CN117410130A - Control method of vacuum circuit breaker of mine electrical equipment - Google Patents
Control method of vacuum circuit breaker of mine electrical equipment Download PDFInfo
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- CN117410130A CN117410130A CN202311458102.3A CN202311458102A CN117410130A CN 117410130 A CN117410130 A CN 117410130A CN 202311458102 A CN202311458102 A CN 202311458102A CN 117410130 A CN117410130 A CN 117410130A
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- 238000004891 communication Methods 0.000 claims abstract description 25
- 230000005540 biological transmission Effects 0.000 claims abstract description 20
- 238000012360 testing method Methods 0.000 claims abstract description 10
- 238000005065 mining Methods 0.000 claims description 9
- 230000002159 abnormal effect Effects 0.000 claims description 4
- 238000013507 mapping Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000012956 testing procedure Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000009466 transformation Effects 0.000 abstract description 2
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- 230000003993 interaction Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
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- 238000012545 processing Methods 0.000 description 2
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- 208000025274 Lightning injury Diseases 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
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Abstract
The invention relates to the technical field of mine power transformation, in particular to a control method of a vacuum circuit breaker of mine electrical equipment, which comprises the following steps of: the first step, designing a control loop of the vacuum circuit breaker to be controlled by a PLC system; secondly, controlling the PLC system by using wireless transmission equipment; thirdly, selecting a hardware mounting connection mode of the wireless communication equipment and the PLC system; fourthly, carrying out communication configuration through PLC software; and fifthly, testing wireless communication data. By adopting the method, the remote vacuum circuit breaker of the substation in the production factory can remotely control the on-off of the vacuum circuit breaker by additionally arranging the PLC and the wireless communication module. And after tripping of the remote substation vacuum circuit breaker in the production factory, remotely confirming whether the field environment is safe or not through a wireless camera. The original manually controlled vacuum circuit breaker electrical equipment is designed to have a remote on-off function.
Description
Technical Field
The invention relates to the technical field of mine power transformation, in particular to a control method of a vacuum circuit breaker of mine electrical equipment.
Background
A vacuum circuit breaker is an electrical switching apparatus for interrupting a current at an electrical circuit to ensure safety and stability of an electrical system. In the field of mines and mining, vacuum interrupters are commonly used to control and protect electrical equipment, such as large scale equipment such as ball mills, tower mills, thickeners, and the like, in power substations and workshops. Are generally distributed in various substations to prevent safety problems such as electrical faults and fires. A main feature of vacuum circuit breakers is that they use vacuum as the extinguishing medium for the arc, so that no gas release or pollution occurs when the current is interrupted, which makes them particularly useful in severe environments, such as mines and mining sites. Vacuum interrupters are commonly used in high or medium voltage electrical systems to ensure reliable operation and personnel safety of electrical equipment. When lightning strike event occurs in a workshop, large equipment fails, and the frequency converter causes slope fluctuation, fault current can be cut off, fault reasons are reported, and power grid equipment is protected from impact. Vacuum interrupters for mines are often required to meet special environmental and operational requirements to accommodate the harsh conditions within the mine. These devices typically require periodic maintenance and inspection to ensure their performance and safety.
At present, a control circuit is generally used when the vacuum short-circuiting device is started, and the control system sends signals to the electromagnetic coil so as to strengthen or weaken the magnetic field of the circuit breaker and control the on-off of the circuit. These operations are currently only performed by high voltage operators on site, so that the high voltage operators required for the substation manually control the vacuum circuit breaker to switch on and off, thereby controlling the electrical equipment. However, the position of the power substation is far away, the time for an operator to reach the power substation is long, the emergency accident handling time is long, and when the lightning trip and cutting-off faults of the vacuum circuit breaker occur, the power transmission can not be processed in time to restore production.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a control method of a vacuum circuit breaker of mine electrical equipment, which solves the problem that the operation of the vacuum circuit breaker in the prior art can only be carried out by high-voltage operation electrician to switch on or off on site; the high-voltage operator needed by the substation manually controls the vacuum circuit breaker to be closed so as to control the electrical equipment, but the substation is far away, the time for the operator to reach the substation is long, and the emergency accident treatment time is long; when the vacuum circuit breaker is tripped by lightning stroke and breaks down, the problems of power transmission recovery production and the like cannot be solved in time.
In order to solve the technical problems, the invention provides the following core technical scheme: the control method of the vacuum circuit breaker of the mine electrical equipment comprises the step of controlling the vacuum circuit breaker by using a PLC system, and is characterized by further comprising the following steps: the first step, designing a control loop of the vacuum circuit breaker to be controlled by a PLC system; secondly, controlling the PLC system by using wireless transmission equipment; thirdly, selecting a hardware mounting connection mode of the wireless communication equipment and the PLC system; fourthly, carrying out communication configuration through PLC software; and fifthly, testing wireless communication data.
By adopting the method, the remote vacuum circuit breaker of the substation in the production factory can remotely control the on-off of the vacuum circuit breaker by additionally arranging the PLC and the wireless communication module. After the vacuum circuit breaker of the remote substation in the production factory trips, whether the field environment is safe or not is remotely confirmed by additionally installing a 5G wireless camera. The original manually controlled vacuum circuit breaker electrical equipment is designed to have a remote on-off function.
Further, based on the above core technical solution, the control loop of the first-step vacuum circuit breaker is designed, and the specific steps of the design include: step 1, adding a change-over switch SA control to the PLC system for distinguishing local control or remote control; step 2, adding remote start points and stop points to the PLC system, when the change-over switch SA is switched to remote control, switching on is controlled by the start points, switching off is controlled by the stop points, and compared with single-point control, a double-point start-stop control mode is more stable and reliable; step 3, connecting the input end of the PLC system with a public port: the input power port of the PLC system is AC220V, so as to provide an operation power supply for the PLC; the output power port of the PLC system is DC24V, and is the power output of the PLC; in the use process of the PLC, the correct wiring of the input end and the output end is very important, and the wiring is the premise of the operation of the PLC. The connection of the control line of the PLC system is connected with one end of the control line of the PLC system, and the other end of the control line of the PLC system is connected with a public port (COM end) of the PLC system; step 4, setting an input/output module indicator lamp in the PLC system, checking whether the input/output module indicator lamp is lightened or not simultaneously after the input end and the public port are provided with signals, checking whether the input/output module indicator lamp is lightened or not, and checking whether the input/output module indicator lamp is lightened or not simultaneously after the sensor is provided with signals or a driving device of an actuating mechanism is electrified; after the input and output signals are measured, the measured addresses are recorded at the same time, so that the signal addresses and the consistent PLC output port (DO) wiring in the point table can generally output signals by using a relay, and the correctness of the on-site signal feedback line is confirmed; step 5, programming a start-stop control program: a PLC system is used for programming a start-stop control program and an alarm signal acquisition program; performing hardware configuration before programming, and establishing hardware configuration and corresponding communication configuration according to the type of an actual PLC; after the hardware configuration is completed, the input/output address recorded on the paper before is written in the symbol table of the software, and the flow chart of the program is written in the draft before programming. The starting and stopping control program and the alarm signal acquisition program comprise a main program, a stopping program, an emergency stopping program, a resetting program and the like; the formulated flow is ensured to be correct, and equipment damage caused by programming problems is avoided. Step 6, testing procedure: the debugging program can be tested by using the simulation function of the software, but a plurality of complicated programs are difficult to simulate by the software to see whether the program is correct or not; downloading a start-stop control program to a CPU (Central processing Unit) of a PLC (programmable logic controller) system for online debugging, if equipment is motionless or abnormal conditions occur in running, firstly, not modifying the program, and possibly, not debugging a sensor in place, and modifying the start-stop control program after checking and ensuring that the sensor of the PLC system is error-free; finally, the program is stored in multiple parts.
Further, based on the core technical scheme, in the second step, the wireless transmission device is a 5G wireless transmission device.
Furthermore, based on the core technical scheme, in the third step, the hardware mounting connection mode is that a wireless signal transmitter is connected with an upper computer CPU of the PLC system by using a Profinet protocol.
Further, based on the above core technical solution, in the fourth step, when the communication configuration is performed by the PLC software, the following steps are performed: step 1, creating a new project; step 2, adding an upper computer CPU and configuring parameters; and 3, configuring network configuration, and setting the parameters of the Ethernet interface to match with the intelligent equipment.
Further, setting the ethernet interface parameters, in addition to setting the ethernet address, further includes the following steps: step 1: setting an operation mode, setting a transmission area and updating time; step 2, setting simple input/output correspondence of a main program; step 3, downloading hardware and programs; and 4, testing the system.
Further, based on the above core technical solution, in the fifth step, when testing wireless communication data, the PLC system includes two PLC controllers: a No. 1 PLC controller and a No. 2 PLC controller; the method comprises the following steps: step 1, inputting a signal to an I point of a No. 1 PLC controller, and checking whether an output signal exists at a Q point of a corresponding No. 2 PLC controller; step 2, inputting a signal to the I point of the No. 2 PLC controller, and checking whether an output signal exists at the Q point of the corresponding No. 1 PLC; and in the step 1, the Q point of the corresponding No. 2 PLC controller has an output signal, and in the step 2, the Q point of the corresponding No. 1 PLC has an output signal, so that the wireless communication data interaction between the two PLC controllers is completed.
Further, based on the core technical scheme, the method also comprises a remote monitoring method. The method comprises the following specific steps: step 1: selecting hardware equipment, wherein the hardware equipment comprises a camera with a 5G function, a video server capable of reading cloud video, a 5G wireless router, a camera bracket, a network cable, a hard disk and a display; step 2: the hardware equipment is assembled and connected with the video server, the fixed bracket is installed on the hardware equipment, the operation parameters of the equipment can be monitored, the wireless router is installed to ensure that signals are not blocked, and the video server is assembled; step 3: the method comprises the steps of equipment debugging and server debugging, wherein after the video server is started, configuration and hard disk initialization are carried out according to a setting guide, and the front-end equipment is ensured to be in a wireless signal range by configuring the 5G wireless router; and configuring the IP address and the mapping address of the camera, and setting and connecting the camera in the server. And debugging the camera image, and adding a camera in the server, so that the operation parameters and the environment safety state of the vacuum circuit breaker of the remote substation can be seen through the local display.
According to the control method of the vacuum circuit breaker of the mine electrical equipment, the vacuum circuit breaker is controlled by the PLC system, and further the control of the vacuum circuit breaker can be achieved remotely by combining wireless transmission equipment. Through 5G wireless network and 5G wireless video, can realize looking over the analysis to the substation environment when the lightning trip appears in the remote area substation of concentrating the mill after the first time, confirm that there is not unusual the scene after, after the vacuum circuit breaker parameter is unusual, can carry out the remote switch-on through 5G wireless device control PLC. Compared with the prior condition that personnel are required to confirm on site, the emergency accident handling efficiency is improved. After the switch-on is free of problems, the production equipment can be normally opened, the influence range of accidents is reduced, and the processing time of emergency accidents is greatly shortened.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application:
FIG. 1 is a schematic diagram of a wireless remote control PLC system of the present invention;
fig. 2 is a schematic diagram of the remote control electrical principle of the vacuum circuit breaker of the present invention;
fig. 3 is a schematic diagram of a 5G wireless camera system according to the present invention.
In the figure: 1. a PLC system; 2. a wireless transmission device; 3. a change-over switch SA; 4. starting a point position; 5. stopping the point position; 6. a camera; 7. a video server; 8. a 5G wireless router; 9. a camera support; 10. a net wire; 11. a hard disk; 12. a display.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
as shown in fig. 1, a control method of a vacuum circuit breaker of a mine electrical apparatus includes controlling the vacuum circuit breaker by using a PLC system 1, and is characterized by further including the steps of:
the first step, designing a control loop of a vacuum circuit breaker to be controlled by a PLC system 1;
secondly, controlling the PLC system 1 by using a wireless transmission device 2, wherein the wireless transmission device 2 adopts a 5G wireless transmission device;
thirdly, selecting a hardware mounting connection mode of the wireless communication equipment and the PLC system 1, wherein the hardware mounting connection mode is that the wireless signal transmitter is connected with an upper computer CPU of the PLC system 1 by using a Profinet protocol;
and fourthly, carrying out communication configuration through PLC software, wherein the method comprises the following steps:
step 1, creating a new project;
step 2, adding an upper computer CPU and configuring parameters;
step 3, configuring network configuration, namely setting the parameters of the Ethernet interface to match with the intelligent equipment; setting the Ethernet interface parameters, besides needing to set the Ethernet address, the method comprises the following steps: step (1): setting an operation mode, setting a transmission area and updating time; step (2), setting simple input/output correspondence of a main program; step (3), downloading hardware and programs; and (4) testing the system.
Fifthly, testing wireless communication data, wherein the PLC system 1 comprises two PLC controllers: a No. 1 PLC controller and a No. 2 PLC controller; the test is carried out according to the following steps: step 1, inputting a signal to an I point of a No. 1 PLC controller, and checking whether an output signal exists at a Q point of a corresponding No. 2 PLC controller; step 2, inputting a signal to the I point of the No. 2 PLC controller, and checking whether an output signal exists at the Q point of the corresponding No. 1 PLC; in the step 1, the Q point of the corresponding No. 2 PLC controller has an output signal; and 2, when the Q point of the corresponding No. 1 PLC has an output signal, the wireless communication data interaction between the two PLC controllers is completed.
The embodiment enables the original manually-controlled vacuum circuit breaker electrical equipment to be designed to have a remote on-off function. Remote vacuum circuit breakers of the substation in the production factory are controlled to be opened and closed remotely by adding a PLC controller and a 5G wireless module.
Embodiment two:
as shown in fig. 1, a control method of a vacuum circuit breaker of a mine electrical apparatus includes controlling the vacuum circuit breaker using a PLC system 1, including the steps of:
the first step, designing a control loop of the vacuum circuit breaker to be controlled by the PLC system 1, as shown in fig. 2, includes the specific steps of:
step 1, adding a change-over switch SA3 to the PLC system 1 for distinguishing local control or remote control;
step 2, adding a remote starting point position 4 and a remote stopping point position 5 to the PLC system 1, when the change-over switch SA3 is switched to remote control, switching on is controlled through the starting point position 4, switching off is controlled through the stopping point position 5, and compared with single-point control, a double-point starting-stopping control mode is more stable and reliable;
step 3, connecting the input end of the PLC system 1 with a public port: the input power port of the PLC system 1 is AC220V, so as to provide an operation power supply for the PLC; the output power port of the PLC system 1 is DC24V, and is the power output of the PLC; in the use process of the PLC, the correct wiring of the input end and the output end is very important, and the wiring is the premise of the operation of the PLC. The connection position of a DI signal DO signal terminal is confirmed by the connection of a PLC control line, the connection of a PLC switching value (DI) is carried out, one end of the connection of the control line of the PLC system 1 is connected with the input end of the PLC system 1, and the other end of the connection of the control line of the PLC system 1 is connected with a public port (COM end) of the PLC system 1;
step 4, the PLC system 1 is provided with an input/output module indicator lamp, and after the input end and the public port have signals, the input/output module indicator lamp is checked to be lightened simultaneously, whether the input/output module indicator lamp is lightened or not is checked, and after the sensor has signals or a driving device of an actuating mechanism is powered on, the input/output module indicator lamp on the PLC is required to be lightened simultaneously; after the input and output signals are measured, the measured addresses are recorded at the same time, so that the signal addresses and the consistent PLC output port (DO) wiring in the point table can generally output signals by using a relay, and the correctness of the on-site signal feedback line is confirmed;
step 5, programming a start-stop control program: a PLC system 1 is used for programming a start-stop control program and an alarm signal acquisition program; the first step before programming is to carry out hardware configuration, and establish hardware configuration and corresponding communication configuration according to the type of the actual PLC; after the hardware configuration is completed, the input/output address recorded on the paper before is written in the symbol table of the software, and the flow chart of the program is written in the draft before programming. The starting and stopping control program and the alarm signal acquisition program comprise a main program, a stopping program, an emergency stopping program, a resetting program and the like; the formulated flow is ensured to be correct, and equipment damage caused by programming problems is avoided;
step 6, testing procedure: the debugging program can be tested by using the simulation function of the software, but a plurality of complicated programs are difficult to simulate by the software to see whether the program is correct or not; downloading a start-stop control program to a CPU of the PLC system 1 for online debugging, if the equipment is not moving or abnormal conditions occur in operation, firstly, not modifying the program, and most likely, not debugging the sensor in place, and modifying the start-stop control program after checking and ensuring that the sensor of the PLC system 1 is error-free; finally, the program is stored in multiple parts.
Secondly, controlling the PLC system 1 by using a wireless transmission device 2, wherein the wireless transmission device 2 adopts a 5G wireless transmission device;
thirdly, selecting a hardware mounting connection mode of the wireless communication equipment and the PLC system 1;
fourthly, carrying out communication configuration through PLC software;
and fifthly, testing wireless communication data.
As shown in fig. 3, the control method of the vacuum circuit breaker of the mine electrical equipment further comprises a remote monitoring method, which specifically comprises the following steps:
step 1: selecting hardware equipment, wherein the hardware equipment comprises a camera 6 with a 5G function, a video server 7 capable of reading cloud video, a 5G wireless router 8, a camera bracket 9, a network cable 10, a hard disk 11 and a display 12;
step 2: the hardware equipment is assembled and connected with the video server 7, a fixed bracket is installed on the hardware equipment, the operation parameters of the equipment can be monitored, the wireless router is installed to ensure that signals are not blocked, and the video server 7 is assembled;
step 3: equipment debugging and server debugging, wherein after the video server 7 is started, configuration and hard disk initialization are carried out according to a setting guide, and the 5G wireless router 8 is configured to ensure that front-end equipment is in a wireless signal range; the IP address and the mapping address of the camera 6 are configured, and the camera 6 is connected in the server. And debugging the camera image, and adding a camera in the server, so that the operation parameters and the environment safety state of the vacuum circuit breaker of the remote substation can be seen through the local display.
According to the embodiment, after lightning trip of the substation in the remote area of the concentrating mill can be realized, the environment in the substation can be checked and analyzed at the first time through the 5G wireless video, the problem is treated, the critical effect is achieved, the emergency accident treatment efficiency is improved compared with the situation that personnel are required to confirm on site before, after the substation is electrified, the condition that no abnormality exists on site is confirmed according to a video feedback picture, the PLC is controlled by the 5G wireless device to conduct remote switch-on after the parameter of the vacuum circuit breaker is not abnormal, production equipment can be normally started after the switch-on is free of problems, the influence range of the accident is reduced, and the emergency accident treatment time is greatly shortened.
The present embodiment is only for explanation of the present invention and is not to be construed as limiting the present invention, and modifications to the present embodiment, which may not creatively contribute to the present invention as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present invention.
Claims (8)
1. The control method of the vacuum circuit breaker of the mine electrical equipment comprises the step of controlling the vacuum circuit breaker by using a PLC system, and is characterized by further comprising the following steps:
the first step, designing a control loop of the vacuum circuit breaker to be controlled by the PLC system;
secondly, controlling the PLC system by using wireless transmission equipment;
thirdly, selecting a hardware mounting connection mode of the wireless communication equipment and the PLC system;
fourthly, carrying out communication configuration through PLC software;
and fifthly, testing wireless communication data.
2. The control method of a vacuum circuit breaker for electrical mining equipment according to claim 1, wherein the first step is to design a control loop of the vacuum circuit breaker, and the specific steps include:
step 1, adding a change-over switch SA control to the PLC system for distinguishing local control or remote control;
step 2, adding remote starting point positions and stopping point positions by the PLC system, and controlling switching-on by starting point position when the change-over switch SA is switched to remote control and switching-off by stopping point position;
step 3, connecting the input end of the PLC system with a public port: the input power supply port of the PLC system is AC220V, the output power supply port of the PLC system is DC24V, one end of the control line connection wire of the PLC system is connected with the input end of the PLC system, and the other end of the control line connection wire of the PLC system is connected with the public port of the PLC system;
step 4, setting an input/output module indicator lamp in the PLC system, and checking whether the input/output module indicator lamp is lightened or not simultaneously after signals exist between the input end and the public port, so as to confirm that a field signal feedback line is correct;
step 5, programming a start-stop control program: the PLC system is used for programming a start-stop control program and an alarm signal acquisition program, wherein the start-stop control program and the alarm signal acquisition program comprise a main program, a stop program, an emergency stop program and a reset program;
step 6, testing procedure: and downloading the start-stop control program to a CPU of the PLC system for online debugging, and firstly checking and ensuring that a sensor of the PLC system is error-free when an abnormal condition occurs, and modifying the start-stop control program.
3. The control method of a vacuum circuit breaker for electrical mining equipment according to claim 1, wherein: in the second step, the wireless transmission device adopts a 5G wireless transmission device.
4. The control method of a vacuum circuit breaker for electrical mining equipment according to claim 1, wherein: and in the third step, the hardware mounting connection mode is that a wireless signal transmitter is connected with an upper computer CPU of the PLC system by using a Profinet protocol.
5. The control method of a vacuum circuit breaker for electrical mining equipment according to claim 1, wherein: and in the fourth step, when the communication configuration is performed through the PLC software, the method comprises the following steps: step 1, creating a new project; step 2, adding an upper computer CPU and configuring parameters; and 3, configuring network configuration, and setting the parameters of the Ethernet interface to match with the intelligent equipment.
6. The control method of a vacuum circuit breaker for electrical mining equipment according to claim 5, wherein: the ethernet interface parameter setting step includes the following steps in addition to setting the ethernet address: step 1: setting an operation mode, setting a transmission area and updating time; step 2, setting simple input/output correspondence of a main program; step 3, downloading hardware and programs; and 4, testing the system.
7. The control method of a vacuum circuit breaker for electrical mining equipment according to claim 1, wherein: and in the fifth step, when the wireless communication data is tested, the PLC system comprises two PLC controllers: a No. 1 PLC controller and a No. 2 PLC controller; the method comprises the following steps: step 1, inputting a signal to an I point of a No. 1 PLC controller, and checking whether an output signal exists at a Q point of a corresponding No. 2 PLC controller; and step 2, inputting a signal to the I point of the No. 2 PLC controller, and checking whether an output signal exists at the Q point of the corresponding No. 1 PLC.
8. The control method of a vacuum circuit breaker for electrical mining equipment according to claim 1, wherein: the method also comprises a remote monitoring method, which comprises the following specific steps:
step 1: selecting hardware equipment, wherein the hardware equipment comprises a camera with a 5G function, a video server capable of reading cloud video, a 5G wireless router, a camera bracket, a network cable, a hard disk and a display;
step 2: assembling and connecting the hardware equipment with the video server;
step 3: and after the video server is started, configuring and hard disk initializing according to a setting guide, configuring the 5G wireless router, configuring the IP address and the mapping address of the camera, and setting and connecting the camera in the server.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311458102.3A CN117410130A (en) | 2023-11-05 | 2023-11-05 | Control method of vacuum circuit breaker of mine electrical equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311458102.3A CN117410130A (en) | 2023-11-05 | 2023-11-05 | Control method of vacuum circuit breaker of mine electrical equipment |
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| CN117410130A true CN117410130A (en) | 2024-01-16 |
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| CN202311458102.3A Pending CN117410130A (en) | 2023-11-05 | 2023-11-05 | Control method of vacuum circuit breaker of mine electrical equipment |
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