CN110868056A - Dynamic switching device for remote control frequency converter - Google Patents
Dynamic switching device for remote control frequency converter Download PDFInfo
- Publication number
- CN110868056A CN110868056A CN201911358606.1A CN201911358606A CN110868056A CN 110868056 A CN110868056 A CN 110868056A CN 201911358606 A CN201911358606 A CN 201911358606A CN 110868056 A CN110868056 A CN 110868056A
- Authority
- CN
- China
- Prior art keywords
- frequency converter
- loop
- signal
- contactor
- switching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012423 maintenance Methods 0.000 claims description 16
- 230000007774 longterm Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
- H02P29/028—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the motor continuing operation despite the fault condition, e.g. eliminating, compensating for or remedying the fault
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a dynamic switching device for a remote control frequency converter, which comprises a PLC (programmable logic controller) and a plurality of groups of switching loops arranged in parallel; the input end of the switching loop is respectively connected with the output ends of the working frequency converter, the standby frequency converter and the overhaul frequency converter, and the output end of the switching loop is connected with a load; the PLC controller comprises an input signal module for acquiring a required state signal and an output signal module for sending a driving signal; the switching loop is connected into the PLC; the switching circuit comprises a working trunk and a standby/service trunk connected in parallel with each other. The dynamic switching device can be applied to motor loads which run for a long time and have high power supply continuity, the dynamic switching device realizes the function of remotely controlling and dynamically switching the frequency converter through the PLC, the fault of the frequency converter is rapidly switched, the possibility of human misoperation is avoided, the reliability and the safety of the dynamic switching device in a power supply system are effectively improved, and the requirement of the continuity of long-term power supply can be met.
Description
Technical Field
The invention belongs to the technical field of power supply of power systems, and particularly relates to a dynamic switching device for a remote control frequency converter.
Background
The frequency converter is used as a driving device of a motor load, and in order to ensure long-term continuous operation of the motor and prevent the frequency converter from generating faults in the working process, a plurality of frequency converters need to be configured to have standby capacity. The coordination command and the standby switching of the plurality of frequency converters need to be undertaken by the switching device, so the switching device undertakes the overall and standby switching operation tasks of the power supply system.
The perfect switching function can solve the fault switching requirement under the complex condition, if the fault occurs, the response time for manually operating the frequency converter for switching is long, meanwhile, the manual operation is easy to generate errors, and the uninterrupted operation of the power supply system cannot be completely ensured.
Disclosure of Invention
The invention aims to overcome the defects of long response time and easy error of manual frequency converter switching in the prior art, and provides a dynamic switching device for remotely controlling a frequency converter.
The invention is realized by the following technical scheme:
a dynamic switching device for a remote control frequency converter comprises a PLC controller and a plurality of groups of switching loops which are arranged in parallel; the input end of the switching loop is respectively connected with the output ends of the working frequency converter, the standby frequency converter and the overhaul frequency converter, and the output end of the switching loop is connected with a load; the PLC controller comprises an input signal module and an output signal module, the input signal module collects a required state signal, and the output signal module sends a driving signal; the switching loop is connected into the PLC; the switching loop comprises a working main line and a standby/maintenance main line which are connected in parallel, the working main line comprises an isolating switch and a loop contactor I which are connected in series, the upper port of the isolating switch is connected with the output end of the working frequency converter, and the lower port of the isolating switch is connected with the upper port of the loop contactor I; the standby/maintenance trunk line comprises a change-over switch and a No. II loop contactor which are connected in series, the change-over switch is provided with two groups of upper ports which are respectively connected with a standby frequency converter and a maintenance frequency converter, and the lower port of the change-over switch is connected with the No. II loop contactor; no. I return circuit contactor and No. II return circuit contactor end opening all are connected to the electronic switch subassembly and go up the mouth, and the electronic switch subassembly end opening is connected to short circuit contactor and output terminal and goes up the mouth, and short circuit contactor end opening carries out the short circuit connection, and output terminal end opening is connected to the load.
In the above technical solution, the switching loops are three groups.
In the above technical solution, the input signal module is configured to acquire an external control signal, where the external control signal includes a panel button signal, a frequency converter state signal, a loop device state signal, and a sensor acquisition parameter signal.
In the above technical solution, the frequency converter status signal includes a start completion signal, a fault signal, and a power failure signal; the loop device comprises an isolating switch, a contactor and a change-over switch; the sensor comprises a voltage sensor and a current sensor.
In the technical scheme, the output signal module sends control signals to the working frequency converter, the standby frequency converter, the maintenance frequency converter and the loop device.
In the above technical solution, the control signal includes a start signal and a stop signal.
In the above technical solution, the loop device includes a loop contactor and a short-circuit contactor.
In the technical scheme, the output signal module sends acquired parameter data, operation records and fault records to the upper computer and the touch screen for displaying.
The invention has the beneficial effects that:
the invention provides a dynamic switching device for a remote control frequency converter, which can be applied to motor loads which run for a long time and have higher continuity to power supply.
Drawings
FIG. 1 is a schematic diagram of a power supply system incorporating the present invention;
FIG. 2 is a schematic structural view of the present invention;
fig. 3 is a method flow diagram of a handover method of the present invention.
Wherein:
3 working frequency converter 4 standby frequency converter
5 servicing of the converter 6 load
No. 22I loop contactor of 21 isolating switch
No. 24 II loop contactor of 23 change-over switch
25 electronic switch assembly 26 short circuit contactor
For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution of the dynamic switching device for remotely controlling a frequency converter according to the present invention is further described below by referring to the drawings of the specification and the specific embodiments.
Example 1
As shown in fig. 1 and 2, a dynamic switching device for a remote control frequency converter comprises a PLC controller 1 and a plurality of groups of switching loops 2 arranged in parallel; the input end of the switching loop 2 is respectively connected with the output ends of the working frequency converter 3, the standby frequency converter 4 and the overhaul frequency converter 5, and the output end of the switching loop is connected with a load 6;
the PLC controller 1 comprises an input signal module and an output signal module, wherein the input signal module acquires a required state signal, and the output signal module sends a driving signal;
the switching loop 2 is connected into the PLC controller 1; the switching circuit 2 comprises a working trunk and a standby/service trunk connected in parallel to each other,
the working trunk line comprises an isolating switch 21 and a No. I loop contactor 22 which are connected in series, the upper port of the isolating switch 21 is connected with the output end of the working frequency converter 3, and the lower port of the isolating switch is connected with the upper port of the No. I loop contactor 22;
the standby/maintenance trunk line comprises a change-over switch 23 and a No. II loop contactor 24 which are connected in series, the change-over switch 23 is provided with two groups of upper ports which are respectively connected with a standby frequency converter 4 and a maintenance frequency converter 5, and the lower port of the change-over switch is connected with the No. II loop contactor 24;
no. I return circuit contactor 22 and No. II return circuit contactor 24 end opening all are connected to electronic switch subassembly 25 and go up the mouth, and electronic switch subassembly 25 end opening is connected to short circuit contactor 26 and output terminal and goes up the mouth, and short circuit contactor 26 end opening carries out the short circuit and connects, and output terminal end opening is connected to load 6.
The switching loops 2 are three groups.
The input signal module is used for acquiring external control signals, and the external control signals comprise panel button signals, frequency converter state signals, loop device state signals and sensor acquisition parameter signals.
The frequency converter state signal comprises a starting completion signal, a fault signal and a power failure signal; the loop device comprises an isolating switch, a contactor and a change-over switch; the sensor comprises a voltage sensor and a current sensor.
And the output signal module sends control signals to the working frequency converter 3, the standby frequency converter 4, the maintenance frequency converter 5 and the loop device.
The control signal comprises a start signal and a stop signal.
The loop device comprises a loop contactor and a short-circuit contactor.
And the output signal module sends acquired parameter data, operation records and fault records to the upper computer and the touch screen for display.
Example 2
As shown in fig. 3, the switching control method using the dynamic switching device of the present invention includes the following steps:
i Normal working procedure
(I) Initialization S1
Starting initialization;
(II) isolator State judgment S2
After initialization, firstly detecting the state of the isolating switch 21 to judge whether to prepare to start the working frequency converter 3, executing the next step when the working frequency converter is in the on state, and returning when the working frequency converter is in the off state;
(III) proximity control S3
Setting a control mode, and selecting the control mode as near control;
(IV) working frequency converter failure judgment S4
Judging whether the working power supply fails or not according to the fault signal of the working frequency converter 3, if so, returning, and if not, executing the next step;
(V) sending a start signal S5
Sending a starting signal to the working frequency converter 3;
(VI) sending contactor make signal S6
After a starting signal of the working frequency converter 3 is sent, the No. I loop contactor 22 is switched on;
(VII) receiving the Start done Signal S7
After receiving the starting signal, the working frequency converter 3 starts to run, and returns a starting completion signal after the starting is completed;
(VIII) sending an electronic switch-on signal S8
After receiving a start completion signal returned by the working frequency converter 3, sending a switching-on signal of the electronic switch component 25, and switching on the electronic switch component 25;
(IX) make connection S9
After the electronic switch component 25 is conducted, the connection of the whole working trunk line is completed, the connection with a load is conducted, and power supply output is realized;
II dynamic switching control program
(X) initialization S10
Starting initialization;
(XI) operating frequency converter State S11
Receiving a starting completion signal of the working frequency converter 3;
(XII) remote control S12
Setting a control mode and selecting remote control;
(XIII) Change switch State selection S13
Under the remote control condition, the state of the change-over switch 23 is detected, and if the standby frequency converter 4 is selected, the step S14 is executed; if the maintenance frequency converter 5 is selected, executing the step S20;
(XIV) working frequency converter failure judgment S14
Judging whether the working frequency converter 3 has a fault according to the fault signal of the working frequency converter 3, if the working frequency converter 3 has a fault, returning, and if the working frequency converter 3 has no fault, executing the next step;
(XV) send start signal S15
Sending a starting signal to the standby frequency converter 4;
(XVI) sending contactor make signal S16
After a starting signal of the standby frequency converter 4 or the maintenance frequency converter 5 is sent, the loop contactor II 24 is switched on;
(XVII) receiving the start completion signal S17
After receiving the starting signal, the standby frequency converter 4 or the maintenance frequency converter 5 starts to run, and returns a starting completion signal after the starting is completed;
(XVIII) sending an electronic switch-on signal S18
After receiving a start completion signal of the standby frequency converter 4 or the maintenance frequency converter 5, sending a switch-on signal of the electronic switch component 25, and switching on the electronic switch component 25;
(XIV) make connection S19
After the electronic switch assembly 25 is conducted, the connection of the whole standby/maintenance trunk line is completed, the connection with the load is connected, and power supply output is realized;
(XX) working frequency converter fault judgment S20
Judging whether the working frequency converter 3 has a fault according to the fault signal of the working frequency converter 3, if the working frequency converter 3 has a fault, returning, and if the working frequency converter 3 has no fault, executing the next step;
(XXI) sending an activation signal S21
And sending a starting signal to the maintenance frequency converter 5.
The invention provides a frequency converter dynamic switching device with a remote control function based on PLC control, which ensures the continuous operation of a power supply system. The dynamic switching device can be applied to motor loads which run for a long time and have high continuity to power supply, the function of remotely and dynamically switching the frequency converter can be realized through the PLC, the fault of the frequency converter can be rapidly switched, the possibility of artificial misoperation is avoided, the reliability and the safety of the dynamic switching device in a power supply system are effectively improved, and the continuity requirement of long-term power supply can be met.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.
Claims (8)
1. A dynamic switching device for a remote control frequency converter is characterized in that: comprises a PLC controller (1) and a plurality of groups of switching loops (2) which are arranged in parallel; the input end of the switching loop (2) is respectively connected with the output ends of the working frequency converter (3), the standby frequency converter (4) and the overhaul frequency converter (5), and the output end of the switching loop is connected with a load (6);
the PLC controller (1) comprises an input signal module and an output signal module, wherein the input signal module acquires a required state signal, and the output signal module sends a driving signal;
the switching loop (2) is connected into the PLC controller (1); the switching circuit (2) comprises a working trunk and a standby/service trunk which are connected in parallel with each other,
the working trunk line comprises an isolating switch (21) and a No. I loop contactor (22) which are connected in series, the upper port of the isolating switch (21) is connected with the output end of the working frequency converter (3), and the lower port of the isolating switch is connected with the upper port of the No. I loop contactor (22);
the standby/maintenance trunk line comprises a change-over switch (23) and a No. II loop contactor (24) which are connected in series, the change-over switch (23) is provided with two groups of upper ports which are respectively connected with a standby frequency converter (4) and a maintenance frequency converter (5), and the lower port of the change-over switch is connected with the No. II loop contactor (24);
no. I return circuit contactor (22) and No. II return circuit contactor (24) end socket all are connected to electronic switch subassembly (25) and go up the mouth, and electronic switch subassembly (25) end socket is connected to short circuit contactor (26) and output terminal and goes up the mouth, and short circuit contactor (26) end socket carries out the short circuit and connects, and output terminal end socket is connected to load (6).
2. The dynamic switching apparatus for a remote controlled inverter according to claim 1, wherein: the switching loops (2) are three groups.
3. The dynamic switching apparatus for a remote controlled inverter according to claim 1, wherein: the input signal module is used for acquiring external control signals, and the external control signals comprise panel button signals, frequency converter state signals, loop device state signals and sensor acquisition parameter signals.
4. The dynamic switching apparatus for a remote controlled inverter according to claim 3, wherein: the frequency converter state signal comprises a starting completion signal, a fault signal and a power failure signal; the loop device comprises an isolating switch, a contactor and a change-over switch; the sensor comprises a voltage sensor and a current sensor.
5. The dynamic switching apparatus for a remote controlled inverter according to claim 1, wherein: and the output signal module sends a control signal to the working frequency converter (3), the standby frequency converter (4), the maintenance frequency converter (5) and the loop device.
6. The dynamic switching apparatus for a remote controlled inverter according to claim 5, wherein: the control signal comprises a start signal and a stop signal.
7. The dynamic switching apparatus for a remote controlled inverter according to claim 5, wherein: the loop device comprises a loop contactor and a short-circuit contactor.
8. The dynamic switching apparatus for a remote controlled inverter according to claim 1, wherein: and the output signal module sends acquired parameter data, operation records and fault records to the upper computer and the touch screen for display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911358606.1A CN110868056A (en) | 2019-12-25 | 2019-12-25 | Dynamic switching device for remote control frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911358606.1A CN110868056A (en) | 2019-12-25 | 2019-12-25 | Dynamic switching device for remote control frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110868056A true CN110868056A (en) | 2020-03-06 |
Family
ID=69660060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911358606.1A Pending CN110868056A (en) | 2019-12-25 | 2019-12-25 | Dynamic switching device for remote control frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110868056A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113410848A (en) * | 2021-05-24 | 2021-09-17 | 核工业理化工程研究院 | Touch reactive power compensation device |
| CN114374353A (en) * | 2021-12-28 | 2022-04-19 | 佛山市德力泰科技有限公司 | Automatic and efficient switching method for kiln transmission standby frequency converter |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1960853A1 (en) * | 1968-12-16 | 1970-07-02 | Hirschmann Radiotechnik | Switching device for filling transmitter |
| GB1241881A (en) * | 1968-04-26 | 1971-08-04 | Licentia Gmbh | Apparatus for switching over a load from a power supply unit to a stand-by power supply or spare unit |
| CN102377385A (en) * | 2010-08-26 | 2012-03-14 | 日立电梯（中国）有限公司 | Bypass variable-frequency controller with phase detection |
| CN102411332A (en) * | 2011-12-28 | 2012-04-11 | 中国船舶重工集团公司第七一一研究所 | PTI (Power Take In)/PTO (Power Take Out) mode switching control device based on PLC (Programmable Logic Controller) control and control method thereof |
| US20120205974A1 (en) * | 2011-02-10 | 2012-08-16 | Mccaslin Shawn R | Regulation of Inverter DC Input Voltage in Photovoltaic Arrays |
| WO2014026178A1 (en) * | 2012-08-10 | 2014-02-13 | Texas Instruments Incorporated | Switched mode assisted linear regulator |
| CN106059444A (en) * | 2016-07-29 | 2016-10-26 | 浙江陀曼智造科技有限公司 | Synchronous feeding energy-saving circuit |
| CN107069935A (en) * | 2017-03-28 | 2017-08-18 | 核工业理化工程研究院 | The power switching device controlled based on PLC |
| CN210958140U (en) * | 2019-12-25 | 2020-07-07 | 核工业理化工程研究院 | Dynamic switching device for remote control frequency converter |
-
2019
- 2019-12-25 CN CN201911358606.1A patent/CN110868056A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1241881A (en) * | 1968-04-26 | 1971-08-04 | Licentia Gmbh | Apparatus for switching over a load from a power supply unit to a stand-by power supply or spare unit |
| DE1960853A1 (en) * | 1968-12-16 | 1970-07-02 | Hirschmann Radiotechnik | Switching device for filling transmitter |
| CN102377385A (en) * | 2010-08-26 | 2012-03-14 | 日立电梯（中国）有限公司 | Bypass variable-frequency controller with phase detection |
| US20120205974A1 (en) * | 2011-02-10 | 2012-08-16 | Mccaslin Shawn R | Regulation of Inverter DC Input Voltage in Photovoltaic Arrays |
| CN102411332A (en) * | 2011-12-28 | 2012-04-11 | 中国船舶重工集团公司第七一一研究所 | PTI (Power Take In)/PTO (Power Take Out) mode switching control device based on PLC (Programmable Logic Controller) control and control method thereof |
| WO2014026178A1 (en) * | 2012-08-10 | 2014-02-13 | Texas Instruments Incorporated | Switched mode assisted linear regulator |
| CN106059444A (en) * | 2016-07-29 | 2016-10-26 | 浙江陀曼智造科技有限公司 | Synchronous feeding energy-saving circuit |
| CN107069935A (en) * | 2017-03-28 | 2017-08-18 | 核工业理化工程研究院 | The power switching device controlled based on PLC |
| CN210958140U (en) * | 2019-12-25 | 2020-07-07 | 核工业理化工程研究院 | Dynamic switching device for remote control frequency converter |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113410848A (en) * | 2021-05-24 | 2021-09-17 | 核工业理化工程研究院 | Touch reactive power compensation device |
| CN114374353A (en) * | 2021-12-28 | 2022-04-19 | 佛山市德力泰科技有限公司 | Automatic and efficient switching method for kiln transmission standby frequency converter |
| CN114374353B (en) * | 2021-12-28 | 2023-10-31 | 佛山市德力泰科技有限公司 | Automatic and efficient switching method for kiln transmission standby frequency converter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110868056A (en) | Dynamic switching device for remote control frequency converter | |
| CN117246178A (en) | DC charging pile power distribution one-in four-out switch module device and control method | |
| CN210958140U (en) | Dynamic switching device for remote control frequency converter | |
| CN112072741B (en) | Method and device for realizing one-key starting of household energy storage system | |
| CN220252067U (en) | Test system for low-voltage electric device | |
| CN211918407U (en) | One-inlet four-outlet switch module device for power distribution of direct current charging pile | |
| CN214151440U (en) | Device for controlling signal switching of rectifying device | |
| CN212085879U (en) | Automatic change-over switch electric appliance | |
| CN111404258A (en) | Automatic change-over switch electric appliance | |
| CN220874850U (en) | Bottom plate for fusion monitoring terminal | |
| CN111105945B (en) | Control system for direct current switch cabinet | |
| CN207637711U (en) | Control relay circuit and system | |
| CN216956762U (en) | PLC detection circuit of remote control change-over switch | |
| RU115970U1 (en) | DEVICE FOR MONITORING AND CONTROL OF SIGNALS OF RELAY PROTECTION AND EMERGENCY AUTOMATION | |
| CN219960927U (en) | PCB connector signal board | |
| CN221224977U (en) | Combined junction box capable of automatically realizing open-circuit and short-circuit electric energy metering | |
| CN112018864A (en) | Multi-power switching control system and control method | |
| CN217548465U (en) | Operating bed system and medical equipment | |
| CN218470923U (en) | Breaker state detection device and breaker | |
| CN219448904U (en) | Elevator control cabinet detection equipment and system | |
| CN215734073U (en) | Direct current motor positive and negative rotation driving module and system with load monitoring function | |
| CN214378190U (en) | Opening and closing operation device for multi-type circuit breaker | |
| CN217718036U (en) | Testing device for safety power supply | |
| CN218040903U (en) | Marine dual-power switching control system | |
| CN213268124U (en) | Emergency starting device for water supply non-negative pressure equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |