CN208849098U - A kind of electric power security protection facility intelligent positioner - Google Patents

A kind of electric power security protection facility intelligent positioner Download PDF

Info

Publication number
CN208849098U
CN208849098U CN201821710487.2U CN201821710487U CN208849098U CN 208849098 U CN208849098 U CN 208849098U CN 201821710487 U CN201821710487 U CN 201821710487U CN 208849098 U CN208849098 U CN 208849098U
Authority
CN
China
Prior art keywords
pressure sensor
conducting wire
plate
grounding
pressing plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201821710487.2U
Other languages
Chinese (zh)
Inventor
刘炳言
韩宝益
宋海涛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Shandong Electric Power Co Qixia Power Supply Co
Original Assignee
State Grid Shandong Electric Power Co Qixia Power Supply Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Grid Shandong Electric Power Co Qixia Power Supply Co filed Critical State Grid Shandong Electric Power Co Qixia Power Supply Co
Priority to CN201821710487.2U priority Critical patent/CN208849098U/en
Application granted granted Critical
Publication of CN208849098U publication Critical patent/CN208849098U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

The utility model relates to a kind of electric power security protection facility intelligent positioners, belong to electric power security protection facility real-time control apparatus technical field of structures.Including earthing or grounding means ontology and intelligent controller, intelligent controller communicates with monitor supervision platform, mobile phone, and wherein earthing or grounding means ontology includes with lower component: insulating bar;Conducting wire articulated device;Grounding device, grounding device are connected with conducting wire articulated device by copper wire, and the ground connection pressing plate for clamping ground body is screwed on grounding device;Conducting wire pressing plate, conducting wire pressing plate are installed on the top of insulated operating rod;First pressure sensor, the 4th pressure sensor, first pressure sensor is installed on conducting wire pressing plate, the 4th pressure sensor is installed on ground connection pressing plate;Intelligent controller passes through the first signal wire and first pressure sensor communication connection, passes through second signal line and the 4th pressure sensor communication connection.The utility model can monitor the hanging position situation of earthing or grounding means ontology in real time, and can monitor whether good etc. the states of mounting.

Description

A kind of electric power security protection facility intelligent positioner
Technical field
The utility model relates to a kind of electric power security protection facility intelligent positioners, belong to electric power security protection real-time control apparatus knot Structure technical field.
Background technique
In electric system maintenance, the security protections equipment such as ground line, grounding switch is the person that must be used and equipment The protective wire of safety.In the work of electric system interruption maintenance, in order to guarantee service personnel's personal safety and equipment operational safety, stop The high-tension line and switch of close supply side after electricity must mount ground line, prevent unexpected power transmission or induced electricity to the person and set Standby injury.However in interruption maintenance work, since the carelessness of staff or the monitoring for the responsible person that works are not in place often Appearance forgets that suspension, misplaced route, mounting are insecure, and situations such as recalling or recalling ground line in advance is forgotten after work, is given Staff, which is detached from safeguard protection power transmission occurs at any time, in line maintenance worker and equipment causes electric shock accidents.These situations are in electricity It happens occasionally in Force system and electric system is badly in need of and must be solved the problems, such as.
Summary of the invention
Utility model aims to solve the shortcomings of the prior art, provide a kind of can monitor in real time and connect The hanging position situation of ground device noumenon, and can monitor mounting whether firm electric power security protection facility intelligent positioner.
A kind of electric power security protection facility intelligent positioner is characterized in that and connects including earthing or grounding means ontology and being installed on Intelligent controller 5 in ground device noumenon, intelligent controller 5 communicate with monitor supervision platform 14, mobile phone 15, wherein earthing or grounding means sheet Body includes with lower component:
Three insulating bars 1;
Three conducting wire articulated devices 2, the conducting wire articulated device 2 are rotationally connected with the top of the insulating bar 1;
One grounding device 17, the grounding device 17 are connected by copper wire 8 with conducting wire articulated device 2, are screwed on grounding device 17 There is the ground connection pressing plate 9 for clamping ground body;
Three conducting wire pressing plates 3, the conducting wire pressing plate 3 are installed on the top of insulated operating rod 1 and are located at conducting wire articulated device 2 Interior, conducting wire pressing plate 3 can be gone up and down with the rotation of insulating bar 1, to match clamping conducting wire with conducting wire articulated device 2;
First pressure sensor 4, second pressure sensor 20, third pressure sensor 21, the 4th pressure sensor 10, institute First pressure sensor 4, second pressure sensor 20, third pressure sensor 21 is stated to be connected in series and be respectively arranged in three conducting wires On pressing plate 3, the 4th pressure sensor 10 is installed on ground connection pressing plate 9;
The intelligent controller 5 passes through the first signal wire 6 and concatenated first pressure sensor 4, second pressure sensor 20,21 communication connection of third pressure sensor, pass through 10 communication connection of second signal line 7 and the 4th pressure sensor.
Preferably, the intelligent controller 5 includes micro-control unit 19, power module 11, for receiving first pressure biography The receiving module 12 of 10 data of sensor 4 and the 4th pressure sensor, for sending data to monitor supervision platform 14 and mobile phone 15 Sending module 16, the GPRS wireless locating module 13 for display position information;
Preferably, the conducting wire articulated device 2 includes upper plate 2-1, lower plate 2-2, and conducting wire pressing plate 3 and insulating bar 1 are one Body structure and position are set between upper plate 2-1, lower plate 2-2, upper plate 2-1, lower plate 2-2 side be connected as by connecting plate 2-3 Integrally, the internal thread hole for passing through insulating bar 1 is offered on lower plate 2-2, the top outer wall of insulating bar 1 is equipped with External screw thread;
Preferably, the grounding device 17 includes top plate 17-1, bottom plate 17-2, and ground connection pressing plate 9 is set to top plate 17-1, bottom plate Between 17-2, top plate 17-1, bottom plate 17-2 side be connected as one by side plate 17-3, be grounded on pressing plate 9 and be equipped with and have The trepanning for passing through spinner handle 17-4 is offered on externally threaded spinner handle 17-4, bottom plate 17-2;
Preferably, the upper plate 2-1, top plate 17-1 lower surface offer for fixing conducting wire or grounding device three Angular groove 18.
A kind of localization method of electric power security protection facility intelligent positioner, be characterized in that the following steps are included:
1, the switch of intelligent controller 5 is opened when staff takes earthing or grounding means away out of toolroom, at this point, the group is grounded Device just appears on the real-time map of monitor supervision platform 14 and mobile phone 15, and can be clearly seen that the movement rail of earthing or grounding means Mark;
2, earthing or grounding means is taken at suspension, first grounding device 17 is connected with grounding body, then by three conducting wire articulated devices 2 It is mounted on A, B, C three-phase conducting wire, it is ensured that contact is good, and the quick and complete feeding grounding body of high current energy for guaranteeing that moment is sent is led Enter the earth;
3, earthing or grounding means is with circle and in circle one state of inside-paint on the real-time map of monitor supervision platform 14 or mobile phone 15 Border common ground symbol shown, earthing or grounding means is grounded symbol before suspension as red, if three conducting wire articulated devices 2 and A, B, After the contact of C three-phase conducting wire is good, and grounding device 17 and grounding body correctly mount, ground connection symbol just will become green, at this time can To notify work responsible person, earthing or grounding means, which is hung up properly, to start to work, if three conducting wire articulated devices 2 have poor contact at one, Vertical bar in ground connection symbol will redden color, and site operation personnel needs to reexamine hanging point, if 17 poor contact of grounding device, connects The whippletree of ground symbol will redden, and need to check and furbuckles, ground connection symbol entirety greening can work;
Preferably, the monitor supervision platform 14, mobile phone 15 real-time map in preset every power circuit and electric pole Location information, when intelligent controller 5 is close to line pole, which presets route name and bar number will be on real-time map It shows and, can be clearly seen whether this bar number is the bar number that hang earthing or grounding means, if monitoring personnel discovery mistake Work responsible person can be notified to correct immediately;
Preferably, when presetting that earthing or grounding means is hung before going into operation in each service work in the monitor supervision platform 14 and mobile phone 15 Between and work at the end of earthing or grounding means Withdrawal times timed reminding warning message, if hand over ticket time-out, earthing or grounding means is also It does not withdraw, monitoring module judges that earthing or grounding means in inspecting state and former hanging position, will also send a warning message, every group of ground connection Device is designed with unique address code and number, so as to clearly differentiate multiple earthing or grounding means, in this way can simultaneously Monitoring Company Multiple earthing or grounding means used in multinomial task in the same day all service works.
The utility model can produce following good effect compared with the prior art:
1, the real-time monitoring platform and cell phone application being capable of real-time display power connection equipment position, use state and route levers It is number whether correct, generation do not hang, accidentally hangs, it is incorrect to hang, do not hung, removed by work ticket time requirement when, be equipped with automatic Alarm, can acquire and can send a warning message in real time in monitor supervision platform, avoid because of safety accident caused by connecing;
2, work responsible person, regulation center, peace matter portion and production leader can grasp live earthing or grounding means in real time and use feelings Condition timely and effectively carries out safety supervision and operates against regulations, prevents accident.
3, for electric system prevent because the safety protection facilities such as ground line, grounding switch, security protection facility faulty operation and The person caused by incorrect use and equipment safety accident reduce directly or indirectly economic loss for country.
Detailed description of the invention
A kind of Fig. 1: structural schematic diagram of electric power security protection facility intelligent positioner of the utility model;
Fig. 2: the structural schematic diagram of intelligent controller;
Fig. 3: first pressure sensor, second pressure sensor, third pressure sensor, the 4th pressure sensor signal The connection schematic diagram of line and intelligent controller.
In figure: 1, insulating bar;2, conducting wire articulated device;2-1, upper plate;2-2, lower plate;2-3, connecting plate;3, conducting wire pressure Plate;4, first pressure sensor;5, intelligent controller;6, the first signal wire;7, second signal line;8, copper wire;9, earth contact pressure Plate;10, the 4th pressure sensor;11, power module;12, receiving module;13, GPRS wireless locating module;14, monitoring is flat Platform;15, mobile phone;16, sending module;17, grounding device;17-1, top plate;17-2, bottom plate;17-3, side plate;17-4, spinner handle;18, Groove;19, micro-control unit;20, second pressure sensor;21, third pressure sensor.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.
Embodiment 1
The electric power security protection facility intelligent positioner of the present embodiment, with reference to attached drawing 1-3, including earthing or grounding means ontology and installation In the intelligent controller 5 on earthing or grounding means ontology, intelligent controller 5 communicates with monitor supervision platform 14, mobile phone 15, wherein ground connection dress Setting ontology includes with lower component:
Three insulating bars 1;
Three conducting wire articulated devices 2, the conducting wire articulated device 2 are rotationally connected with the top of the insulating bar 1;
One grounding device 17, the grounding device 17 are connected by copper wire 8 with conducting wire articulated device 2, are screwed on grounding device 17 There is the ground connection pressing plate 9 for clamping ground body;
Three conducting wire pressing plates 3, the conducting wire pressing plate 3 are installed on the top of insulated operating rod 1 and are located at conducting wire articulated device 2 Interior, conducting wire pressing plate 3 can be gone up and down with the rotation of insulating bar 1, to match clamping conducting wire with conducting wire articulated device 2;
First pressure sensor 4, second pressure sensor 20, third pressure sensor 21, the 4th pressure sensor 10, institute First pressure sensor 4, second pressure sensor 20, third pressure sensor 21 is stated to be connected in series and be respectively arranged in three conducting wires On pressing plate 3, the 4th pressure sensor 10 is installed on ground connection pressing plate 9;
Intelligent controller 5 passes through the first signal wire 6 and concatenated first pressure sensor 4, second pressure sensor 20, the Three pressure sensors, 21 communication connection passes through 10 communication connection of second signal line 7 and the 4th pressure sensor.
Wherein, intelligent controller 5 include micro-control unit 19, power module 11, for receive first pressure sensor 4 and The receiving module 12 of 4th pressure sensor, 10 data, the transmission mould for sending data to monitor supervision platform 14 and mobile phone 15 Block 16, the GPRS wireless locating module 13 for display position information;
Conducting wire articulated device 2 includes upper plate 2-1, lower plate 2-2, and conducting wire pressing plate 3 and insulating bar 1 are structure as a whole and position Between upper plate 2-1, lower plate 2-2, upper plate 2-1, lower plate 2-2 side be connected as one by connecting plate 2-3, lower plate 2-2 On offer internal thread hole for passing through insulating bar 1, the top outer wall of insulating bar 1 is equipped with external screw thread;Ground connection Device 17 includes top plate 17-1, bottom plate 17-2, and ground connection pressing plate 9 is set between top plate 17-1, bottom plate 17-2, top plate 17-1, bottom plate 17- 2 side is connected as one by side plate 17-3, is grounded on pressing plate 9 and is equipped with externally threaded spinner handle 17-4, bottom plate 17-2 On offer for pass through spinner handle 17-4 trepanning;
In order to be firmly fixed conducting wire or grounding body, upper plate 2-1, top plate 17-1 lower surface offer for solid Determine the triangular groove 18 of conducting wire or grounding device.
Internet of Things smart circuit is used inside intelligent controller 5, is positioned equipped with GPRS wireless locating module 13, power supply Module 11 is powered using rechargeable lithium battary group, and stand-by time is long, powered stable, entire 5 waterproof of intelligent controller, shockproof. Detect whether securely well guarantee conductive effect with the contact of conducting wire by first pressure sensor 4.It is passed by the 4th pressure The detection of sensor 10 and grounding body whether be connected point contact good, it is ensured that prominent incoming current moment by winning feeding in succession greatly, Guarantee service personnel and equipment safety.
Embodiment 2
The localization method of the electric power security protection facility intelligent positioner of the present embodiment, comprising the following steps:
1, the switch of intelligent controller 5 is opened when staff takes earthing or grounding means away out of toolroom, at this point, the group is grounded Device just appears on the real-time map of monitor supervision platform 14 and mobile phone 15, and can be clearly seen that the movement rail of earthing or grounding means Mark;
2, earthing or grounding means is taken at suspension, first grounding device 17 is connected with grounding body, then by three conducting wire articulated devices 2 It is mounted on A, B, C three-phase conducting wire, it is ensured that contact is good, and the quick and complete feeding grounding body of high current energy for guaranteeing that moment is sent is led Enter the earth;
3, earthing or grounding means is with circle and in circle one state of inside-paint on the real-time map of monitor supervision platform 14 or mobile phone 15 Border common ground symbol shown, earthing or grounding means is grounded symbol before suspension as red, if three conducting wire articulated devices 2 and A, B, After the contact of C three-phase conducting wire is good, and grounding device 17 and grounding body correctly mount, ground connection symbol just will become green, at this time can With the responsible person that reports, earthing or grounding means, which is hung up properly, to start to work, if three conducting wire articulated devices 2 have poor contact at one, Vertical bar in ground connection symbol will redden color, and site operation personnel needs to reexamine hanging point, if 17 poor contact of grounding device, connects The whippletree of ground symbol will redden, and need to check and furbuckles, ground connection symbol entirety greening can work;
Monitor supervision platform 14, mobile phone 15 real-time map in preset the location information of every power circuit and electric pole, When intelligent controller 5 is close to line pole, which presets route name and bar number and will show and on real-time map, energy It is clearly seen whether this bar number is the bar number that hang earthing or grounding means, if monitoring personnel discovery mistake can notify immediately Work responsible person corrects;
Earthing or grounding means suspension time and work knot before going into operation in each service work are preset in monitor supervision platform 14 and mobile phone 15 The timed reminding warning message of earthing or grounding means Withdrawal times when beam, if handing over ticket time-out, earthing or grounding means is not withdrawn also, monitoring Module judges that earthing or grounding means in inspecting state and former hanging position, will also send a warning message, every group of earthing or grounding means is designed with Unique address code and number in this way can Monitoring Company's same day all inspections simultaneously so as to clearly differentiate multiple earthing or grounding means Repair multiple earthing or grounding means used in multinomial task in work.
Electric power security protection facility intelligent positioner is using GPRS wireless location system, by satellite accurately to every group of maintenance Work the ground line that uses or earthing or grounding means status, and with technology of Internet of things the every of ground line currently in use or earthing or grounding means The secured state of a hitch point and grounding point is sent to safety supervision portion, regulation center, production leader solely by Internet of Things intelligent object Vertical real-time locating and monitoring platform, while work ticket signed by, work responsible person, maintenance portion are sent in a manner of cell phone application On door responsible person, safety supervision portion and company leader's mobile phone.
The utility model energy real-time monitoring platform and cell phone application can real-time display power connection equipment position, use state with And whether route lever number correct, generation do not hang, accidentally hangs, it is incorrect to hang, do not hung, removed by work ticket time requirement when, It is reminded equipped with auto-alarming, can acquire and can send a warning message in real time in monitor supervision platform, avoid because of safety accident, work caused by connecing Live earthing or grounding means service condition can be grasped in real time by making responsible person, regulation center, peace matter portion and production leader, timely and effectively Safety supervision and job guide are carried out, is prevented for electric system because of safety protection facilities such as ground line, grounding switch, security protection facilities Faulty operation and incorrect use caused by the person and equipment safety accident, reduce directly or indirectly economic loss for country.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims (5)

1. a kind of electric power security protection facility intelligent positioner, it is characterised in that including earthing or grounding means ontology and be installed on earthing or grounding means Intelligent controller (5) on ontology, intelligent controller (5) communicate with monitor supervision platform (14), mobile phone (15), wherein earthing or grounding means Ontology includes with lower component:
Three insulating bars (1);
Three conducting wire articulated devices (2), the conducting wire articulated device (2) are rotationally connected with the top of the insulating bar (1);
One grounding device (17), the grounding device (17) are connected with conducting wire articulated device (2) by copper wire (8), grounding device (17) On be screwed with ground connection pressing plate (9) for clamping ground body;
Three conducting wire pressing plates (3), the conducting wire pressing plate (3) are installed on the top of insulated operating rod 1 and are located at conducting wire articulated device (2) Interior, conducting wire pressing plate (3) can be gone up and down with the rotation of insulating bar (1), be led to match clamping with conducting wire articulated device (2) Line;
First pressure sensor (4), second pressure sensor (20), third pressure sensor (21), the 4th pressure sensor (10), the first pressure sensor (4), second pressure sensor (20), third pressure sensor (21) are connected in series and distinguish It is installed on three conducting wire pressing plates (3), the 4th pressure sensor (10) is installed on ground connection pressing plate (9);
The intelligent controller (5) is sensed by the first signal wire (6) and concatenated first pressure sensor (4), second pressure Device (20), third pressure sensor (21) communication connection are connected by second signal line (7) and the communication of the 4th pressure sensor (10) It connects.
2. a kind of electric power security protection facility intelligent positioner described in accordance with the claim 1, it is characterised in that the intelligent control Device (5) includes micro-control unit (19), power module (11), for receiving first pressure sensor (4), second pressure sensor (20), third pressure sensor (21) and the receiving module (12) of the 4th pressure sensor (10) data, for data to be sent To the sending module (16) of monitor supervision platform (14) and mobile phone (15), for the GPRS wireless locating module of display position information (13).
3. a kind of electric power security protection facility intelligent positioner described in accordance with the claim 1, it is characterised in that the conducting wire mounting Device (2) includes upper plate (2-1), lower plate (2-2), and conducting wire pressing plate (3) is structure as a whole with insulating bar (1) and position is set on upper Between plate (2-1), lower plate (2-2), upper plate (2-1), lower plate (2-2) side be connected as one by connecting plate (2-3), lower plate It is offered on (2-2) for the internal thread hole across insulating bar (1), the top outer wall of insulating bar (1) is equipped with outer Screw thread.
4. a kind of electric power security protection facility intelligent positioner described in accordance with the claim 3, it is characterised in that the grounding device It (17) include top plate (17-1), bottom plate (17-2), ground connection pressing plate (9) is set between top plate (17-1), bottom plate (17-2), top plate The side of (17-1), bottom plate (17-2) is connected as one by side plate (17-3), is equipped on ground connection pressing plate (9) with external screw thread Spinner handle (17-4), offer for the trepanning across spinner handle (17-4) on bottom plate (17-2).
5. a kind of electric power security protection facility intelligent positioner according to claim 4, it is characterised in that the upper plate (2- 1), the lower surface of top plate (17-1) offers the triangular groove (18) for fixing conducting wire or grounding device.
CN201821710487.2U 2018-10-22 2018-10-22 A kind of electric power security protection facility intelligent positioner Active CN208849098U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821710487.2U CN208849098U (en) 2018-10-22 2018-10-22 A kind of electric power security protection facility intelligent positioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821710487.2U CN208849098U (en) 2018-10-22 2018-10-22 A kind of electric power security protection facility intelligent positioner

Publications (1)

Publication Number Publication Date
CN208849098U true CN208849098U (en) 2019-05-10

Family

ID=66376323

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201821710487.2U Active CN208849098U (en) 2018-10-22 2018-10-22 A kind of electric power security protection facility intelligent positioner

Country Status (1)

Country Link
CN (1) CN208849098U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109361084A (en) * 2018-10-22 2019-02-19 国网山东省电力公司栖霞市供电公司 A kind of electric power security protection facility intelligent positioner and its localization method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109361084A (en) * 2018-10-22 2019-02-19 国网山东省电力公司栖霞市供电公司 A kind of electric power security protection facility intelligent positioner and its localization method

Similar Documents

Publication Publication Date Title
CN109361084A (en) A kind of electric power security protection facility intelligent positioner and its localization method
CN202975125U (en) Auxiliary electricity testing device for grounding
CN101738565B (en) Adaptive fault indicator
CN207440205U (en) SPD intelligent monitor systems
CN203774866U (en) Intelligent ground wire apparatus and ground wire operation safety monitoring and error-preventing system
CN102116823A (en) System for automatically judging and positioning faults of automatic blocking and continuous railway power lines in railway distribution network
CN107069965B (en) Step voltage leakage alarm device for power distribution network and power distribution network leakage monitoring system in power supply district
CN101651293A (en) Real-time monitoring and management system of digital grounding wire
CN105242626A (en) Line safety intelligent auxiliary monitoring system
CN208849098U (en) A kind of electric power security protection facility intelligent positioner
CN202929155U (en) Overhead line real-time detection system based on wireless sensor network
CN108199477B (en) Remote intelligent monitoring method and equipment for faults of AC/DC system of transformer substation
CN110381651A (en) A kind of light of stage Monitoring and management system
CN202025060U (en) Automatic fault determining and positioning system of railway distribution network automatic blocking and continuous transmission lines
CN206096344U (en) Overhead line fault locator
CN104483589A (en) Detecting device and method for four-tongue grounding wire
CN103941145B (en) A kind of transformer station temporarily line on-line monitoring system
CN208753985U (en) Intelligent lightning protection device and the lightning protection box for protecting three-phase circuit
CN205091588U (en) Supplementary monitoring system of circuit safety intelligence
CN208443959U (en) Intelligent network distribution grounding wire device and intelligent network distribution ground connection measuring system
CN203326525U (en) Novel high voltage line bumper
CN203733968U (en) Special safety clamp for 10kV high-voltage grounding wire
CN102508101A (en) Power cable operation fault monitoring terminal and system for detecting short circuit
CN207181580U (en) Broken neutral line indicator
CN205302333U (en) Transformer substation articulates ground wire detecting system

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant