CN116106695A - On-line monitoring system for running state of medium-high voltage switch cabinet - Google Patents
On-line monitoring system for running state of medium-high voltage switch cabinet Download PDFInfo
- Publication number
- CN116106695A CN116106695A CN202211623273.2A CN202211623273A CN116106695A CN 116106695 A CN116106695 A CN 116106695A CN 202211623273 A CN202211623273 A CN 202211623273A CN 116106695 A CN116106695 A CN 116106695A
- Authority
- CN
- China
- Prior art keywords
- switch cabinet
- information
- module
- data
- high voltage
- 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.)
- Pending
Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 48
- 238000013523 data management Methods 0.000 claims abstract description 35
- 238000005259 measurement Methods 0.000 claims abstract description 9
- 238000012806 monitoring device Methods 0.000 claims abstract description 4
- 238000007726 management method Methods 0.000 claims description 21
- 238000004891 communication Methods 0.000 claims description 15
- 230000001052 transient effect Effects 0.000 claims description 6
- 230000007547 defect Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1209—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using acoustic measurements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/0096—Radiation pyrometry, e.g. infrared or optical thermometry for measuring wires, electrical contacts or electronic systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/22—Indexing; Data structures therefor; Storage structures
- G06F16/2282—Tablespace storage structures; Management thereof
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F8/00—Arrangements for software engineering
- G06F8/30—Creation or generation of source code
- G06F8/31—Programming languages or programming paradigms
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Software Systems (AREA)
- Theoretical Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Computing Systems (AREA)
- Computer Networks & Wireless Communication (AREA)
- Acoustics & Sound (AREA)
- Data Mining & Analysis (AREA)
- Databases & Information Systems (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses an on-line monitoring system for the running state of a medium-high voltage switch cabinet, which comprises the following components: the system comprises a measurement subsystem, a software subsystem, a data management module and a power module; the measuring subsystem is used for monitoring the information of the switch cabinet and sending the information of the switch cabinet to the data management module through the software subsystem; the software subsystem is used for creating related Qt items through the Qt Creator unit for programming; the related Qt project acquires switch cabinet information from the data management module, and after program judgment and program storage operation are carried out on the switch cabinet data, the judged switch cabinet running state information is sent to the data management module; the data management module is used for storing the received switch cabinet information and the switch cabinet running state information; the power supply module adopts 220V alternating current power supply and is used for supplying power to each monitoring device in the switch cabinet; the system can improve the detection efficiency of the switch cabinet.
Description
Technical Field
The invention belongs to the technical field of on-line monitoring of switch cabinet states, and particularly relates to an on-line monitoring system for the running states of a medium-high voltage switch cabinet.
Background
With the continuous development of the power grid, the switch cabinet is an important device in the power system, and the working condition of the switch cabinet directly influences the power supply reliability of the power grid. Meanwhile, as a plurality of electrical elements are integrated in the switch cabinet, the structure is compact, the space gap is small, the equipment is in a closed and electrified state, and partial discharge and abnormal temperature rise are easy to occur when the equipment works in a high-voltage and high-current environment for a long time, so that insulation faults are caused.
When the traditional medium-high voltage switch cabinet operates, workers are required to carry out field inspection, planned power failure maintenance is also required to be carried out when the switch cabinet is overhauled, but the internal structure of the switch cabinet is complex, the switch cabinet has more high-voltage devices, the workers are difficult to detect and analyze important indexes, and the insulativity and the electrical strength are difficult to directly measure and calculate, so that the working strength of the workers is greatly improved; and the switching equipment is required to be used during power failure maintenance, so that the working reliability of the switching equipment is reduced and the insulation aging is accelerated by frequently using the switching equipment. On one hand, the manual maintenance lacks of real-time monitoring of the switch cabinet, and information cannot be provided for operators in time; on the other hand, because the monitoring data is single, the real-time state of the switch cabinet is difficult to effectively monitor and the insulation performance of the switch cabinet is difficult to analyze, and the working condition of the switch cabinet cannot be reflected by multiple monitoring data. Therefore, an online real-time monitoring system is necessary to be established to reflect the running state of the switch cabinet, so that the monitoring efficiency is improved, the purposes of rapidly positioning the fault position and overhauling are achieved, and the power supply reliability is improved.
Disclosure of Invention
In view of the above problems, the invention provides an on-line monitoring system for the operation state of a medium-high voltage switch cabinet, which at least solves the technical problems of the above parts, ensures that a worker can monitor the operation state of the switch cabinet in real time, and realizes the improvement of monitoring efficiency.
The embodiment of the invention provides an on-line monitoring system for the running state of a medium-high voltage switch cabinet, which comprises the following components: the system comprises a measurement subsystem, a software subsystem, a data management module and a power module; wherein:
the measuring subsystem is used for monitoring the information of the switch cabinet and sending the information of the switch cabinet to the data management module through the software subsystem;
the software subsystem is used for creating related Qt items through the Qt Creator unit for programming; the related Qt items acquire the switch cabinet information from the data management module, and after program judgment and program storage operation are carried out on the switch cabinet data, the judged switch cabinet running state information is sent to the data management module;
the data management module is used for storing the received switch cabinet information and switch cabinet operation state information;
the power supply module adopts 220V alternating current power supply and is used for supplying power to each monitoring device in the switch cabinet.
Further, the program judging operation comprises program judging of the switch cabinet temperature data and the partial discharge data in the received switch cabinet information, and if the switch cabinet fails, alarming time, alarming state grade, alarming type and defect type id are obtained.
Further, the program storage operation includes storing data obtained by judging the program.
Further, the system also comprises an alarm module; the alarm module comprises a buzzer;
and the buzzer is used for alarming according to the running state information of the target switch cabinet.
Further, the measurement subsystem includes: an ultrasonic sensor, a transient ground voltage sensor and an infrared temperature sensor;
the ultrasonic sensor and the transient state ground voltage sensor are used for monitoring partial discharge signals of the switch cabinet;
the infrared temperature measuring sensor is used for monitoring the temperature of the inlet and outlet wires of the switch cabinet.
Further, the software subsystem further comprises a front-end page management unit;
the front-end page management unit acquires the switch cabinet information and the switch cabinet running state information in the data management module through a program language and is also used for acquiring alarm information.
Further, the data management module includes: mySQL database and database management tool;
the MySQL database is used for storing the received switch cabinet information and the switch cabinet running state information;
the database management tool is used for creating a correlation table to manage information data in the MySQL database.
Further, the database management tool is Navicat Premium software.
Further, data transmission is carried out to the MySQL database through the wired communication sub-module and the wireless communication sub-module;
the wired communication sub-module is suitable for field data reading and expanding equipment compatibility of the one-to-many signal buses and the signal auxiliary lines;
the wireless communication sub-module is used for real-time monitoring and background communication of the handheld terminal, and real-time monitoring and online state assessment of the running state of the target switch cabinet are realized.
Compared with the prior art, the on-line monitoring system for the running state of the medium-high voltage switch cabinet has the following beneficial effects: the invention overcomes the defect that the traditional switch cabinet monitoring is difficult to effectively monitor the real-time state of the switch cabinet and analyze the insulation performance of the switch cabinet, achieves the purpose of reflecting the comprehensive operation state of the switch cabinet in real time, realizes the rapid positioning of fault types and fault places, and improves the maintenance efficiency and the power supply reliability of the power system.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
fig. 1 is a schematic diagram of an on-line monitoring system frame for an operation state of a medium-high voltage switch cabinet according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Referring to fig. 1, an embodiment of the present invention provides an on-line monitoring system for an operation state of a medium-high voltage switch cabinet, including: the system comprises a measurement subsystem, a software subsystem, a data management module and a power module; wherein: the measurement subsystem is used for monitoring the information of the switch cabinet and sending the information of the switch cabinet to the data management module through the software subsystem; the software subsystem is used for creating related Qt items through the Qt Creator unit for programming; the related Qt project acquires switch cabinet information from the data management module, carries out program judgment and program storage operation on the switch cabinet data, and sends the judged switch cabinet running state information to the data management module; the data management module is used for storing the received switch cabinet information and the switch cabinet running state information; the power module adopts 220V alternating current power supply for supplying power to each monitoring device in the switch cabinet.
The above-described respective subsystems and modules are described in detail below.
1. Measurement subsystem:
the measuring subsystem is used for monitoring information of the switch cabinet; the information of the switch cabinet comprises information such as partial discharge signals, incoming and outgoing line temperatures, platforms, rooms, switch cabinet equipment IDs, switch cabinet plane schematic diagrams and 3D schematic diagrams of the switch cabinet, data monitoring information of a multifunctional meter and the like of the switch cabinet; the partial discharge signals comprise a switch cabinet ultrasonic signal and a transient state ground voltage signal; the measurement subsystem transmits and stores the acquired information of the switch cabinet to the data management module after the information of the switch cabinet is subjected to programming language operation through the software subsystem;
the measuring subsystem at least comprises two types of sensor units, wherein the first type of sensor unit is used for monitoring partial discharge signals in the measuring system and comprises an ultrasonic sensor and a transient ground voltage sensor; the second type of sensor unit is used for monitoring the temperature of an incoming line and an outgoing line in a measuring system and comprises an infrared temperature measuring sensor.
2. The software subsystem:
the software subsystem is a bridge between the measurement subsystem and the data management module; the software subsystem comprises a Qt Creator unit and a front-end page management unit; wherein:
the Qt Creator unit creates related Qt items through Qt Creator software to program, the related Qt items acquire switch cabinet information from the data management module, and program judgment and program storage operation are performed on the switch cabinet data; the Qt Creator software is operated through a program language, and the judged operation state information and the comprehensive state evaluation data of the switch cabinet are sent to a MySQL database of the data management module; program judging operation, which comprises program judging of switch cabinet temperature data and partial discharge data in the received switch cabinet information, and obtaining data such as alarm time, alarm state grade, alarm type, defect type id and the like if the switch cabinet fails; the program storage operation comprises the steps of storing data obtained by judging the program, and based on the data, staff can intuitively check historical information data and fault information data of the switch cabinet in a data management module, wherein the data comprise alarm time, alarm state grade, alarm type, defect type id and the like;
the Qt Creator software not only has cross-platform characteristics, but also has high efficiency and excellent mechanism compared with software such as flex build, and the like, and the working efficiency is greatly improved by using the C++ program language facing objects to enable staff to put more energy on core functions;
the front-end page management unit acquires the switch cabinet information, the switch cabinet running state information and the comprehensive state evaluation data in the data management module in real time through a program language, so that a worker can conveniently conduct remote monitoring, and the worker can select a certain switch cabinet and carefully check the data monitoring information of a platform, a room, a switch cabinet equipment ID, a switch cabinet schematic diagram, a multifunctional table and the like of the switch cabinet.
3. And a data management module:
the data management module is connected with the software subsystem, and performs programming language operation through the software subsystem to receive and store the switch cabinet information acquired by the subsystem; the data management module can also store the operation state information of the switch cabinet and the comprehensive state evaluation data obtained after the software subsystem is judged by the program;
the data management module comprises a MySQL database and a database management tool; wherein: the MySQL database is used for storing the received data; the database management tool is used for creating a related table to manage information data in the MySQL database; the database management tool is Navicat Premium software; the data management module transmits data to the MySQL database through the wired communication sub-module and the wireless communication sub-module; the wired communication sub-module is suitable for field data reading and expanding equipment compatibility of the one-to-many signal buses and the signal auxiliary lines; the wireless communication sub-module is used for real-time monitoring and background communication of the handheld terminal, and real-time monitoring and online state assessment of the running state of the target switch cabinet are realized;
the database management tool Navicat Premium software can provide an intuitive interface, and is convenient for creating modification data; the method has a simple SQL sentence editing function, and is convenient for checking a certain piece of data and historical data of equipment in a database; the method has the advantages of advanced report creation tools, strong user management and the like; compared with other database management tools such as phpMyAdmin, the method has the advantages of SQL grammar highlighting, high efficiency and the like.
4. And an alarm module:
the embodiment of the invention also comprises an alarm module, wherein the alarm module comprises a buzzer; when the software subsystem analyzes and judges that the switch cabinet has insulation faults and abnormal temperature according to the detection data, the software subsystem is started through the program control alarm module, alarms through the buzzer, and reminds workers of the faults of the switch cabinet. Meanwhile, the front-end page management unit also receives alarm information of the switch cabinets obtained from the MySQL database, and a worker can directly check which switch cabinet gives an alarm through the front-end page management system and process the alarm in time.
The embodiment of the invention provides an on-line monitoring system for the running state of a medium-high voltage switch cabinet, wherein a subsystem monitors the partial discharge signal and the in-out line temperature of the switch cabinet in real time, and the partial discharge signal and the temperature signal of the switch cabinet are analyzed in real time through a software subsystem to judge whether the switch cabinet is abnormal or not and give out an evaluation score of the comprehensive state. If the switch cabinet is abnormal, the software subsystem displays alarm information on the front-end page management unit interface, the alarm module is started, and a worker can intuitively see which switch cabinet of which room under which platform is in fault and overhaul in time. Meanwhile, workers can check the real-time running state information of all the switch cabinets through the platform at any time. Compared with the traditional monitoring means, the invention reflects the running state of the switch cabinet in real time, greatly improves the efficiency of solving the fault of the switch cabinet and improves the running reliability of the power system.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (9)
1. An on-line monitoring system for the running state of a medium-high voltage switch cabinet, which is characterized by comprising: the system comprises a measurement subsystem, a software subsystem, a data management module and a power module; wherein:
the measuring subsystem is used for monitoring the information of the switch cabinet and sending the information of the switch cabinet to the data management module through the software subsystem;
the software subsystem is used for creating related Qt items through the Qt Creator unit for programming; the related Qt items acquire the switch cabinet information from the data management module, and after program judgment and program storage operation are carried out on the switch cabinet data, the judged switch cabinet running state information is sent to the data management module;
the data management module is used for storing the received switch cabinet information and switch cabinet operation state information;
the power supply module adopts 220V alternating current power supply and is used for supplying power to each monitoring device in the switch cabinet.
2. The on-line monitoring system for the operation state of a medium-high voltage switch cabinet according to claim 1, wherein the program judging operation comprises program judging of switch cabinet temperature data and partial discharge data in the received switch cabinet information, and if the switch cabinet fails, obtaining alarm time, alarm state level, alarm type and defect type id.
3. The on-line monitoring system for the operation state of a medium-high voltage switch cabinet according to claim 2, wherein the program storage operation comprises the storage of data obtained by judging the program.
4. The on-line monitoring system for the operation state of a medium-high voltage switch cabinet according to claim 1, further comprising an alarm module; the alarm module comprises a buzzer;
and the buzzer is used for alarming according to the running state information of the target switch cabinet.
5. An on-line monitoring system for the operation status of a medium and high voltage switchgear as claimed in claim 1, wherein said measuring subsystem comprises: an ultrasonic sensor, a transient ground voltage sensor and an infrared temperature sensor;
the ultrasonic sensor and the transient state ground voltage sensor are used for monitoring partial discharge signals of the switch cabinet;
the infrared temperature measuring sensor is used for monitoring the temperature of the inlet and outlet wires of the switch cabinet.
6. The on-line monitoring system for the operation state of a medium-high voltage switch cabinet according to claim 1, wherein the software subsystem further comprises a front-end page management unit;
the front-end page management unit acquires the switch cabinet information and the switch cabinet running state information in the data management module through a program language and is also used for acquiring alarm information.
7. The on-line monitoring system for the operation state of a medium-high voltage switch cabinet according to claim 1, wherein the data management module comprises: mySQL database and database management tool;
the MySQL database is used for storing the received switch cabinet information and the switch cabinet running state information;
the database management tool is used for creating a correlation table to manage information data in the MySQL database.
8. The on-line monitoring system for operating states of medium and high voltage switch cabinets according to claim 7, wherein the database management tool is Navicat Premium software.
9. The on-line monitoring system for the operation state of the medium-high voltage switch cabinet according to claim 7, wherein the data transmission is carried out to the MySQL database through a wired communication sub-module and a wireless communication sub-module;
the wired communication sub-module is suitable for field data reading and expanding equipment compatibility of the one-to-many signal buses and the signal auxiliary lines;
the wireless communication sub-module is used for real-time monitoring and background communication of the handheld terminal, and real-time monitoring and online state assessment of the running state of the target switch cabinet are realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211623273.2A CN116106695A (en) | 2022-12-16 | 2022-12-16 | On-line monitoring system for running state of medium-high voltage switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211623273.2A CN116106695A (en) | 2022-12-16 | 2022-12-16 | On-line monitoring system for running state of medium-high voltage switch cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116106695A true CN116106695A (en) | 2023-05-12 |
Family
ID=86262171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211623273.2A Pending CN116106695A (en) | 2022-12-16 | 2022-12-16 | On-line monitoring system for running state of medium-high voltage switch cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116106695A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118501585A (en) * | 2024-05-28 | 2024-08-16 | 保定市润恒星源电气设备有限公司 | Online monitoring method and system for high-voltage switch cabinet |
-
2022
- 2022-12-16 CN CN202211623273.2A patent/CN116106695A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118501585A (en) * | 2024-05-28 | 2024-08-16 | 保定市润恒星源电气设备有限公司 | Online monitoring method and system for high-voltage switch cabinet |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102426328B (en) | Capacitive equipment insulation state real-time on-line monitoring method | |
| CN109193446A (en) | Full perception detection and the inspection operational system of Distribution Network Equipment | |
| CN102393929B (en) | State overhauling control method of distribution network equipment state assessment system | |
| CN110057443B (en) | A transformer online monitoring device and method based on transient acceleration characteristics | |
| CN108333547A (en) | A kind of distribution line failure indicator automatic checkout system and method | |
| CN111722124A (en) | A kind of battery online state monitoring system and monitoring method | |
| CN110530625A (en) | A kind of high voltage isolator mechanical fault diagnosis device and method | |
| CN106228472A (en) | A kind of substation equipment intelligent patrol detection failure analysis methods | |
| CN117375246B (en) | Power equipment management method, system and equipment | |
| CN111308386A (en) | A leakage detection system and detection method | |
| CN116106695A (en) | On-line monitoring system for running state of medium-high voltage switch cabinet | |
| CN105842575A (en) | Status monitoring data mining and hidden danger identification method and apparatus for transmission and transformation equipment | |
| CN114114132B (en) | A method and system for monitoring abnormality of connection terminals of an electric energy metering device | |
| CN104422891A (en) | Offline detection platform for battery assembly | |
| CN107328994A (en) | Insulation Resistance of Transformer experimental rig and method | |
| CN112180268A (en) | Rapid detection method for retired power battery | |
| CN116760191A (en) | Power load debugging method and device | |
| CN114049697B (en) | Inspection auxiliary system | |
| CN116953438A (en) | Automatic insulation voltage withstanding test system and test method thereof | |
| CN211123161U (en) | A circuit breaker circuit current monitoring device | |
| CN107834311A (en) | Network interface plug-in and pull-off device, network interface insert-pull detection system and method | |
| CN223155206U (en) | Railway locomotive auxiliary circuit grounding detection device | |
| CN111781501A (en) | Management device and method for whole set starting test of generator | |
| CN216248155U (en) | A monitoring device for voltage transformers | |
| CN110931898A (en) | Power storage battery detection method |
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 |