CN112345931A - Modular intelligent testing device for medium-voltage switch of nuclear power station - Google Patents
Modular intelligent testing device for medium-voltage switch of nuclear power station Download PDFInfo
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- CN112345931A CN112345931A CN202011196543.7A CN202011196543A CN112345931A CN 112345931 A CN112345931 A CN 112345931A CN 202011196543 A CN202011196543 A CN 202011196543A CN 112345931 A CN112345931 A CN 112345931A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3272—Apparatus, systems or circuits therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3272—Apparatus, systems or circuits therefor
- G01R31/3274—Details related to measuring, e.g. sensing, displaying or computing; Measuring of variables related to the contact pieces, e.g. wear, position or resistance
Abstract
The invention discloses a modular intelligent testing device for a medium-voltage switch of a nuclear power station, wherein a microcomputer module, an interface control module, a switch mechanical characteristic tester and an insulation resistance testing module in the device are mutually independent on a physical structure, and are quickly assembled through interfaces arranged on the modules to realize the combined function of the modules; the operation test of the electric switch of the maintenance program can be automatically completed, all operation test steps of the switch can be fully automatically completed, paperless tests are realized, complicated operation procedures such as wire dismantling and manual measurement are omitted, relevant data of the testing device are uploaded to cloud management, and the intelligent degree is high.
Description
Technical Field
The invention relates to the technical field of detection of medium-voltage switches of nuclear power stations, in particular to a modular intelligent testing device for the medium-voltage switches of the nuclear power stations.
Background
Nuclear power is a low-carbon environment-friendly clean energy source. The nuclear power does not generate air pollutants such as sulfur dioxide, nitrogen oxide, smoke dust and the like in the power generation process, the emission of the carbon dioxide is far lower than that of thermal power, and the nuclear power becomes one of important energy used by people. The stable operation of the medium-voltage switch of the nuclear power station ensures the safe operation of key equipment of the nuclear power station to a certain extent, thereby ensuring the nuclear safety. However, the conventional testing method for the medium-voltage switch of the nuclear power station has the following defects: firstly, medium voltage switches aimed at by the current nuclear power station are mainly a medium voltage circuit breaker and a medium voltage contactor, the detection means of the medium voltage circuit breaker and the medium voltage contactor adopts meters to measure relevant characteristics one by one, each content after testing needs to manually record a test result, and the next test item needs to be reconnected. Although some testing devices can realize the centralized test of a plurality of medium voltage switch testing items, the testing devices are large in size and inconvenient to transport, and when the testing devices need to be tested in some narrow spaces in a nuclear power station, the problem that the testing devices cannot enter is sometimes encountered, so that the application environment of the testing devices is restricted to a certain extent.
The above problems are urgently needed to be solved.
Disclosure of Invention
The object of the present invention is to solve the problems mentioned in the background section above by means of a modular intelligent testing device for medium voltage switches in nuclear power plants.
In order to achieve the purpose, the invention adopts the following technical scheme:
the embodiment of the invention provides a modularized intelligent testing device for a medium-voltage switch of a nuclear power station, which comprises a microcomputer module, an interface control module, a switch mechanical characteristic tester and an insulation resistance testing module, wherein the microcomputer module is used for controlling the interface control module; the microcomputer module, the interface control module, the switch mechanical characteristic tester and the insulation resistance test module are mutually independent on a physical structure, and the interface control module is provided with an interface for connecting the microcomputer module, the switch mechanical characteristic tester, the insulation resistance test module and a tested medium-voltage loop; interfaces for connecting the microcomputer module and the interface control module are correspondingly arranged on the switch mechanical characteristic tester and the insulation resistance test module; when the testing device works, a microcomputer module, an interface control module, a switch mechanical characteristic tester and an insulation resistance testing module are respectively conveyed to the position of a medium-voltage switch of a nuclear power station to be tested, the microcomputer module, the interface control module, the switch mechanical characteristic tester and the insulation resistance testing module are connected by adopting corresponding specification wire harnesses, a medium-voltage switch testing project is selected through the microcomputer module, the microcomputer module outputs a corresponding instruction to the interface control module, the interface control module switches the switch mechanical characteristic tester or the insulation resistance testing module corresponding to the selected medium-voltage switch testing project according to the received instruction, and the switch mechanical characteristic tester or the insulation resistance testing module transmits and stores testing data to the microcomputer module.
Particularly, after the microcomputer module, the interface control module, the switch mechanical characteristic tester and the insulation resistance test module are respectively conveyed to the positions where the medium voltage switches of the nuclear power station to be tested are located, the switch mechanical characteristic tester is placed on the insulation resistance test module, the interface control module is placed on the switch mechanical characteristic tester, and the microcomputer module is placed on the interface control module.
Particularly, the same 485 communication ports are arranged on the microcomputer module, the interface control module, the switch mechanical characteristic tester and the insulation resistance test module, so that 485 communication is realized.
Particularly, the insulation resistance tester is used for realizing insulation test of a medium-voltage interval main loop and a medium-voltage interval secondary loop.
In particular, the switch mechanical characteristic tester is used for testing the switch characteristic and the direct current resistance, and meanwhile integrates a voltage source and a current source.
In particular, the interface control module comprises but is not limited to a Programmable Logic Controller (PLC) interface circuit and a test connector adapted with a switch mechanical characteristic tester and an insulation resistance tester; the programmable logic controller interface circuit is connected with the test connector.
In particular, the corresponding medium voltage switch test items are selected through a display screen on the microcomputer module, an independent comprehensive test report is generated at each medium voltage interval, and the completed test contents include but are not limited to: firstly, testing contact resistance of a power loop; secondly, testing interphase and ground insulation resistance of the power circuit; thirdly, detecting the opening and closing state of the auxiliary contact of the switch control circuit and measuring the conduction direct resistance; fourthly, the switch control loop simulates external short circuit; fifthly, performing synchronous switching-on and switching-off tests on the main circuit; sixthly, checking the voltage fixed value and the delay time; seventhly, checking the fixed value and the delay time of the three-phase overcurrent and zero-sequence overcurrent; eighthly, checking the delay time of the delay relay; ninthly, checking an overload protection curve; tenthly, verifying the excitation starting and shunt excitation voltage of the relay coil; the microcomputer module is also used for analyzing relevant detection data and storing, importing and exporting the detection data.
Particularly, the modularized intelligent testing device for the nuclear power station medium-voltage switch is also in communication connection with an intelligent testing cloud platform of the nuclear power station medium-voltage switch, and the microcomputer module sends relevant testing data to a cloud end for management.
Particularly, the intelligent test cloud platform for the medium-voltage switch of the nuclear power station comprises a project management module, a maintenance personnel management module, an early warning module and a report module; the project management module is used for automatically generating the contents of the overhaul and medium voltage switch tests according to the relevant regulations of daily overhaul management and pushing the contents to relevant departments or overhaul testers in a table form; after the overhaul tester completes the relevant content, the test result is confirmed through the mobile phone or the PC end; the maintenance personnel management module is used for personnel authority division, approval process and task confirmation; the early warning module is used for establishing a mathematical model according to, but not limited to, historical data, delivery date and service life related data measured by the medium-voltage switch and giving early warning to a key electrical switch; the report module is used for forming a report for the medium-voltage switch test result and selecting whether to send the report to the cloud, and the report can give a judgment whether the test result is qualified.
Compared with the prior art, the modular intelligent testing device for the medium-voltage switch of the nuclear power station provided by the embodiment of the invention has the following advantages: the testing device comprises a microcomputer module, an interface control module, a switch mechanical characteristic tester and an insulation resistance testing module, wherein the microcomputer module, the interface control module, the switch mechanical characteristic tester and the insulation resistance testing module are mutually independent in physical structure, can be quickly assembled through interfaces arranged on the modules to realize the combined function of the modules, and can also be used independently to realize the corresponding function of the modules; secondly, the operation test risk can be reduced, and the test efficiency is improved; the operation test of the electric switch capable of automatically completing the maintenance procedure can complete all the operation test steps of the switch in a full-automatic mode, paperless tests are achieved, and complex operation procedures such as wire dismantling and manual measurement are omitted. According to the invention, the interface circuit of the digital programming and automatic switching loop is formed according to the test content, the test of the medium-voltage switch can be completed by means of a standardized computer program and various measuring instruments in the overhaul test, and the test efficiency and accuracy are improved. In addition, the related data of the testing device can be uploaded to a cloud end, and an intelligent testing cloud platform for the medium-voltage switch of the nuclear power station is established, and has a project management function, a maintenance personnel management function, an early warning function and a report function, and the intelligent degree is high.
Drawings
Fig. 1 is a front view of a modular intelligent testing device for a medium-voltage switch in a nuclear power plant according to an embodiment of the present invention;
fig. 2 is a schematic perspective view of a modular intelligent testing apparatus for a medium voltage switch in a nuclear power plant according to an embodiment of the present invention.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 and 2, the modular intelligent testing apparatus for a medium voltage switch in a nuclear power plant in the present embodiment includes a microcomputer module 101, an interface control module 102, a switch mechanical characteristic tester 103, and an insulation resistance testing module 104. The microcomputer module 101, the interface control module 102, the switch mechanical characteristic tester 103 and the insulation resistance test module 104 are physically independent from each other, and the interface control module 102 is provided with an interface for connecting the microcomputer module 101, the switch mechanical characteristic tester 103, the insulation resistance test module 104 and a medium-voltage loop to be tested; the switch mechanical characteristic tester 103 and the insulation resistance test module 104 are correspondingly provided with interfaces for connecting the microcomputer module 101 and the interface control module 102, and the interface control module 102 and the insulation resistance test module 104 are also provided with an aviation plug 1021 and an aviation plug 1041 for connecting a tested loop or a tested part. When the testing device works, the microcomputer module 101, the interface control module 102, the switch mechanical characteristic tester 103 and the insulation resistance testing module 104 are respectively transported to the positions of medium-voltage switches of a nuclear power station to be tested, corresponding specification wire harnesses are adopted to connect the microcomputer module 101, the interface control module 102, the switch mechanical characteristic tester 103 and the insulation resistance testing module 104, medium-voltage switch testing items are selected through the microcomputer module 101, the microcomputer module 101 outputs corresponding instructions to the interface control module 102, the interface control module 102 switches the switch mechanical characteristic tester 103 or the insulation resistance testing module 104 corresponding to the selected medium-voltage switch testing items according to the received instructions, and the switch mechanical characteristic tester 103 or the insulation resistance testing module 104 transmits and stores testing data to the microcomputer module 101.
Specifically, in this embodiment, after the microcomputer module 101, the interface control module 102, the switch mechanical characteristic tester 103, and the insulation resistance test module 104 are respectively transported to the positions where the medium voltage switches of the nuclear power plant to be tested are located, the switch mechanical characteristic tester 103 is placed on the insulation resistance test module 104, the interface control module 102 is placed on the switch mechanical characteristic tester 103, and the microcomputer module 101 is placed on the interface control module 102. It should be noted that, in the application, the arrangement sequence of the microcomputer module 101, the interface control module 102, the switch mechanical characteristic tester 103, and the insulation resistance test module 104 is not limited to the mode shown in the figure, and can be flexibly adjusted as required.
Specifically, in this embodiment, the same 485 communication ports are disposed on the microcomputer module 101, the interface control module 102, the switch mechanical characteristic tester 103, and the insulation resistance test module 104, so as to implement 485 communication. Specifically, in this embodiment, the insulation resistance tester is used to implement insulation test on the medium-voltage interval primary loop and the secondary loop. The switch mechanical characteristic tester 103 is used for testing the switch characteristic and the direct current resistance, and simultaneously integrating a voltage source and a current source.
Specifically, in this embodiment, the test system software in the computer establishes communication with various modules through the MODBUS protocol, and the functional modules and interfaces of the software include an insulation characteristic test function and interface and a switch characteristic test function and interface. Selecting a corresponding medium voltage switch test item through a computer, generating an independent comprehensive test report form at each medium voltage interval, wherein the completed test contents include but are not limited to: firstly, testing contact resistance of a power loop; secondly, testing interphase and ground insulation resistance of the power circuit; thirdly, detecting the opening and closing state of the auxiliary contact of the switch control circuit and measuring the conduction direct resistance; fourthly, the switch control loop simulates external short circuit; fifthly, performing synchronous switching-on and switching-off tests on the main circuit; sixthly, checking the voltage fixed value and the delay time; seventhly, checking the fixed value and the delay time of the three-phase overcurrent and zero-sequence overcurrent; eighthly, checking the delay time of the delay relay; ninthly, checking an overload protection curve; tenthly, verifying the excitation starting and shunt excitation voltage of the relay coil; wherein, the computer is also used for analyzing the related detection data and storing, importing and exporting the detection data.
Specifically, in the present embodiment, the interface control module 102 includes, but is not limited to, a Programmable Logic Controller (PLC) interface circuit and a test connector adapted to the switch mechanical characteristic tester 103 and the insulation resistance tester; the programmable logic controller interface circuit is connected with the test connector. The interface circuit of the programmable logic controller and the test connector realize the mutual matching between the medium-voltage loop and the instrument, and the interface circuit of the programmable logic controller and the test connector realize the function of automatically switching the test loop by the communication of a computer, the switch mechanical characteristic tester 103, the insulation resistance tester and the PLC and by using test software with different functions, realize the interface with the secondary loop and the main contact of the circuit breaker and receive control instructions. The programmable logic controller interface circuit is in real-time communication with the computer.
Specifically, in this embodiment, the integrated intelligent testing device for the medium voltage switch of the nuclear power station is further in communication connection with the intelligent testing cloud platform for the medium voltage switch of the nuclear power station, and the computer sends the relevant testing data to the cloud for management. Specifically, in this embodiment, the intelligent test cloud platform for the medium-voltage switch of the nuclear power station includes a project management module, a maintenance personnel management module, an early warning module and a report module; the project management module is used for automatically generating the contents of the overhaul and medium voltage switch tests according to the relevant regulations of daily overhaul management and pushing the contents to relevant departments or overhaul testers in a table form; after the overhaul tester completes the relevant content, the test result is confirmed through the mobile phone or the PC end; the maintenance personnel management module is used for personnel authority division, approval process and task confirmation; the early warning module is used for establishing a mathematical model according to, but not limited to, historical data, delivery date and service life related data measured by the medium-voltage switch and giving early warning to a key electrical switch; the report module is used for forming a report for the medium-voltage switch test result and selecting whether to send the report to the cloud, and the report can give a judgment whether the test result is qualified.
According to the technical scheme provided by the embodiment of the invention, the microcomputer module 101, the interface control module 102, the switch mechanical characteristic tester 103 and the insulation resistance testing module 104 are mutually independent in physical structure, can be rapidly assembled through interfaces arranged on the modules to realize the combination function of the modules, and can also be independently used to realize the corresponding function of the modules. The technical scheme provided by the embodiment of the invention can reduce the operation test risk and improve the test efficiency; the operation test of the electric switch capable of automatically completing the maintenance procedure can complete all the operation test steps of the switch in a full-automatic mode, paperless tests are achieved, and complex operation procedures such as wire dismantling and manual measurement are omitted. According to the invention, the interface circuit of the digital programming and automatic switching loop is formed according to the test content, the test of the medium-voltage switch can be completed by means of a standardized computer program and various measuring instruments in the overhaul test, and the test efficiency and accuracy are improved. In addition, the related data of the testing device can be uploaded to a cloud end, and an intelligent testing cloud platform for the medium-voltage switch of the nuclear power station is established, and has a project management function, a maintenance personnel management function, an early warning function and a report function, and the intelligent degree is high.
It will be understood by those skilled in the art that all or part of the above embodiments may be implemented by hardware related to instructions of a program in a microcomputer module, where the program may be stored in a storage medium readable by the microcomputer module, and when executed, may include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (9)
1. A modularized intelligent testing device for a medium-voltage switch of a nuclear power station is characterized by comprising a microcomputer module, an interface control module, a switch mechanical characteristic tester and an insulation resistance testing module; the microcomputer module, the interface control module, the switch mechanical characteristic tester and the insulation resistance test module are mutually independent on a physical structure, and the interface control module is provided with an interface for connecting the microcomputer module, the switch mechanical characteristic tester, the insulation resistance test module and a tested medium-voltage loop; interfaces for connecting the microcomputer module and the interface control module are correspondingly arranged on the switch mechanical characteristic tester and the insulation resistance test module; when the testing device works, a microcomputer module, an interface control module, a switch mechanical characteristic tester and an insulation resistance testing module are respectively conveyed to the position of a medium-voltage switch of a nuclear power station to be tested, the microcomputer module, the interface control module, the switch mechanical characteristic tester and the insulation resistance testing module are connected by adopting corresponding specification wire harnesses, a medium-voltage switch testing project is selected through the microcomputer module, the microcomputer module outputs a corresponding instruction to the interface control module, the interface control module switches the switch mechanical characteristic tester or the insulation resistance testing module corresponding to the selected medium-voltage switch testing project according to the received instruction, and the switch mechanical characteristic tester or the insulation resistance testing module transmits and stores testing data to the microcomputer module.
2. The device as claimed in claim 1, wherein after the microcomputer module, the interface control module, the switch mechanical characteristic tester and the insulation resistance test module are respectively transported to the location of the medium voltage switch in the nuclear power plant to be tested, the switch mechanical characteristic tester is placed on the insulation resistance test module, the interface control module is placed on the switch mechanical characteristic tester, and the microcomputer module is placed on the interface control module.
3. The modular intelligent testing device for the medium-voltage switch of the nuclear power station as claimed in claim 1, wherein the microcomputer module, the interface control module, the switch mechanical characteristic tester and the insulation resistance testing module are all provided with the same 485 communication ports to realize 485 communication.
4. The modular intelligent test device for the medium voltage switch of the nuclear power plant as recited in claim 1, wherein the insulation resistance tester is used for realizing insulation test of the medium voltage interval primary loop and the secondary loop.
5. The modular intelligent test apparatus for the medium voltage switch in nuclear power plant as claimed in claim 1, wherein the switch mechanical characteristic tester is used for testing the switch characteristic and the direct current resistance, and integrating the voltage source and the current source.
6. The modular intelligent test device for the medium voltage switch of the nuclear power plant as claimed in claim 1, wherein the interface control module includes but is not limited to a programmable logic controller interface circuit and a test connector adapted to a switch mechanical characteristic tester and an insulation resistance tester; the programmable logic controller interface circuit is connected with the test connector.
7. The modular intelligent test device for the medium voltage switch in the nuclear power station as claimed in one of claims 1 to 6, wherein the corresponding medium voltage switch test item is selected through a display screen on the microcomputer module, an independent comprehensive test report is generated at each medium voltage interval, and the completed test contents include but are not limited to: firstly, testing contact resistance of a power loop; secondly, testing interphase and ground insulation resistance of the power circuit; thirdly, detecting the opening and closing state of the auxiliary contact of the switch control circuit and measuring the conduction direct resistance; fourthly, the switch control loop simulates external short circuit; fifthly, performing synchronous switching-on and switching-off tests on the main circuit; sixthly, checking the voltage fixed value and the delay time; seventhly, checking the fixed value and the delay time of the three-phase overcurrent and zero-sequence overcurrent; eighthly, checking the delay time of the delay relay; ninthly, checking an overload protection curve; tenthly, verifying the excitation starting and shunt excitation voltage of the relay coil; the microcomputer module is also used for analyzing relevant detection data and storing, importing and exporting the detection data.
8. The device for the modular intelligent test of the medium voltage switch in the nuclear power plant as claimed in claim 7, wherein the device is further connected with an intelligent test cloud platform of the medium voltage switch in the nuclear power plant in a communication mode, and the microcomputer module sends test related data to a cloud end for management.
9. The modular intelligent testing device for the medium voltage switch of the nuclear power plant as recited in claim 8, wherein the intelligent testing cloud platform for the medium voltage switch of the nuclear power plant comprises a project management module, a maintenance personnel management module, an early warning module and a report module; the project management module is used for automatically generating the contents of the overhaul and medium voltage switch tests according to the relevant regulations of daily overhaul management and pushing the contents to relevant departments or overhaul testers in a table form; after the overhaul tester completes the relevant content, the test result is confirmed through the mobile phone or the PC end; the maintenance personnel management module is used for personnel authority division, approval process and task confirmation; the early warning module is used for establishing a mathematical model according to, but not limited to, historical data, delivery date and service life related data measured by the medium-voltage switch and giving early warning to a key electrical switch; the report module is used for forming a report for the medium-voltage switch test result and selecting whether to send the report to the cloud, and the report can give a judgment whether the test result is qualified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011196543.7A CN112345931A (en) | 2020-10-30 | 2020-10-30 | Modular intelligent testing device for medium-voltage switch of nuclear power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011196543.7A CN112345931A (en) | 2020-10-30 | 2020-10-30 | Modular intelligent testing device for medium-voltage switch of nuclear power station |
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| Publication Number | Publication Date |
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| CN112345931A true CN112345931A (en) | 2021-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011196543.7A Withdrawn CN112345931A (en) | 2020-10-30 | 2020-10-30 | Modular intelligent testing device for medium-voltage switch of nuclear power station |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114184948A (en) * | 2021-12-08 | 2022-03-15 | 无锡中科电气设备有限公司 | Testing device for medium-voltage switch |
| CN114325373A (en) * | 2021-12-30 | 2022-04-12 | 江苏省如高高压电器有限公司 | High-voltage circuit breaker product line integrated test method |
-
2020
- 2020-10-30 CN CN202011196543.7A patent/CN112345931A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114184948A (en) * | 2021-12-08 | 2022-03-15 | 无锡中科电气设备有限公司 | Testing device for medium-voltage switch |
| CN114325373A (en) * | 2021-12-30 | 2022-04-12 | 江苏省如高高压电器有限公司 | High-voltage circuit breaker product line integrated test method |
| WO2023124140A1 (en) * | 2021-12-30 | 2023-07-06 | 江苏省如高高压电器有限公司 | High-voltage circuit breaker product line integration test method |
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