CN111999675A - Single-phase grounding monitoring system based on power distribution network - Google Patents
Single-phase grounding monitoring system based on power distribution network Download PDFInfo
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- CN111999675A CN111999675A CN202010885000.XA CN202010885000A CN111999675A CN 111999675 A CN111999675 A CN 111999675A CN 202010885000 A CN202010885000 A CN 202010885000A CN 111999675 A CN111999675 A CN 111999675A
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- piston
- magnetic bottle
- distribution network
- monitoring system
- power distribution
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
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- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The invention relates to a single-phase grounding monitoring system based on a power distribution network, wherein a first support magnetic bottle rotating along a hinge seat is arranged on the hinge seat, a second support magnetic bottle is also arranged on the hinge seat, a first electric connecting rod and a second electric connecting rod are connected between the first support magnetic bottle and the second support magnetic bottle, a third electric connecting rod is connected between the second support magnetic bottle and a third support magnetic bottle, an electrifying signal transmitter is arranged on the third support magnetic bottle, a signal amplifier is arranged at the upper end of the installation seat, a Bluetooth signal transmitting box is arranged on one side of the signal amplifier, a signal transmission rod is arranged at the upper end of the Bluetooth signal transmitting box, an electrifying signal receiver corresponding to the electrifying signal transmitter is arranged at the upper end of the signal transmission rod, an electric conducting movable rod is arranged at the upper end of a driving structure, an electric connecting switch is arranged at one end of the electric conducting movable rod, which is far away. The invention realizes the real-time monitoring of the single-phase grounding electrifying grounding signal of the power distribution network.
Description
Technical Field
The invention relates to the technical field of power equipment, in particular to a single-phase grounding monitoring system based on a power distribution network.
Background
The majority of medium and low voltage power distribution networks in China are in a small current grounding mode, wherein 66kV and 35kV power networks are mainly in a neutral point arc suppression coil grounding mode, 6kV to 10kV power networks are partially in a neutral point ungrounded mode, and are partially in a neutral point arc suppression coil grounding mode.
In the single-phase ground connection in-process of distribution network commonly used at present, the degree of difficulty of monitoring is great, and the stability of monitoring is relatively poor, so need urgently to develop a single-phase ground connection monitoring system based on distribution network and solve the problem among the prior art.
Disclosure of Invention
The invention aims to provide a single-phase grounding monitoring system based on a power distribution network, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a single-phase grounding monitoring system based on a power distribution network comprises a support, wherein a mounting seat is arranged at the upper end of the support, a hinged seat is arranged on the mounting seat, a first support magnetic bottle rotating along the hinged seat is arranged on the hinged seat, a second support magnetic bottle is further arranged on the hinged seat, a first electric connecting rod and a second electric connecting rod are connected between the first support magnetic bottle and the second support magnetic bottle, a first rotating shaft is connected between the first electric connecting rod and the second electric connecting rod, a third support magnetic bottle is arranged on the mounting seat, a third electric connecting rod is connected between the second support magnetic bottle and the third support magnetic bottle, an electrified signal transmitter is arranged on the third support magnetic bottle, a signal amplifier is arranged at the upper end of the mounting seat, a Bluetooth signal transmitting box is arranged on one side of the signal amplifier, and a signal transmission rod is arranged at the upper end of the Bluetooth signal transmitting box, the improved transformer substation is characterized in that an electrifying signal receiver corresponding to the electrifying signal transmitter is arranged at the upper end of the signal transmission rod, an earthing box is arranged on one side of the support, a driving mechanism is arranged at the upper end of the earthing box, an electrically conductive movable rod is arranged at the upper end of the driving mechanism, an electric switch is arranged at one end, away from the driving mechanism, of the electrically conductive movable rod, and an inserting slot for inserting the electric switch is formed in the second support magnetic bottle.
As a further scheme of the invention: and a movable groove for the first power connection connecting rod to move is formed in the second support magnetic bottle.
As a further scheme of the invention: and a guide box for limiting the rotation of the conductive movable rod is arranged on one side of the support.
As a further scheme of the invention: the upper end and the lower end of the guide box are both provided with limiting sleeves for limiting the rotation of the conductive movable rod.
As a further scheme of the invention: the guide box is internally provided with a first installation cavity, a first installation plate is arranged in the first installation cavity, a second rotating shaft is arranged on the first installation plate, a guide roller is arranged on the periphery of the second rotating shaft, and the guide roller is in contact with the conductive movable rod.
As a further scheme of the invention: and a buffer rubber sleeve is arranged on the periphery of the guide roller.
As a further scheme of the invention: the bottom is equipped with first piston in the first installation cavity, one side that first piston is close to first mounting panel is equipped with first piston axle, one side that first piston axle is close to first mounting panel is equipped with the second piston, the second piston is fixed on first mounting panel, be equipped with first spring between first piston and the second piston, first spring cup joints the periphery at first piston axle.
As a further scheme of the invention: the second pillar magnetic bottle is arranged in the slot and is symmetrically provided with a pair of second mounting plates relative to the slot, the opposite side of the second mounting plates is provided with a conductive plate, and the conductive plate is connected with an electric connection wire.
As a further scheme of the invention: one side that the second mounting panel is close to the current conducting plate is equipped with the third piston, one side that the third piston is close to the current conducting plate is equipped with the second piston axle, the second piston axle is fixed at the current conducting plate.
As a further scheme of the invention: and a second spring is arranged between the third piston and the conductive plate and sleeved on the periphery of the second piston shaft.
Compared with the prior art, the invention has the beneficial effects that: when in use, the first support magnetic bottle and the second support magnetic bottle are externally connected with a grounding wire, and the angle between the first electric connecting rod and the second electric connecting rod is adjusted, so that the adjustment of the distance between the first support magnetic bottle and the second support magnetic bottle is convenient, in addition, the electric connection with the second support magnetic bottle is realized by the electric conductive movable rod, the electric conductive movable rod is driven to rotate by the driving mechanism, the electric conductive movable rod rotates to drive the electric inserting switch to rotate, the electric inserting switch enters the slot after rotating, the electric connection between the second support magnetic bottle and the electric conductive movable rod is realized, the third support magnetic bottle is electrically connected with the second support magnetic bottle by the third electric connecting rod, the electrifying signal receiver receives the electrifying signal from the electrifying signal transmitter, the signal transmission rod transmits the electrifying grounding signal to the signal amplifier, and the signal amplifier transmits the condition of the electrifying grounding signal to the remote control end by the Bluetooth signal transmitting box, therefore, real-time monitoring of the single-phase grounded electrifying grounding signal of the power distribution network is realized.
Other features and advantages of the present invention will be disclosed in more detail in the following detailed description of the invention and the accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of a single-phase grounding monitoring system based on a power distribution network according to the present invention;
FIG. 2 is a cross-sectional view of a guide box in the single-phase grounding monitoring system based on the power distribution network according to the present invention;
fig. 3 is a partial cross-sectional view of a second pillar magnetic bottle in the single-phase grounding monitoring system based on the power distribution network according to the invention.
In the figure: 1. a support; 2. a ground tank; 3. a conductive movable rod; 4. connecting a power switch; 5. a mounting seat; 6. a first pillar magnetic bottle; 7. a second pillar magnetic bottle; 8. a second power connection link; 9. a first power connection link; 10. a third power connection link; 11. a third pillar magnetic bottle; 12. a power-on signal transmitter; 13. a signal amplifier; 14. a signal transmission rod; 15. a power-on signal receiver; 16. a movable groove; 17. a first rotating shaft; 18. a guide box; 19. a limiting sleeve; 20. a first mounting cavity; 21. a first piston; 22. a first piston shaft; 23. a first spring; 24. a second piston; 25. a first mounting plate; 26. a second rotating shaft; 27. a guide roller; 28. a buffer rubber sleeve; 29. a Bluetooth signal transmitting box; 30. a drive mechanism; 32. a slot; 33. a second mounting plate; 34. a third piston; 35. a second spring; 36. a second piston shaft; 37. a conductive plate; 38. and connecting the electric lead.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 3, in an embodiment of the present invention, a single-phase ground monitoring system based on a power distribution network includes a bracket 1, a mounting base 5 is disposed at an upper end of the bracket 1, a hinge base is mounted on the mounting base 5, a first pillar magnetic bottle 6 rotating along the hinge base is disposed on the hinge base, a second pillar magnetic bottle 7 is further disposed on the hinge base, a first power connection link 9 and a second power connection link 8 are connected between the first pillar magnetic bottle 6 and the second pillar magnetic bottle 7, a first rotating shaft 17 is connected between the first power connection link 9 and the second power connection link 8, a third pillar magnetic bottle 11 is disposed on the mounting base 5, a third power connection link 10 is connected between the second pillar magnetic bottle 7 and the third pillar magnetic bottle 11, a power-on signal transmitter 12 is disposed on the third pillar magnetic bottle 11, a signal amplifier 13 is disposed at an upper end of the mounting base 5, one side of signal amplifier 13 is equipped with bluetooth signal transmission case 29, bluetooth signal transmission case 29 upper end is equipped with signal transmission pole 14, signal transmission pole 14 upper end is equipped with the circular telegram signal receiver 15 that corresponds the setting with circular telegram signal transmitter 12, 1 one side of support is equipped with ground connection case 2, 2 upper ends of ground connection case are equipped with actuating mechanism 30, the actuating structure upper end is equipped with electrically conductive movable rod 3, the one end that actuating mechanism 30 was kept away from to electrically conductive movable rod 3 is equipped with connects electric switch 4, be equipped with on the second pillar magnetism bottle 7 and supply electric switch 4 male slot 32. When the device is used, the first support magnetic bottle 6 and the second support magnetic bottle 7 are externally connected with a grounding wire, the angle between the first electric connecting rod 9 and the second electric connecting rod 8 is adjusted, the adjustment of the distance between the first support magnetic bottle 6 and the second support magnetic bottle 7 is convenient, in addition, the electric connection with the second support magnetic bottle 7 is realized by the electric conductive movable rod 3, the electric conductive movable rod 3 is driven to rotate by the driving mechanism 30, the electric insertion switch is driven to rotate by the rotation of the electric conductive movable rod 3, the electric insertion switch enters the slot 32 after rotating, the electric connection between the second support magnetic bottle 7 and the electric conductive movable rod 3 is realized, the third support magnetic bottle 11 is electrically connected with the second support magnetic bottle 7 by the third electric connecting rod 10, the electrifying signal receiver 15 receives the electrifying signal from the electrifying signal transmitter 12, the electrifying grounding signal is transmitted to the signal amplifier 13 by the signal transmission rod 14, the condition of the electrifying grounding signal is transmitted to the remote control end by the signal amplifier 13 through the Bluetooth signal transmitting box 29, therefore, real-time monitoring of the single-phase grounded electrifying grounding signal of the power distribution network is realized.
In this embodiment, the second pillar magnet bottle 7 is provided with a movable slot 16 for moving the first power connection link 9. The movable groove 16 for the first power connection connecting rod 9 to move is arranged on the second support magnetic bottle 7, so that the first power connection connecting rod 9 and the second power connection connecting rod 8 can rotate conveniently.
In this embodiment, a guide box 18 for limiting the rotation of the conductive movable rod 3 is provided at one side of the bracket 1. The arrangement of the guide box 18 improves the stability of the rotation of the conductive movable rod 3 by arranging the guide box 18 limiting the rotation of the conductive movable rod 3 at one side of the bracket 1.
In this embodiment, the upper end and the lower end of the guide box 18 are provided with a stop collar 19 for limiting the rotation of the conductive movable rod 3. Through all setting up the stop collar 19 that the restriction leads the rotatory guide movable rod 3 at guide box 18 upper end and lower extreme, the setting of stop collar 19 has further improved the rotatory stability of conductive movable rod 3.
In this embodiment, be equipped with first installation cavity 20 in the guide box 18, be equipped with first mounting panel 25 in the first installation cavity 20, be equipped with second pivot 26 on the first mounting panel 25, second pivot 26 periphery is equipped with guide roller 27, guide roller 27 and the setting of electrically conductive movable rod 3 contact. Through establishing first installation cavity 20 in guide box 18, establish first mounting panel 25 in the first installation cavity 20, establish second pivot 26 on the first mounting panel 25, guide roller 27 is established to second pivot 26 periphery, and guide roller 27 and electrically conductive movable rod 3 contact setting can utilize guide roller 27 to improve the rotatory stability of electrically conductive movable rod 3 so.
In this embodiment, the guide roller 27 is provided with a cushion rubber sleeve 28 on the outer periphery thereof. By providing the cushion rubber sleeve 28 on the outer periphery of the guide roller 27, the arrangement of the cushion rubber sleeve 28 can improve the stability of the rotation of the conductive movable rod 3.
In this embodiment, the bottom is equipped with first piston 21 in first installation cavity 20, one side that first piston 21 is close to first mounting panel 25 is equipped with first piston axle 22, one side that first piston axle 22 is close to first mounting panel 25 is equipped with second piston 24, second piston 24 is fixed on first mounting panel 25, be equipped with first spring 23 between first piston 21 and the second piston 24, first spring 23 cup joints the periphery at first piston axle 22. Through establishing first piston 21 in first installation cavity 20 bottom, first piston shaft 22 and second piston 24, first piston shaft 22 is flexible in first piston 21 and second piston 24, it is scalable at the horizontal direction to have realized guide roller 27, the activity of electrically conductive movable rod 3 has so made things convenient for, in addition, establish first spring 23 between first piston 21 and second piston 24, utilize the elastic restoring force of first spring 23, it is scalable at the horizontal direction to have realized guide roller 27, guide roller 27 is spacing to electrically conductive movable rod 3 has been realized, the rotatory stability of electrically conductive movable rod 3 has been improved, and then the stability of connecting or breaking operation has been improved to the electricity.
In this embodiment, the second pillar magnet bottle 7 is provided with a pair of second mounting plates 33 in the slot 32 and symmetrically arranged with respect to the slot 32, the opposite sides of the second mounting plates 33 are provided with conductive plates 37, and the conductive plates 37 are connected with power connection wires 38. Through making second pillar magnetism bottle 7 in slot 32 and for slot 32 symmetry establish a pair of second mounting panel 33, the relative one side of second mounting panel 33 all establishes electrically conductive board 37, connects on the electrically conductive board 37 and connects electric wire 38, so can conveniently connect the ground connection of electric switch 4.
In this embodiment, a third piston 34 is disposed on a side of the second mounting plate 33 close to the conductive plate 37, a second piston shaft 36 is disposed on a side of the third piston 34 close to the conductive plate 37, and the second piston shaft 36 is fixed to the conductive plate 37. Through establishing third piston 34 in one side that is close to electrically conductive plate 37 at second mounting panel 33, second piston shaft 36 is established in one side that third piston 34 is close to electrically conductive plate 37 to fix second piston shaft 36 on electrically conductive plate 37, so set up, second piston shaft 36 is flexible in the piston, realized that electrically conductive plate 37 can receive when connecing electric switch 4 extrusion, electrically conductive plate 37 can stretch out and draw back in vertical direction, and then improved the flexibility of connecing the electricity connection, make things convenient for the insertion of electrically conductive plate 37.
In this embodiment, a second spring 35 is disposed between the third piston 34 and the conductive plate 37, and the second spring 35 is fitted around the outer periphery of the second piston shaft 36. Through establishing second spring 35 before third piston 34 and conducting plate 37, second spring 35 cup joints the periphery at second piston shaft 36, so sets up, utilizes the elastic flexibility of second spring 35, has realized that conducting plate 37 when receiving the extrusion, and conducting plate 37 utilizes second spring 35 can realize extrudeing switch 4, has improved the stability of ground connection.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A single-phase grounding monitoring system based on a power distribution network is characterized by comprising a support, wherein a mounting seat is arranged at the upper end of the support, a hinged seat is installed on the mounting seat, a first support magnetic bottle rotating along the hinged seat is arranged on the hinged seat, a second support magnetic bottle is further arranged on the hinged seat, a first power connection connecting rod and a second power connection connecting rod are connected between the first support magnetic bottle and the second support magnetic bottle, a first rotating shaft is connected between the first power connection connecting rod and the second power connection connecting rod, a third support magnetic bottle is arranged on the mounting seat, a third power connection connecting rod is connected between the second support magnetic bottle and the third support magnetic bottle, a power-on signal transmitter is arranged on the third support magnetic bottle, a signal amplifier is arranged at the upper end of the mounting seat, a Bluetooth signal transmitting box is arranged on one side of the signal amplifier, a signal transmission rod is arranged at the upper end of the Bluetooth signal transmitting box, the improved transformer substation is characterized in that an electrifying signal receiver corresponding to the electrifying signal transmitter is arranged at the upper end of the signal transmission rod, an earthing box is arranged on one side of the support, a driving mechanism is arranged at the upper end of the earthing box, an electrically conductive movable rod is arranged at the upper end of the driving mechanism, an electric switch is arranged at one end, away from the driving mechanism, of the electrically conductive movable rod, and an inserting slot for inserting the electric switch is formed in the second support magnetic bottle.
2. The power distribution network-based single-phase grounding monitoring system as claimed in claim 1, wherein a movable slot for moving the first power connection link is formed in the second pillar magnetic bottle.
3. The single-phase grounding monitoring system based on the power distribution network as claimed in claim 1, wherein a guide box for limiting the rotation of the conductive movable rod is arranged on one side of the bracket.
4. The power distribution network-based single-phase grounding monitoring system as claimed in claim 3, wherein the upper end and the lower end of the guide box are provided with a limiting sleeve for limiting the rotation of the conductive movable rod.
5. The power distribution network-based single-phase grounding monitoring system as claimed in claim 3, wherein a first mounting cavity is formed in the guide box, a first mounting plate is arranged in the first mounting cavity, a second rotating shaft is arranged on the first mounting plate, a guide roller is arranged on the periphery of the second rotating shaft, and the guide roller is in contact with the conductive movable rod.
6. The single-phase grounding monitoring system based on the power distribution network as claimed in claim 5, wherein the guide rollers are provided with a buffer rubber sleeve at the periphery.
7. The power distribution network-based single-phase grounding monitoring system as claimed in claim 5, wherein a first piston is disposed at a bottom portion in the first mounting cavity, a first piston shaft is disposed at a side of the first piston close to the first mounting plate, a second piston is disposed at a side of the first piston shaft close to the first mounting plate, the second piston is fixed on the first mounting plate, and a first spring is disposed between the first piston and the second piston and sleeved on an outer periphery of the first piston shaft.
8. The power distribution network-based single-phase grounding monitoring system as claimed in claim 1, wherein the second pillar magnetic bottle is provided with a pair of second mounting plates symmetrically arranged in and relative to the slot, and the opposite sides of the second mounting plates are provided with conductive plates, and the conductive plates are connected with power connection wires.
9. The single-phase grounding monitoring system based on the power distribution network as claimed in claim 8, wherein a third piston is disposed on a side of the second mounting plate close to the conductive plate, and a second piston shaft is disposed on a side of the third piston close to the conductive plate and fixed to the conductive plate.
10. The distribution network-based single-phase grounding monitoring system as claimed in claim 9, wherein a second spring is disposed between the third piston and the conductive plate, and the second spring is sleeved on an outer circumference of a second piston shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010885000.XA CN111999675B (en) | 2020-08-28 | 2020-08-28 | Single-phase grounding monitoring system based on power distribution network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010885000.XA CN111999675B (en) | 2020-08-28 | 2020-08-28 | Single-phase grounding monitoring system based on power distribution network |
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| Publication Number | Publication Date |
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| CN111999675A true CN111999675A (en) | 2020-11-27 |
| CN111999675B CN111999675B (en) | 2023-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010885000.XA Active CN111999675B (en) | 2020-08-28 | 2020-08-28 | Single-phase grounding monitoring system based on power distribution network |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2735526Y (en) * | 2004-08-19 | 2005-10-19 | 王若柏 | Outdoor high-voltage isolating switch |
| US20080012720A1 (en) * | 2006-07-07 | 2008-01-17 | Rostron Joseph R | Current monitoring device for high voltage electric power lines |
| US20170044895A1 (en) * | 2014-05-14 | 2017-02-16 | Evolution Engineering Inc. | Apparatuses and methods for evaluating systems used in electromagnetic telemetry transmissions |
| CN106655040A (en) * | 2017-02-21 | 2017-05-10 | 国网山东省电力公司邹城市供电公司 | High voltage transmission cable bracket system |
| CN209149559U (en) * | 2018-10-23 | 2019-07-23 | 中国铁路总公司 | A kind of wireless communication high iron catenary arrester on-line monitoring system |
| CN110308685A (en) * | 2019-07-05 | 2019-10-08 | 国家电网有限公司 | A kind of electric power overhaul working site monitoring equipment |
-
2020
- 2020-08-28 CN CN202010885000.XA patent/CN111999675B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2735526Y (en) * | 2004-08-19 | 2005-10-19 | 王若柏 | Outdoor high-voltage isolating switch |
| US20080012720A1 (en) * | 2006-07-07 | 2008-01-17 | Rostron Joseph R | Current monitoring device for high voltage electric power lines |
| US20170044895A1 (en) * | 2014-05-14 | 2017-02-16 | Evolution Engineering Inc. | Apparatuses and methods for evaluating systems used in electromagnetic telemetry transmissions |
| CN106655040A (en) * | 2017-02-21 | 2017-05-10 | 国网山东省电力公司邹城市供电公司 | High voltage transmission cable bracket system |
| CN209149559U (en) * | 2018-10-23 | 2019-07-23 | 中国铁路总公司 | A kind of wireless communication high iron catenary arrester on-line monitoring system |
| CN110308685A (en) * | 2019-07-05 | 2019-10-08 | 国家电网有限公司 | A kind of electric power overhaul working site monitoring equipment |
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| Publication number | Publication date |
|---|---|
| CN111999675B (en) | 2023-03-21 |
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