CN204086353U - A kind of Anti-fraudulent use electrisity of three line inputs - Google Patents
A kind of Anti-fraudulent use electrisity of three line inputs Download PDFInfo
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- CN204086353U CN204086353U CN201420598113.1U CN201420598113U CN204086353U CN 204086353 U CN204086353 U CN 204086353U CN 201420598113 U CN201420598113 U CN 201420598113U CN 204086353 U CN204086353 U CN 204086353U
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- current
- input end
- transformer
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- current transformer
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Abstract
The utility model discloses a kind of Anti-fraudulent use electrisity of three line inputs, comprise three current transformers, a voltage transformer (VT), comparing unit, processing unit, stealing Tip element, first gather and be connected to live wire, ground wire, current signal between the current transformer of zero line, contrasted by comparing unit again, output to processing unit to process, thus determine that whether electric energy meter can also be determined by the position of stealing by stealing, the utility model not only realizes anti-electricity-theft function on the single-phase electric energy meter with 5 terminal three line inputs, and use comparer to compare the electric current gathered from three end current transformers, comparatively prior art can judge whether electric energy meter exists electricity filching behavior fast, take resource few, and shown by light emitting diode, user can be conveniently allowed to know stealing situation.
Description
Technical field
The utility model relates to electronic surveying field, the Anti-fraudulent use electrisity of particularly a kind of three line inputs.
Background technology
Electric energy meter applied range now, for electric energy valuation provides approach easily, but in a lot of local bad phenomenon that all there is stealing, traditional anti-electricity-theft mode is nothing but two kinds, and one is outside thief-proof, is avoided the generation of stealing electricity phenomenon by snap close or some physical means, another kind is thief-proof by inside, realize thief-proof by electric circuit inspection means, but often circuit realiration is comparatively complicated, cost is higher.And in states such as Southeast Asia and Africa because a kind of single-phase electric energy meter with 5 terminal three line inputs has appearred in the needs of generating and transmission of electricity, existing anti-theft electricity technology does not support that this has the single-phase electric energy meter of 5 terminal three line inputs.
Utility model content
In view of this, the utility model needs the problem solved to be to provide one to be applicable to having 5 terminal three lines input electric energy meters and to realize anti-stealing electricity function and the comparatively simple single-phase electric energy meter of implementation.
In order to solve the problem, the utility model adopts following technological means:
An Anti-fraudulent use electrisity for three line inputs, electric energy meter is provided with live wire input end, fire wire output end, ground terminal, zero line input end, zero line output terminal, it is characterized in that: comprise
Three current transformers, comprise the first current transformer, the second current transformer, the 3rd current transformer, are located between live wire input end and fire wire output end, between earth terminal and zero line input end, between zero line input end and zero line output terminal respectively;
One voltage transformer (VT), described voltage transformer (VT) is connected between live wire and zero line;
Also comprise
Comparing unit, comprise first to compare input end, second and compare input end, the 3rd and compare input end, described first compares the output terminal that input end connects the first current transformer and the second current transformer, second compares the output terminal that input end connects the first current transformer and the second current transformer, 3rd compares the output terminal that input end connects the second current transformer and the 3rd current transformer, and described comparing unit output terminal outputs to processing unit.
Processing unit, described processing unit is by being connected with comparing unit and then judging that whether ammeter is by stealing according to signal.
Stealing Tip element, described processing unit by Signal transmissions to Tip element in order to point out electric energy meter by stealing situation.
Preferably, described first current transformer and voltage transformer (VT) are manganese-copper transformer.
Preferably, described comparing unit comprises three current-to-voltage converting circuits and voltage comparator that connect one to one with current transformer respectively, current value is changed into magnitude of voltage respectively by current-to-voltage converting circuit corresponding with it and is input to voltage comparator by three current transformers, and voltage comparator according to magnitude of voltage size relatively and result level is outputted to processing unit.
Preferably, described current-to-voltage converting circuit comprises the first transport and placing device, the first current-limiting resistance and the second current-limiting resistance, described first transport and placing device in-phase input end is by the first current-limiting resistance ground connection, and the first transport and placing device inverting input is connected with output terminal by the second current-limiting resistance.
Preferably, described stealing Tip element comprises three light emitting diodes, three current-limiting resistances, and described each light emitting diode input end is connected with Vcc, and output terminal is connected with processing unit by current-limiting resistance.
Compared with prior art, the utility model not only realizes anti-electricity-theft function on the single-phase electric energy meter with 5 terminal three line inputs, and use comparer to compare the electric current gathered from three end current transformers, comparatively prior art can judge whether electric energy meter exists electricity filching behavior fast, take resource few, and shown by light emitting diode, can conveniently allow user know stealing situation.
Accompanying drawing explanation
Fig. 1 is the overall technical architecture schematic diagram of electric energy meter embodiment described in the utility model;
Fig. 2 is the mutual inductor distribution schematic diagram of electric energy meter embodiment described in the utility model;
Fig. 3 is the comparing unit circuit structure diagram of electric energy meter embodiment described in the utility model.
Embodiment
Conveniently allow those skilled in the art understand the utility model content, below in conjunction with the accompanying drawings and the specific embodiments the utility model content is described in further detail.
Fig. 1 is the overall technical architecture schematic diagram of electric energy meter embodiment described in the utility model; Fig. 2 is the mutual inductor distribution schematic diagram of electric energy meter embodiment described in the utility model; Fig. 3 is the comparing unit circuit structure diagram of electric energy meter embodiment described in the utility model.
As shown in Figure 1, electric energy meter described in the present embodiment comprises 5 terminals, is live wire input end L respectively
in, fire wire output end L
out, ground terminal G, zero line input end N
in, zero line output terminal N
out,
Circuit is made up of general meter circuit, the first current transformer 1, second current transformer 2, the 3rd current transformer 3 has been set up in the utility model, be located between live wire input end and fire wire output end, between earth terminal and zero line input end, between zero line input end and zero line output terminal respectively, for gathering the current signal of live wire, ground wire and zero line; Also comprise a voltage transformer (VT) 4, this voltage transformer (VT) 4 is connected between live wire and zero line, and output terminal is connected to processing unit, for gathering the voltage signal between live wire and zero line.Preferably, the first current transformer 1 and voltage transformer (VT) 4 use copper-manganese as mutual inductor material, and the relative other materials of copper-manganese material has resistance stability can the advantage of good and low resistance temperature coefficient.
As shown in Figure 2, the utility model has also set up the comparing unit for voltage difference between more different current signal, processing unit and in order to point out electric energy meter by the stealing Tip element of stealing situation.
Comparing unit is connected between current transformer to processing unit, comprise first to compare input end, second and compare input end, the 3rd and compare input end, comparing unit comprises three current-to-voltage converting circuits and voltage comparator that connect one to one with current transformer respectively, current value is changed into magnitude of voltage respectively by current-to-voltage converting circuit corresponding with it and is input to voltage comparator by three current transformers, and voltage comparator according to magnitude of voltage size relatively and result level is outputted to processing unit.
Concrete, current-to-voltage converting circuit comprises the first transport and placing device, the first current-limiting resistance R1/R2/R3 and the second current-limiting resistance R4/R5/R6, described first transport and placing device in-phase input end is by the first current-limiting resistance R1/R2/R3 ground connection, and the first transport and placing device inverting input is connected with output terminal by the second current-limiting resistance R4/R5/R6.
The voltage comparator that model is LM339 is used in the present embodiment, it first compares output terminals A, the B that input end connects the first current transformer 1 and the second current transformer 2, second compares output terminal B, C that input end connects the second current transformer 2 and the 3rd current transformer 3, and the 3rd compares output terminals A, the C that input end connects the first current transformer 1 and the 3rd current transformer 3.Voltage comparator first output terminal, the second output terminal and the 3rd output end signal all output to processing unit and process.
In the judgement processing procedure of processing unit,
The then N when the second current transformer 2 is equal with the 3rd current transformer 3 induction current
inline breaks;
When the induction current of the 3rd current transformer 3 is 0, then judge that G line breaks;
When the induction current of the 3rd current transformer 3 is just the second current transformer 2 induction current half time, then can judge G line and N
inline short circuit;
When the electric current of the first current transformer 1 is less than the electric current that the second current transformer 2 responds to, then can judge the bypass of L line;
When the electric current of the first current transformer 1 is greater than the electric current that the second current transformer 2 responds to, then can judge bypass or N in load
outline and N
in(G) line short circuit.
Stealing Tip element comprises three light emitting diodes and three current-limiting resistances, described each light emitting diode input end is connected with Vcc, output terminal is connected with processing unit by current-limiting resistance, and when processing unit is judged as live wire bypass, it is luminous that processing unit controls the first LED 1; When processing unit is judged as ground wire bypass, it is luminous that processing unit controls the second LED 2; When processing unit is judged as zero line bypass, it is luminous that processing unit controls the 3rd LED 3.
Compared with prior art, the utility model not only realizes anti-electricity-theft function on the single-phase electric energy meter with 5 terminal three line inputs, and use comparer to compare the electric current gathered from three end current transformers, comparatively prior art can judge whether electric energy meter exists electricity filching behavior fast, take resource few, and shown by light emitting diode, can conveniently allow user know stealing situation.
In the utility model, the not concrete functional module introduced all can adopt functional module ripe in prior art, is not repeated herein.
Above-described embodiment is only preferably implementation of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these apparent replacement forms all belong to protection domain of the present utility model.
Claims (5)
1. an Anti-fraudulent use electrisity for three line inputs, electric energy meter is provided with live wire input end, fire wire output end, ground terminal, zero line input end, zero line output terminal, it is characterized in that: comprise
Three current transformers, comprise the first current transformer, the second current transformer, the 3rd current transformer, are located between live wire input end and fire wire output end, between earth terminal and zero line input end, between zero line input end and zero line output terminal respectively;
One voltage transformer (VT), described voltage transformer (VT) is connected between live wire and zero line, and output terminal is connected with processing unit;
Also comprise
Comparing unit, comprise first to compare input end, second and compare input end, the 3rd and compare input end, described first compares the output terminal that input end connects the first current transformer and the second current transformer, second compares the output terminal that input end connects the first current transformer and the second current transformer, 3rd compares the output terminal that input end connects the second current transformer and the 3rd current transformer, and described comparing unit output terminal outputs to processing unit;
Processing unit, described processing unit is by being connected with comparing unit and then judging that whether ammeter is by stealing according to signal;
Stealing Tip element, described processing unit by Signal transmissions to Tip element in order to point out electric energy meter by stealing situation.
2. the Anti-fraudulent use electrisity of three line inputs according to claim 1, is characterized in that: described first current transformer and voltage transformer (VT) are manganese-copper transformer.
3. the Anti-fraudulent use electrisity of three line inputs according to claim 1, it is characterized in that: described comparing unit comprises three current-to-voltage converting circuits and voltage comparator that connect one to one with current transformer respectively, current value is changed into magnitude of voltage respectively by current-to-voltage converting circuit corresponding with it and is input to voltage comparator by three current transformers, and voltage comparator according to magnitude of voltage size relatively and result level is outputted to processing unit.
4. the Anti-fraudulent use electrisity of three line inputs according to claim 3, it is characterized in that: described current-to-voltage converting circuit comprises the first transport and placing device, the first current-limiting resistance and the second current-limiting resistance, described first transport and placing device in-phase input end is by the first current-limiting resistance ground connection, and the first transport and placing device inverting input is connected with output terminal by the second current-limiting resistance.
5. the Anti-fraudulent use electrisity of three line inputs according to claim 1, it is characterized in that, described stealing Tip element comprises three light emitting diodes, three current-limiting resistances, and described each light emitting diode input end is connected with Vcc, and output terminal is connected with processing unit by current-limiting resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420598113.1U CN204086353U (en) | 2014-10-16 | 2014-10-16 | A kind of Anti-fraudulent use electrisity of three line inputs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420598113.1U CN204086353U (en) | 2014-10-16 | 2014-10-16 | A kind of Anti-fraudulent use electrisity of three line inputs |
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| Publication Number | Publication Date |
|---|---|
| CN204086353U true CN204086353U (en) | 2015-01-07 |
Family
ID=52179054
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420598113.1U Expired - Fee Related CN204086353U (en) | 2014-10-16 | 2014-10-16 | A kind of Anti-fraudulent use electrisity of three line inputs |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526426A (en) * | 2016-11-24 | 2017-03-22 | 云南电网有限责任公司电力科学研究院 | Power distribution network fault analyzing system and method |
-
2014
- 2014-10-16 CN CN201420598113.1U patent/CN204086353U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526426A (en) * | 2016-11-24 | 2017-03-22 | 云南电网有限责任公司电力科学研究院 | Power distribution network fault analyzing system and method |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150107 Termination date: 20181016 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |