CN201667491U - Ground wire monitoring device used in transformer station - Google Patents
Ground wire monitoring device used in transformer station Download PDFInfo
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- CN201667491U CN201667491U CN2010201574477U CN201020157447U CN201667491U CN 201667491 U CN201667491 U CN 201667491U CN 2010201574477 U CN2010201574477 U CN 2010201574477U CN 201020157447 U CN201020157447 U CN 201020157447U CN 201667491 U CN201667491 U CN 201667491U
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Abstract
A ground wire monitoring device used in a transformer station comprises a ground wire cabinet having a plurality of independent drawers and is characterized in that inside the drawers are provided laminates with resilient members arranged thereunder, a sensor which is used to sense the deformation of the resilient members and send switch signals is provided under each drawer laminate, a collecting device in the ground wire cabinet is electrically connected to the sensors, and used for acquiring and storing switch signals sent out by each sensor, a concentrator is electrically connected with the collecting devices and is used for information transmission with the collecting devices, a display is electrically connected with the concentrator and is used for information transmission with the concentrator, and a server provided with database and background management software is connected to power system LAN and the concentrator through a network. Compared with the prior art, the utility model is advantageous in that the device is simple in structure and low in cost which promise a wide market promotion prospect, and can realize management informatization and improve production efficiency in a safe environment, thereby preventing closing with a load.
Description
Technical field
The utility model relates to a kind of management system of transformer substation grounding wire, particularly a kind of management devices that is used for real-time monitoring grounding wire user mode.
Background technology
In the electric industry production work, earth connection is to guarantee that the staff exempts from the most direct safeguard measure of injury of getting an electric shock.The operation of mounting or dismounting earth connection is dangerous bigger operation in the electric operation, it is charged in the electric power system that to articulate the accident that ground connection line or belt earth connection send electricity be the main root that causes human casualty accident and artificial equipment breakdown, therefore, the correctness of guaranteeing to install and remove earth connection is an important process of electric substation's safe and reliable operation.
Usually, electric power system has clearly regulation in " safety ": every winding ground wire all should be numbered, and leaves the fixed location in, and deposit position also should be numbered, use by numbering when handling work ticket and using operation order, necessary assurance earth connection number is consistent with the deposit position number.Electric substation generally adopts collection control (operation) the station administration pattern of centralized management at present; electric substation carries out unattended; concentrator station is because administration electric substation is more; operational ton is bigger; the earth connection of operations staff in regular meeting's carelessness is used; because the operation of earth connection belongs to provisional more; some electric substations think little of the management of earth connection; earth connection is neither numbered (or lack of standardization); also unfixed point is deposited, if earth connection at will takes in use, with after do not check inspection yet; just be easy to cause the omission fault, thereby cause the serious accident that Lou disconnects ground wire and send electricity with earth connection.
In the prior art, if any application number is that the Chinese invention patent of 200910065808.7 " real-time monitoring and management system of digital grounding wire " discloses a kind of real-time monitoring and management system of digital grounding wire, comprises earth electrode wire clamp, digital ground wire stake, ground wire cabinet, wireless communication controller, wireless communication base station, terminal, database and management software thereof.Wherein, digital ground wire stake is provided with earth electrode wire clamp installing hole, passive RFID tags, magnetic material; The earth electrode wire clamp is provided with the wireless communication controller of built-in RFID tag readable degree device, and outer setting has screw mandrel, and screw mandrel closely is connected with the ground wire installing hole of digital ground wire stake.This patent is by the digitlization of transformer substation grounding wire information, realization is to the auto-real-time monitoring management of transformer substation grounding wire, but, what the management system of above-mentioned patent adopted is the input of wireless communication mode, need in every lattice of ground wire cabinet, passive RFID tags be set, also to be equipped with and have the wireless communication controller that passive RFID indicates recognizer, set up a series of corollary equipments such as reflector, reader, encoder and antenna that such cover radio frequency communication system need relate to less radio-frequency, the cost height that makes scrap build and configuration; And, because country rations the power supply frequently for nothing and transmitting power all has special regulation, every kind of frequency all has different application, and this makes the operating frequency of less radio-frequency to select in the scope of being fixed on, be subjected to the restriction of environment and technical parameter bigger, also be not easy to safeguard.
Therefore, in view of the foregoing, also need existing transformer substation grounding wire digital management system is made further improvement, make it can adapt in the engineering construction requirement better each characteristic such as cost, accuracy and plant maintenance be simple.
The utility model content
Technical problem to be solved in the utility model be provide at above-mentioned prior art present situation that a kind of deployment cost is low, adaptability is strong and the transformer substation grounding wire monitoring device of the information system management of the ground wire that can achieve a butt joint better.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: this transformer substation grounding wire monitoring device, include the earth connection cabinet that is arranged on transformer station, this earth connection cabinet has a plurality of separate and be built-in with the drawer of earth connection, it is characterized in that: be provided with the up and down laminate of energy in the described drawer, the below of this laminate is provided with elastic component, and this elastic component makes described laminate have the trend of upwards lifting all the time; Wherein, described transformer substation grounding wire monitoring device also includes:
Transducer is arranged on the laminate below of each described drawer, and this transducer can be responded to the deformation quantity of described elastic component and send switching signal under the state that the deformation quantity of this elastic component changes;
Collector is arranged in the described earth connection cabinet, and described collector is connected with described sensor electrical, and this collector collection is also stored the described switching signal that each described transducer sends;
Manifold is electrically connected and realizes with described collector and the message transmission of this collector;
Display screen is electrically connected and realizes and the message transmission of this manifold that this display screen is used to show the current user mode of corresponding earth connection in the described earth connection cabinet with described manifold; And
Server is equipped with database and background manage software, is used to realize record, statistics and management to described earth connection user mode, and this server is connected with described manifold network by the electric power local area network (LAN).
For can fast monitored in the drawer user mode of earth connection change, and do not take the parking space of earth connection, as preferably, can realize by following structure: described elastic component is a spring, described drawer is respectively arranged with a described spring at base plate four jiaos, described laminate is arranged on the top of described drawer-bottom board, and, one end of each described spring links to each other with described base plate, the other end of this spring links to each other with the laminate of described drawer bottom, described transducer is fixedly installed on the base plate of described drawer, the top of this transducer has a control switch, under the state that offsets at the laminate and the described transducer top of described drawer, and described control switch closure, laminate at described drawer breaks away under the state at described transducer top, and described control switch disconnects.
In order to guarantee that earth connection is after taking out and putting back to, drawer can push in the earth connection cabinet and set back, as further preferred, also be provided with a touch switch that is used to monitor this drawer open and-shut mode on the described drawer, described touch switch is fixed on the back of described drawer back side panel, under the state that described drawer pushes fully, the backboard of described touch switch and described wiring cabinet offsets, this touch switch closure, under the state that described drawer is pulled out, described touch switch breaks away from the backboard of described wiring cabinet, and this touch switch disconnects.
In order to simplify the construction cost of monitoring device, can connect by common power line between collector and the manifold, need not to lay in addition netting twine, and, realize message transmission by power carrier between described collector and the described manifold.
As preferably, also can link to each other between described manifold and the described display screen by common power line, saved the trouble and the expense of other laying netting twine, and, realize message transmission by power carrier between described manifold and the described display screen.
Described electric power local area network (LAN) can be the variety of network types of prior art in using, simply, with based on the Ethernet of ICP/IP protocol as preferably.
Compared with prior art, advantage of the present utility model is: the application need not existing transformer substation grounding wire management system is just reconstructed on a large scale and can directly be used, and the adaptability of whole monitoring device is strong, and is applied widely; Bottom at existing each drawer of earth connection cabinet is provided with transducer, because after putting into earth connection in the drawer and taking out earth connection, load-bearing on the drawer laminate varies in size, the elastic deformation amount of the elastic component that transducer basis and laminate offset promptly can monitor the operating position of earth connection, complete equipment is simple in structure, cost is low, and promotional value is higher; In addition, earth connection management scene and electric power local area network (LAN) connect, make grounding wire monitoring device can really realize information system management, improve safety production efficiency, avoid just operating and the phenomenon that disconnects ground wire occurring leaking with operating personnel's memory, ensured safety in production, stopped to send the generation of electrification effectively with the earth connection combined floodgate.
Description of drawings
Fig. 1 is the system topological figure of the utility model embodiment.
Fig. 2 is the system block diagram of the utility model embodiment.
Fig. 3 is the earth connection cabinet schematic diagram of the utility model embodiment.
Fig. 4 is the drawer structure schematic diagram of the utility model embodiment.
Fig. 5 is the end view of drawer structure shown in Figure 4.
Fig. 6 is the interface connection diagram of earth connection cabinet and the collector of the utility model embodiment.
Fig. 7 is the system flow chart of the utility model embodiment.
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
As Fig. 1～shown in Figure 6, be a preferred embodiment of the present utility model, this grounding wire monitoring device includes earth connection cabinet 1, transducer 2, collector 3, manifold 4, display screen 5 and server 6;
Wherein, earth connection cabinet 1 is arranged on transformer station, earth connection cabinet 1 integral body of present embodiment is divided into two-layer, the upper strata with dividing plate as medium, can deposit other things, lower floor is eight can independently draw back the drawer 11 that the ground wire of being convenient to achieve a butt joint is managed respectively respectively, connect by guide rail 112 between drawer 11 and the earth connection cabinet 1, can deposit the earth connection of 10kV specification in each drawer 11, the panel of earth connection cabinet 1 each drawer 11 is provided with illuminated facia 12, also is provided with node side daughter board and DB9 (pass) interface on the earth connection cabinet 1, is used for the switching of earth connection cabinet 1 interior eight transducer 2 node signals, and the back of earth connection cabinet 1 is detachable, main acquisition module and the power supply installed, during installation, it is indoor that earth connection cabinet 1 uprightly is placed on the security tool of transformer station, with the spacing of wall greater than 2cm, insert civil power;
Be provided with the up and down laminate 111 of energy in each drawer 11, the base plate of drawer 11 is respectively arranged with a spring 7 for four jiaos, laminate 111 is positioned at the top of drawer 11 base plates, one end of each spring 7 links to each other with base plate 111, the other end of each spring 7 then links to each other with laminate 111 bottoms of drawer 11, so, be installed in the spring 7 that also is connected in the drawer 11 and make laminate 111 have the trend of upwards lifting all the time with laminate 111, and laminate 111 can be up and down along with the strain of spring 7;
When being placed with earth connection in the drawer 11, laminate pressurized weight increases and spring 7 is touched in sinking, elastic deformation takes place in spring 7 under the pressure effect of laminate, make the bottom of laminate 111 be depressed into the top of transducer 2, and then triggering control switch 21, control switch 21 closures are so transducer 2 produces a switching signal; And after the earth connection in the drawer 11 took out, the load reduction of laminate, spring 7 upwards lifted laminate under the effect of elastic-restoring force, the top of transducer 2 is left in the bottom of laminate, transducer 2 make control switch 21 disconnect, so can produce another switching signal again; The illuminated facia of each drawer 11 can produce the indication variation according to the switching signal variation that respective sensor 2 is produced on the earth connection cabinet 1, and the user does not need to open drawer 11 just can know in the current drawer 11 whether deposited earth connection easily;
Drawer 11 also is provided with a plug-in unit 113 that is used to monitor these drawer 11 open and-shut modes at the back of side plate, the end of this plug-in unit 113 has touch switch, under the state that drawer 11 pushes fully, the backboard of the end of plug-in unit 113 and wiring cabinet 1 offsets, the touch switch closure, under the state that drawer 11 is pulled out or do not shut, the end of plug-in unit 113 breaks away from the backboard of wiring cabinet 1, touch switch disconnects, so, plug-in unit 113 also can produce a corresponding signal and be converted to the light on and off of indicator light when touch switch disconnects or be closed, the user in the monitoring grounding wire user mode simultaneously, also can monitor the reset mode of drawer 11 simultaneously, the back before use drawer 11 of assurance earth connection can be closed and put in place.
In the present embodiment, the switching signal that each transducer 2 sends can be gathered and store to collector 3, collector 3 is installed in the earth connection cabinet, in order to guarantee collector the functional reliability of stability is installed, collector 3 can be installed in the top of earth connection cabinet, collector 3 is provided with status indicator lamp and control DIP switch panel, adopt the DB9 connector to connect between collector 3 and the earth connection cabinet, the power supply of collector 3 is taken from the earth connection cabinet, eight switching value nodes of earth connection cabinet and a signal ground node altogether are connected respectively on 9 pins of this earth connection cabinet DB9 (pass) interface, concrete method of attachment as shown in Figure 6: 1. a switching value node connects 5 stitch of DB9 (pass) interface; 2. No. two switching value nodes connect 4 stitch of DB9 (aciculiform) interface 31; 3. No. three switching value nodes connect 3 stitch of DB9 (aciculiform) interface 31; 4. No. four switching value nodes connect 2 stitch of DB9 (aciculiform) interface 31; 5. No. five switching value nodes connect 1 stitch of DB9 (aciculiform) interface 31; 6. No. six switching value nodes connect 9 stitch of DB9 (aciculiform) interface 31; 7. No. seven switching value nodes connect 8 stitch of DB9 (aciculiform) interface 31; 8. No. eight switching value nodes connect 7 stitch of DB9 (aciculiform) interface 31; Signal is 6 stitch of ground node connection DB9 (aciculiform) interface 31 altogether; Then adopt DB9 (aciculiform) interface 31 to dock on the collector 3 with DB9 (pass) interface of earth connection cabinet 1.
Motion PLC technology between manifold 4 and the collector 3, connect the signal transmission that realizes each other by the three-phase and four-line light current line in the transformer station, and in manifold 4 and collector 3, be respectively arranged with the power carrier module, manifold 4 can by screw on metope or lie in the screen cabinet in, specifically decide on field condition;
Manifold 4 is provided with many group LED light, and the function of these indicator lights includes: I, malfunction indicator lamp: normal bright expression background manage software off line, manifold 4 off lines, earth connection cabinet 1 off line; Normal condition does not work.II, four winding ground wire cabinet indicator lights: if during earth connection cabinet off line, corresponding indicator light is bright; About 5 seconds of normal condition is once glittering.III, display screen indicator light: if the display screen off line, indicator light is bright; Normal condition does not work.IV, local area network (LAN) indicator light: as local area network (LAN) (server) off line, indicator light is bright; About 3 seconds of normal condition is once glittering.V, power carrier indicator light: if the power carrier module in power carrier module in the manifold 4 and the earth connection cabinet can't communication, indicator light is bright; Normal condition does not work.
Also the utilization PLC technology between manifold 4 and the display screen 5, and the light current line by three-phase and four-line connects and realizes transfer of data, be provided with the power carrier module in the display screen 5 equally, display screen 5 can show the current user mode of corresponding earth connection in the earth connection cabinet 1;
Manifold 4 also provides Ethernet interface, can insert the electric power local area network (LAN), the electric power local area network (LAN) is the Ethernet based on ICP/IP protocol, manifold 4 can be realized communication with the server 6 in the power office by local area network (LAN), database and background manage software are installed, server 6 can achieve a butt joint record, statistics and the management of ground wire user mode on the server 6.
As shown in Figure 7, be the system flow chart of present embodiment, this grounding wire monitoring device is by the achieve a butt joint monitoring of ground wire user mode of following steps:
Step 1: power at first for collector 3, manifold 4 and display screen 5 respectively, and start the background manage software of server 6;
Step 2: for guaranteeing between collector 3 and the manifold 4, can carrying out transfer of data smoothly between manifold 4 and the display screen 5, whether detect collector 3, manifold 4 and display screen 5 power carrier module separately can normal communication, if then carry out next step; If not, then carry out to interrupt, carry out malfunction elimination after, continue this step of circulation then;
Step 3: whether detection manifold 4 sets up network communication with background manage software is connected, and after daemon software started, Automatic Program was monitored the network port, if any the connection request of sending from the manifold 4 of distant place transformer station, then carries out next step; If not, rebulid network and connect, program continues to monitor connection request, continues this step of circulation;
Step 4: manifold 4 executive programs are patrolled and examined, and the switching signal that each transducer 2 sends in the collector 3 scanning earth connection cabinets changes and gives manifold 4 by power line utilization PLC technology with data information transfer;
Step 5: for avoiding interference, information dropout and the corrupted data in the data transmission procedure, manifold 4 will judge whether this data message is correct, complete after receiving the data message that collector 3 transmissions come, if then carry out next step, if not, then return step 4;
Step 6: manifold 4 will be sent to server 6 by local area network (LAN) from the data message that collector 3 receives, server 6 receives the current earth connection primary data and the record data of corresponding transformer station, be integrality and the accuracy of guaranteeing data, whether complete, correct server 6 can carry out checking and the judgement to data equally; And this manifold 4 also is sent to display screen 5 with the data message that receives by power carrier and shows that then, manifold 4 is proceeded program and patrolled and examined, and returns step 4 again.
Wherein, when earth connection takes out from drawer 11, or when earth connection put into drawer 11, transducer 2 senses can be sent corresponding switching signal by spring 7 deformation, this switching signal need continue 3 seconds effectively, that is to say, transducer 2 under laminate pressurized always continues 3 seconds, or the transducer under the laminate 2 broke away from the laminate bottom lasting 3 seconds, collector 3 can confirm that just this semaphore is effective, and then to whether there being earth connection to make judgement in the drawer 11, can prevent effectively like this because misoperation (as only be mobile earth connection in laminate the position or draw wrong drawer) and cause the false judgment of monitoring device, reduce the influence of external interference, the reliability of assurance device work to system.
In addition, after powering on, display screen 5 carries out initialization, and the video data that reception manifold 4 sends after initialization, if display screen 5 is received the data message that manifold 4 sends, be that the 8 passage constant-current driven chips of DM11C show data then by model, if Data Receiving failure, then display is proceeded initialization after waiting for several seconds, setting the initialized once more stand-by period is to shield in order to prevent that display from brushing at work continuously, influence the performance of display, the length of stand-by period can be carried out suitable adjustment according to the hardware condition and the need of work of display itself.
Claims (6)
1. transformer substation grounding wire monitoring device, include the earth connection cabinet that is arranged on transformer station, this earth connection cabinet has a plurality of separate and be built-in with the drawer of earth connection, it is characterized in that: be provided with the up and down laminate of energy in the described drawer, the below of this laminate is provided with elastic component, and this elastic component makes described laminate have the trend of upwards lifting all the time; Wherein, described transformer substation grounding wire monitoring device also includes:
Transducer is arranged on the laminate below of each described drawer, and the deformation quantity of the described elastic component of this sensor sensing also sends switching signal under the state that the deformation quantity of this elastic component changes;
Collector is arranged in the described earth connection cabinet, and described collector is connected with described sensor electrical, and this collector collection is also stored the described switching signal that each described transducer sends;
Manifold is electrically connected and realizes with described collector and the message transmission of this collector;
Display screen is electrically connected and realizes and the message transmission of this manifold that this display screen is used to show the current user mode of corresponding earth connection in the described earth connection cabinet with described manifold; And
Server is equipped with database and background manage software, and this server is connected with described manifold network by the electric power local area network (LAN).
2. transformer substation grounding wire monitoring device according to claim 1, it is characterized in that: described elastic component is a spring, described drawer is respectively arranged with a described spring at base plate four jiaos, described laminate is arranged on the top of described drawer-bottom board, and, one end of each described spring links to each other with described base plate, the other end of this spring links to each other with the laminate of described drawer bottom, described transducer is fixedly installed on the base plate of described drawer, the top of this transducer has a control switch, under the state that offsets at the laminate and the described transducer top of described drawer, described control switch closure, laminate at described drawer breaks away under the state at described transducer top, and described control switch disconnects.
3. transformer substation grounding wire monitoring device according to claim 2, it is characterized in that: also be provided with a touch switch that is used to monitor this drawer open and-shut mode on the described drawer, described touch switch is fixed on the back of described drawer back side panel, under the state that described drawer pushes fully, the backboard of described touch switch and described wiring cabinet offsets, this touch switch closure, under the state that described drawer is pulled out, described touch switch breaks away from the backboard of described wiring cabinet, and this touch switch disconnects.
4. transformer substation grounding wire monitoring device according to claim 1 is characterized in that: links to each other by power line between described collector and the described manifold, and, realize message transmission by power carrier between described collector and the described manifold.
5. transformer substation grounding wire monitoring device according to claim 1 is characterized in that: links to each other by power line between described manifold and the described display screen, and, realize message transmission by power carrier between described manifold and the described display screen.
6. transformer substation grounding wire monitoring device according to claim 1 is characterized in that: described electric power local area network (LAN) is the Ethernet based on ICP/IP protocol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201574477U CN201667491U (en) | 2010-04-08 | 2010-04-08 | Ground wire monitoring device used in transformer station |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201574477U CN201667491U (en) | 2010-04-08 | 2010-04-08 | Ground wire monitoring device used in transformer station |
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| CN201667491U true CN201667491U (en) | 2010-12-08 |
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| CN2010201574477U Expired - Lifetime CN201667491U (en) | 2010-04-08 | 2010-04-08 | Ground wire monitoring device used in transformer station |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101820139A (en) * | 2010-04-08 | 2010-09-01 | 宁波电业局 | Transformer substation grounding wire monitoring device and monitoring method thereof |
| CN102231571A (en) * | 2011-07-12 | 2011-11-02 | 镇江市科捷电器有限公司 | Ground wire on-line monitor system |
| CN102842959A (en) * | 2011-06-20 | 2012-12-26 | 辽宁省电力有限公司盘锦供电公司 | Anti-error monitoring system of ground wire |
| CN102904182A (en) * | 2012-11-12 | 2013-01-30 | 奉化市供电局 | Intelligent ground wire management box |
| CN102946146A (en) * | 2012-11-28 | 2013-02-27 | 奉化市供电局 | Ground lead monitoring system |
| CN103117601A (en) * | 2013-03-06 | 2013-05-22 | 江苏省电力公司无锡供电公司 | Transformer substation ground lead remote monitoring device based on wireless sensor network |
| CN104393677A (en) * | 2014-11-25 | 2015-03-04 | 国家电网公司 | System and method for centralized management on earth wires |
| CN104635522A (en) * | 2013-11-14 | 2015-05-20 | 国家电网公司 | Power system safety control device and system |
| CN111860734A (en) * | 2019-04-30 | 2020-10-30 | Em微电子马林有限公司 | Tamper detection device |
| CN112736502A (en) * | 2020-12-02 | 2021-04-30 | 辽宁拓新电力电子有限公司 | Temporary grounding wire device |
-
2010
- 2010-04-08 CN CN2010201574477U patent/CN201667491U/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101820139A (en) * | 2010-04-08 | 2010-09-01 | 宁波电业局 | Transformer substation grounding wire monitoring device and monitoring method thereof |
| CN101820139B (en) * | 2010-04-08 | 2012-02-22 | 宁波电业局 | Transformer substation grounding wire monitoring device and monitoring method thereof |
| CN102842959A (en) * | 2011-06-20 | 2012-12-26 | 辽宁省电力有限公司盘锦供电公司 | Anti-error monitoring system of ground wire |
| CN102231571A (en) * | 2011-07-12 | 2011-11-02 | 镇江市科捷电器有限公司 | Ground wire on-line monitor system |
| CN102904182B (en) * | 2012-11-12 | 2016-01-13 | 奉化市供电局 | A kind of smart grounding wire management box |
| CN102904182A (en) * | 2012-11-12 | 2013-01-30 | 奉化市供电局 | Intelligent ground wire management box |
| CN102946146A (en) * | 2012-11-28 | 2013-02-27 | 奉化市供电局 | Ground lead monitoring system |
| CN103117601A (en) * | 2013-03-06 | 2013-05-22 | 江苏省电力公司无锡供电公司 | Transformer substation ground lead remote monitoring device based on wireless sensor network |
| CN104635522A (en) * | 2013-11-14 | 2015-05-20 | 国家电网公司 | Power system safety control device and system |
| CN104393677A (en) * | 2014-11-25 | 2015-03-04 | 国家电网公司 | System and method for centralized management on earth wires |
| CN111860734A (en) * | 2019-04-30 | 2020-10-30 | Em微电子马林有限公司 | Tamper detection device |
| CN111860734B (en) * | 2019-04-30 | 2022-11-29 | Em微电子马林有限公司 | Tamper detection device |
| CN112736502A (en) * | 2020-12-02 | 2021-04-30 | 辽宁拓新电力电子有限公司 | Temporary grounding wire device |
| CN112736502B (en) * | 2020-12-02 | 2024-01-16 | 辽宁拓新电力电子有限公司 | Temporary grounding wire device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20101208 Effective date of abandoning: 20120222 |