CN2847304Y - Three phase electronic leakage and electricity stealing detecting electric energy meter - Google Patents
Three phase electronic leakage and electricity stealing detecting electric energy meter Download PDFInfo
- Publication number
- CN2847304Y CN2847304Y CN 200520097783 CN200520097783U CN2847304Y CN 2847304 Y CN2847304 Y CN 2847304Y CN 200520097783 CN200520097783 CN 200520097783 CN 200520097783 U CN200520097783 U CN 200520097783U CN 2847304 Y CN2847304 Y CN 2847304Y
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- stealing
- electric leakage
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Abstract
The utility model relates to a three-phase electronic electricity leakage and stealing detecting electric energy meter which is formed by remanufacturing on the basis of a three-phase electronic energy meter. The utility model is characterized in that the inner of the three-phase electronic energy meter is also provided with an electricity leakage and stealing detecting circuit which is composed of a signal sampling circuit, a signal comparison circuit and an output circuit, wherein the signal sampling circuit is a zero-sequence current transformer of which the output end is connected with the input end of the signal comparison circuit, and the output end of the signal comparison circuit is connected with the input end of the output circuit of which the output signal is connected with a CPU control circuit. Because of the arrangement of the electricity leakage and stealing detecting circuit, the utility model can carry out real-time monitoring to loading condition, when the condition of electric leakage and theft occurs, the utility model can state the information of electricity utilization corresponding to the electric leakage and theft through the display of a digital tube after the electric leakage and theft is processed by the CPU control circuit. The metering accuracy of the utility model is the first level and the whole power consumption of each phase is less than 0.8W.
Description
Technical field
The utility model belongs to a kind of electric energy metrical product, and particularly a kind of three-phase electronic electric leakage/stealing detects electric energy meter.
Background technology
Three phases electronic energy meter only has only the electric energy metrical function in the market, but when detecting the user if desired whether electric leakage/electricity filching behavior being arranged, must install the isolated plant that detects electric leakage/stealing additional, has so both increased cost, has to be unfavorable for installation.
Summary of the invention
The purpose of this utility model provides a kind of user security, makes things convenient for electricity consumption, and takes precautions against the three-phase electronic electric leakage/stealing detection electric energy meter of the illegal stealing of user, to overcome above-mentioned deficiency.
To achieve these goals, the utility model converts on the basis of three phases electronic energy meter, wherein three phases electronic energy meter is made of shell and the metering units be made up of power circuit, cpu control circuit, storer, LED charactron display circuit and ic for energy metering, cpu control circuit, storer, LED charactron display circuit and ic for energy metering are integrated on the pcb board, whole pcb board is contained in the cover shell, fix with self-tapping screw, be characterized in: in three phases electronic energy meter, also be provided with an electric leakage/stealing testing circuit;
Above-mentioned electric leakage/stealing testing circuit is made of signal sample circuit, signal comparator circuit and output circuit, wherein signal sample circuit is a zero sequence current mutual inductor, the zero sequence current mutual inductor output terminal links to each other with the input end of signal comparator circuit, the output of signal comparator circuit links to each other with the input end of output circuit, and the output signal of output circuit is connected with cpu control circuit.
Because the utility model is provided with electric leakage/stealing testing circuit, monitors loading condition in real time, take place if any electric leakage/stealing situation, after cpu control circuit is handled, show the power information that corresponding electric leakage/stealing is described by charactron.The utility model measuring accuracy is 1 grade, and Overall Power Consumption is every less than 0.8W.
Description of drawings
Fig. 1 is a structured flowchart of the present utility model.
Fig. 2 is the utility model embodiment electric leakage/stealing testing circuit schematic diagram.
Fig. 3 uses example 1 theory diagram for the utility model.
Fig. 3 uses example 2 theory diagrams for the utility model.
Among the figure: 1-metering units, 2-electric leakage/stealing testing circuit, 3-electrical appliance, 4-zero sequence current mutual inductor, 5-luminotron.
Embodiment
The utility model will be further described below in conjunction with drawings and Examples.
Principle of work of the present utility model is: during user power utilization, utilize the active power of electric energy metrical unit 1 real-time sensing lead and be converted to the pulse signal corresponding with power, leak electricity simultaneously/the stealing detection; Cpu control circuit passes through to handle, and on the LED charactron data presentation is come out in real time; The power failure data are not lost.
The electric leakage of the utility model embodiment/stealing testing circuit 2 is by signal sample circuit, signal comparator circuit and output circuit constitute, wherein signal sample circuit is a zero sequence current mutual inductor 4, zero sequence current mutual inductor 4 is arranged on the end of incoming cables of electric energy meter, the output of zero sequence current mutual inductor 4 is given by resistor R 1 by voltage signal of rectification circuit Z output, the comparator circuit that R2 constitutes, the base stage of triode BG in the output of comparator circuit and the output circuit links to each other, the collector of triode BG joins by resistor R and power supply E positive pole, the collector of triode BG also is connected with metering units 1, and the emitter of triode BG is connected with power supply E negative pole by light emitting diode 5.
The principle of work of electric leakage of the present utility model/stealing testing circuit is: when the normal electricity consumption of user, the zero-sequence current that passes in the electricity consumption loop of zero sequence current mutual inductor 4 is almost nil; If line electrical leakage/stealing makes in the electricity consumption loop and produces zero-sequence current, then zero sequence current mutual inductor 4 can induce voltage signal.When this voltage signal is higher than the comparator circuit that is made of resistor R 1, R2 and preestablishes electric leakage/stealing magnitude of voltage, appearance electric leakage/stealing in this moment of the electricity consumption loop is described, triode BG conducting this moment, diode 5 conductings are luminous, triode BG gives low level signal of cpu control circuit by emitter simultaneously, and electric energy meter will be indicated electric leakage/stealing automatically.
Electric leakage of the present utility model/stealing testing circuit not only is confined to the above embodiments; the above-mentioned functions of electric leakage/stealing testing circuit can realize to(for) this area professional and technical personnel is too many; so in this instructions, just do not need to describe one by one, all belong to protection domain of the present utility model in electric energy meter but electric leakage/stealing testing circuit is set.
Common electric leakage/stealing mode is seen Fig. 3 and Fig. 4.Electrical appliance 3 is arranged on before the electric energy meter in Fig. 3, feasible three-phase and four-line electricity A, B, C, 0 imbalance that enters electric energy meter, then zero sequence current mutual inductor 4 can induce voltage signal, and electric energy meter will be indicated electric leakage/stealing automatically, and the appearance electric leakage/stealing in this moment of the electricity consumption loop is described; As a same reason, in Fig. 4, will enter the direct mutually A short circuit mutually of exporting of A of electric energy meter with electric energy meter, make that the three-phase and four-line electricity that enters electric energy meter is uneven, then zero sequence current mutual inductor 4 can induce voltage signal, electric energy meter will be indicated electric leakage/stealing automatically, and the appearance electric leakage/stealing in this moment of the electricity consumption loop is described.
The content that is not described in detail in this instructions belongs to this area professional and technical personnel's known prior art.
Claims (3)
1, a kind of three-phase electronic electric leakage/stealing detects electric energy meter, it converts on the basis of three phases electronic energy meter, wherein three phases electronic energy meter is by shell with by power circuit, cpu control circuit, storer, LED charactron display circuit, the metering units that ic for energy metering is formed constitutes, cpu control circuit, storer, LED charactron display circuit and ic for energy metering are integrated on the pcb board, whole pcb board is contained in the cover shell, fix with self-tapping screw, it is characterized in that: in three phases electronic energy meter, also be provided with an electric leakage/stealing testing circuit.
2, three-phase electronic electric leakage/stealing as claimed in claim 1 detects electric energy meter, it is characterized in that: electric leakage/stealing testing circuit is made of signal sample circuit, signal comparator circuit and output circuit, wherein signal sample circuit is a zero sequence current mutual inductor, the zero sequence current mutual inductor output terminal links to each other with the input end of signal comparator circuit, the output of signal comparator circuit links to each other with the input end of output circuit, and the output signal of output circuit is connected with cpu control circuit.
3, three-phase electronic electric leakage/stealing as claimed in claim 2 detects electric energy meter, it is characterized in that: zero sequence current mutual inductor (4) is arranged on the end of incoming cables of electric energy meter, the output of zero sequence current mutual inductor 4 is given by resistor (R1) by voltage signal of rectification circuit (Z) output, (R2) comparator circuit of Gou Chenging, the base stage of the triode (BG) in the output of comparator circuit and the output circuit links to each other, the collector of triode (BG) joins by resistor (R) and power supply (E) positive pole, the collector of triode (BG) also is connected with metering units (1), and the emitter of triode (BG) is connected with power supply (E) negative pole by light emitting diode (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520097783 CN2847304Y (en) | 2005-08-24 | 2005-08-24 | Three phase electronic leakage and electricity stealing detecting electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520097783 CN2847304Y (en) | 2005-08-24 | 2005-08-24 | Three phase electronic leakage and electricity stealing detecting electric energy meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2847304Y true CN2847304Y (en) | 2006-12-13 |
Family
ID=37512728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520097783 Expired - Fee Related CN2847304Y (en) | 2005-08-24 | 2005-08-24 | Three phase electronic leakage and electricity stealing detecting electric energy meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2847304Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102761173A (en) * | 2012-06-15 | 2012-10-31 | 王成楷 | Intelligent electric meter with functions of leakage remote monitoring and protection |
| CN101741059B (en) * | 2009-12-31 | 2012-11-21 | 嘉兴市永信电子有限公司 | Intelligent electronic leakage protector |
| CN108169545A (en) * | 2018-02-27 | 2018-06-15 | 南方电网科学研究院有限责任公司 | Discharge counting circuit and discharge counter |
-
2005
- 2005-08-24 CN CN 200520097783 patent/CN2847304Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101741059B (en) * | 2009-12-31 | 2012-11-21 | 嘉兴市永信电子有限公司 | Intelligent electronic leakage protector |
| CN102761173A (en) * | 2012-06-15 | 2012-10-31 | 王成楷 | Intelligent electric meter with functions of leakage remote monitoring and protection |
| CN102761173B (en) * | 2012-06-15 | 2014-09-03 | 王成楷 | Intelligent electric meter with functions of leakage remote monitoring and protection |
| CN108169545A (en) * | 2018-02-27 | 2018-06-15 | 南方电网科学研究院有限责任公司 | Discharge counting circuit and discharge counter |
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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: 20061213 Termination date: 20120824 |