CN102035195B - Automatic ground protective device for light rail garage power and control method thereof - Google Patents
Automatic ground protective device for light rail garage power and control method thereof Download PDFInfo
- Publication number
- CN102035195B CN102035195B CN201010272726.2A CN201010272726A CN102035195B CN 102035195 B CN102035195 B CN 102035195B CN 201010272726 A CN201010272726 A CN 201010272726A CN 102035195 B CN102035195 B CN 102035195B
- Authority
- CN
- China
- Prior art keywords
- switch
- cpu
- supply lines
- control
- alarm
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses an automatic ground protective device for a light rail garage power and a control method thereof. The invention is characterized in that a central processing unit (CPU) receives the control instructions transmitted by a control box, and processes the control instructions. When executing a power-down instruction, the CPU takes control to turn off an electric switch K1 on a supply line and close a discharge resistance switch K3, and an alarm unit provides an alarm. At the same time the CPU receives a voltage signal sent back by a power supply line voltage signal detection unit in real time and judges whether the voltage indicated by the voltage signal is greater than a set threshold. If the voltage is greater than the set threshold, the state is not changed; if the voltage is smaller than the set threshold, a ground switch K2 is controlled to be closed and the alarm unit is controlled to stop alarming. When executing a power-on instruction, the CPU controls the alarm unit to send out an alarm, and the ground switch K2 and the discharge resistance switch K3 are switched off, and then the electric switch K1 on the supply line is closed. The device and the method are simple to operate, have the advantages of high degree of automation, the function of automatic power-on alarm, and wide application value.
Description
Technical field
The present invention relates to a kind of automatic ground protective device for light rail garage power and control method.
Background technology
The power supply of light rail car is generally direct current 750V---1500V, single line power supply, and supply line is above light rail car, and light rail car is by pantograph and supply line's contact electricity getting, and rail is used for current circuit as ground wire.Light-track vehicle garage being parked and overhauling for light rail car, has the independent power supply of controlling, and can carry out flexibly power-on and power-off control, is convenient to the maintenance of vehicle.When vehicle roof equipment is overhauled, must be to electricity under supply line, Bing Jiang supply line carries out ground connection, even if supply lines is misused or other reasons powers on again like this, earth connection also can be introduced the earth by electric current, the large electric current producing also can allow power supply tripping operation, encounters the electric shock accidents that supply lines and other electric equipments cause while can well preventativemaintenance personnel carrying out upkeep operation.At present, the normal method adopting is for as shown in Figure 1, K1 is the upper electric control switch of supply lines, it is a cutter type switch, it opens with turn-offing is that rotating by a small machine has been drawn, the rotating of small machine is by the rotating button control of manual operation small machine, the earth protective device of light-track vehicle garage is a simple ground connection hook 1, ground connection hook 1 is that an end is received on rail (the earth), the other end is made hook-shaped conductor, under power supply after electricity, manually with insulating bar, the hook end of ground connection hook 1 is hung on supply lines, whole like this supply lines has just been received together with the earth.But there is following shortcoming in above-mentioned technology:
1, full manual operation, in practical operation, a lot of operating personnel scheme simply, be unwilling ground connection to be hooked on supply lines, cause (1) although the lower electricity of supply lines, but the electric capacity on the light rail car that supply lines connects and other capacitive devices on supply lines are appointed and had a large amount of electric energy, maintenance personal touches supply lines or other electric equipments still likely get an electric shock at roof, and causes the danger of falling from high altitude.(2) maintenance personal during still at roof upkeep operation, operating personnel allow supply lines power on, and cause that maintenance personal gets an electric shock, falling from high altitude dangerous.
2, under supply lines after electricity, electric capacity on the light rail car that supply lines connects and other capacitive devices on supply lines are appointed and are had a large amount of electric energy, now with insulating bar, ground connection hook is directly hung on supply lines, first can between supply lines and ground connection ditch, produce a large amount of electric sparks, supply lines box ground connection hook is caused damage, in addition because ground connection hook is directly to receive rail from supply lines, therefore at ground connection clasp joint, contact the moment of supply lines, electric capacity on the light rail car that supply lines connects and other capacitive devices on supply lines, it is an instantaneous discharge process, electric current is very large, be equivalent to instantaneous short-circuit, can greatly reduce electric capacity on the light rail car that supply lines connects and the useful life of other capacitive devices on supply lines.
3, when supply lines powers on, first ground connection to be hooked up down, then could power on to supply lines, yet site operation personnel often ignores and also hangs with ground connection hook on supply lines, and the earth connection shorted to earth while causing powering on that directly powers on, thereby cause power supply tripping operation, the huge transient current producing while powering in addition may burn some devices of supply lines.
4, this technical scheme lacks the warning device that powers on, and can not in supply lines power up or when charged, effectively report to the police.
Summary of the invention
The present invention adopts following scheme to overcome the above problems.
1. under supply lines, electricity is; the automatic ground protection device of this invention design will be connected discharge resistance automatically; electric capacity on the light rail car that supply lines is connect and a large amount of electric energy of other capacitive devices on supply lines are released; guaranteed when maintenance personal carries out maintenance activity can not wounded by this part electric energy; this part energy is slowly released by resistance simultaneously, and the electric capacity on the light rail car that supply lines is connect and other capacitive devices on supply lines can not produce infringement.When earth connection and supply lines are connected in addition, can not produce spark yet, damage switch.
2. owing to being to pass through Automatic control of single chip microcomputer, so deenergization, connection discharge resistance, connection earth connection, disconnect earth connection, send electric alarm, disconnect discharge resistance, switch on power is all by monolithic processor controlled, there will not be omission action-item, there will not be human error, cause there is no ground connection and situation about powering on, thereby cause personnel to injure or device damage.
3. generally before supply lines powers on, the operating personnel that power on can notify vehicle maintenance personnel to withdraw supply lines in the neighbourhood, and then power on, yet, the operating personnel that power in reality forget sometimes to notify maintenance personal or have maintenance personal to notify while withdrawing and are missed, this is to power on to cause the injury of getting an electric shock to these personnel, the automatic ground protection device designing due to this invention has automatically the above function of electric alarm, after the operating personnel that power on notify maintenance personal to withdraw, operation powers on, central control unit is received and is powered on after instruction, can sound immediately the upper electric alarm that is arranged on maintenance activity ground, and light the warning light that powers on, allow the personnel that leave over maintenance activity withdraw, after two minutes, disconnect again earthed switch, disconnect discharge resistance, closed electrical source switch.The probability of so greatly less maintenance personal's electric shock.
The technological means that the present invention adopts is as follows:
An automatic ground protective device for light rail garage power, is characterized in that comprising CPU, control box, supply lines voltage signal detecting unit, switch element and alarm unit;
Described control box sends and powers on and the lower signal of telecommunication to CPU for operating personnel;
Described supply lines voltage signal detecting unit is for detection of voltage swing on supply lines, and by testing result real-time Transmission to CPU;
Described switch element comprises supply lines upper electrical switch K1, earthed switch K2 and discharge resistance K switch 3, described supply lines upper electrical switch K1 is used for controlling the upper and lower electricity of vehicle, described earthed switch K2 is used for controlling vehicle supply lines and is connected together or disconnects, and described discharge resistance K switch 3 is connected with discharge resistance or disconnects for controlling vehicle supply lines;
Described alarm unit is used for carrying out sound, light is reported to the police;
Described CPU is processed for receiving the control command that control box transmits, and send corresponding control command to switch element: when receiving control box, transmit to such an extent that be lower electric instruction, CPU is sent and is disconnected supply lines upper electrical switch K1 and closed discharge resistance K switch 3 instructions to switch element, and control alarm unit and report to the police, simultaneously CPU receives the voltage signal on the vehicle supply lines that supply lines voltage signal detecting unit passes back in real time, and judge whether the voltage that this voltage signal represents is greater than setting threshold, as be greater than setting threshold, hold mode is constant, as being less than setting threshold, CPU is sent the instruction of closed ground switch K2 to switch element, control alarm unit stop alarm simultaneously, when receiving control box, transmit to such an extent that be the instruction that powers on, described central processing unit controls alarm unit is reported to the police, to switch element, send the instruction that disconnects earthed switch K2 and discharge resistance K switch 3, the instruction of then sending closed supply lines upper electrical switch K1 to switch element simultaneously.
Described supply lines voltage signal detecting unit is voltage sensor DCVT, and described CPU is STC5410 type single-chip microcomputer.
Described supply lines upper electrical switch K1, earthed switch K2 are cutter type switch, and it is opened and turn-offs is the rotating traction control by small machine; Described discharge resistance K switch 3 is contactor.
When receiving control box, transmit to such an extent that be the instruction that powers on, described CPU is sent the instruction of closed supply lines upper electrical switch K1 to switch element, after supply lines upper electrical switch K1 closure, described central processing unit controls alarm unit stops carrying out acoustic alarm, only carries out light warning.
Utilize above-mentioned protective device to carry out a control method for light-track vehicle garage power supply automatic earthing, it is characterized in that comprising: lower electric control and upper electric control, concrete steps are as follows:
Lower electric control:
(1) operating personnel's operating operation control box sends lower electric instruction to CPU, and then the supply lines upper electrical switch K1 in central processing unit controls switch element disconnects, and controls alarm unit and report to the police;
(2) discharge resistance K switch 3 closures in central processing unit controls switch element;
(3) simultaneously CPU receives the voltage signal on the vehicle supply lines that supply lines voltage signal detecting unit passes back in real time, and judges whether the voltage that this voltage signal represents is greater than setting threshold
(4) as being greater than setting threshold, hold mode is constant;
(5), as being less than setting threshold, CPU is sent the instruction of closed ground switch K2 to switch element, control alarm unit stop alarm simultaneously;
Upper electric control:
(1) operating personnel's operating operation control box sends to CPU the instruction that powers on, and then central processing unit controls alarm unit is reported to the police, and in the time of waiting for more than two minutes;
(2), after having waited for, the earthed switch K2 in central processing unit controls switch element and discharge resistance K switch 3 disconnect;
(3) then the supply lines upper electrical switch K1 in central processing unit controls switch element is closed.
Described upper electric control also comprises that described central processing unit controls alarm unit stops carrying out acoustic alarm, the step of only carrying out light warning after supply lines upper electrical switch K1 closure.
Compared with the existing technology, advantage of the present invention is apparent, specific as follows:
1, adopt automatically and control, can automatically complete lower electricity, electric discharge, ground connection, disconnection ground connection, disconnect electric discharge, warning, a series of control of upper electric light, simplified operation, reduced the serious consequence that human error causes.
2, there is automatic discharging function, reduced the infringement of ground connection electric discharge to equipment, the risk of the electric shock that also having reduced does not discharge causes maintenance personal.
3, there is the warning function that automatically powers on, reduced the electric shock risk to maintenance personal.
Accompanying drawing explanation
Fig. 1 is original technology earthed circuit schematic diagram;
Fig. 2 is automatic ground protective device for light rail garage power main circuit schematic diagram;
Fig. 3 is automatic ground protective device for light rail garage power central control unit schematic diagram.
In figure: 1, ground connection hook, 2, CPU, 3, control box, 4, supply lines voltage signal detecting unit, 5, switch element, 6, alarm unit.
Embodiment
Automatic ground protective device for light rail garage power as shown in Figures 2 and 3, comprises CPU 2, control box 3, supply lines voltage signal detecting unit 4, switch element 5 and alarm unit 6;
Described control box 3 sends and powers on and the lower signal of telecommunication to CPU 2 for operating personnel;
Described supply lines voltage signal detecting unit 4 is for detection of voltage swing on supply lines, and by testing result real-time Transmission to CPU 2;
Described switch element 5 comprises supply lines upper electrical switch K1, earthed switch K2 and discharge resistance K switch 3, described supply lines upper electrical switch K1 is used for controlling the upper and lower electricity of vehicle, described earthed switch K2 is used for controlling vehicle supply lines and is connected together or disconnects, and described discharge resistance K switch 3 is connected with discharge resistance or disconnects for controlling vehicle supply lines;
Described alarm unit 6 is for carrying out sound, light warning;
Described CPU 2 is processed for the control command that receives control box 3 and transmit, and send corresponding control command to switch element 5: when receiving control box 3, transmit to such an extent that be lower electric instruction, CPU 2 is sent and is disconnected supply lines upper electrical switch K1 and closed discharge resistance K switch 3 instructions to switch element 5, and control alarm unit 6 and report to the police, voltage signal on the vehicle supply lines that the real-time reception supply lines of CPU 2 voltage signal detecting unit 4 is passed back simultaneously, and judge whether the voltage that this voltage signal represents is greater than setting threshold (it is threshold criteria that the present invention adopts human safety voltage 36V), as be greater than setting threshold, hold mode is constant, as being less than setting threshold, CPU 2 is sent the instruction of closed ground switch K2 to switch element 5, control alarm unit 6 stop alarms simultaneously, when receiving control box 3, transmit to such an extent that be the instruction that powers on, described CPU 2 is controlled alarm unit 6 and is reported to the police, to switch element 5, send the instruction that disconnects earthed switch K2 and discharge resistance K switch 3, the instruction of then sending closed supply lines upper electrical switch K1 to switch element 5 simultaneously.
Wherein supply lines voltage signal detecting unit 4 is voltage sensor DCVT, described CPU 2 is STC5410 type single-chip microcomputer, this chip has the AD of 10, can process the signal that supply lines voltage signal processing unit is given single-chip microcomputer, can meet design needs.Controlling alarm unit is the unit for upper electric alarm, there are alarming horn and alarm lamp two parts, they are arranged on the maintenance activity district of light rail car, its STC single-chip microcomputer is by the IO mouth signal control contactor of STC, to switch on or off their power supply, usings to reach to control the object (certain CPU 2 of the present invention also can adopt other single-chip microcomputer, DSP, ARM, FPGA, PLC etc. to have the device of logic control function or equipment as main control unit) that they give the alarm or stop alarm.Shown in have at least in control box 3 power on, lower electric two control buttons, operating personnel can be by powering on to their operation and lower electric control.
Described supply lines upper electrical switch K1, earthed switch K2 are cutter type switch, and it is opened and turn-offs is the rotating traction control by small machine, and the rotating of small machine is to adopt contactor group to realize; Described discharge resistance K switch 3 is contactor, and only turning on and off of the coil of need control contact, just can realize the shutoff of opening of K3.
When receiving control box 3, transmit to such an extent that be the instruction that powers on, described CPU 2 is sent the instruction of closed supply lines upper electrical switch K1 to switch element 5, after supply lines upper electrical switch K1 closure, described CPU 2 is controlled alarm unit 6 and is stopped carrying out acoustic alarm, only carries out light warning.
The control method that this protective device carries out light-track vehicle garage power supply automatic earthing comprises: lower electric control and upper electric control, and concrete steps are as follows:
Lower electric control:
(1) operating personnel's operating operation control box 3 sends lower electric instruction to CPU 2, and then the supply lines upper electrical switch K1 in CPU 2 control switch unit 5 disconnects, and controls alarm unit 6 and report to the police;
(2) discharge resistance K switch 3 closures in CPU 2 control switch unit 5;
(3) voltage signal on the vehicle supply lines that the real-time reception supply lines of CPU 2 voltage signal detecting unit 4 is passed back simultaneously, and judge whether the voltage that this voltage signal represents is greater than setting threshold
(4) as being greater than setting threshold, hold mode is constant;
(5) as being less than setting threshold, CPU 2 is sent the instruction of closed ground switch K2 to switch element 5, controls alarm unit 6 stop alarms simultaneously.
What now, vehicle maintenance personnel just can safety carries out vehicle maintenance operation.After completing maintenance activity, after supply lines power-on and power-off operating personnel notify vehicle maintenance personnel to withdraw, operation just can power on.
Upper electric control:
(1) operating personnel's operating operation control box 3 sends to CPU 2 instruction that powers on, and then CPU 2 control alarm units 6 are reported to the police, and in the time of waiting for more than two minutes;
(2), after having waited for, the earthed switch K2 in CPU 2 control switch unit 5 and discharge resistance K switch 3 disconnect;
(3) then the supply lines upper electrical switch K1 in CPU 2 control switch unit 5 is closed.
In addition, upper electric control step also can comprise after supply lines upper electrical switch K1 closure, and described CPU 2 is controlled alarm units 6 and stopped carrying out acoustic alarm, the step of only carrying out light warning.
The above; it is only preferably embodiment of the present invention; but protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; according to technical scheme of the present invention and inventive concept thereof, be equal to replacement or changed, within all should being encompassed in protection scope of the present invention.
Claims (3)
1. an automatic ground protective device for light rail garage power, is characterized in that comprising CPU (2), control box (3), supply lines voltage signal detecting unit (4), switch element (5) and alarm unit (6);
Described control box (3) sends and powers on and the lower signal of telecommunication to CPU (2) for operating personnel;
Described supply lines voltage signal detecting unit (4) is for detection of voltage swing on supply lines, and by testing result real-time Transmission to CPU (2);
Described switch element (5) comprises supply lines upper electrical switch K1, earthed switch K2 and discharge resistance K switch 3, described supply lines upper electrical switch K1 is used for controlling the upper and lower electricity of vehicle, described earthed switch K2 is used for controlling vehicle supply lines and is connected together or disconnects, and described discharge resistance K switch 3 is connected with discharge resistance or disconnects for controlling vehicle supply lines;
Described alarm unit (6) is for carrying out sound, light warning;
Described CPU (2) is processed for the control command that receives control box (3) and transmit, and send corresponding control command to switch element (5): when what receive that control box (3) transmits, be lower electric instruction, CPU (2) is sent and is disconnected supply lines upper electrical switch K1 and closed discharge resistance K switch 3 instructions to switch element (5), and control alarm unit (6) and report to the police, simultaneously CPU (2) receives the voltage signal on the vehicle supply lines that supply lines voltage signal detecting unit (4) passes back in real time, and judge whether the voltage that this voltage signal represents is greater than setting threshold, as be greater than setting threshold, hold mode is constant, as being less than setting threshold, alarm unit (6) stop alarm is controlled in the instruction that CPU (2) is sent closed ground switch K2 to switch element (5) simultaneously, when what receive that control box (3) transmits, it is the instruction that powers on, described CPU (2) is controlled alarm unit (6) and is reported to the police, to switch element (5), send the instruction that disconnects earthed switch K2 and discharge resistance K switch 3, the instruction of then sending closed supply lines upper electrical switch K1 to switch element (5) simultaneously,
Described supply lines voltage signal detecting unit (4) is voltage sensor DCVT, and described CPU (2) is STC5410 type single-chip microcomputer;
Described supply lines upper electrical switch K1, earthed switch K2 are cutter type switch, and it is opened and turn-offs is the rotating traction control by small machine; Described discharge resistance K switch 3 is contactor;
When what receive that control box (3) transmits, it is the instruction that powers on, described CPU (2) is sent the instruction of closed supply lines upper electrical switch K1 to switch element (5), after supply lines upper electrical switch K1 closure, described CPU (2) is controlled alarm unit (6) and is stopped carrying out acoustic alarm, only carries out light warning.
2. utilize protective device described in claim 1 to carry out a control method for light-track vehicle garage power supply automatic earthing, it is characterized in that comprising: lower electric control and upper electric control, concrete steps are as follows:
Lower electric control:
(1) operating personnel operate control box (3) and send lower electric instruction to CPU (2), and then the supply lines upper electrical switch K1 in CPU (2) control switch unit (5) disconnects, and controls alarm unit (6) and report to the police;
(2) discharge resistance K switch 3 closures in CPU (2) control switch unit (5);
(3) simultaneously CPU (2) receives the voltage signal on the vehicle supply lines that supply lines voltage signal detecting unit (4) passes back in real time, and judges whether the voltage that this voltage signal represents is greater than setting threshold;
(4) as being greater than setting threshold, hold mode is constant;
(5), as being less than setting threshold, alarm unit (6) stop alarm is controlled in the instruction that CPU (2) is sent closed ground switch K2 to switch element (5) simultaneously;
Upper electric control:
(1) operating personnel operate control box (3) and send to CPU (2) instruction that powers on, and then CPU (2) control alarm unit (6) is reported to the police, and wait for two minutes above time again;
(2), after having waited for, the earthed switch K2 in CPU (2) control switch unit (5) and discharge resistance K switch 3 disconnect;
(3) then the supply lines upper electrical switch K1 in CPU (2) control switch unit (5) is closed.
3. control method according to claim 2, is characterized in that described upper electric control also comprises after supply lines upper electrical switch K1 closure, and described CPU (2) is controlled alarm unit (6) and stopped carrying out acoustic alarm, the step of only carrying out light warning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010272726.2A CN102035195B (en) | 2010-08-31 | 2010-08-31 | Automatic ground protective device for light rail garage power and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010272726.2A CN102035195B (en) | 2010-08-31 | 2010-08-31 | Automatic ground protective device for light rail garage power and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102035195A CN102035195A (en) | 2011-04-27 |
| CN102035195B true CN102035195B (en) | 2014-03-12 |
Family
ID=43887705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010272726.2A Expired - Fee Related CN102035195B (en) | 2010-08-31 | 2010-08-31 | Automatic ground protective device for light rail garage power and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102035195B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105510765B (en) * | 2014-09-24 | 2020-01-07 | 中车大连电力牵引研发中心有限公司 | Ground fault diagnosis device |
| CN104505688B (en) * | 2014-12-12 | 2017-02-22 | 国家电网公司 | Operation method and device of grounding wire |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008049705A1 (en) * | 2008-09-30 | 2010-04-01 | Siemens Aktiengesellschaft | Device and method for limiting the rail potential in a DC track |
| CN101695906A (en) * | 2009-10-16 | 2010-04-21 | 江西稀有稀土金属钨业集团有限公司 | Automatic switch-on and switch-off device of overhead line of electric locomotive |
| CN201812163U (en) * | 2010-08-31 | 2011-04-27 | 中国北车股份有限公司大连电力牵引研发中心 | Automatic ground protection device for power supply of light-track vehicle garage |
-
2010
- 2010-08-31 CN CN201010272726.2A patent/CN102035195B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008049705A1 (en) * | 2008-09-30 | 2010-04-01 | Siemens Aktiengesellschaft | Device and method for limiting the rail potential in a DC track |
| CN101695906A (en) * | 2009-10-16 | 2010-04-21 | 江西稀有稀土金属钨业集团有限公司 | Automatic switch-on and switch-off device of overhead line of electric locomotive |
| CN201812163U (en) * | 2010-08-31 | 2011-04-27 | 中国北车股份有限公司大连电力牵引研发中心 | Automatic ground protection device for power supply of light-track vehicle garage |
Non-Patent Citations (4)
| Title |
|---|
| YDT_型机车登顶作业安全监控系统研究;董立新等;《内燃机车》;20060731;第45-46页 * |
| 电力机车整备作业接触网高压防护系统的研究;陈永强;《中国优秀硕士学位论文全文数据库》;20090515;第6-7,46-47页 * |
| 董立新等.YDT_型机车登顶作业安全监控系统研究.《内燃机车》.2006, |
| 陈永强.电力机车整备作业接触网高压防护系统的研究.《中国优秀硕士学位论文全文数据库》.2009, |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102035195A (en) | 2011-04-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102231489B (en) | Method for monitoring grounding wire connection status during power line maintenance work | |
| CN207180888U (en) | A kind of cable temperature monitoring device with alarm and power down function | |
| CN104319740A (en) | Monitoring and protecting device for electric field coupling wireless charging system and method thereof | |
| CN203911590U (en) | Ship shore power device with safety interlocking function | |
| CN108011348A (en) | Low-voltage intelligent distribution Control protection system and its control guard method | |
| CN102035195B (en) | Automatic ground protective device for light rail garage power and control method thereof | |
| CN204271609U (en) | 10kV intelligent subscriber boundary switch controller | |
| CN207381952U (en) | Low-voltage intelligent distribution Control protection system | |
| CN201812163U (en) | Automatic ground protection device for power supply of light-track vehicle garage | |
| CN106356236B (en) | A kind of open air mast switch knife-switch anti-error operation device and method | |
| CN104648161A (en) | Anti-breaking device for contact line of electric locomotive | |
| CN202916635U (en) | Stand-by pump controller | |
| CN201995078U (en) | Monitoring device for hanging and connecting of ground wire for overhauling operation of contact net based on video image | |
| CN111711194B (en) | Power supply guarantee device based on bypass operation integration | |
| CN210854167U (en) | Alarm stopping device for bucket elevator | |
| CN205123420U (en) | Long -range controlling means that reports an emergency and asks for help or increased vigilance of switching station auxiliary assembly | |
| CN209948519U (en) | Ring main unit prevents taking earthing combined floodgate protection device | |
| CN202305626U (en) | Intelligent automatic management system for preventing stealing electricity | |
| CN202903949U (en) | Wireless alarm apparatus for circuit fault | |
| CN201458573U (en) | Bypass control circuit on crane | |
| CN105872487A (en) | Power transmission line external breakage preventing monitor device based on wire power supply | |
| CN207001756U (en) | Silo conveyer belt control system | |
| CN206264805U (en) | A kind of charging station | |
| CN105656199B (en) | Automatic dynamic monitoring is digital to connect power transmission line | |
| CN206076135U (en) | A kind of outdoor mast switch knife-switch anti-error operation device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Chen Haiyan Inventor after: Jiang Tao Inventor after: Che Xiangzhong Inventor after: Dai Bijun Inventor before: Jiang Tao Inventor before: Che Xiangzhong Inventor before: Dai Bijun |
|
| CB03 | Change of inventor or designer information | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: JIANG TAO CHE XIANGZHONG DAI BIJUN TO: CHEN HAIYAN JIANG TAO CHE XIANGZHONG DAI BIJUN |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140312 Termination date: 20140831 |
|
| EXPY | Termination of patent right or utility model |