3 through the first configuration signal output terminal c1, the processor 3 generates configured communication parameters according to the configuration signal and sends the configured communication parameters to the bluetooth module 1 through the second communication parameter output terminal b2, the bluetooth module 1 sends the received configured communication parameters to the distribution automation terminal equipment to replace the original communication parameters. Realize distribution automation terminal and mobile terminal's wireless connection through communication device, need not adopt the distribution extension line to connect again, reduce distribution automation terminal's fortune dimension degree of difficulty, fortune dimension personnel can carry out remote control through mobile terminals such as cell-phone, panel computer, need not to have a power failure and handle, need not additionally to set up special intelligent terminal to improve distribution automation terminal fortune dimension efficiency, reduce distribution automation terminal fortune dimension cost.
It should be noted that, the operation and maintenance personnel can implement operations such as remote diagnosis, analysis, maintenance, upgrade and the like on the field device without on-site debugging by installing the APP on the mobile terminal such as a mobile phone or a tablet computer, and the expenditure of manpower and financial resources is saved.
Referring to fig. 2, which is a schematic circuit diagram of an embodiment of a power module of a communication device according to the present invention, as shown in fig. 1 and 2, the power module includes a battery 41 and a power management unit 42;
the battery 41 is connected to the power management unit 42, and the power management unit 42 is connected to the processor 3.
Further, the power management unit 42 is formed by using the chip NCP1529 and its peripheral circuits.
Further, the processor is formed by using a chip STM32F103CBT6 and peripheral circuits thereof.
Referring to fig. 3, which is a schematic circuit diagram of an embodiment of the bluetooth module of the communication device according to the present invention, as shown in fig. 1 and fig. 3, the communication device further includes a function key module 5, the function key module 5 is connected to the processor 3, the processor 3 further includes a first control signal output terminal g and a second control signal output terminal h, the bluetooth module 1 further includes a first control signal input terminal e, and the WIFI module 2 further includes a second control signal input terminal f;
the first control signal output terminal g is connected with the first control signal input terminal e, and the second control signal output terminal h is connected with the second control signal input terminal f.
It should be noted that, the operation and maintenance personnel set up the working signal through the function key module 5, and the processor 3 receives the working signal sent by the function key module 5, and controls the start and stop of the bluetooth module 1 and the WIFI module 2 according to the working signal.
Further, the bluetooth module 1 further includes a bluetooth chip U2, a first resistor R2, a second resistor R3, a first switch Q1 and a first capacitor, the bluetooth chip U2 includes a data receiving terminal RX1, a data transmitting terminal TX1 and a power supply terminal VCC 1;
the data receiving end RX1 of the Bluetooth chip U2 is connected with a first communication parameter input end b1, and the data transmitting end RX1 of the Bluetooth chip U2 is connected with a first communication parameter output end a 1;
a power supply terminal VCC1 of the bluetooth chip U2 is respectively connected with a first terminal of a first switch tube Q1 and a first terminal of a first capacitor C2, a second terminal of the first capacitor C2 is grounded, a second terminal of the first switch tube Q1 is connected to a power supply VDD1, a control terminal of the first switch tube Q1 is respectively connected with a first terminal of a first resistor R2 and a first terminal of a second resistor R3, a second terminal of the first resistor R2 is connected with a first control signal input terminal e, and a second terminal of the second resistor R3 is connected to the power supply VDD 1.
It should be noted that the bluetooth module 1 adopts a chip HY-40R204C, and when the first control signal input end e inputs a high level, the first switch tube Q1 is turned on to supply power to the bluetooth chip U2; when the first control signal input end e inputs a low level, the first switch tube Q1 is cut off to stop supplying power to the Bluetooth chip U2, so that the power supply of the Bluetooth module 1 can be turned off at any time, and the power supply is saved.
Preferably, the first switch transistor Q1 is an N-channel MOS transistor, a drain of the N-channel MOS transistor is a first end of the first switch transistor Q1, a source of the N-channel MOS transistor is a second end of the first switch transistor Q1, and a gate of the N-channel MOS transistor is a control end of the first switch transistor Q1.
Referring to fig. 4, which is a schematic circuit diagram of an embodiment of a WIFI module of the communications apparatus provided in the present invention, as shown in fig. 1 and fig. 4, the WIFI module 2 further includes a WIFI chip U3, a third resistor R22, a fourth resistor R23, a second switch tube Q21 and a second capacitor C22, and the WIFI chip U3 includes a data receiving terminal RX2, a data transmitting terminal TX2 and a power terminal VCC 2;
a data receiving end RX2 of the WIFI chip U3 is connected with a first configuration signal input end d1, and a data transmitting end TX2 of the WIFI chip U3 is connected with a first configuration signal output end C1;
a power supply terminal VCC2 of the WIFI chip U3 is connected to the first end of the second switch tube Q21 and the first end of the second capacitor C22, the second end of the second capacitor C22 is grounded, the second end of the second switch tube Q21 is connected to a power supply VDD1, the control terminal of the second switch tube Q21 is connected to the first end of the third resistor R22 and the first end of the fourth resistor R23, the second end of the third resistor R22 is connected to the second control signal input terminal f, and the second end of the fourth resistor R23 is connected to the power supply VDD 1.
It should be noted that the WIFI module U3 uses an Ai-Thinker (Anxinke) ESP-12E WIFI module, and when the second control signal input terminal f inputs a high level, the second switching tube Q21 is turned on to supply power to the WIFI module U3; when the second control signal input end f inputs a low level, the second switch tube Q21 stops supplying power to the WIFI module U3, so that the power supply of the WIFI module U3 can be turned off at any time, and the power supply is saved.
Preferably, the second switch transistor Q21 is an N-channel MOS transistor, a drain of the N-channel MOS transistor is a first end of the second switch transistor Q21, a source of the N-channel MOS transistor is a second end of the second switch transistor Q21, and a gate of the N-channel MOS transistor is a control end of the second switch transistor Q21.
Referring to fig. 5, the present invention provides a circuit block diagram of an embodiment of a remote operation and maintenance system for a power distribution terminal.
The embodiment provides a remote operation and maintenance system for a power distribution terminal, which comprises a power distribution automation terminal 21, a communication device 22 and a mobile terminal 23;
the communication device 22 is the one described in the previous embodiment;
the communication device 22 is wirelessly connected with the distribution automation terminal 21 through the bluetooth module 1, and the communication device 22 is wirelessly connected with the mobile terminal 23 through the WIFI module 2.
Further, the distribution automation terminal 21 is a feeder terminal device. The mobile terminal can be a mobile phone, a tablet computer and the like.
It should be noted that, in the communication device and the remote operation and maintenance system of the power distribution terminal provided in the foregoing embodiment, the first switch Q1 is an N-channel MOS transistor, and the second switch Q21 is an N-channel MOS transistor, which is only one implementation manner among them, in other implementation manners, a P-channel MOS transistor or other three-terminal control switch devices or their derivatives may be replaced, and in different application occasions, the selection and the setting are reasonably selected and set according to requirements such as power consumption, cost, driving power of an actual circuit, parameter matching with a driving control element of the switch transistor, and the selection and the setting of the switch transistor are common design processes in the prior art, and are not described herein again.
The utility model provides a communication device and distribution terminal remote operation and maintenance system, power module provides the electric energy for bluetooth module, WIFI module and treater, bluetooth module and distribution automation terminal wireless connection, be used for acquireing the communication parameter that stores in the distribution automation terminal and send to the treater, the treater generates the communication parameter that receives and waits to dispose the signal and sends to the WIFI module, the WIFI module is connected with the mobile terminal wireless, be used for sending to wait to dispose the signal to the mobile terminal, the WIFI module still is used for receiving the configuration signal after the mobile terminal configuration processing, the WIFI module sends the signal after the configuration to the treater, the treater generates the communication parameter after the configuration according to the configuration signal and sends to distribution automation terminal equipment through bluetooth module, substituted former communication parameter realizes the wireless connection of distribution terminal and mobile terminal through communication device, need not adopt the distribution extension line to connect again, reduce the fortune dimension degree of difficulty at distribution automation terminal, fortune dimension personnel can carry out remote control through mobile terminal such as cell-phone, panel computer, need not to have a power failure and handle, need not additionally to set up special intelligent terminal to improve distribution automation terminal fortune dimension efficiency, reduce distribution automation terminal fortune dimension cost.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.

Claims (9)

1. A communication device is characterized by comprising a Bluetooth module in wireless connection with a distribution automation terminal, a WIFI module in wireless connection with a mobile terminal, a processor and a power supply module;
the Bluetooth module comprises a first communication parameter output end and a first communication parameter input end, the WIFI module comprises a first configuration signal input end and a first configuration signal output end, and the processor comprises a second communication parameter input end, a second communication parameter output end, a second configuration signal output end and a second configuration signal input end;
the first communication parameter output end is connected with the second communication parameter input end, the first communication parameter input end is connected with the second communication parameter output end, the second configuration signal output end is connected with the first configuration signal input end, the second configuration signal input end is connected with the first configuration signal output end, and the processor, the Bluetooth module and the WIFI module are all connected with the power module.
2. The communication device according to claim 1, further comprising a function key module, wherein the function key module is connected to the processor, the processor further comprises a first control signal output terminal and a second control signal output terminal, the bluetooth module further comprises a first control signal input terminal, and the WIFI module further comprises a second control signal input terminal;
the first control signal output end is connected with the first control signal input end, and the second control signal output end is connected with the second control signal input end.
3. The communication device according to claim 2, wherein the bluetooth module further comprises a bluetooth chip, a first resistor, a second resistor, a first switch tube and a first capacitor, the bluetooth chip comprises a data receiving terminal, a data transmitting terminal and a power source terminal;
the data receiving end of the Bluetooth chip is connected with the first communication parameter input end, and the data sending end of the Bluetooth chip is connected with the first communication parameter output end;
the power end of the Bluetooth chip is connected with the first end of the first switch tube and the first end of the first capacitor respectively, the second end of the first capacitor is grounded, the second end of the first switch tube is connected to a power supply, the control end of the first switch tube is connected with the first end of the first resistor and the first end of the second resistor respectively, the second end of the first resistor is connected with the first control signal input end, and the second end of the second resistor is connected to the power supply.
4. The communication device according to claim 2, wherein the WIFI module further comprises a WIFI chip, a third resistor, a fourth resistor, a second switching tube and a second capacitor, and the WIFI chip comprises a data receiving end, a data transmitting end and a power end;
the data receiving end of the WIFI chip is connected with the first configuration signal input end, and the data sending end of the WIFI chip is connected with the first configuration signal output end;
the power end of the WIFI chip is connected with the first end of the second switch tube and the first end of the second capacitor respectively, the second end of the second capacitor is grounded, the second end of the second switch tube is connected to a power supply, the control end of the second switch tube is connected with the first end of the third resistor and the first end of the fourth resistor respectively, the second end of the third resistor is connected with the second control signal input end, and the second end of the fourth resistor is connected to the power supply.
5. The communication device of claim 1, wherein the power module comprises a battery and a power management unit;
the battery is connected with the power management unit, and the power management unit is connected with the processor.
6. The communication device according to claim 5, wherein the power management unit is formed by using a chip NCP1529 and peripheral circuits thereof.
7. A communication apparatus according to any of claims 1 to 6, wherein the processor is formed using a chip STM32F103CBT6 and its peripheral circuits.
8. A remote operation and maintenance system of a power distribution terminal is characterized by comprising a power distribution automation terminal, a communication device and a mobile terminal;
the communication device is according to any one of claims 1 to 7;
the communication device is wirelessly connected with the distribution automation terminal through the Bluetooth module, and the communication device is wirelessly connected with the mobile terminal through the WIFI module.
9. The remote operation and maintenance system of power distribution terminals of claim 8, wherein the power distribution automation terminal is a feeder terminal device.
CN201921668945.5U 2019-10-08 2019-10-08 Communication device and remote operation and maintenance system of power distribution terminal Active CN210744828U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921668945.5U CN210744828U (en) 2019-10-08 2019-10-08 Communication device and remote operation and maintenance system of power distribution terminal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921668945.5U CN210744828U (en) 2019-10-08 2019-10-08 Communication device and remote operation and maintenance system of power distribution terminal

Publications (1)

Publication Number Publication Date
CN210744828U true CN210744828U (en) 2020-06-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921668945.5U Active CN210744828U (en) 2019-10-08 2019-10-08 Communication device and remote operation and maintenance system of power distribution terminal

Country Status (1)

Country Link
CN (1) CN210744828U (en)

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