CN201199628Y - Protecting equipment for electric force power distribution PLC control detection line - Google Patents
Protecting equipment for electric force power distribution PLC control detection line Download PDFInfo
- Publication number
- CN201199628Y CN201199628Y CNU2008200106275U CN200820010627U CN201199628Y CN 201199628 Y CN201199628 Y CN 201199628Y CN U2008200106275 U CNU2008200106275 U CN U2008200106275U CN 200820010627 U CN200820010627 U CN 200820010627U CN 201199628 Y CN201199628 Y CN 201199628Y
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- voltage
- sensor
- signals
- plc controller
- power distribution
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Abstract
The utility model provides a PLC control and check circuit protection device used for power distribution. The utility model is mainly characterized in that the low-pressure voltage of the high voltage in a power grid is converted into signals of 0-100V by a medium voltage sensor, and then convert the 0-100V voltage signals into standard current signals of 4-20mA by a voltage separation sensor and the obtained signals are input into the input end of a PLC controller which processes the signals through the analogue entrance and eliminates undesired signals, and then are output by a display part. The protection device has the advantages that the function is full, the precision is high, the technology is simple, the application range is wide, and the application and popularization are easy.
Description
Technical field:
The utility model relates to a kind of power distribution circuit and detects protective device, particularly a kind of power distribution PLC control detection line protective devices.
Background technology:
At present; the power distribution line protective devices of China adopt loose mail or single-chip microcomputer to combine mostly; although low price; but insufficiency does not often reach specification requirement and accuracy standard; therefore; be unfavorable for producing in batches, anti-environment capacity is lower, is unfavorable for that also extensive use is promoted in the capable protection control of electric appliance circuits.
Summary of the invention:
The purpose of this utility model is the problem that exists in the above-mentioned technology, provides a kind of power distribution PLC: the control detection line protective devices.It is that a kind of function is complete, the wireline inspection protective device that the precision height is convenient to promote.
The purpose of this utility model is achieved in that and comprises the PLC controller, voltage sensor, current sensor, current transformer, voltage isolation transducer, it is characterized in that, voltage sensor links to each other with the voltage isolation transducer, current sensor links to each other with the electric current isolation sensor,, link to each other with the PLC controller respectively, central controller also links to each other with the PLC controller again.
The voltage of electrical network mesohigh or mesolow is the voltage signal that voltage transitions is become 0-100V by voltage sensor, through the voltage isolation transducer voltage signal of 0-100V is converted to the voltage signal of standard 4-20mA again, input to the input of PLC controller, the PLC controller is handled signal by the analog input mouth, excludes the interference signal.Through display part output, show wherein voltage again.
Current sensor converts current signal to the 0-5Am current signal, converts the current signal of 4-20mA again to through the electric current isolation sensor, inputs to the input of PLC controller.The PLC controller passes to central control room with the signal that collects.
Compared with the prior art the utility model has multiple functional, the precision height, and technology is simple, has wide range of applications, and is easy to utilize.
Description of drawings:
Fig. 1 is a frame structure schematic diagram of the present utility model
Fig. 2 is a circuit theory connection diagram of the present utility model
Embodiment:
Below in conjunction with accompanying drawing present embodiment is described further:
As shown in Figure 1, voltage sensor 4 converts voltage signal the voltage signal of 0-100V to, through voltage isolation transducer 6 voltage signal of 0-100V is converted to the voltage signal of standard 4-20mA again.Input to the input of PLC controller 9, the PLC controller is handled signal by the analog input mouth, excludes the interference signal.Showing, show its voltage through touch-screen 13.
In like manner, current sensor 5 converts current signal to the 0-5Am current signal, converts the current signal of 4-20mA again to through electric current isolation sensor 7, inputs to the input of PLC controller 9.PLC controller 9 showing through touch-screen 13, shows its magnitude of current with the signal that collects.
As shown in Figure 2, mains voltage signal 1 through voltage sensor 4 with signals collecting, convert the voltage signal of 0-100V to, convert the voltage signal of 0-100V the voltage signal of standard 4-20mA to through voltage isolation transducer 6 again, input to the input of PLC controller 9.Power network current signal 2 through current sensor 5 with signals collecting, input to current sensor 5, the current signal of current sensor 5 output 0-5A inputs to electric current isolation sensor 7, and electric current isolation sensor 7 inputs to the current signal of 4-20mA the input of PLC controller 9.The signal and the set-point of 9 pairs of inputs of PLC controller compare, by exporting after the computing, by touch-screen 13 display voltage, the magnitude of current again.In case anomaly appears in voltage, electric current, can pass through the output of PLC controller 9, thereby can implement separating brake 11 or close a floodgate 10 realization route protections.
Can signal be transferred to central control room 3 by the network communication interface 12 of PLC controller in order further to carry out remote operation, central control room can show transmitting signal, also can make amendment, and can also carry out remote operation control.
In order to ensure the working stability of PLC, power supply adopts Switching Power Supply 8, and the PLC controller has high reliability, and reliability of the present utility model can improve greatly.
The utility model can not only be realized the wireline inspection protection control of current/voltage, also can be used for the protection of transformer, the control of stand-by power supply switching and various electric appliance circuits.
Claims (1)
1. a power distribution PLC control circuit detects protective device; comprise the PLC controller; voltage sensor, current sensor, electric current isolation sensor, voltage isolation transducer, touch-screen; it is characterized in that; voltage sensor links to each other with the voltage isolation transducer; current sensor links to each other with the electric current isolation sensor, links to each other with the PLC controller respectively again, and central control room, touch-screen link to each other with the PLC controller respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200106275U CN201199628Y (en) | 2008-02-03 | 2008-02-03 | Protecting equipment for electric force power distribution PLC control detection line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200106275U CN201199628Y (en) | 2008-02-03 | 2008-02-03 | Protecting equipment for electric force power distribution PLC control detection line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201199628Y true CN201199628Y (en) | 2009-02-25 |
Family
ID=40450778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200106275U Expired - Fee Related CN201199628Y (en) | 2008-02-03 | 2008-02-03 | Protecting equipment for electric force power distribution PLC control detection line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201199628Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102294532A (en) * | 2011-06-14 | 2011-12-28 | 北京宏孚瑞达科技有限公司 | Voltage reducing electric-shock protection device of arc welding power source and arc welding power supply device |
| CN103078332A (en) * | 2013-01-05 | 2013-05-01 | 山西省电力公司大同供电分公司 | Transformer inductive reactive power stepped control device and method |
-
2008
- 2008-02-03 CN CNU2008200106275U patent/CN201199628Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102294532A (en) * | 2011-06-14 | 2011-12-28 | 北京宏孚瑞达科技有限公司 | Voltage reducing electric-shock protection device of arc welding power source and arc welding power supply device |
| CN103078332A (en) * | 2013-01-05 | 2013-05-01 | 山西省电力公司大同供电分公司 | Transformer inductive reactive power stepped control device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090225 Termination date: 20100203 |