CN104080257B - Public illumination direct current centrally connected power supply dims monitoring system and method - Google Patents
Public illumination direct current centrally connected power supply dims monitoring system and method Download PDFInfo
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Abstract
The present invention relates to power regulation equipment technical field, specifically a kind of public illumination direct current centrally connected power supply dims monitoring system, it is characterized in that being provided with AC/DC conversion module, alternating current power supply detection module, control module, DC source detection module, light-adjusting module and central controller, the present invention is compared with prior art, it is particularly well-suited to public place illumination and uses, reduce the energy consumption of illuminator, improve the service life of light fixture, reduce the regular maintenance cost of illuminator, and illuminator distribution threephase load can be made to equalize.
Description
Technical field:
The present invention relates to power regulation equipment technical field, specifically one and be particularly well-suited to public place illumination
With, reduce the energy consumption of illuminator, improve the service life of light fixture, reduce the regular maintenance cost of illuminator, and photograph can be made
The public illumination direct current centrally connected power supply light modulation monitoring system and method for bright device distribution threephase load equilibrium.
Background technology:
Public illumination such as roadway illumination, park illumination, plaza lighting and office building, auditoriums, hotels common part illumination etc., its
One of maximum as city Midst density, quantity is most public utility, is related to traffic safety and the lives of the people are convenient, and
Become Modern urban landscape and the important component part of common people's daily life.Direct current supply is carried out in public lighting system
Concentrating light modulating device, for energy-saving and emission-reduction, reduce invalid illumination, saves energy has great importance.In general, public photograph
The supply network of bright device is relatively independent, is relatively suitable for the application of direct current supply technology.Compare Alternating Current Power Supply, and direct current supplies
Electricity has many potential advantages, in hgher efficiency, and it is mainly reflected in the following aspects: (1) is at direct current transmission and distribution device
In, the via net loss not caused because of transmission reactive power, the loss also not produced because of kelvin effect, have far below exchange
The line loss of power transmission and distribution；(2) there is no the problems such as frequency stable, reactive power and AC charging electric current；(3) DC distribution net is also
Have that electrical power distribution ability is strong, radius of electricity supply big, can improve the quality of power supply, be easily achieved the advantages such as distributed power source interconnection；(4)
The public lighting device unbalanced problem of common threephase load can be solved.
It addition, along with LED light source technology is the most ripe, LED lamp application is more and more extensive.But LED lamp power supply drives
The service life of dynamic part far below the service life of LED light source itself, be almost its 1/2 to 1/3.As a example by LED street lamp,
The fault more than 90% of LED lamp occurs at power supply driver AC/DC conversion portion.
Public illumination is widely present excess illumination at present and illuminates the phenomenon that ineffective energy consumption is big.Often the dead of night, quilt
Illumination place is empty, the most brilliantly illuminated, wastes a large amount of electric energy.As a example by city illumination, for this situation, very
Many places are all in " evening lamp, bright every the small cup " pattern of execution, but this measure causes road surface brightness irregularities, easily causes people's vision tired
Labor, induction accident, also run counter to existing roadway illumination code requirement.
Summary of the invention:
The problem that current public lighting device is existed by the present invention, propose one be particularly well-suited to public place illumination with,
Reduce the energy consumption of illuminator, improve the service life of light fixture, reduce the regular maintenance cost of illuminator, and illumination can be made to fill
Put the public illumination direct current centrally connected power supply light modulation monitoring system and method for distribution threephase load equilibrium.
The present invention adopts the following technical scheme that and reaches:
A kind of public illumination direct current centrally connected power supply dims monitoring system, it is characterised in that be provided with AC/DC conversion module, friendship
Stream power detecting module, control module, DC source detection module, light-adjusting module, communication module and central controller, wherein
The input of AC/DC conversion module is connected with outside three-phase alternating-current supply input branch road, and outfan is straight through direct current output branch road
Current load is powered, and is provided with at least one AC/DC changer in AC/DC conversion module, AC/DC changer by the way of bus with
Central controller is connected；
For detecting the signals collecting end of the alternating current power supply detection module of the input AC electrical quantity of AC/DC conversion module
Input the A.C. contactor on branch road with the alternating current power supply of AC/DC conversion module and AC current transformer be connected, and with in
Centre controller is connected；
For receiving the instruction of central controller and controlling the control module of peripheral circuit duty, convert with AC/DC
The control coil of module input/output terminal catalyst connects, and is connected with central processing unit；
For detecting DC source detection module and the direct current output of AC/DC conversion module output unidirectional current relevant parameter
D.C. contactor and DC current transformer on road connect, and are connected with central controller；
The instruction of system, and outwardly appointing system or equipment (such as Surveillance center's clothes are sent to for receiving the external world
Business device, designated mobile phone etc.) communication module of data of the real-time status of transmission system and detection, it is connected with central controller；
For producing dimming commands and being sent to the light-adjusting module of dimmable load, logically, tunable optical upper with load
Driver connects, and is connected with central controller；
The instruction of system, and outwardly appointing system or equipment (such as Surveillance center's clothes are sent to for receiving the external world
Business device, designated mobile phone etc.) transmission system real-time status and detection data communication module, be connected with central controller；
For coordinating the collaborative work of various parts, it is achieved the central controller of systemic-function and AD/DC conversion module
Connect, alternating current power supply detection module connects, control module connects, DC source detection module connects, light-adjusting module connects, communication
Module connects；
A kind of public illumination direct current centrally connected power supply and light modulation monitoring method, it is characterised in that comprise the following steps:
Step 1: system electrification, is in holding state.
Step 2: under system standby state, by alternating current power supply detection module and DC source detection module monitoring light system
System state is the most normal, if normally, performs next step, if abnormal, then sends failure alarm signal, and failure alarm signal
Also should be published to extraneous appointing system or equipment by communication module in real time；
Step 3: whether system monitoring turns on light order, if not having, then system continues to keep holding state, if turning on light life
Order, then perform next step.Order of turning on light is to be met pre-set condition of turning on light by system to produce；
Step 4: system sends A.C. contactor adhesive order by control module, controls the friendship of alternating current power supply input branch road
Stream catalyst adhesive, makes alternating current power supply feed AC/DC modular converter, and performs next step；
Step 5: the system PORT COM by AC/DC modular converter, monitoring AC/DC modular converter work is the most normal,
If normal, performing next step, if abnormal, control module turns off A.C. contactor, and stop turning on light program, and be concurrently out of order report
Warn signal, and failure alarm signal also should be published to extraneous appointing system or equipment by communication module in real time；
Step 6: system sends D.C. contactor adhesive order by control module, makes DC source output branch road conducting,
And perform next step；
Step 7: load electric, bright light is run, and is performed next step；
Step 8: system, under bright light running status, is monitored by alternating current power supply detection module and DC source detection module
Bright light running status is the most normal, if normally, performs next step, if abnormal, then system is according to abnormality classification
Difference, is correspondingly processed according to pre-set program, is simultaneously emitted by failure alarm signal, and failure alarm signal also should
It is published to extraneous appointing system or equipment in real time by communication module；
Step 9: whether system monitoring has dimmer command, if having, then performs next step, if not having, then performs step 12；
Dimmer command can be that program presets, it is possible to is external command.
Step 10: system sends the dim signal tunable optical driver to load by light-adjusting module, and performs next step
Suddenly；Load tunable optical driver, according to the dim signal received, regulation output electric current, controls the output of lamp load,
Reach the purpose of light modulation；
Step 11: system, by monitoring dimmer command implementation status such as DC source detection modules, if executed, then returns to
Step 7, if being not carried out, or performs abnormal, then send failure alarm signal, and failure alarm signal also should be in real time by logical
News module is published to extraneous appointing system or equipment；
Step 12: whether system monitoring turns off the light order, if having, then performing next step, if not having, then returning to step
Seven；Order of turning off the light can be that program presets, it is possible to is external command；
Step 13: system is sent by control module and disconnects D.C. contactor order, controls D.C. contactor and turns off, system
Turn off the light, time delay, perform next step；
Step 14: system is sent by control module and disconnects A.C. contactor order, controls A.C. contactor and disconnects, system
Come back to step 1 holding state.
The application of the present invention, has the advantage that (1) can reduce the energy consumption of illuminator.The present invention passes through two ways
Footpath reduces illuminator energy consumption, and one is the electric energy loss being reduced transmission of electricity link by direct current centrally connected power supply；Two is according to reality
Illumination needs, and utilizes that the present invention is on-demand to be dimmed lamp load, saves energy；(2) service life of light fixture is improved.Due to
Flimsy AC/DC parts concentrate on AC/DC and convert control module, and light fixture drives the life-span of power supply significantly to be carried
Height, thus improve the service life of light fixture；(3) the regular maintenance cost of illuminator is reduced.Due to the raising of lamp life, shine
The maintenance of bright device is greatly reduced, thus reduces the regular maintenance cost of public lighting device；(4) additionally illumination also can be made to fill
Put distribution threephase load balance.The present invention can reduce the pollution to AC network with equilibrium assignment threephase load.
Accompanying drawing illustrates:
Accompanying drawing 1 is the structured flowchart of the present invention.
Accompanying drawing 2 is one embodiment of the present invention system diagram.
Accompanying drawing 3 is workflow diagram of the present invention
Reference: AC/DC conversion module 1, alternating current power supply detection module 2, control module 3, DC source detection module
4, light-adjusting module 5 and central controller 6, communication module 7, AC/DC changer 8.
Detailed description of the invention:
The present invention is further illustrated with embodiment below in conjunction with the accompanying drawings.
As shown in accompanying drawing 1 and accompanying drawing 2, the present invention proposes a kind of public illumination direct current centrally connected power supply light modulation monitoring and is
System, it is characterised in that be provided with AC/DC conversion module 1, alternating current power supply detection module 2, control module 3, DC source detection module
4, light-adjusting module 5 and central controller 6, communication module 7, the wherein input of AC/DC conversion module 1 and outside three-phase alternating current
Power supply is connected, and outfan is that DC load is powered through direct current cables, is provided with at least one AC/DC and becomes in AC/DC conversion module 1
Parallel operation, being connected with central controller 6 by the way of bus of AC/DC changer 8；
For detecting the signals collecting end of the alternating current power supply detection module 2 of the input AC electrical quantity of AC/DC conversion module 1
Input the A.C. contactor on branch road with the alternating current power supply of AC/DC conversion module 1 and AC current transformer is connected, and with
Central controller 6 is connected；
For receiving the instruction of central controller 6 and controlling the control module 3 of peripheral circuit duty, become with AC/DC
The control coil of die change block 1 input/output terminal catalyst connects, and is connected with central processing unit 6；
The DC source detection module 4 exporting unidirectional current relevant parameter for detecting AC/DC conversion module 1 exports with direct current
D.C. contactor and DC current transformer on branch road connect, and are connected with central controller 6；
For producing dimming commands and being sent to the light-adjusting module 5 of dimmable load, it is connected with central controller 6；
The instruction of system, and outwardly appointing system or equipment (such as Surveillance center's clothes are sent to for receiving the external world
Business device, designated mobile phone etc.) real-time status of transmission system and the communication module 7 of detection data, it is connected 6 with central controller；
For coordinating the collaborative work of various parts, it is achieved central controller 6 and the AD/DC conversion module of systemic-function
1 connect, alternating current power supply detection module 2 connects, control module 3 connects, DC source detection module 4 connects, light-adjusting module 5 even
Connect, communication module 7 connects；
Embodiment:
As shown in Figure 2, a concrete application case of the present invention is given, it is characterised in that be provided with a road exchange input
Branch road, four road direct current output branch roads, and application the present invention is directed to the monitoring system that present case is arranged.
Exchange input branch road is provided with circuit breaker Q F, D.C mutual-inductor TA/TB/TC, A.C. contactor KM.The three of extraneous introducing
Cross streams power supply L1/L2/L3 connects the present invention respectively hand over through circuit breaker Q F, D.C mutual-inductor TA/TB/TC, A.C. contactor KM
Stream input terminal U/V/W.
Direct current output branch road is provided with dc bus DC+/DC-, D.C. contactor DKM1/DKM2/DKM3/DKM4, Yi Jizhi
Stream current transformer DTA1/DTA2/DTA3/DTA4.Dc bus DC+/DC-is connected with direct current of the present invention output OUT+/OUT-,
D.C. contactor DKM1/DKM2/DKM3/DKM4 input is connected with dc bus DC+/DC-, and outfan is mutual through DC current
Sensor DTA1/DTA2/DTA3/DTA4 exports.
In application case shown in accompanying drawing 2, monitoring system be again provided with AC/DC conversion module, alternating current power supply detection module,
Control module, DC source detection module, light-adjusting module, communication module and central controller, wherein
AC/DC conversion module is provided with three AC/DC changers, the three-phase input end U/V/W on changer and supervising device
AC input terminal connects, and outfan OUT+/OUT-is connected with the DC output terminal of supervising device.Leading to of AC/DC changer
News port interconnects in the way of bus, and is connected with central controller, and central controller is by monitoring bus AC/DC changer
Run.
Alternating current power supply detection module is provided with alternating voltage detection terminal Ua/Ub/Uc, alternating current detection terminal (Ia1,
Ia2)/(Ib1, Ib2)/(Ic1, Ic2), and A.C. contactor status detection terminal KM.Ua/Ub/Uc respectively with the three-phase of QF
Output connects, and (Ia1, Ia2)/(Ib1, Ib2)/(Ic1, Ic2) is connected with the secondary port of TA/TB/TC respectively, detection exchange
The size of current of input branch road；Terminal KM connects the auxiliary contact of A.C. contactor, the state of detection catalyst.
Control module is provided with exchange input branch road and controls port K, and direct current output branch road controls port DK1/DK2/DK3/
DK4.K is connected with the control coil of the A.C. contactor KM of exchange input branch road, controls the adhesive/disconnection of KM；DK1/DK2/
The control coil of the D.C. contactor DKM1/DKM2/DKM3/DKM4 that DK3/DK4 exports branch road with direct current respectively is connected, and controls
Adhesive/the disconnection of D.C. contactor.
DC source detection module be provided with direct current detection terminal (DI11, DI12)/(DI21, DI22)/(DI31,
DI32)/(DI41, DI42), and D.C. contactor status detection terminal DKM1/DKM2/DKM3/DKM4.(DI11、DI12)/
(DI21, DI22)/(DI31, DI32)/(DI41, DI42) and the DC current transformer DTA1/DTA2/ on direct current output branch road
The secondary port of DTA3/DTA4 connects, the size of current of detection direct current output branch road；Terminal DKM1/DKM2/DKM3/DKM4
It is connected with the D.C. contactor auxiliary contact on the road of direct current output respectively, the state of detection D.C. contactor.
Light-adjusting module is connected with central controller, receives the instruction of central controller, produces dim signal, is sent to adjustable
Light lamp load.
Communication module is connected with central controller, receives the external world and transmits the instruction of coming, and outwardly appointing system or set
The real-time status of standby (such as monitoring central server, designated mobile phone etc.) transmission system and detection data.
Central controller AD/DC conversion module connects, alternating current power supply detection module connects, control module connects, unidirectional current
Source detection module connects, light-adjusting module connects, communication module connects；With the collaborative work for coordinating various parts, it is achieved
Systemic-function.
As shown in Figure 3, the direct current centrally connected power supply in this application case and light modulation monitoring method, it is characterised in that include
Following steps:
Step 1: system electrification, is in holding state.
Step 2: under system standby state, by the voltage detection terminal Ua/Ub/Uc of alternating current power supply detection module, electric current
Detection terminal (Ia1, Ia2)/(Ib1, Ib2)/(Ic1, Ic2) detects respectively with A.C. contactor status detection terminal KM and exchanges
The most normal (the being zero)/A.C. contactor of voltage whether normal/electric current is the most normal (disconnection)；By DC source detection module
Direct current detection terminal (DI11, DI12)/(DI21, DI22)/(DI31, DI32)/(DI41, DI42) and D.C. contactor
Whether the most normal (the being zero)/D.C. contactor of status detection terminal DKM1/DKM2/DKM3/DKM4 detection direct current branch electric current
Normally (disconnect)；If normal, perform next step, if abnormal, then send failure alarm signal, and event according to abnormal contents
Barrier alarm signal is published to extraneous appointing system or equipment by communication module the most in real time；
Step 3: whether system monitoring turns on light order, if not having, then system continues to keep holding state, if turning on light life
Order, then perform next step.Order of turning on light is to be met pre-set condition of turning on light by system to produce；
Step 4: system sends A.C. contactor adhesive order by the K terminal of control module, controls alternating current power supply input
The A.C. contactor KM adhesive of branch road, makes alternating current power supply feed AC/DC modular converter, and AC/DC modular converter is started working, and held
Row next step；
Step 5: the system PORT COM by AC/DC modular converter, monitoring AC/DC modular converter work is the most normal,
If normal, performing next step, if abnormal, control module turns off A.C. contactor by terminal K, and stop turning on light program, and
Send failure alarm signal, and failure alarm signal also should be published to extraneous appointing system or equipment by communication module in real time；
Step 6: system sends D.C. contactor DKM1/DKM2/ by control module DK1/DK2/DK3/DK4 terminal
DKM3/DKM4 adhesive order, makes DC source output branch road conducting, and performs next step；
Step 7: load electric, bright light is run, and is performed next step；
Step 8: system is under bright light running status, by the voltage detection terminal Ua/Ub/ of alternating current power supply detection module
Uc, current sense terminal (Ia1, Ia2)/(Ib1, Ib2)/(Ic1, Ic2) and A.C. contactor status detection terminal KM examine respectively
Survey alternating voltage the most normal (the operating current)/A.C. contactor of whether normal/electric current the most normal (Guan Bi)；And by straight
Direct current detection terminal (DI11, DI12)/(DI21, DI22)/(DI31, DI32) of stream power detecting module/(DI41,
DI42) the most normally (work with D.C. contactor status detection terminal DKM1/DKM2/DKM3/DKM4 detection direct current branch electric current
Electric current)/D.C. contactor is the most normally (Guan Bi)；Monitor bright light running status the most normal, if normally, perform next step
Suddenly, if abnormal, then system is according to abnormal contents, is correspondingly processed according to pre-set program, is simultaneously emitted by event
Hinder alarm signal, and failure alarm signal also should be published to extraneous appointing system or equipment by communication module in real time；
Step 9: whether system monitoring has dimmer command, if having, then performs next step, if not having, then performs step 12；
Dimmer command can be that program presets, it is possible to is external command.
Step 10: system sends the dim signal tunable optical driver to load by light-adjusting module, and performs next step
Suddenly；Load tunable optical driver, according to the dim signal received, regulation output electric current, controls the output of lamp load,
Reach the purpose of light modulation；
Step 11: system passes through the direct current detection terminal of DC source detection module by DC source detection module
The most normal (the light modulation of (DI11, DI12)/(DI21, DI22)/(DI31, DI32)/(DI41, DI42) detection direct current branch electric current
Electric current), monitor dimmer command implementation status, if normally, then return to step 7, if abnormal, then send failure alarm signal, and
Failure alarm signal also should be published to extraneous appointing system or equipment by communication module in real time；
Step 12: whether system monitoring turns off the light order, if having, then performing next step, if not having, then returning to step
Seven；Order of turning off the light can be that program presets, it is possible to is external command；
Step 13: system is sent by the DK1/DK2/DK3/DK4 terminal of control module and disconnects D.C. contactor order, control
D.C. contactor DKM1/DKM2/DKM3/DKM4 processed turns off, and system is turned off the light, time delay, performs next step；
Step 14: system is sent by control module K terminal and disconnects A.C. contactor order, controls A.C. contactor KM and breaks
Opening, system comes back to step 1 holding state.
The present invention compared with prior art, has the advantage that (1) reduces the energy consumption of illuminator.The present invention passes through two
Individual approach reduces illuminator energy consumption, and one is the electric energy loss being reduced transmission of electricity link by direct current supply；Two is according to reality
Illumination needs, and utilizes that the present invention is on-demand carries out switch lamp and brightness adjustment control, saves energy to light fixture；(2) use of light fixture is improved
Life-span.Converting control unit owing to flimsy AC/DC parts concentrate on AC/DC, light fixture drives the life-span of power supply to obtain
Increase substantially, thus improve the service life of light fixture；(3) the regular maintenance cost of illuminator is reduced.Due to lamp life
Raising, the maintenance of illuminator is greatly reduced, thus reduces the regular maintenance cost of public lighting device；(4) additionally also
Illuminator distribution threephase load can be made to balance.The present invention can reduce the pollution to AC network with equilibrium assignment threephase load.
Claims (1)
1. the public illumination using method of direct current centrally connected power supply light modulation monitoring system, it is characterised in that described public illumination
It is provided with AC/DC conversion module, alternating current power supply detection module, control module, unidirectional current by direct current centrally connected power supply light modulation monitoring system
Source detection module, light-adjusting module, communication module and central controller, the wherein input of AC/DC conversion module and outside three
Cross streams power supply input branch road is connected, and outfan is that DC load is powered through direct current output branch road, sets in AC/DC conversion module
Having at least one AC/DC changer, AC/DC changer is connected with central controller by the way of bus；For detecting AC/
The signals collecting end of alternating current power supply detection module of the input AC electrical quantity of DC conversion module and exchanging of AC/DC conversion module
A.C. contactor and AC current transformer on power supply input branch road connect, and are connected with central controller；For connecing
Receive the instruction of central controller and control the control module of peripheral circuit duty, with AC/DC conversion module input/output terminal
The control coil of catalyst connects, and is connected with central controller；It is correlated with for detecting AC/DC conversion module output unidirectional current
The DC source detection module of parameter is connected with the D.C. contactor on described direct current output branch road and DC current transformer,
And be connected with central controller；For producing dimming commands and being sent to the light-adjusting module of dimmable load, logically, with negative
In load, tunable optical driver connects, and is connected with central controller；The instruction of system is sent to for receiving the external world, and outwards
Boundary's appointing system or the real-time status of equipment transmission system and the communication module of detection data, be connected with central controller；With
In the collaborative work coordinating various parts, it is achieved the central controller of systemic-function is connected with AD/DC conversion module, alternating current
Source detection module connects, control module connects, DC source detection module connects, light-adjusting module connects, communication module connects；
This system is arranged in illumination control chamber, switch board or case change；
The using method of described public illumination direct current centrally connected power supply light modulation monitoring system comprises the following steps: step 1: in system
Electricity, is in holding state；
Step 2: under system standby state, by alternating current power supply detection module and DC source detection module monitoring light system shape
State is the most normal, if normally, performs next step, if abnormal, then sends failure alarm signal, and failure alarm signal also should
It is published to extraneous appointing system or equipment in real time by communication module；
Step 3: whether system monitoring turns on light order, if not having, then system continues to keep holding state, if turning on light order,
Then performing next step, order of turning on light is to be met pre-set condition of turning on light by system to produce；
Step 4: system sends A.C. contactor adhesive order by control module, the exchange controlling alternating current power supply input branch road connects
Tentaculum adhesive, makes alternating current power supply feed AC/DC modular converter, and performs next step；
Step 5: the system PORT COM by AC/DC modular converter, monitoring AC/DC modular converter work is the most normal, if just
Often, performing next step, if abnormal, control module turns off A.C. contactor, and stop turning on light program, and be concurrently out of order alarm signal
Number, and failure alarm signal also should be published to extraneous appointing system or equipment by communication module in real time；
Step 6: system sends D.C. contactor adhesive order by control module, makes DC source output branch road conducting, and holds
Row next step；
Step 7: load electric, bright light is run, and is performed next step；
Step 8: system, under bright light running status, monitors bright light by alternating current power supply detection module and DC source detection module
Running status is the most normal, if normally, performs next step, if abnormal, then system is according to the difference of abnormality classification,
It is correspondingly processed according to pre-set program, is simultaneously emitted by failure alarm signal, and failure alarm signal also should be real-time
It is published to extraneous appointing system or equipment by communication module；
Step 9: whether system monitoring has dimmer command, if having, then performs next step, if not having, then performs step 12；Light modulation
Order is that program presets or external command；
Step 10: system sends the dim signal tunable optical driver to load by light-adjusting module, and performs next step；Negative
Carry tunable optical driver and export electric current according to the dim signal received, regulation, control the output of lamp load, reach to adjust
The purpose of light；
Step 11: system monitors dimmer command implementation status by DC source detection module, if executed, then returns to step 7,
If being not carried out, or perform abnormal, then send failure alarm signal, and failure alarm signal also should pass through communication module in real time
It is published to extraneous appointing system or equipment；
Step 12: whether system monitoring turns off the light order, if having, then performing next step, if not having, then returning to step 7；
Order of turning off the light is that program presets or external command；
Step 13: system is sent by control module and disconnects D.C. contactor order, controls D.C. contactor and turns off, and system is gone out
Lamp, time delay, perform next step；
Step 14: system is sent by control module and disconnects A.C. contactor order, controls A.C. contactor and disconnects, and system is again
Return to step 1 holding state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410334879.3A CN104080257B (en) | 2014-07-15 | 2014-07-15 | Public illumination direct current centrally connected power supply dims monitoring system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410334879.3A CN104080257B (en) | 2014-07-15 | 2014-07-15 | Public illumination direct current centrally connected power supply dims monitoring system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104080257A CN104080257A (en) | 2014-10-01 |
| CN104080257B true CN104080257B (en) | 2016-08-17 |
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| CN104333233A (en) * | 2014-10-23 | 2015-02-04 | 苏州市吴中区大陆电子设备厂 | Power distribution circuit for transformer |
| CN104332952A (en) * | 2014-10-23 | 2015-02-04 | 苏州市吴中区大陆电子设备厂 | Power distribution system for transformer |
| CN107454725B (en) * | 2017-09-27 | 2023-08-04 | 中船第九设计研究院工程有限公司 | Modularized light environment system for ship cabin |
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| CN2393847Y (en) * | 1999-08-20 | 2000-08-30 | 武汉市青山机电厂 | Low frequency drive controller for digital high voltage hoist |
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