CN114878875A - Debugging device of distribution automation terminal - Google Patents

Debugging device of distribution automation terminal Download PDF

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Publication number
CN114878875A
CN114878875A CN202210754042.9A CN202210754042A CN114878875A CN 114878875 A CN114878875 A CN 114878875A CN 202210754042 A CN202210754042 A CN 202210754042A CN 114878875 A CN114878875 A CN 114878875A
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China
Prior art keywords
groove
shell
chip
usb
distribution automation
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Granted
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CN202210754042.9A
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Chinese (zh)
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CN114878875B (en
Inventor
赵斌
高明
王学虎
李进
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Jiangsu Daye Intelligent Electrical Co ltd
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Jiangsu Daye Intelligent Electrical Co ltd
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Publication of CN114878875A publication Critical patent/CN114878875A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/02General constructional details
    • G01R1/04Housings; Supporting members; Arrangements of terminals

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)

Abstract

The invention discloses a debugging device of a power distribution automation terminal, which comprises a module assembly, wherein the module assembly comprises a connecting module, a protective shell, a closed door, a connecting piece and a clamping block, the protective shell and the clamping block are respectively connected with the connecting module, the closed door is connected with the protective shell, one end of the connecting piece is connected with the closed door, and the other end of the connecting piece is connected with the connecting module. The interface protection that this device will debug the use is inside the protective housing, avoids causing the going on that damages the follow-up work of influence.

Description

Debugging device of distribution automation terminal
Technical Field
The invention relates to the technical field of power distribution equipment debugging, in particular to a debugging device of a power distribution automation terminal.
Background
When need carrying out distribution automation terminal product debugging at present, need use the computer to connect distribution automation terminal, USB interface communication by the computer converts 232 interface communication into, refabrication special signal line, change RJ45 interface connection distribution automation terminal by 232 interface, daily carrying and cause special signal line to lose the damage in the work easily, USB interface and RJ45 interface do not have fixed protector to cause the damage easily, field work will not waste manpower and valuable electric wire netting power supply time.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments, and in this section as well as in the abstract and the title of the invention of this application some simplifications or omissions may be made to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made keeping in mind the above problems occurring in the prior art and/or the problems occurring in the prior art.
Therefore, the technical problems to be solved by the invention are that a special signal line is easy to lose and damage in daily carrying and work, and a USB interface and an RJ45 interface are easy to damage without fixed protection devices.
In order to solve the technical problems, the invention provides the following technical scheme: a debugging device of a power distribution automation terminal comprises a module assembly, wherein the module assembly comprises a connecting module, a protective shell, a closed door, a connecting piece and a clamping block, the protective shell and the clamping block are respectively connected with the connecting module, the closed door is connected with the protective shell, one end of the connecting piece is connected with the closed door, and the other end of the connecting piece is connected with the connecting module;
the conversion module comprises a USB-HUB chip, a USB-to-TTL chip and a TTL-to-232 chip, wherein the USB-HUB chip is connected with the USB-to-TTL chip, the USB-to-TTL chip is connected with the TTL-to-232 chip, and the USB-HUB chip, the USB-to-TTL chip and the TTL-to-232 chip are arranged in the connection module;
the connecting module comprises a USB interface and an RJ45 interface, the USB interface is arranged on the side face of the connecting module, the RJ45 interface is arranged on the other side face of the connecting module, the USB-HUB chip is connected with the USB interface, and the RJ45 interface is connected with the TTL-to-232 chip.
As a preferable aspect of the debugging device of the distribution automation terminal of the present invention, wherein: the connecting module further comprises two protection grooves, the protection grooves are formed in the side faces of the connecting module, and the protection grooves are symmetrically formed along the central line of the connecting module.
As a preferable aspect of the debugging device of the distribution automation terminal of the present invention, wherein: the protective housing includes casing groove, spring slip post and casing stopper, the casing groove set up in the protective housing upper end, the spring slip post set up in the protective housing side, the casing stopper set up in the protective housing lower extreme.
As a preferable aspect of the debugging device of the distribution automation terminal of the present invention, wherein: the protection groove includes protection casing sliding tray, connecting rod sliding tray and intercommunication groove, the protection casing sliding tray the connecting rod sliding tray with the intercommunication groove set up in on the protection inslot wall, the protective housing is arranged in the protection inslot, the spring sliding column is arranged in the protection casing sliding tray.
As a preferable aspect of the debugging device of the distribution automation terminal of the present invention, wherein: the inner wall of the shell groove is provided with a connecting rod groove, a rotating rod is arranged in the connecting rod groove, and the closed door is hinged to the rotating rod.
As a preferable aspect of the debugging device of the distribution automation terminal of the present invention, wherein: the shell limiting block comprises a limiting groove and a limiting inclined plane, the limiting groove is formed in the upper end of the shell limiting block, and the limiting inclined plane is formed in the side face of the shell limiting block.
As a preferable aspect of the debugging device of the distribution automation terminal of the present invention, wherein: the side face of the closed door is provided with a closed connecting plate groove, and a closed connecting rod is arranged in the closed connecting plate groove.
As a preferable aspect of the debugging device of the distribution automation terminal of the present invention, wherein: the connecting piece includes the connecting plate and connects the slide bar, connect the slide bar set up in the connecting plate side, the connecting plate with it is articulated to seal the connecting rod, connect the slide bar and arrange in the connecting rod sliding tray.
As a preferable aspect of the debugging device of the distribution automation terminal of the present invention, wherein: the upper end of the connecting module is provided with a clamping groove, the clamping groove is communicated with the communicating groove, and the clamping block is arranged in the clamping groove.
As a preferable aspect of the debugging device of the distribution automation terminal of the present invention, wherein: the clamping block comprises a lifting block, a clamping spring plate and a clamping inclined plane, the lifting block is arranged at the upper end of the clamping block, the clamping spring plate is arranged on the side face of the clamping block, and the clamping inclined plane is arranged at the lower end of the clamping block.
The invention has the beneficial effects that: the interface protection that this device will debug the use is inside the protective housing, avoids causing the going on that damages the follow-up work of influence.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
fig. 1 is a schematic view of an assembly structure of a debugging device of a distribution automation terminal according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a connection structure of a debugging device component of a distribution automation terminal according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional structure diagram of a connection module in a debugging device of a distribution automation terminal according to an embodiment of the present invention;
fig. 4 is a schematic cross-sectional structure view of a protection cover in a commissioning apparatus of a distribution automation terminal according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a sealing door in a debugging device of a distribution automation terminal according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a block in a debugging device of a distribution automation terminal according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Next, the present invention will be described in detail with reference to the drawings, wherein the cross-sectional views illustrating the structure of the device are not enlarged partially according to the general scale for convenience of illustration when describing the embodiments of the present invention, and the drawings are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Example 1
Referring to fig. 1 to 4, the present embodiment provides a debugging apparatus of a distribution automation terminal, including a module assembly 100.
The module assembly 100 comprises a connecting module 101, a protective shell 102, a closed door 103, a connecting piece 104 and a clamping block 105, wherein the protective shell 102 and the clamping block 105 are respectively connected with the connecting module 101, the closed door 103 is connected with the protective shell 102, one end of the connecting piece 104 is connected with the closed door 103, the other end of the connecting piece is connected with the connecting module 101, and the protective shell 102, the closed door 103, the connecting piece 104 and the clamping block 105 are respectively provided with two.
Conversion module, change TTL chip and TTL including USB-HUB chip, USB and change 232 chips, USB-HUB chip changes the TTL chip with USB and is connected, and USB changes the TTL chip and changes 232 chip with the TTL and be connected, and USB-HUB chip, USB change TTL chip and TTL change 232 chip and install in link module 101, and USB changes the TTL chip and TTL changes 232 chip and is provided with two.
The connecting module 101 includes a USB interface 101b and an RJ45 interface 101c, the USB interface 101b is disposed on a side surface of the connecting module 101, the RJ45 interface 101c is disposed on the other side surface, the USB-HUB chip is connected to the USB interface 101b, and the RJ45 interface 101c is connected to the TTL interface 232 chip.
The operating principle is that the USB-HUB chip changes 1 way USB into 2 ways USB for use, and USB changes TTL chip and changes 2 ways USB signals into TTL signal, and TTL changes 232 chips change the TTL signal into 232 signal, and RJ45 interface 101c passes through the net twine at last and is connected the communication with distribution automation terminal.
The connection module 101 further includes two protection grooves 101a, the protection grooves 101a are disposed on the side surfaces of the connection module 101, and the two protection grooves 101a are symmetrically disposed along the center line of the connection module 101.
The protective shell 102 includes a shell groove 102a, a spring sliding column 102b and a shell stopper 102c, the shell groove 102a is disposed at the upper end of the protective shell 102, the spring sliding column 102b is disposed at the side of the protective shell 102, the shell stopper 102c is disposed at the lower end of the protective shell 102, and the spring sliding columns 102b are disposed in plural.
The protective groove 101a comprises a protective shell sliding groove 101a-1, a connecting rod sliding groove 101a-2 and a communicating groove 101a-3, the protective shell sliding groove 101a-1, the connecting rod sliding groove 101a-2 and the communicating groove 101a-3 are arranged on the inner wall of the protective groove 101a, the protective shell sliding grooves 101a-1 are arranged in a plurality, and the connecting rod sliding grooves 101a-2 are symmetrically arranged in two along the central line of the protective groove 101 a.
The communicating grooves 101a-3 in the two protection grooves 101a which are symmetrically arranged are communicated.
The protective shell 102 is disposed in the protective slot 101a, and the spring sliding post 102b is disposed in and fixedly connected to the protective shell sliding slot 101 a-1.
The inner wall of the housing groove 102a is provided with a connecting rod groove 102a-1, the connecting rod groove 102a-1 is internally provided with a rotating rod 102a-2, and the closing door 103 is hinged with the rotating rod 102 a-2.
When the device is not used, the protective shell 102 shields the USB interface 101b and the RJ45 interface 101c, and the closed door 103 shields the shell groove 102a to avoid the damage and the influence on the use in the carrying process.
When the USB interface debugging device is used, debugging work can be carried out only by pushing the protective shell 102 to expose the USB interface 101b and the RJ45 interface 101 c.
Example 2
Referring to fig. 1 to 6, a second embodiment of the present invention is provided, which is based on the previous embodiment and provides an implementation manner of a debugging apparatus of a distribution automation terminal.
The shell stopper 102c includes a stopper groove 102c-1 and a stopper inclined surface 102c-2, the stopper groove 102c-1 is disposed at the upper end of the shell stopper 102c, and the stopper inclined surface 102c-2 is disposed at the side of the shell stopper 102 c.
The side of the closing door 103 is provided with a closing connection plate slot 103a, and a closing connection rod 103b is arranged in the closing connection plate slot 103 a.
The connecting piece 104 comprises a connecting plate 104a and a connecting sliding rod 104b, the connecting sliding rod 104b is arranged on the side surface of the connecting plate 104a, the connecting plate 104a is hinged with the closed connecting rod 103b, and the connecting sliding rod 104b is arranged in the connecting rod sliding groove 101 a-2.
The upper end of the connecting module 101 is provided with an engaging groove 101d, the engaging groove 101d is communicated with the communicating groove 101a-3, and the engaging block 105 is arranged in the engaging groove 101 d.
The clamping block 105 comprises a lifting block 105a, two clamping spring plates 105b and two clamping inclined surfaces 105c, the lifting block 105a is arranged at the upper end of the clamping block 105, the clamping spring plates 105b are arranged on the side surfaces of the clamping block 105, the two clamping spring plates 105b are symmetrically arranged along the central line of the clamping block 105, and the clamping inclined surfaces 105c are arranged at the lower end of the clamping block 105.
It should be noted that the link sliding groove 101a-2 is constituted by a horizontal groove 101a-21 and an inclined groove 101 a-22.
When the device is not used, the USB interface 101b and the RJ45 interface 101c are shielded by the protective shell 102, the shell groove 102a is shielded by the closed door 103 to avoid damage and influence in the carrying process, and the connecting sliding rod 104b is positioned in the inclined grooves 101a-22 to provide a pulling force for the closed door 103, so that the closed door 103 cannot rotate.
When the protective shell 102 is used, a debugger pushes the protective shell 102, the protective shell 102 moves in the protective groove 101a, the closing door 103 moves along with the protective shell 102 when the protective shell 102 moves, the connecting sliding rod 104b slides in the inclined groove 101a-22 under the action of pushing force and pushes the closing door 103 to rotate and not to shield the shell groove 102a, and when the connecting sliding rod 104b slides into the horizontal groove 101a-21 after the protective shell 102 moves to a certain position, the connecting plate 104a does not push the closing door 103 to rotate and rotate.
The protective shell 102 is continuously pushed to move, the limiting inclined surface 102c-2 is moved to a certain position to be in contact with the clamping inclined surface 105c, the clamping block 105 is pushed to move upwards by extrusion, and the device is opened and fixed to be used when the clamping inclined surface 105c is aligned with the limiting groove 102c-1 and is inserted into the limiting groove 102c-1 under the action of the clamping spring plate 105 b.
After debugging is finished, the lifting block 105a is pulled only to release the limit of the clamping inclined plane 105c on the limit groove 102c-1, and the device is restored to the unused state under the action of the spring sliding column 102 b.
This device convenient to carry, effectual protection debugging module does not receive the damage, and easy operation is convenient during the use, improves work efficiency, need progressively assemble when having avoided traditional debugging device to use, carries the problem that the in-process loses easily and causes the damage moreover.
It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.
Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).
It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims (10)

1. The utility model provides a distribution automation terminal's debugging device which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
the module assembly (100) comprises a connecting module (101), a protective shell (102), a closed door (103), a connecting piece (104) and a clamping block (105), wherein the protective shell (102) and the clamping block (105) are respectively connected with the connecting module (101), the closed door (103) is connected with the protective shell (102), one end of the connecting piece (104) is connected with the closed door (103), and the other end of the connecting piece (104) is connected with the connecting module (101);
the conversion module comprises a USB-HUB chip, a USB transfer TTL chip and a TTL transfer 232 chip, wherein the USB-HUB chip is connected with the USB transfer TTL chip, the USB transfer TTL chip is connected with the TTL transfer 232 chip, and the USB-HUB chip, the USB transfer TTL chip and the TTL transfer 232 chip are arranged in the connection module (101);
the connecting module (101) comprises a USB interface (101 b) and an RJ45 interface (101 c), the USB interface (101 b) is arranged on the side face of the connecting module (101), the RJ45 interface (101 c) is arranged on the other side face, the USB-HUB chip is connected with the USB interface (101 b), and the RJ45 interface (101 c) is connected with the TTL-to-232 chip.
2. The commissioning device of a distribution automation terminal of claim 1, wherein: the connecting module (101) further comprises two protecting grooves (101 a), the protecting grooves (101 a) are formed in the side face of the connecting module (101), and the protecting grooves (101 a) are symmetrically formed in the center line of the connecting module (101).
3. The commissioning device of a distribution automation terminal of claim 2, wherein: the protective shell (102) comprises a shell groove (102 a), a spring sliding column (102 b) and a shell limiting block (102 c), the shell groove (102 a) is formed in the upper end of the protective shell (102), the spring sliding column (102 b) is formed in the side face of the protective shell (102), and the shell limiting block (102 c) is formed in the lower end of the protective shell (102).
4. The commissioning device of a distribution automation terminal of claim 3, wherein: the protective groove (101 a) comprises a protective shell sliding groove (101 a-1), a connecting rod sliding groove (101 a-2) and a communicating groove (101 a-3), the protective shell sliding groove (101 a-1), the connecting rod sliding groove (101 a-2) and the communicating groove (101 a-3) are formed in the inner wall of the protective groove (101 a), the protective shell (102) is arranged in the protective groove (101 a), and the spring sliding column (102 b) is arranged in the protective shell sliding groove (101 a-1).
5. The commissioning device of a distribution automation terminal of claim 4, wherein: a connecting rod groove (102 a-1) is formed in the inner wall of the shell groove (102 a), a rotating rod (102 a-2) is arranged in the connecting rod groove (102 a-1), and the closing door (103) is hinged to the rotating rod (102 a-2).
6. The commissioning device of a distribution automation terminal of claim 5, wherein: the shell limiting block (102 c) comprises a limiting groove (102 c-1) and a limiting inclined plane (102 c-2), the limiting groove (102 c-1) is arranged at the upper end of the shell limiting block (102 c), and the limiting inclined plane (102 c-2) is arranged on the side face of the shell limiting block (102 c).
7. The commissioning device of a distribution automation terminal of claim 6, wherein: the side of the closed door (103) is provided with a closed connecting plate groove (103 a), and a closed connecting rod (103 b) is arranged in the closed connecting plate groove (103 a).
8. The commissioning device of a distribution automation terminal of claim 7, wherein: the connecting piece (104) comprises a connecting plate (104 a) and a connecting sliding rod (104 b), the connecting sliding rod (104 b) is arranged on the side surface of the connecting plate (104 a), the connecting plate (104 a) is hinged with the closed connecting rod (103 b), and the connecting sliding rod (104 b) is arranged in the connecting rod sliding groove (101 a-2).
9. The commissioning device of a distribution automation terminal of claim 8, wherein: the upper end of the connecting module (101) is provided with a clamping groove (101 d), the clamping groove (101 d) is communicated with the communicating groove (101 a-3), and the clamping block (105) is arranged in the clamping groove (101 d).
10. The commissioning device of a distribution automation terminal according to claim 8 or 9, characterised in that: the clamping block (105) comprises a lifting block (105 a), a clamping spring plate (105 b) and a clamping inclined surface (105 c), the lifting block (105 a) is arranged at the upper end of the clamping block (105), the clamping spring plate (105 b) is arranged on the side surface of the clamping block (105), and the clamping inclined surface (105 c) is arranged at the lower end of the clamping block (105).
CN202210754042.9A 2022-06-30 2022-06-30 Debugging device of distribution automation terminal Active CN114878875B (en)

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Publication number Priority date Publication date Assignee Title
CN209608667U (en) * 2019-06-25 2019-11-08 南方电网科学研究院有限责任公司 Safety device at distribution network terminal
CN110927489A (en) * 2019-11-27 2020-03-27 广州思泰信息技术有限公司 Distribution automation feeder terminal test system and method
CN111044815A (en) * 2019-12-02 2020-04-21 国网浙江嘉善县供电有限公司 On-spot detection device of multi-functional automatic distribution equipment
CN211907732U (en) * 2020-05-22 2020-11-10 四川华东电气集团电力科技有限公司 Interface conversion protection device of relay protection tester
CN212905214U (en) * 2020-09-22 2021-04-06 国网江苏省电力有限公司连云港供电分公司 Portable power distribution terminal testing arrangement
CN213398818U (en) * 2020-09-14 2021-06-08 上海智势电子科技有限公司 Circuit board tester with dustproof function
CN213780170U (en) * 2020-12-07 2021-07-23 广西国桂电气有限公司 Transformer direct current resistance tester
CN113156271A (en) * 2021-05-21 2021-07-23 泰州苏迹电力科技有限公司 Portable multiport distribution network automatic calibrator with folding protection mechanism
CN214252409U (en) * 2021-01-19 2021-09-21 广州地铁集团有限公司 Transient current on-line monitoring device
CN114325437A (en) * 2022-01-04 2022-04-12 江苏安方电力科技有限公司 Power distribution automation terminal testing device and method

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN209608667U (en) * 2019-06-25 2019-11-08 南方电网科学研究院有限责任公司 Safety device at distribution network terminal
CN110927489A (en) * 2019-11-27 2020-03-27 广州思泰信息技术有限公司 Distribution automation feeder terminal test system and method
CN111044815A (en) * 2019-12-02 2020-04-21 国网浙江嘉善县供电有限公司 On-spot detection device of multi-functional automatic distribution equipment
CN211907732U (en) * 2020-05-22 2020-11-10 四川华东电气集团电力科技有限公司 Interface conversion protection device of relay protection tester
CN213398818U (en) * 2020-09-14 2021-06-08 上海智势电子科技有限公司 Circuit board tester with dustproof function
CN212905214U (en) * 2020-09-22 2021-04-06 国网江苏省电力有限公司连云港供电分公司 Portable power distribution terminal testing arrangement
CN213780170U (en) * 2020-12-07 2021-07-23 广西国桂电气有限公司 Transformer direct current resistance tester
CN214252409U (en) * 2021-01-19 2021-09-21 广州地铁集团有限公司 Transient current on-line monitoring device
CN113156271A (en) * 2021-05-21 2021-07-23 泰州苏迹电力科技有限公司 Portable multiport distribution network automatic calibrator with folding protection mechanism
CN114325437A (en) * 2022-01-04 2022-04-12 江苏安方电力科技有限公司 Power distribution automation terminal testing device and method

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