CN203606423U - Three-channel three-type voltage monitor - Google Patents
Three-channel three-type voltage monitor Download PDFInfo
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- CN203606423U CN203606423U CN201320561829.XU CN201320561829U CN203606423U CN 203606423 U CN203606423 U CN 203606423U CN 201320561829 U CN201320561829 U CN 201320561829U CN 203606423 U CN203606423 U CN 203606423U
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Abstract
The utility model discloses a three-channel three-type voltage monitor. The three-channel three-type voltage monitor comprises an analog-to-digital conversion circuit and a processing unit. A sampling circuit is connected with a detected three-phase voltage circuit, and the sampling circuit is connected with the processing unit through the analog-to-digital conversion circuit; and the sampling circuit is composed of three paths of independent sub sampling circuits, the three paths of the sub sampling circuits are connected in parallel, and voltage transformers and a plurality of divider resistors are serially connected in the sub sampling circuits. The three-channel three-type voltage monitor is advantageous in that, through arrangement of the divider resistors and the voltage transformers in the three paths of the independent sub sampling circuits of the sampling circuit, three-phase voltage is converted into three paths of independent voltage analog quantities, the voltage monitor can work normally in the case that any phase of the three-phase voltage circuit is accessed, a monitoring function of the three-channel three-type voltage monitor is guaranteed, usage cost and maintenance cost are lowered at the same time, and the monitoring quality is improved.
Description
Technical field
The quality of voltage that the utility model relates in electrical network project reconstruction is administered field, especially a kind of triple channel three type voltage monitors that are installed on on-the-spot each distribution transforming Circuit Fault on Secondary Transformer.
Background technology
According to national standard " DL500-2009. voltage monitoring instrument order technical conditions " file, definition, product classification, requirement, test method, inspection rule and mark, packing, transportation and the storage of voltage monitoring instrument are stipulated.Wherein, monitored rated voltage is the rated voltage of monitored system, and its value is 0.22kV, 0.38kV, 3kV, 6kV, 10kV, 20kV, 35kV, 63kV, 110kV, 220kV, 330kV and 500kV etc.By monitored rated voltage classification, can be divided into following three classes:
1) 3kV and above (sampled voltage of monitor is taken from the secondary voltage of line voltage mutual inductor, and its ratings is 100V); 2) 220V(is for 220V single phase power supply system); 3) 380V(is for 380V three-phase power supply system monitoring three-phase voltage average qualification rate).Therefore, the type of the monitoring voltage of voltage monitoring instrument always has three kinds: 110V, 220V and 380V.
By the three types of the monitoring voltage of above-mentioned voltage monitoring instrument, traditional voltage monitoring instrument is generally divided into following two large types:
A) single channel list voltage gradation monitoring: Dai Yi road monitoring channel, wherein a type of can only monitor 100V, 220V or 380V; B) multichannel list voltage gradation monitoring: band Multi-channel monitoring passage, is generally 3 tunnels, can only monitor 100V, 220V or 380V wherein a type.
The voltage monitoring instrument of above-mentioned two kinds of traditional types, although meet to a certain extent actual monitoring needs, the feature of its single channel and univoltage type, in the electrical network Overall Reconstruction demand day by day improving, function underaction; In specific environment, often to adopt multiple devices to complete a monitoring function, cause the waste of goods and materials cost and maintenance cost; And the precision of multiple devices often exists error, on certain procedures, can reduce the quality of monitoring.
Utility model content
The purpose of this utility model is the defect that overcomes above-mentioned prior art, provides at three-phase voltage path and accesses under the prerequisite of a phase arbitrarily, and voltage monitoring instrument all can normally be worked, and use cost is low, the triple channel three type voltage monitors that monitoring quality is good.
The utility model is achieved in that triple channel three type voltage monitors, comprise sample circuit, analog to digital conversion circuit and processing unit (processing unit), described sample circuit is connected with tested three-phase voltage path, and described sample circuit is connected with processing unit through analog to digital conversion circuit; Independently subsample the electric circuit constitute of described sample circuit You San road, subsample circuit is in parallel described in three tunnels, and is in series with voltage transformer (VT) and some divider resistances in described subsample circuit.Three-phase voltage path is linked into after described sample circuit samples processing and is input in analog-digital conversion circuit as described, analog-digital conversion circuit as described is connected with described processing unit, described sample circuit have three independently subsample circuit independently gather voltage analog independence subsample circuit independence subsample circuit.
Described processing unit is connected with clock circuit.
Described processing unit is connected with storer.
Described processing unit is also connected with display circuit, and described display circuit is 16T202DAJ type VFD circuit.
Described processing unit is connected with computing machine by interface circuit.
The utility model has the advantages that: the setting of divider resistance and voltage transformer (VT) in tri-tunnel independence subsample circuit in sample circuit, make three-phase voltage become three road independent voltage analog quantitys, can accomplish in the situation that three-phase voltage path accesses a phase arbitrarily, can make voltage monitoring instrument normally work, guarantee the monitoring function of triple channel three voltage types; The monitoring function of triple channel three voltage types has lowered operation and maintenance cost; Only need an equipment operation, reduced error, improved the quality of monitoring.
Accompanying drawing explanation
Fig. 1 is the utility model triple channel three type voltage monitor circuit block diagrams.
Fig. 2 is the utility model triple channel three type voltage monitor sample circuit schematic diagrams.
Embodiment
Below in conjunction with accompanying drawing, concrete case study on implementation of the present utility model is illustrated:
As shown in Figure 1, triple channel three type voltage monitors, triple channel three type voltage monitors, comprise sample circuit, analog to digital conversion circuit and processing unit, described sample circuit is connected with tested three-phase voltage path, and described sample circuit is connected with processing unit through analog to digital conversion circuit, A/D converter in analog-digital conversion circuit as described adopts AD574A, and described analog to digital converter can be digital signal by analog-signal transitions; Independently subsample the electric circuit constitute of described sample circuit You San road, subsample circuit is in parallel described in three tunnels, and is in series with voltage transformer (VT) and some divider resistances in described subsample circuit.Three-phase voltage path be linked into described sample circuit sample process after be input in analog-digital conversion circuit as described, analog-digital conversion circuit as described is connected with described processing unit, described sample circuit have three independently subsample circuit independently gather voltage analog.
In addition, described processing unit adopts AT89C51, and described processing unit is also connected with clock circuit, storer and display circuit, and described display circuit adopts 16T202DAJ type VFD(Vacuum Fluorescent Display, vacuum fluorescent display screen, is called for short VFD) circuit.Described processing unit is also connected with interface circuit.Be connected with PC interface by processing unit described in described interface circuit.
As shown in Figure 2, described sample circuit is divided into three tunnel only son's sample circuits and independently gathers voltage analog, and described three tunnel independence subsample circuit are connected in parallel, and are in series with respectively some divider resistances and voltage transformer pt 1-PT3 in described independent subsample circuit.In figure, UA, UN1 and UB, UN2 and UC, UN3 Ge Wei mono-tunnel voltage path, Gong San road.Described three tunnel voltage path, cause respectively in the independent subsample circuit of sample circuit, in independent subsample circuit, adopt Voltage Series dividing potential drop, then through voltage transformer (VT) isolation, become respectively three road independent voltage analog quantitys, then access analog to digital conversion circuit for sampling.
Such circuit design, can, in the situation that tested three-phase voltage path accesses a phase arbitrarily, normally work voltage monitoring instrument, has guaranteed the function of triple channel three voltage monitorings.
While using the utility model, tested three-phase voltage path is added to respectively the input end of described sample circuit, and described sample circuit is added to the input end of analog to digital conversion circuit after three-phase voltage is sampled.Data input processing unit after latch after changing by ADC, judge that by computing whether tested voltage is qualified again, the result of measurement can be deposited in described storer, and by described storer, the historical data of storage can be recalled again, be simultaneously displayed on the VFD of display circuit.Described Keysheet module can be adjusted clock circuit, after described processing unit is adjusted clock circuit by described Keysheet module simultaneously, can in real time time and measurement result be presented on display circuit VFD.In addition, described processing unit is connected with PC interface by described interface circuit, described interface uses SP490 device to build, this device is the RS-485 level transceiver of full duplex, by being connected with the serial ports of processing unit, described processing unit can be operated by PC, thereby realizes the function such as operated from a distance, Centralized Monitoring of instrument.
The utility model can be accomplished, in the situation that three-phase voltage path accesses a phase arbitrarily, can make voltage monitoring instrument normally work, and guarantees the monitoring function of triple channel three voltage types, has lowered operation and maintenance cost simultaneously and has improved the quality of monitoring.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being encompassed in protection domain of the present utility model.
Claims (6)
1. triple channel three type voltage monitors, comprise sample circuit, and analog to digital conversion circuit and processing unit, is characterized in that, described sample circuit is connected with tested three-phase voltage path, and described sample circuit is connected with processing unit through analog to digital conversion circuit; Independently subsample the electric circuit constitute of described sample circuit You San road, subsample circuit is in parallel described in three tunnels, and is in series with voltage transformer (VT) and some divider resistances in described subsample circuit.
2. triple channel three type voltage monitors as claimed in claim 1, is characterized in that, described processing unit is connected with clock circuit.
3. triple channel three type voltage monitors as claimed in claim 1, is characterized in that, described processing unit is connected with storer.
4. triple channel three type voltage monitors as claimed in claim 1, is characterized in that, described processing unit is connected with display circuit.
5. triple channel three type voltage monitors as claimed in claim 1, is characterized in that, described processing unit is connected with interface circuit.
6. triple channel three type voltage monitors as claimed in claim 5, is characterized in that, described processing unit is connected with computing machine by interface circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320561829.XU CN203606423U (en) | 2013-09-10 | 2013-09-10 | Three-channel three-type voltage monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320561829.XU CN203606423U (en) | 2013-09-10 | 2013-09-10 | Three-channel three-type voltage monitor |
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| Publication Number | Publication Date |
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| CN203606423U true CN203606423U (en) | 2014-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320561829.XU Expired - Fee Related CN203606423U (en) | 2013-09-10 | 2013-09-10 | Three-channel three-type voltage monitor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771473A (en) * | 2015-11-24 | 2017-05-31 | 合肥亚飞电力设备有限公司 | A kind of voltage monitoring instrument |
-
2013
- 2013-09-10 CN CN201320561829.XU patent/CN203606423U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106771473A (en) * | 2015-11-24 | 2017-05-31 | 合肥亚飞电力设备有限公司 | A kind of voltage monitoring instrument |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140521 Termination date: 20180910 |