CN219875000U - Protection device for enclosed bus of power generation equipment - Google Patents
Protection device for enclosed bus of power generation equipment Download PDFInfo
- Publication number
- CN219875000U CN219875000U CN202321265005.8U CN202321265005U CN219875000U CN 219875000 U CN219875000 U CN 219875000U CN 202321265005 U CN202321265005 U CN 202321265005U CN 219875000 U CN219875000 U CN 219875000U
- Authority
- CN
- China
- Prior art keywords
- electromagnetic valve
- air inlet
- pressure
- power generation
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000010248 power generation Methods 0.000 title claims abstract description 19
- 238000011282 treatment Methods 0.000 claims abstract description 19
- 230000003993 interaction Effects 0.000 claims abstract description 17
- 238000012545 processing Methods 0.000 claims abstract description 6
- 238000004891 communication Methods 0.000 claims description 10
- 230000002159 abnormal effect Effects 0.000 claims description 4
- 230000011664 signaling Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 6
- 238000012544 monitoring process Methods 0.000 description 9
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000007791 dehumidification Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011221 initial treatment Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Landscapes
- Ventilation (AREA)
Abstract
The utility model provides a protection device for a closed bus of power generation equipment, which comprises: a cabinet body; the air inlet treatment loop comprises an air inlet, an inflation electromagnetic valve, an air filter, a temperature and humidity sensor and a heater which are sequentially connected, wherein the air inlet is connected with an external compressed air source, and the heater is communicated with the lower part of the closed bus barrel; the air inlet is positioned outside the cabinet body; the air filter can adopt an SMC air filter; the exhaust loop comprises an exhaust electromagnetic valve and an exhaust port which are connected in sequence; the exhaust electromagnetic valve is communicated with the upper part of the closed bus cylinder, and a pressure transmitter is arranged between the exhaust electromagnetic valve and the closed bus cylinder; the PLC is electrically connected with each electric element of the air inlet processing loop and the air outlet loop respectively; the man-machine interaction panel is electrically connected with the PLC; the air treatment and the pressure control are integrated in the cabinet, so that the integrated level is high, the equipment is simple, the investment cost is low, and the maintenance cost is low.
Description
Technical Field
The utility model relates to the technical field of electrical equipment, in particular to a protection device for a closed bus of power generation equipment.
Background
At present, a generator enclosed bus is usually protected by a micro-positive pressure device, and a traditional micro-positive pressure device usually consists of an independent air pressure system, air treatment equipment and a pressure control cabinet. The independent compressor provides the required compressed air for the whole system, and the compressed air must be dehumidified by an air treatment device before entering the bus because the compressed air under normal conditions contains a certain moisture and the air with the moisture is strictly forbidden to enter the bus. The whole system is controlled by a plurality of digital display meters in the pressure control cabinet, the pressure control digital display meters are used for detecting the pressure condition in the bus, and the humidity control digital display meters are used for detecting the humidity condition of air in the air treatment equipment.
The existing micro-positive pressure device is composed of an independent air pressure system, air treatment equipment and a pressure control cabinet, so that on one hand, the contained equipment is relatively complex and more in number, and the problems of more occupied space of a production site, higher investment cost and operation and maintenance cost, troublesome installation and use, large debugging workload, easiness in occurrence of faults and the like can be caused. On the other hand, the digital display instrument controller, the conventional control loop and the meter display mode are adopted, the monitoring operation and the data setting are dispersed, the realized control function is less, and the control precision is relatively low. Moreover, the digital display instrument has relatively high requirements on the use environment and high damage risk.
Disclosure of Invention
In view of the above drawbacks of the prior art, the present utility model is directed to a protection device for a closed bus of a power generation device, which is used for solving the problems of more devices and poor control effect of a micro positive pressure device in the prior art.
To achieve the above and other related objects, the present utility model provides a protection device for a closed bus of a power generation device, including:
a cabinet body;
the air inlet treatment loop comprises an air inlet, an inflation electromagnetic valve, an air filter, a temperature and humidity sensor and a heater which are sequentially connected, wherein the air inlet is connected with an external compressed air source, and the heater is communicated with the lower part of the closed bus barrel; the air inlet is positioned outside the cabinet body; the air filter can adopt an SMC air filter;
the exhaust loop comprises an exhaust electromagnetic valve and an exhaust port which are connected in sequence; the exhaust electromagnetic valve is communicated with the upper part of the closed bus cylinder, and a pressure transmitter is arranged between the exhaust electromagnetic valve and the closed bus cylinder;
the PLC is electrically connected with each electric element of the air inlet processing loop and the air outlet loop respectively;
and the man-machine interaction panel is electrically connected with the PLC.
By adopting the technical scheme, the air treatment and the pressure control are integrated in one cabinet, so that the integration level is high, the equipment is simple, the investment cost is low, and the maintenance cost is low; the compressed air which is universal in a workshop can be directly introduced into the protection device, an air compressor is not required to be additionally arranged, the noise of the site is reduced, and the clean degree of the production environment is improved; because the PLC is adopted, data exchange can be carried out with other DCS products, and the adaptability to the environment is far better than that of a digital display instrument adopted in the prior art, and the control precision and the response speed are also better; the PLC is combined with the man-machine interaction panel, the monitoring operation and the data setting are integrated, the monitoring control function can be realized, and the intelligent degree is high.
In an embodiment of the utility model, the PLC controller is electrically connected with the temperature and humidity sensor and the pressure transmitter respectively, receives the sensing signals, and is electrically connected with the inflation electromagnetic valve, the heater and the exhaust electromagnetic valve respectively, and sends out the control signals.
By adopting the technical scheme, the PLC controller judges the temperature and humidity state of the fed gas according to the sensing signals of the received temperature and humidity sensor, judges the pressure state in the sealed busbar cylinder according to the sensing signals of the received pressure transmitter, and sends corresponding control signals to the inflation electromagnetic valve, the heater and the exhaust electromagnetic valve.
In an embodiment of the present utility model, the PLC controller is provided with: the air inlet pressure control module is used for receiving sensor signals of the pressure transmitter in real time, controlling the inflation electromagnetic valve to be opened when the monitored pressure value of the pressure transmitter is lower than a set lower limit threshold value, and controlling the first inflation electromagnetic valve and the second inflation electromagnetic valve to be closed when the monitored pressure value rises to a set upper limit threshold value; and the air inlet temperature and humidity control module is used for receiving sensor signals of the temperature and humidity sensor in real time, and starting the heater when the humidity value is higher than the set humidity threshold value or the temperature value is lower than the set temperature threshold value.
In an embodiment of the present utility model, the PLC controller is further provided with: and the pressure alarm protection module is used for sending out a pressure alarm signal and controlling the opening of the exhaust electromagnetic valve when the monitored pressure value of the pressure transmitter exceeds a set abnormal threshold value, and controlling the closing of the exhaust electromagnetic valve and resetting the pressure alarm signal when the monitored pressure value is reduced to a set upper limit threshold value.
In an embodiment of the utility model, an inflation manual valve is arranged between the inflation electromagnetic valve and the air inlet.
By adopting the technical scheme, the air inlet treatment loop can be completely closed by manually closing the air charging manual valve, and the air charging manual valve needs to be manually opened before air inlet treatment.
In an embodiment of the utility model, a pressure gauge is arranged between the inflation manual valve and the air inlet, and the pressure gauge is positioned outside the cabinet body.
By adopting the technical scheme, the pressure value of the compressed air can be quickly checked through the pressure gauge outside the cabinet body.
In an embodiment of the utility model, the human-computer interaction panel adopts a touch screen or a display screen with control buttons.
By adopting the technical scheme, the system is manually controlled through the man-machine interaction panel, and automatically controlled parameters can be set in the man-machine interaction panel.
In an embodiment of the utility model, the air inlet is located at a side of the cabinet body, and the air outlet is located at a top of the cabinet body.
In an embodiment of the utility model, the PLC controller is connected to a communication unit, and one or more of ethernet, WIFI and mobile data communication modes are adopted.
By adopting the technical scheme, a plurality of communication modes are supported, and communication with a main control system of a workshop is facilitated.
As described above, the protection device for the closed bus of the power generation equipment has the following beneficial effects:
1. the air compressor which is necessary to be used in the existing protection of the enclosed bus is reduced, the noise on site is reduced, the compressed air which is commonly used in a workshop is directly connected, the compressed air is subjected to primary treatment through an air filter, and the secondary treatment is performed by a heater after the temperature and humidity detection, so that the compressed air entering the cylinder of the enclosed bus can meet the temperature and humidity requirements;
2. the air treatment and the pressure control are integrated in one cabinet, so that the integrated level is high, the equipment is simple, the investment cost is low, and the maintenance cost is low;
3. because the PLC is adopted, data exchange can be carried out with other DCS products, and the adaptability to the environment is far better than that of a digital display instrument adopted in the prior art, and the control precision and the response speed are also better;
4. the PLC is combined with the man-machine interaction panel, the monitoring operation and the data setting are integrated, the monitoring control function can be realized, and the intelligent degree is high.
Drawings
Fig. 1 is a schematic structural diagram of a protection device for a closed busbar of a power generation device according to an embodiment of the present utility model.
Description of the reference numerals
1. A cabinet body; 2. an air inlet; 3. a pressure gauge; 4. a pneumatic manual valve; 5. an inflation electromagnetic valve; 6. an air filter; 7. a temperature and humidity sensor; 8. a heater; 9. an exhaust electromagnetic valve; 10. an exhaust port; 11. a pressure transmitter; 12. a PLC controller; 13. a man-machine interaction panel; 14. and a communication unit.
Detailed Description
Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present utility model, which is described by the following specific examples.
Please refer to fig. 1. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the utility model to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the utility model, are not intended to be critical to the essential characteristics of the utility model, but are intended to fall within the spirit and scope of the utility model. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the utility model, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the utility model may be practiced.
Referring to fig. 1, the present utility model provides a protection device for a closed bus of a power generation device, including:
a cabinet body 1;
the air inlet treatment loop comprises an air inlet 2, an inflation electromagnetic valve 5, an air filter 6, a temperature and humidity sensor 7 and a heater 8 which are sequentially connected, wherein the air inlet 2 is connected with an external compressed air source, and the heater 8 is communicated with the lower part of the closed bus barrel; the air inlet 2 is positioned outside the cabinet body 1; the air filter 6 may be an SMC air filter;
the exhaust loop comprises an exhaust electromagnetic valve 9 and an exhaust port 10 which are sequentially connected; the exhaust electromagnetic valve 9 is communicated with the upper part of the enclosed bus cylinder, and a pressure transmitter 11 is arranged between the exhaust electromagnetic valve 9 and the enclosed bus cylinder;
the PLC 12 is electrically connected with each electric element of the air inlet processing circuit and the air outlet circuit respectively;
a man-machine interaction panel 13 electrically connected with the PLC controller 12;
the air treatment and the pressure control are integrated in one cabinet, so that the integrated level is high, the equipment is simple, the investment cost is low, and the maintenance cost is low; the compressed air which is universal in a workshop can be directly introduced into the protection device, an air compressor is not required to be additionally arranged, the noise of the site is reduced, and the clean degree of the production environment is improved; because the PLC 12 is adopted, data exchange can be carried out with other DCS products, and the adaptability to the environment is far better than that of a digital display instrument adopted in the prior art, and the control precision and the response speed are also better; the PLC 12 is combined with the human-computer interaction panel 13, the monitoring operation and the data setting are integrated, the monitoring control function can be realized, and the intelligent degree is high.
The PLC controller 12 is respectively and electrically connected with the temperature and humidity sensor 7 and the pressure transmitter 11 and receives sensing signals, and the PLC controller 12 is respectively and electrically connected with the inflation electromagnetic valve 5, the heater 8 and the exhaust electromagnetic valve 9 and sends out control signals; the PLC 12 judges the temperature and humidity state of the fed gas according to the sensing signal received by the temperature and humidity sensor 7, judges the pressure state in the closed busbar cylinder according to the sensing signal received by the pressure transmitter 11, and sends corresponding control signals to the inflation electromagnetic valve 5, the heater 8 and the exhaust electromagnetic valve 9.
The PLC controller 12 is provided with: the air inlet pressure control module is used for receiving sensor signals of the pressure transmitter 11 in real time, controlling the inflation electromagnetic valve 5 to be opened when the monitored pressure value of the pressure transmitter 11 is lower than a set lower limit threshold value, and controlling the first inflation electromagnetic valve 5 and the second inflation electromagnetic valve 5 to be closed when the monitored pressure value rises to a set upper limit threshold value; and the air inlet temperature and humidity control module is used for receiving sensor signals of the temperature and humidity sensor 7 in real time, and starting the heater 8 when the humidity value is higher than the set humidity threshold value or the temperature value is lower than the set temperature threshold value.
The PLC controller 12 is also provided with: the pressure alarm protection module is used for sending out a pressure alarm signal and controlling the exhaust electromagnetic valve 9 to be opened when the monitored pressure value of the pressure transmitter 11 exceeds a set abnormal threshold value, and controlling the exhaust electromagnetic valve 9 to be closed and resetting the pressure alarm signal when the monitored pressure value is reduced to a set upper limit threshold value.
An inflation manual valve 4 is provided between the inflation electromagnetic valve 5 and the intake port 2, the intake processing circuit can be completely closed by manually closing the inflation manual valve 4, and the inflation manual valve 4 needs to be manually opened before the intake processing.
A pressure gauge 3 is arranged between the inflation manual valve 4 and the air inlet 2, the pressure gauge 3 is positioned outside the cabinet body 1, and the pressure value of the fed compressed air can be quickly checked through the pressure gauge 3 outside the cabinet body 1.
The man-machine interaction panel 13 adopts a touch screen or a display screen with control buttons; the system is manually controlled through the man-machine interaction panel 13, and automatically controlled parameters can be set in the man-machine interaction panel 13.
The air inlet 2 is positioned at the side part of the cabinet body 1, and the air outlet 10 is positioned at the top part of the cabinet body 1.
The PLC controller 12 is connected with a communication unit 14, and adopts one or more of ethernet, WIFI and mobile data communication modes; and a plurality of communication modes are supported, so that communication with a main control system of a workshop is facilitated.
The working principle of the protection device for the closed bus of the power generation equipment is as follows: the protection device has two control modes, namely automatic control and manual control, wherein the automatic control mode and the manual control mode are divided according to pressure value set points: if the lower limit threshold is set to 300Pa, the upper limit threshold is set to 2000Pa and the abnormal threshold is set to 3500Pa, the system can only operate in an automatic control mode when the pressure in the closed busbar cylinder is smaller than 300 Pa; when the pressure in the closed bus cylinder is 300-2000Pa, the system can be operated in an automatic control mode or a manual control mode, and the PLC 12 can automatically control the inflation or manually control the inflation through the man-machine interaction panel 13 until the pressure is increased to 2000Pa, and the inflation is stopped; when the pressure in the closed bus cylinder exceeds 3500Pa, the pressure alarm protection module is started, the exhaust electromagnetic valve 9 is controlled to be opened, the exhaust is stopped until the pressure in the closed bus cylinder is reduced to 2000Pa, at the moment, the exhaust electromagnetic valve 9 is closed, and the pressure alarm signal is reset.
In the automatic control mode, when the pressure transmitter 11 monitors that the pressure in the closed bus cylinder is smaller than a set lower limit threshold value, the PLC 12 sends a control signal to control the inflation electromagnetic valve 5 to be opened, compressed air enters the closed bus cylinder through the air inlet 2, the pressure gauge 3, the inflation manual valve 4, the inflation electromagnetic valve 5, the air filter 6, the temperature and humidity sensor 7 and the heater 8, in the process, the compressed air is filtered by the air filter 6 to form primary dehumidification treatment, the temperature and humidity of air flowing out of the air filter 6 are detected through the temperature and humidity sensor 7, the heater 8 is started when the humidity value is higher than the set humidity threshold value or the temperature value is lower than the set temperature threshold value, and the compressed air is heated to form secondary dehumidification treatment until the set humidity threshold value and the set temperature threshold value are reached, and then the compressed air is sent into the closed bus cylinder; and when the pressure transmitter 11 monitors that the pressure in the closed busbar cylinder reaches the set upper limit threshold, the PLC 12 sends out a control signal to control the inflation electromagnetic valve 5 to be closed.
In summary, the utility model reduces the air compressor which is necessary for the protection of the existing enclosed bus, reduces the noise on site, directly introduces the general compressed air in the workshop, carries out primary treatment through the air filter 6, carries out secondary treatment by using the heater 8 after temperature and humidity detection, and ensures that the compressed air entering the enclosed bus cylinder can meet the temperature and humidity requirements; the air treatment and the pressure control are integrated in one cabinet, so that the integrated level is high, the equipment is simple, the investment cost is low, and the maintenance cost is low; because the PLC 12 is adopted, data exchange can be carried out with other DCS products, and the adaptability to the environment is far better than that of a digital display instrument adopted in the prior art, and the control precision and the response speed are also better; the PLC 12 is combined with the human-computer interaction panel 13, the monitoring operation and the data setting are integrated, the monitoring control function can be realized, and the intelligent degree is high. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (9)
1. A protection device for a closed busbar of a power generation device, comprising:
a cabinet body (1);
the air inlet treatment loop comprises an air inlet (2), an inflation electromagnetic valve (5), an air filter (6), a temperature and humidity sensor (7) and a heater (8) which are sequentially connected, wherein the air inlet (2) is connected with an external compressed air source, and the heater (8) is communicated with the lower part of the closed bus barrel; the air inlet (2) is positioned outside the cabinet body (1);
the exhaust loop comprises an exhaust electromagnetic valve (9) and an exhaust port (10) which are connected in sequence; the exhaust electromagnetic valve (9) is communicated with the upper part of the closed bus cylinder, and a pressure transmitter (11) is arranged between the exhaust electromagnetic valve (9) and the closed bus cylinder;
the PLC (12) is respectively and electrically connected with the electric elements of the air inlet processing loop and the air outlet loop;
and the man-machine interaction panel (13) is electrically connected with the PLC (12).
2. The protection device for a closed bus of a power generation device according to claim 1, wherein: the PLC controller (12) is respectively electrically connected with the temperature and humidity sensor (7) and the pressure transmitter (11) and receives sensing signals, and the PLC controller (12) is respectively electrically connected with the inflation electromagnetic valve (5), the heater (8) and the exhaust electromagnetic valve (9) and sends control signals.
3. The protection device for a closed bus of a power generation device according to claim 2, wherein: the PLC (12) is internally provided with: the air inlet pressure control module is used for receiving sensing signals of the pressure transmitter (11) in real time, controlling the inflation electromagnetic valve (5) to be opened when the monitored pressure value of the pressure transmitter (11) is lower than a set lower limit threshold value, and controlling the inflation electromagnetic valve (5) to be closed when the monitored pressure value rises to a set upper limit threshold value; and the air inlet temperature and humidity control module is used for receiving sensor signals of the temperature and humidity sensor (7) in real time, and starting the heater (8) when the humidity value is higher than a set humidity threshold value or the temperature value is lower than a set temperature threshold value.
4. A protection device for a closed busbar of a power generation device according to claim 3, wherein: the PLC (12) is internally provided with: and the pressure alarm protection module is used for sending out a pressure alarm signal and controlling the exhaust electromagnetic valve (9) to be opened when the monitored pressure value of the pressure transmitter (11) exceeds a set abnormal threshold value, and controlling the exhaust electromagnetic valve (9) to be closed and resetting the pressure alarm signal when the monitored pressure value is reduced to a set upper limit threshold value.
5. The protection device for a closed bus of a power generation device according to claim 1, wherein: an inflation manual valve (4) is arranged between the inflation electromagnetic valve (5) and the air inlet (2).
6. The protection device for a closed bus of a power generation device according to claim 5, wherein: a pressure gauge (3) is arranged between the inflation manual valve (4) and the air inlet (2), and the pressure gauge (3) is positioned outside the cabinet body (1).
7. The protection device for a closed bus of a power generation device according to claim 1, wherein: the man-machine interaction panel (13) adopts a touch screen or a display screen with control buttons.
8. The protection device for a closed bus of a power generation device according to claim 1, wherein: the air inlet (2) is positioned at the side part of the cabinet body (1), and the air outlet (10) is positioned at the top part of the cabinet body (1).
9. The protection device for a closed bus of a power generation device according to claim 1, wherein: the PLC controller (12) is connected with a communication unit (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321265005.8U CN219875000U (en) | 2023-05-23 | 2023-05-23 | Protection device for enclosed bus of power generation equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321265005.8U CN219875000U (en) | 2023-05-23 | 2023-05-23 | Protection device for enclosed bus of power generation equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219875000U true CN219875000U (en) | 2023-10-20 |
Family
ID=88336729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321265005.8U Active CN219875000U (en) | 2023-05-23 | 2023-05-23 | Protection device for enclosed bus of power generation equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219875000U (en) |
-
2023
- 2023-05-23 CN CN202321265005.8U patent/CN219875000U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104715580B (en) | Self-calibration GIS room sulfur hexafluoride gas leakage monitoring warning systems | |
| CN103380304B (en) | Compressed air maintenance tool and the customer control device that is equipped with it | |
| CN110568350B (en) | Maintenance-free intelligent gas density monitoring device, method and system | |
| CN111642118A (en) | Positive-pressure explosion-proof control cabinet and control method thereof | |
| CN203376627U (en) | Automatic power distribution on-line monitoring system | |
| CN110201462A (en) | A kind of dust explosion protection monitoring alarm applied in deduster | |
| CN203825781U (en) | Self-calibration type sulfur hexafluoride gas leakage monitoring alarm device in GIS chamber | |
| CN219875000U (en) | Protection device for enclosed bus of power generation equipment | |
| CN110906974A (en) | Real-time monitoring device for operation condition of transformer substation | |
| CN113949616A (en) | Equipment fault monitoring system based on wireless sensor network | |
| CN206096909U (en) | Intelligent monitoring system | |
| CN208172630U (en) | A kind of electric panel room temperature and humidity control system | |
| CN206894122U (en) | A kind of anti-condensation device of enclosed busbar | |
| CN111897266B (en) | Low-power consumption intelligent boiler controller and boiler thereof | |
| CN205016993U (en) | Motor condition monitoring type circuit breaker | |
| CN108374839A (en) | Gas shield device and air axis protective device | |
| CN207301746U (en) | Integral type peculiar to vessel monitors computer | |
| CN102562557A (en) | Method for monitoring vacuum pump of photovoltaic equipment and system for realizing method | |
| CN113541318A (en) | Remote monitoring device for underground power distribution point | |
| CN206161757U (en) | High -speed reliable opening stops durable testboard of starter | |
| CN105278416A (en) | Electrostatic dust removal facility monitoring terminal | |
| CN206353065U (en) | A kind of gas insulation switch cabinet air chamber pressure state on_line monitoring device | |
| CN212933741U (en) | Fan fault wireless alarm device in control cabinet | |
| CN219037012U (en) | Ventilation monitoring system for cable production workshop | |
| CN204965232U (en) | Hinder switching state monitor function's intelligent control ware with electricity |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |