CN110579673B - Leakage current measurement and control system and method for insulating bucket arm vehicle - Google Patents
Leakage current measurement and control system and method for insulating bucket arm vehicle Download PDFInfo
- Publication number
- CN110579673B CN110579673B CN201910845005.7A CN201910845005A CN110579673B CN 110579673 B CN110579673 B CN 110579673B CN 201910845005 A CN201910845005 A CN 201910845005A CN 110579673 B CN110579673 B CN 110579673B
- Authority
- CN
- China
- Prior art keywords
- leakage current
- insulating
- bucket arm
- arm vehicle
- monitoring system
- 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
Links
Images
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention relates to a system and a method for measuring and controlling leakage current of an insulating bucket arm vehicle, wherein the system comprises the following components: a ground wire leakage current monitoring system and a supporting leg leakage current monitoring system; the ground wire leakage current monitoring system is connected in series into a grounding circuit of the insulating bucket arm vehicle, and measures the leakage current of the grounding circuit of the insulating bucket arm vehicle in real time; two panels are arranged on two side surfaces of the support plate of each support leg, a current sampling circuit is arranged between the two panels on any support leg, and the current sampling circuit measures leakage current of the support leg in real time; and monitoring the leakage current of the insulating bucket arm vehicle in real time, wherein the leakage current is the sum of the leakage current of the grounding line and the leakage current of each supporting leg. The leakage current of the insulating bucket arm vehicle is determined through the current on all leakage current paths of the insulating bucket arm vehicle, the problem that the leakage current which is small in magnitude and directly goes to measure the motion state and the insulating arm with a higher position is inconvenient is solved, and the method has positive value in the application field of the insulating bucket arm vehicle.
Description
Technical Field
The invention relates to the field of live-wire work, in particular to a leakage current measurement and control system and method for an insulating bucket arm vehicle.
Background
Live working is because of can reduce the power failure scope by a wide margin, reduce the power off time, save the power supply family hour and improve advantages such as power supply reliability and the like and developed rapidly, insulating arm car is a special vehicle that carries out equipotential operation in the place that the traffic is convenient and wiring is complicated, be the important safety guarantee equipment in the live working field, to a great extent has decided the safety of operation personnel and equipment, it just must pay attention to the leakage current of live line to the second constantly to utilize insulating arm car to carry out the operation, this is to under the pole personnel, the personnel on the car or the ground of vehicle direct contact form the safeguard measure that the field operation personnel are endangered to step voltage.
However, the insulating arm car has high working voltage level and small leakage current, and is usually microampere-level, so that the technical difficulty in measuring the leakage current of the insulating arm car is high, and a comprehensive and effective method for measuring and controlling the leakage current of the insulating arm car is lacked.
Disclosure of Invention
The invention provides a leakage current measurement and control method for an insulating arm vehicle, aiming at the technical problems in the prior art and solving the problem of small leakage current and high measurement difficulty of the working voltage of the insulating arm vehicle.
The technical scheme for solving the technical problems is as follows: the utility model provides an insulating arm car leakage current system of observing and controling, insulating arm car includes the landing leg, the system includes: a ground wire leakage current monitoring system and a supporting leg leakage current monitoring system;
the ground wire leakage current monitoring system is connected in series into a ground line of the insulating bucket arm vehicle, and measures the leakage current of the ground line of the insulating bucket arm vehicle in real time;
the landing leg leakage current monitoring system comprises a panel made of a conductive material and a current sampling circuit; two panels which are in contact with the support plate are arranged on two side faces of the support plate made of the insulating material of each support leg, a current sampling circuit is arranged between the two panels on any one support leg, and the current sampling circuit measures the leakage current of the support leg in real time;
and monitoring the leakage current of the insulating bucket arm vehicle in real time, wherein the leakage current is the sum of the leakage current of the grounding line and the leakage current of each supporting leg.
A method for measuring and controlling leakage current of an insulated arm trolley comprises the following steps:
and 3, alarming when the leakage current of the insulating bucket arm vehicle exceeds a set threshold value.
The invention has the beneficial effects that: the leakage current of the insulating bucket arm vehicle is determined through the current on all leakage current paths of the insulating bucket arm vehicle, the problem that the leakage current with small magnitude is inconvenient when the insulating arm with a higher position directly measures the motion state is solved, and the method has positive value in the application field of the insulating bucket arm vehicle.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the current sampling circuit comprises a sampling resistor and a voltage detection circuit which are connected in parallel;
the two ends of the sampling resistor are respectively connected with the two panels, and the voltage detection circuit measures the voltage at the two ends of the sampling resistor in real time to obtain the leakage current of the supporting legs corresponding to the current passing through the sampling resistor.
Furthermore, the ground wire leakage current monitoring system and the supporting leg leakage current monitoring system respectively comprise a wireless communication module, and the measured leakage current of the ground wire or the leakage current of each supporting leg is sent out through the wireless communication module.
Furthermore, the system also comprises a main control module and an alarm module;
the main control module receives the leakage current of the grounding line and the leakage current of each supporting leg sent by the grounding line leakage current monitoring system and each supporting leg leakage current monitoring system to obtain the corresponding leakage current of the insulating bucket arm vehicle;
and when the obtained leakage current of the insulating bucket arm vehicle exceeds a set threshold value, the main control module controls the alarm module to send out an alarm signal.
Further, the threshold value of the leakage current is set according to the type of the insulation arm vehicle and the actual working voltage level of the insulation arm vehicle.
Further, the alarm module is a sound and light alarm module, and the alarm signal is to give out alarm sound and flash.
The beneficial effect of adopting the further scheme is that: the current sampling circuit comprises a sampling resistor and a voltage detection circuit which are connected in parallel, the sampling resistor of an ohm level is directly connected in series between two metal panels, and the resistance value of the sampling resistor is far smaller than that of a support plate made of an insulating material, so that the leakage current of the supporting leg can be considered to completely flow through the sampling resistor, the voltages at two ends of the sampling resistor are in direct proportion to the leakage current of the supporting leg, the leakage current of the supporting leg is obtained through calculation of the voltage sampling circuit, the structure is simple, and the calculation process is convenient.
Real-time leakage current is sent to the main control module in a wireless mode, alarm prompt can be immediately carried out when the leakage current exceeds a set threshold value, and the threshold value of the leakage current can be flexibly set according to the type of the insulating arm car, the actual working voltage grade of the insulating arm car and the like.
Drawings
Fig. 1 is a block diagram of a leakage current measurement and control system of an insulated arm car according to the present invention;
fig. 2 is a schematic view of an embodiment in which the leakage current measurement and control system of the insulated arm trolley provided by the invention is arranged on the insulated arm trolley;
fig. 3 is a schematic structural diagram of a current sampling circuit in an embodiment of the leakage current measurement and control system of the insulated arm trolley provided by the invention;
fig. 4 is a structural block diagram of an embodiment of a leakage current measurement and control system of an insulated arm car according to the present invention;
fig. 5 is a flowchart of an embodiment of a method for measuring and controlling leakage current of an insulated arm car according to the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1. the ground wire leakage current monitoring system comprises a ground wire leakage current monitoring system 2, a supporting leg leakage current monitoring system 21, a panel 22, a current sampling circuit 3, a main control module 4 and an alarm module.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
The insulating bucket arm vehicle can generally perform live-line aerial work on a line which is larger than l0kV, and a working bucket, a working arm, a control oil circuit, a line and a bucket arm joint part of the insulating bucket arm vehicle can meet certain insulating performance indexes and are provided with supporting legs and grounding wires. Fig. 1 is a block diagram showing a structure of an insulation boom vehicle leakage current measurement and control system according to the present invention, and fig. 2 is a schematic diagram showing an embodiment in which the insulation boom vehicle leakage current measurement and control system according to the present invention is provided on an insulation boom vehicle, and it can be seen from fig. 1 and fig. 2 that the insulation boom vehicle leakage current measurement and control system according to the present invention includes a ground wire leakage current monitoring system 1 and a leg leakage current monitoring system 2.
The ground wire leakage current monitoring system 1 is connected in series into a grounding circuit of the insulating bucket arm vehicle, and measures the leakage current of the grounding circuit of the insulating bucket arm vehicle in real time.
The landing leg leakage current monitoring system 2 comprises a panel 21 made of conductive materials and a current sampling circuit 22; two panels 21 which are in contact with the support plate are arranged on two side faces of the support plate made of the insulating material of each support leg, a current sampling circuit 22 is arranged between the two panels 21 on any support leg, and the current sampling circuit 22 measures the leakage current of the support leg in real time.
And monitoring the leakage current of the insulating bucket arm vehicle in real time, wherein the leakage current is the sum of the leakage current of the grounding line and the leakage current of each supporting leg.
The support legs of the insulated bucket arm vehicle are generally of a hydraulic telescopic structure and are used for supporting the bucket arm vehicle in the operation of the overhead device and keeping or increasing the stability of the bucket arm vehicle. According to the leakage current measurement and control system for the insulating bucket arm vehicle, the leakage current of the insulating bucket arm vehicle is determined by measuring all lines of the insulating bucket arm vehicle, including leakage currents of all supporting legs and a grounding wire, which are in contact with the ground, namely the leakage current of the insulating bucket arm vehicle is determined by currents on all leakage current paths of the insulating bucket arm vehicle, the problem that the leakage current of an insulating bucket arm vehicle is inconvenient to measure the motion state and the magnitude of an insulating arm with a higher position is small is solved, and the leakage current measurement and control system has positive value in the application field of the insulating bucket arm vehicle.
Example 1
The embodiment I provided by the invention is an embodiment of a leakage current measurement and control system of an insulating bucket arm vehicle, and the leakage current measurement and control system of the insulating bucket arm vehicle provided by the invention comprises a grounding wire leakage current monitoring system 1 and a supporting leg leakage current monitoring system 2.
The ground wire leakage current monitoring system 1 is connected in series into a grounding circuit of the insulating bucket arm vehicle, and measures the leakage current of the grounding circuit of the insulating bucket arm vehicle in real time.
The landing leg leakage current monitoring system 2 comprises a panel 21 made of conductive materials and a current sampling circuit 22; two panels 21 in contact with the support plate are arranged on two side surfaces of the support plate made of insulating material of each support leg, and a current sampling circuit 22 is arranged between the two panels 21 on any one support leg.
Fig. 3 is a schematic structural diagram of a current sampling circuit in an embodiment of the leakage current measurement and control system of the insulated arm trolley according to the present invention. As can be seen from fig. 3, the current sampling circuit 22 includes a sampling resistor and a voltage detection circuit connected in parallel, and both ends of the sampling resistor are connected to the two panels 21, respectively. The voltage detection circuit measures voltages at two ends of the sampling resistor in real time to obtain the leakage current of the corresponding supporting leg as the current passing through the sampling resistor.
The resistance of the sampling resistor is in ohm level.
The support plate of the hydraulic support leg takes an insulating material as a main body, the panel 21 can be made of metal, the panel 21 made of metal is embedded into two side faces of the support plate, an ohm-level sampling resistor is directly connected between the two metal panels 21 in series, and because the resistance value of the sampling resistor is far smaller than that of the support plate made of the insulating material, the leakage current of the support leg can be considered to completely flow through the sampling resistor, so that the voltages at two ends of the support leg are in direct proportion to the leakage current of the support leg, and the leakage current of the support leg is obtained through calculation of a voltage sampling circuit.
In the embodiment of the leakage current measurement and control system of the insulating boom truck, the ground wire leakage current monitoring system 1 and the supporting leg leakage current monitoring system 2 respectively comprise wireless communication modules, and the measured leakage current of the ground wire and the leakage current of each supporting leg are sent out through the wireless communication modules.
As shown in fig. 4, which is a structural block diagram of an embodiment of the leakage current measurement and control system of the insulated arm vehicle provided by the present invention, as can be seen from fig. 4, the types of the legs of the insulated arm vehicle can be selected according to the situation, the number of the legs is generally four, the system also includes a main control module 3 and an alarm module 4 in the case that the system includes four legs.
The main control module 3 receives the leakage current of the grounding line and the leakage current of each supporting leg sent by the grounding line leakage current monitoring system 1 and each supporting leg leakage current monitoring system 2 to obtain the leakage current of the corresponding insulating arm vehicle, and controls the alarm module 4 to send out an alarm signal when the obtained leakage current of the insulating arm vehicle exceeds a set threshold value.
The threshold value of the leakage current in the main control module 3 can be flexibly set according to the type of the insulating arm vehicle, the actual working voltage grade of the insulating arm vehicle and the like.
The alarm module 4 can be a sound and light alarm module, and the alarm signal is to give out alarm sound and flash.
Example 2
And 2, calculating the leakage current of the insulating arm vehicle as the sum of the leakage current of the grounding line and the leakage current of each supporting leg.
And 3, alarming when the leakage current of the insulating bucket arm vehicle exceeds a set threshold value.
According to the method for measuring and controlling the leakage current of the insulating bucket arm truck, the leakage current of the insulating bucket arm truck is determined by measuring all lines, including leakage currents of all supporting legs and a grounding wire, of the insulating bucket arm truck, namely the leakage current of the insulating bucket arm truck is determined by currents on all leakage current paths of the insulating bucket arm truck, and the problem that the leakage current of an insulating arm truck with a high position is inconvenient to measure in a motion state directly is solved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. The utility model provides an insulating arm car leakage current system of observing and controling, insulating arm car includes the landing leg, its characterized in that, the system includes: a ground wire leakage current monitoring system and a supporting leg leakage current monitoring system;
the ground wire leakage current monitoring system is connected in series into a ground line of the insulating bucket arm vehicle, and measures the leakage current of the ground line of the insulating bucket arm vehicle in real time;
the landing leg leakage current monitoring system comprises a panel made of a conductive material and a current sampling circuit; two panels which are in contact with the support plate are arranged on two side faces of the support plate made of the insulating material of each support leg, a current sampling circuit is arranged between the two panels on any one support leg, and the current sampling circuit measures the leakage current of the support leg in real time;
monitoring the leakage current of the insulating bucket arm vehicle in real time as the sum of the leakage current of the grounding line and the leakage current of each supporting leg;
the current sampling circuit comprises a sampling resistor and a voltage detection circuit which are connected in parallel;
the two ends of the sampling resistor are respectively connected with the two panels, and the voltage detection circuit measures the voltages at the two ends of the sampling resistor in real time to obtain the current passing through the sampling resistor as the leakage current of the corresponding supporting leg;
the ground wire leakage current monitoring system and the supporting leg leakage current monitoring system respectively comprise wireless communication modules, and measured leakage current of the ground circuit or the leakage current of each supporting leg is sent out through the wireless communication modules.
2. The system of claim 1, further comprising a master control module and an alarm module;
the main control module receives the leakage current of the grounding line and the leakage current of each supporting leg sent by the grounding line leakage current monitoring system and each supporting leg leakage current monitoring system to obtain the corresponding leakage current of the insulating bucket arm vehicle;
and when the obtained leakage current of the insulating bucket arm vehicle exceeds a set threshold value, the main control module controls the alarm module to send out an alarm signal.
3. The system of claim 2, wherein the threshold value of leakage current is set based on a type of the arm car and an actual operating voltage level of the arm car.
4. The system of claim 2, wherein the alarm module is a sound and light alarm module, and the alarm signal is an alarm sound and a flash.
5. A method of monitoring the leakage current monitoring system of an insulated arm car according to any of claims 1 to 4, the method comprising:
step 1, measuring leakage current of a grounding line of the insulating bucket arm vehicle and leakage current of each supporting leg in real time;
step 2, calculating the leakage current of the insulating bucket arm vehicle as the sum of the leakage current of the grounding line and the leakage current of each supporting leg;
and 3, alarming when the leakage current of the insulating bucket arm vehicle exceeds a set threshold value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910845005.7A CN110579673B (en) | 2019-09-07 | 2019-09-07 | Leakage current measurement and control system and method for insulating bucket arm vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910845005.7A CN110579673B (en) | 2019-09-07 | 2019-09-07 | Leakage current measurement and control system and method for insulating bucket arm vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110579673A CN110579673A (en) | 2019-12-17 |
| CN110579673B true CN110579673B (en) | 2021-10-19 |
Family
ID=68812698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910845005.7A Active CN110579673B (en) | 2019-09-07 | 2019-09-07 | Leakage current measurement and control system and method for insulating bucket arm vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110579673B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112611980A (en) * | 2021-01-07 | 2021-04-06 | 国网浙江省电力有限公司丽水供电公司 | Grounding device of insulating bucket arm vehicle |
| CN114779122B (en) * | 2022-06-20 | 2022-09-16 | 国网山东省电力公司东营供电公司 | Method and device for detecting state of arm vehicle based on historical data in live-wire work |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103728540A (en) * | 2013-12-27 | 2014-04-16 | 国家电网公司 | Alternating-current / direct-current voltage withstand testing device for arc discharge monitoring |
| CN105158630A (en) * | 2015-09-02 | 2015-12-16 | 国家电网公司 | System for testing and taking leakage current of tested piece directly and conveniently |
| CN205301474U (en) * | 2015-09-02 | 2016-06-08 | 国家电网公司 | Examination article leakage current and wireless output data's testing system is got in survey |
| CN106771805A (en) * | 2016-12-09 | 2017-05-31 | 南京理工大学 | A kind of hot line robot Detecting Methods of MOA |
| CN107727916A (en) * | 2017-10-18 | 2018-02-23 | 广西电网有限责任公司南宁供电局 | 10kV aerial lift device with insulating arm for live working Leakage Current monitoring devices |
| CN109142942A (en) * | 2017-07-06 | 2019-01-04 | 天津中铁电气化设计研究院有限公司 | A kind of power supply system Traction networks that positive and negative anodes insulate leakage monitoring system over the ground |
| CN109856460A (en) * | 2019-01-24 | 2019-06-07 | 国网山东省电力公司日照供电公司 | A kind of power distribution station grounding resistor monitoring system and monitoring method |
| CN109959848A (en) * | 2019-03-13 | 2019-07-02 | 国网安徽省电力有限公司芜湖供电公司 | A kind of electrical component compression test platform and test method |
-
2019
- 2019-09-07 CN CN201910845005.7A patent/CN110579673B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103728540A (en) * | 2013-12-27 | 2014-04-16 | 国家电网公司 | Alternating-current / direct-current voltage withstand testing device for arc discharge monitoring |
| CN105158630A (en) * | 2015-09-02 | 2015-12-16 | 国家电网公司 | System for testing and taking leakage current of tested piece directly and conveniently |
| CN205301474U (en) * | 2015-09-02 | 2016-06-08 | 国家电网公司 | Examination article leakage current and wireless output data's testing system is got in survey |
| CN106771805A (en) * | 2016-12-09 | 2017-05-31 | 南京理工大学 | A kind of hot line robot Detecting Methods of MOA |
| CN109142942A (en) * | 2017-07-06 | 2019-01-04 | 天津中铁电气化设计研究院有限公司 | A kind of power supply system Traction networks that positive and negative anodes insulate leakage monitoring system over the ground |
| CN107727916A (en) * | 2017-10-18 | 2018-02-23 | 广西电网有限责任公司南宁供电局 | 10kV aerial lift device with insulating arm for live working Leakage Current monitoring devices |
| CN109856460A (en) * | 2019-01-24 | 2019-06-07 | 国网山东省电力公司日照供电公司 | A kind of power distribution station grounding resistor monitoring system and monitoring method |
| CN109959848A (en) * | 2019-03-13 | 2019-07-02 | 国网安徽省电力有限公司芜湖供电公司 | A kind of electrical component compression test platform and test method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110579673A (en) | 2019-12-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103278776B (en) | A kind of batteries of electric automobile Insulation Inspection System | |
| CN110579673B (en) | Leakage current measurement and control system and method for insulating bucket arm vehicle | |
| CN203324463U (en) | Performance test and evaluation platform for small-current grounding line selection device | |
| CN109696582A (en) | Insulation resistance detection circuit and its detection method | |
| CN111781427A (en) | Live detection system and method for single-ended grounding loop resistor of cable | |
| CN103558506B (en) | Non-implanted formula DC system earth fault lookup method and device thereof | |
| CN106707030B (en) | Method and device for measuring ground impedance and power loss of distribution transformer | |
| CN105182044A (en) | Ultrahigh voltage DC arrester state detection device with Hall sensor acting as framework | |
| CN105652098A (en) | Ground resistance detection and analysis system adopting solar energy to supply power | |
| CN201886084U (en) | Direct current insulation monitoring system capable of overcoming relaying protection misoperation | |
| CN104210386B (en) | The restraining device of isolated rail joint place Railway wheelset electric arc | |
| CN103050907B (en) | Security maintenance method for common grounding electrode of direct current power transmission systems | |
| BR102017026315A2 (en) | METHOD FOR DETECTING RAIL RAIL BREAK, RAIL RAIL BREAK DETECTION SYSTEM AND RAIL RAIL BREAK DETECTOR DEVICE | |
| CN205176141U (en) | Electric automobile battery insulation detecting system | |
| CN205103292U (en) | Acquisition unit based on two hall element reveal electric current to special high voltage direct current arrester | |
| CN203405561U (en) | Direct current power source grounding fault searching device | |
| CN107664718B (en) | HVDC thyristor level DC voltage-sharing resistor dynamic parameter online monitoring method | |
| CN202528865U (en) | Automatic electric drainage cabinet | |
| CN204945313U (en) | A kind of high voltage direct current distribution insulation against ground supervisory device | |
| RU171479U1 (en) | Resistive grounding device | |
| CN105223473A (en) | A kind of stage high-tension circuit trouble hunting device | |
| CN214473593U (en) | Rail insulation detection device special for rail vehicle and rail vehicle | |
| CN103308770A (en) | Network system for power supply line impedance loss type electrical failure fire hazard detector | |
| CN104635055A (en) | Unbalanced bridge insulation measuring circuit of direct-current power supply | |
| CN113818021A (en) | Constant potential rectifier with multiple main rectifier units and one standby rectifier unit capable of being automatically switched |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 430000 Floor 5-6 of Building A8, Phase I of Rongke Zhigu Industrial Project, 555 Cultural Avenue, Hongshan District, Wuhan City, Hubei Province Patentee after: WUHAN LEAD ELECTRIC POWER TECHNOLOGY Co.,Ltd. Address before: 430000 floors 2-6, building A8, Rongke Zhigu industrial project phase I, Liqiao village, Hongshan District, Wuhan City, Hubei Province Patentee before: WUHAN LEAD ELECTRIC POWER TECHNOLOGY Co.,Ltd. |
|
| CP02 | Change in the address of a patent holder | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A leakage current measurement and control system and method for insulated bucket truck Effective date of registration: 20220519 Granted publication date: 20211019 Pledgee: Guanggu Branch of Wuhan Rural Commercial Bank Co.,Ltd. Pledgor: WUHAN LEAD ELECTRIC POWER TECHNOLOGY Co.,Ltd. Registration number: Y2022420000122 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |