CN203722334U - Device for restarting motor after power failure - Google Patents
Device for restarting motor after power failure Download PDFInfo
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- CN203722334U CN203722334U CN201420114366.7U CN201420114366U CN203722334U CN 203722334 U CN203722334 U CN 203722334U CN 201420114366 U CN201420114366 U CN 201420114366U CN 203722334 U CN203722334 U CN 203722334U
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- 238000005259 measurement Methods 0.000 claims description 69
- 230000001681 protective effect Effects 0.000 claims description 69
- 230000005611 electricity Effects 0.000 claims description 53
- 230000004069 differentiation Effects 0.000 claims description 24
- 238000011084 recovery Methods 0.000 abstract description 4
- 230000001012 protector Effects 0.000 abstract 3
- 238000010586 diagram Methods 0.000 description 5
- 238000004804 winding Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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Abstract
The utility model provides a device for restarting a motor after power failure. The device comprises a first detector, a first input device and a first trigger. When a diesel generator supplies power to a bus of the motor, the first detector detects the starting duration of the diesel generator; the bus is connected with a first power supply, a second power supply and the diesel generator; and when the first and second power supplies are both in power failure, the diesel generator supplies power to the bus. The first restart discriminating duration, which is longer than or equivalent to the starting duration of the diesel generator, of a motor measuring and controlling protector is input via the first input device. The first trigger emits a motor restarting instruction when the motor measuring and controlling protector detects that the voltage of the bus is recovered to a rated voltage within the first restart discriminating duration. According to the utility model, the motor measuring and controlling protector can more successfully detect voltage recovery of the bus, and the success rate of restarting the motor after power failure is improved.
Description
Technical field
The utility model relates to motor technology field, the device that particularly a kind of motor dead electricity restarts.
Background technology
At present, known motor restarts scheme for using separately measurement and control of motor protective device.After the stoppage in transit of motor dead electricity, motor place busbar voltage are recovered again, measurement and control of motor protective device sends enabled instruction again, restarts motor, makes motor enter run mode.For power plant or other, there is the unit of important rotary machine load, also configure power transfer device and diesel engine generator, after guaranteeing that outer power supply loses, can rely on power transfer device to carry out the power supply of electrical source exchange and diesel engine generator, the power supply of recovery to motor, guarantees that it restarts.But; because China Diesel generator, measurement and control of motor protective device are of a great variety, Various Functions; make in many cases; measurement and control of motor protective device can not detect the recovery of voltage on bus exactly; caused measurement and control of motor protective device can not send out accurately, reliably restart instruction; and then generator restart function can not or not exclusively can realize, cause motor to restart the phenomenon that success rate is low.
Utility model content
The device that the utility model embodiment provides a kind of motor dead electricity to restart, has solved the low technical problem of the success rate that in prior art, motor dead electricity restarts.
The device that the utility model embodiment provides a kind of motor dead electricity to restart, this device comprises: the first checkout equipment, while providing power supply for the bus that is motor place at diesel engine generator, detect the starting duration of described diesel engine generator, wherein, described bus connects the first power supply, second source and described diesel engine generator, when described the first power supply and the equal dead electricity of second source, by described diesel engine generator, provides power supply for described bus; The first input equipment, be connected with the first checkout equipment, for inputting first of measurement and control of motor protective device, restart differentiation duration, wherein, this first restarts and differentiates duration and refer to that take moment of described the first power supply and the equal dead electricity of described second source is starting point, described measurement and control of motor protective device powers on and compresses into the default duration that row detects described bus, and described first restarts the starting duration that differentiation duration is more than or equal to described diesel engine generator; The first trigger equipment, is connected with the first input equipment, for triggering described measurement and control of motor protective device, described first, restarts when differentiating the voltage detecting in duration on described bus and reverting to rated voltage, sends motor restart instruction.
In one embodiment, described the first checkout equipment comprises: one of timer, transducer or combination.
In one embodiment, described the first input equipment comprises: one of keyboard, mouse or combination.
In one embodiment, described the first trigger equipment comprises: trigger.
In one embodiment, also comprise: the second checkout equipment, after described motor dead electricity, detects the current voltage value on described bus; The second input equipment, for inputting the under-voltage protection value of described diesel engine generator, wherein, described under-voltage protection value is than low the first predetermined threshold value of described current voltage value.
In one embodiment, described the second checkout equipment comprises: one of voltameter, electric energy meter, transducer or combination.
In one embodiment, also comprise: the 3rd checkout equipment, while providing power supply for the bus that is motor place when described the first power supply or described second source, detect second of described measurement and control of motor protective device and restart differentiation duration, wherein, this second restarts and differentiates duration and refer to that take moment of described the first power supply or described second source dead electricity is starting point, and described measurement and control of motor protective device powers on and compresses into the default duration that row detects described bus; The 3rd input equipment, the second switch mode that restarts length the second predetermined threshold value while differentiating described in required time length ratio when described the first power supply and described second source are switched for input power switching device shifter.
In one embodiment, also comprise: judgment device, the current voltage value that is used for judging described bus is lower than 300 volts, and when dead electricity duration is less than or equal to 30 seconds, and/or the gate out switch of described diesel engine generator is when close a floodgate, output triggers remote controllers and to described measurement and control of motor protective device, sends the signal that restarts indication; The second trigger equipment, for triggering described measurement and control of motor protective device when restarting indication described in receiving, sends described restart instruction.
In one embodiment, described the first judgment device and described the second judgment device are comparators.
In the utility model embodiment, the bus at motor place connects the first power supply, the first power supply and diesel engine generator, when described the first power supply and the equal dead electricity of second source, by described diesel engine generator, provide power supply for described bus, after motor dead electricity, when the bus that is motor place by diesel engine generator provides power supply, the first checkout equipment first detects the starting duration of this diesel engine generator, first of the first input equipment input measurement and control of motor protective device restarts differentiation duration, described first restarts the starting duration that differentiation duration is more than or equal to described diesel engine generator, the first trigger equipment triggers described measurement and control of motor protective device described when restarting the voltage detecting in the differentiation time on described bus and reverting to rated voltage, send motor restart instruction, guarantee that like this diesel engine generator is at first of measurement and control of motor protective device, to restart to differentiate in duration to complete startup, having improved measurement and control of motor protective device restarts to differentiate first and the success rate that voltage on bus reverts to rated voltage in duration, detected, avoid before diesel engine generator starts, measurement and control of motor protective device restarts first the voltage can't detect on bus in differentiation duration and recovers, the phenomenon that restarts failure causing, and then improved measurement and control of motor protective device and sent out the accurate of restart instruction, reliability, thereby improved the success rate that motor dead electricity restarts.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, forms the application's a part, does not form restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structured flowchart of the device that restarts of a kind of motor dead electricity that the utility model embodiment provides;
Fig. 2 is the power loop winding diagram of a kind of motor of providing of the utility model embodiment;
Fig. 3 is the winding diagram of a kind of motor of providing of the utility model embodiment;
Fig. 4 is the logic diagram that a kind of triggering that the utility model embodiment provides restarts indication.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with execution mode and accompanying drawing, the utility model is described in further details.At this, exemplary embodiment of the present utility model and explanation thereof are used for explaining the utility model, but not as to restriction of the present utility model.
In the prior art, diesel engine generator, measurement and control of motor protective device is of a great variety, Various Functions, owing to may adopting dissimilar diesel engine generator, it is bussed supply, the starting duration of dissimilar diesel engine generator is different, first of measurement and control of motor protective device restarts differentiates the starting duration that duration may be less than diesel engine generator, this first restarts and differentiates duration and refer to that take moment of described the first power supply and the equal dead electricity of described second source is starting point, described measurement and control of motor protective device powers on and compresses into the default duration that row detects described bus, make before diesel engine generator starts, measurement and control of motor protective device restarts first the voltage can't detect on bus in differentiation duration and recovers, and then make measurement and control of motor protective device the recovery of voltage on bus can not be detected exactly, occur that motor restarts failure.In view of this, the utility model embodiment provides a kind of motor dead electricity to restart device, the starting duration of the diesel engine generator that is bussed supply by detection, according to first of the starting duration input measurement and control of motor protective device of diesel engine generator, restart differentiation duration again, first restarts the starting duration that differentiation duration is more than or equal to diesel engine generator, guarantee that like this diesel engine generator is at first of measurement and control of motor protective device, to restart to differentiate in duration to complete startup, improve measurement and control of motor protective device and the success rate that on bus, voltage recovers detected, thereby improved the success rate that motor dead electricity restarts.
In the utility model embodiment, the device that provides a kind of motor dead electricity to restart, as shown in Figure 1, this device comprises:
The first checkout equipment 101, while providing power supply for the bus that is motor place at diesel engine generator, detect the starting duration of described diesel engine generator, wherein, described bus connects the first power supply, second source and described diesel engine generator, when described the first power supply and the equal dead electricity of described second source, by described diesel engine generator, provide power supply for described bus;
The first input equipment 102, be connected with described the first checkout equipment 101, for inputting first of measurement and control of motor protective device, restart differentiation duration, wherein, this first restarts and differentiates duration and refer to that take moment of described the first power supply and the equal dead electricity of described second source is starting point, described measurement and control of motor protective device powers on and compresses into the default duration that row detects described bus, and described first restarts the starting duration that differentiation duration is more than or equal to described diesel engine generator;
The first trigger equipment 103, is connected with described the first input equipment 102, for triggering described measurement and control of motor protective device, described first, restarts when differentiating the voltage detecting in duration on described bus and reverting to rated voltage, sends motor restart instruction.
Known as shown in Figure 1, in the utility model embodiment, the bus at motor place connects the first power supply, the first power supply and diesel engine generator, when described the first power supply and the equal dead electricity of second source, by described diesel engine generator, provide power supply for described bus, after motor dead electricity, when the bus that is motor place by diesel engine generator provides power supply, the first checkout equipment first detects the starting duration of this diesel engine generator, first of the first input equipment input measurement and control of motor protective device restarts differentiation duration, described first restarts the starting duration that differentiation duration is more than or equal to described diesel engine generator, the first trigger equipment triggers described measurement and control of motor protective device described when restarting the voltage detecting in the differentiation time on described bus and reverting to rated voltage, send motor restart instruction, guarantee that like this diesel engine generator is at first of measurement and control of motor protective device, to restart to differentiate in duration to complete startup, having improved measurement and control of motor protective device restarts to differentiate first and the success rate that voltage on bus reverts to rated voltage in duration, detected, avoid before diesel engine generator starts, measurement and control of motor protective device restarts first the voltage can't detect on bus in differentiation duration and recovers, the phenomenon that restarts failure causing, and then improved measurement and control of motor protective device and sent out the accurate of restart instruction, reliability, thereby improved the success rate that motor dead electricity restarts.
During concrete enforcement, the power loop winding diagram of above-mentioned motor can be Figure 2 shows that example, one section of bus can be powered by three-way power, be that bus connects the first power supply, second source and the 3rd power supply, wherein, the first power supply and second source are civil power 380V, and the 3rd power supply is powered by diesel engine generator, are with some motor under bus.Under normal circumstances, diesel engine generator is in stand-by state, and the first power supply (or second source) is with motor power supply by bus and bus; The situation that occurs motor dead electricity comprises: a kind of: when the first power supply (or second source) fault, power transfer device is switched to power supply second source (or first power supply) automatically, is about 90ms～500ms(millisecond switching time) not etc.; Two kinds: when the first power supply and second source simultaneous faults, power transfer device is switched to power supply the 3rd power supply automatically, simultaneously, give diesel engine generator enabled instruction, diesel engine generator starts after (start-up time is 9～15s approximately), closes diesel engine generator gate out switch, and diesel engine generator is to bussed supply.Under above-mentioned two kinds of failure conditions, bus all can have certain dead electricity time, the motor power supply stall that runs out of steam, if again do not send enabled instruction, motor will keep halted state.
During concrete enforcement, described the first checkout equipment can comprise: one of timer, transducer or combination.
Particularly, described the first input equipment can comprise: one of keyboard, mouse or combination.
Particularly, described the first trigger equipment can comprise: trigger.
During concrete enforcement, in order to improve further the success rate that restarts of motor, in the present embodiment, also comprise: the second checkout equipment, after described motor dead electricity, detects the current voltage value on described bus; The second input equipment, for inputting the under-voltage protection value of described diesel engine generator, wherein, described under-voltage protection value is than low the first predetermined threshold value of described current voltage value, and this first predetermined threshold value can be 8V.For example; when motor restarts; the second checkout equipment detects the current voltage value on described bus; it is the magnitude of voltage after dead electricity, decline; for diesel engine generator can start, be bussed supply smoothly; the under-voltage protection value of the second input equipment input diesel engine generator is lower than current voltage value; if this current magnitude of voltage is 300 volts; the under-voltage protection value of diesel engine generator can be made as 290 volts, and this second input equipment can be one of keyboard, mouse or combination with the first input equipment.
During concrete enforcement, described the second checkout equipment can comprise: one of voltameter, electric energy meter, transducer or combination.
During concrete enforcement, when the bus that is motor place at the first power supply or second source provides power supply, for measurement and control of motor protective device can be effective, the voltage detecting exactly on described bus reverts to rated voltage (the normal power supply voltage on bus, for example, can be 380 volts) phenomenon, in the present embodiment, the 3rd checkout equipment, for detection of second of described measurement and control of motor protective device, restart differentiation duration, this second restarts and differentiates duration and refer to that take moment of described the first power supply or described second source dead electricity is starting point, described measurement and control of motor protective device powers on and compresses into the default duration that row detects described bus, this second restarts and differentiates duration and can restart that to differentiate the time span of duration identical with first, the 3rd input equipment, the second switch mode that restarts length the second predetermined threshold value while differentiating described in required time length ratio when described the first power supply and described second source are switched for input power switching device shifter, the size of this second predetermined threshold value can be determined according to equipment operation condition.For example; switching time between general the first power supply and second source is very short; if the very short time of power transfer device utilization completes the switching between the first power supply and second source; and the voltage on bus also recovers at short notice; to cause measurement and control of motor protective device to can't detect the phenomenon that bus is recovered to voltage by dead electricity like this; and then make measurement and control of motor protective device not send out restart instruction, cause restarting failure.The switch mode of power transfer device comprises: cut soon pattern, withstand voltage pattern, the same period trap mode, residual voltage switch mode and long delay pattern, increase the switching time of these switch modes successively, the 3rd input equipment is restarting after the switch mode of differentiating duration input power switching device shifter according to second, power transfer device switches the first power supply and second source required time and restarts length the second predetermined threshold value while differentiating than second, make after electrical source exchange, guarantee that measurement and control of motor protective device can be accurate, the phenomenon that bus is recovered to voltage by dead electricity detected reliably, the 3rd input equipment can be keyboard with the first input equipment, one of mouse or combination, the 3rd checkout equipment can be timer with the first checkout equipment, one of transducer or combination.
In order to meet different application demand, in the present embodiment, by remote controllers (for example, scattered control system (Distributed Control System, DCS)) realize a distant place and restart motor, for example, can be according to the current voltage value of described bus, the operating condition of described motor, the operating condition of described diesel engine generator, dead electricity duration one of them or combination in any, triggering remote controllers sends and restarts indication to described measurement and control of motor protective device, and trigger described measurement and control of motor protective device when restarting indication described in receiving, send described restart instruction.Particularly: judgment device, the current voltage value that is used for judging described bus is lower than 300 volts, and when dead electricity duration is less than or equal to 30 seconds, and/or the gate out switch of described diesel engine generator is when close a floodgate, output triggers remote controllers and to described measurement and control of motor protective device, sends the signal that restarts indication; The second trigger equipment, is connected with judgment device, for triggering described measurement and control of motor protective device when restarting indication described in receiving, sends described restart instruction.For example, the winding diagram of motor as shown in Figure 3, the terminals U of motor M, V, the live wire L1 of W and three phase mains, L2, L3 connects, N is the zero line of three phase mains, the part of measurement and control of motor protective device KO(as shown in Fig. 3 wire frame) terminals Ua, Ub, Uc is also connected with the live wire of three phase mains, Un is connected with zero line N, KM1 is main noddle on contactor, motor start-up when closed, KM2 is the auxiliary contact of contactor, it is closed when main noddle on contactor is closed, at main noddle on contactor, opening is to open, KM3 is contactor coil, when charged, main noddle on contactor is closed, during dead electricity, main noddle on contactor is opened, 1DO is the instruction contact of measurement and control of motor protective device actuating motor, closed 3s(second during motor start-up), 5DO is the instruction contact that measurement and control of motor protective device stops motor, when stopping, opening by motor 3s.Measurement and control of motor protective device is provided with separately restart function, in the certain hour (this time can revise) detecting after the low and motor of busbar voltage stops, if busbar voltage detected, recovering, and can send out restart instruction, and motor is started again.10DI is the instruction contact that a DCS system distant place restarts motor; receive after this instruction (restarting indication); measurement and control of motor protective device is sent out restart instruction (being closed 1DO); 12DI is the instruction contact that a DCS system distant place stops motor; receive after this instruction, measurement and control of motor protective device is sent out halt instruction (opening 5DO).
Particularly, can be by the current voltage value of bus, the operating condition of described motor, the operating condition of described diesel engine generator, the trigger conditions such as dead electricity duration realize to trigger the form of logic, as shown in Figure 4, the current voltage value of the described bus that judgment device is judged is lower than 300 volts, and described dead electricity duration is less than or equal to the trigger condition that the gate out switch of the trigger condition of 30 seconds and diesel engine generator closes a floodgate and carries out logic OR computing, the operation result S of usining triggers DCS system as the output of judgment device and sends out and restart indication to measurement and control of motor protective device, operation result S can be the form of the pulse equipment measurement and control of motor protective device that sets out, in addition condition, for example, it is within 32 seconds, to carry out logic OR computing higher than 365 volts and duration that diesel engine generator that judgment device is judged starts experiment button, busbar voltage, with operation result R, as the output of judgment device, triggering DCS system sends out and stops restarting indication to measurement and control of motor protective device, measurement and control of motor protective device stops restart instruction according to stopping restarting indication, operation result R can be the form of the pulse equipment measurement and control of motor protective device that sets out, particularly, this judgment device can be comparator.
In the utility model embodiment, the bus at motor place connects the first power supply, the first power supply and diesel engine generator, when described the first power supply and the equal dead electricity of second source, by described diesel engine generator, provide power supply for described bus, after motor dead electricity, when the bus that is motor place by diesel engine generator provides power supply, the first checkout equipment first detects the starting duration of this diesel engine generator, first of the first input equipment input measurement and control of motor protective device restarts differentiation duration, described first restarts the starting duration that differentiation duration is more than or equal to described diesel engine generator, the first trigger equipment triggers described measurement and control of motor protective device described when restarting the voltage detecting in the differentiation time on described bus and reverting to rated voltage, send motor restart instruction, guarantee that like this diesel engine generator is at first of measurement and control of motor protective device, to restart to differentiate in duration to complete startup, having improved measurement and control of motor protective device restarts to differentiate first and the success rate that voltage on bus reverts to rated voltage in duration, detected, avoid before diesel engine generator starts, measurement and control of motor protective device restarts first the voltage can't detect on bus in differentiation duration and recovers, the phenomenon that restarts failure causing, and then improved measurement and control of motor protective device and sent out the accurate of restart instruction, reliability, thereby improved the success rate that motor dead electricity restarts.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model embodiment can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (9)
1. the device that motor dead electricity restarts, is characterized in that, comprising:
The first checkout equipment, while providing power supply for the bus that is motor place at diesel engine generator, detect the starting duration of described diesel engine generator, wherein, described bus connects the first power supply, second source and described diesel engine generator, when described the first power supply and the equal dead electricity of second source, by described diesel engine generator, provide power supply for described bus;
The first input equipment, be connected with described the first checkout equipment, for inputting first of measurement and control of motor protective device, restart differentiation duration, wherein, this first restarts and differentiates duration and refer to that take moment of described the first power supply and the equal dead electricity of described second source is starting point, described measurement and control of motor protective device powers on and compresses into the default duration that row detects described bus, and described first restarts the starting duration that differentiation duration is more than or equal to described diesel engine generator;
The first trigger equipment, is connected with described the first input equipment, for triggering described measurement and control of motor protective device, described first, restarts when differentiating the voltage detecting in duration on described bus and reverting to rated voltage, sends motor restart instruction.
2. the device that motor dead electricity restarts as claimed in claim 1, is characterized in that, described the first checkout equipment comprises: one of timer, transducer or combination.
3. the device that motor dead electricity restarts as claimed in claim 1, is characterized in that, described the first input equipment comprises: one of keyboard, mouse or combination.
4. the device that motor dead electricity restarts as claimed in claim 1, is characterized in that, described the first trigger equipment comprises: trigger.
5. the device that motor dead electricity restarts as described in any one in claim 1 to 4, is characterized in that, also comprises:
The second checkout equipment, after described motor dead electricity, detects the current voltage value on described bus;
The second input equipment, for inputting the under-voltage protection value of described diesel engine generator, wherein, described under-voltage protection value is than low the first predetermined threshold value of described current voltage value.
6. the device that motor dead electricity restarts as claimed in claim 5, is characterized in that, described the second checkout equipment comprises: one of voltameter, electric energy meter, transducer or combination.
7. the device that motor dead electricity restarts as described in any one in claim 1 to 4, is characterized in that, also comprises:
The 3rd checkout equipment, while providing power supply for the bus that is motor place when described the first power supply or described second source, detect second of described measurement and control of motor protective device and restart differentiation duration, wherein, this second restarts and differentiates duration and refer to that take moment of described the first power supply or described second source dead electricity is starting point, and described measurement and control of motor protective device powers on and compresses into the default duration that row detects described bus;
The 3rd input equipment, the second switch mode that restarts length the second predetermined threshold value while differentiating described in required time length ratio when described the first power supply and described second source are switched for input power switching device shifter.
8. the device that motor dead electricity restarts as described in any one in claim 1 to 4, is characterized in that, also comprises:
Judgment device, the current voltage value that is used for judging described bus is lower than 300 volts, and when dead electricity duration is less than or equal to 30 seconds, and/or the gate out switch of described diesel engine generator is when close a floodgate, and output triggers remote controllers and to described measurement and control of motor protective device, sends the signal that restarts indication;
The second trigger equipment, for triggering described measurement and control of motor protective device when restarting indication described in receiving, sends described restart instruction.
9. the device that motor dead electricity restarts as claimed in claim 8, is characterized in that, described judgment device is comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420114366.7U CN203722334U (en) | 2014-03-13 | 2014-03-13 | Device for restarting motor after power failure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420114366.7U CN203722334U (en) | 2014-03-13 | 2014-03-13 | Device for restarting motor after power failure |
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| Publication Number | Publication Date |
|---|---|
| CN203722334U true CN203722334U (en) | 2014-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420114366.7U Expired - Lifetime CN203722334U (en) | 2014-03-13 | 2014-03-13 | Device for restarting motor after power failure |
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| CN (1) | CN203722334U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110995061A (en) * | 2019-11-22 | 2020-04-10 | 中国核电工程有限公司 | Linkage control method for realizing automatic starting of power-off and power-on of motor equipment |
-
2014
- 2014-03-13 CN CN201420114366.7U patent/CN203722334U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110995061A (en) * | 2019-11-22 | 2020-04-10 | 中国核电工程有限公司 | Linkage control method for realizing automatic starting of power-off and power-on of motor equipment |
| CN110995061B (en) * | 2019-11-22 | 2022-09-27 | 中国核电工程有限公司 | Linkage control method for realizing automatic starting of power-off and power-on of motor equipment |
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Granted publication date: 20140716 |