CN204789669U - Current sampling circuit - Google Patents
Current sampling circuit Download PDFInfo
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- CN204789669U CN204789669U CN201520460870.7U CN201520460870U CN204789669U CN 204789669 U CN204789669 U CN 204789669U CN 201520460870 U CN201520460870 U CN 201520460870U CN 204789669 U CN204789669 U CN 204789669U
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- resistance
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Abstract
The utility model provides a connect the 5th resistance and the 6th resistance on first sampling line and the second sampling line, the electric current just can not be to first resistance and second resistance direction flow of current sampling circuit, at copper -manganese shunt connector to it normally measures to influence the electric energy meter, the 5th resistance and the 6th resistance have been increased for the electric current can prevent effectively from the 5th resistance and the mobile input to power transformer of the 6th resistance orientation that smart electric meter's measurement from hurrying up or not walking the phenomenon, and metering error can satisfy the national standard required precision under fundamental current, voltage, simultaneously can the accurate measurement electric flux that the user consumed, reduce various economic disputes and energy metering loss.
Description
Technical field
The utility model relates to Electric Energy Metering Technology field, is specifically related to a kind of current sampling circuit.
Background technology
Intelligent electric meter is the intelligent terminal of intelligent grid, it has not been traditional electric energy meter, intelligent electric meter except possessing the function of measuring of traditional electric energy meter basic electricity amount, in order to adapt to intelligent grid and new forms of energy use it also there is the intelligentized function such as bidirectional data communication function, anti-stealing electricity function of two-way multiple rate function of measuring, user side controlling functions, plurality of data transmission modes.
The most important condition of the electric energy metrical accuracy of intelligent electric meter is the accuracy of sampling, and current intelligent electric meter internal sample is all adopt copper-manganese mode to carry out current sample substantially, not only can Sample AC component but also DC component of can sampling, ensure to measure normally; But the live wire on copper-manganese is as the ground wire of intelligent electric meter, when the live wire on copper-manganese have come off do not connect time, intelligent electric meter will accurate-metering, and error amount even will reach 99.9%, cannot meet the accuracy requirements of 2 grades of tables of current state net product.
Because intelligent electric meter is measuring products, great quality problems can not be belonged to by accurate-metering, once occur, just economic dispute can be produced, serious meeting causes lawsuit, and problems there is no good solution at present, perplexs manufacturing enterprise and State Grid Corp. of this industry always.
Utility model content
The purpose of this utility model live wire be to provide on copper-manganese comes off intelligent electric meter when not connecting still can a kind of current sampling circuit of accurate-metering.
The utility model is achieved through the following technical solutions: a kind of current sampling circuit, comprise metering units, manganese copper diverter, power transformer, the first sample line, the second sample line, power supply output module, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, wherein the first sample sample line and the second sample line are connected on manganese copper diverter, and described manganese copper diverter connects live wire input end; Described first sample sample line connects one end of described first resistance, and the other end of described first resistance connects one end of described 3rd resistance, the other end ground connection of described 3rd resistance; One end that described second sample line connects one end of described second resistance, the other end of described second resistance connects described 4th resistance, the other end ground connection of described 4th resistance; The other end of described first resistance is also connected described metering units with the other end of described second resistance; The output terminal of described power transformer is connected with power supply output module, described first sample line also connects one end of the 5th resistance, described second sample line also connects one end of the 6th resistance, the other end ground connection of described 5th resistance and the 6th resistance, one end ground connection of the input end of described power transformer, another terminal connecting zero line input end of the input end of described power transformer; The chip that described metering units adopts is BL6523 example, and also example is seemingly for other computation chip.
The electric energy metrical of intelligent electric meter is mainly multiplied the voltage and current signal of input according to the time, obtain power along with accumulated time to measure; And live wire on manganese copper diverter is as the ground wire of intelligent electric meter, coming off once live wire does not connect, and intelligent electric meter will accurate-metering; And the first sample line connects one end of the 5th resistance, the second sample line connects one end of the 6th resistance, the other end ground connection of the 5th resistance and the 6th resistance, one end ground connection of power transformer input end, another terminal connecting zero line input end of power transformer input end; The first sample line and the second sample line that manganese copper diverter connects are connected the 5th resistance and the 6th resistance, and electric current to the first resistance and the second resistive square to stream, thus would not affect the normal metering of intelligent electric energy; Add the 5th resistance and the 6th resistance, make electric current from the 5th resistance and the 6th resistive square to the input end flowing to power transformer, can effectively prevent the metering of intelligent electric meter from hurrying up or not walking phenomenon; And error in dipping is under fundamental current, voltage, national standard accuracy requirement can be met, simultaneously can the electric flux that consumes of accurate-metering user, reduce various economic dispute and energy measurement loses.
Usefulness of the present utility model is: the live wire 1) on copper-manganese has and comes off when not connecting, and still normally can measure, avoid various economic dispute, and error in dipping be little, meet the accuracy requirement of national standard; 2) significantly do not raise the cost, only on available circuit, adding two resistance, without the need to revising in a large number, providing cost savings; 3) product reliability promotes, and the live wire no matter on copper-manganese comes off or do not come off, and normally can measure, substantially increase the stability of product.
Accompanying drawing explanation
Fig. 1 is the simplification circuit that intelligent electric meter copper-manganese sample line normally connects.
Fig. 2 is simplification circuit when live wire comes off on intelligent electric meter copper-manganese.
Fig. 3 is the simplification circuit that the utility model improves.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is further described.
A kind of current sampling circuit, comprise metering units, manganese copper diverter, power transformer, the first sample line, the second sample line, power supply output module, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, wherein the first sample sample line and the second sample line are connected on manganese copper diverter, and described manganese copper diverter connects live wire input end; Described first sample sample line connects one end of described first resistance, and the other end of described first resistance connects one end of described 3rd resistance, the other end ground connection of described 3rd resistance; One end that described second sample line connects one end of described second resistance, the other end of described second resistance connects described 4th resistance, the other end ground connection of described 4th resistance; The other end of described first resistance is also connected described metering units with the other end of described second resistance; The output terminal of described power transformer is connected with power supply output module, described first sample line also connects one end of the 5th resistance, described second sample line also connects one end of the 6th resistance, the other end ground connection of described 5th resistance and the 6th resistance, one end ground connection of the input end of described power transformer, another terminal connecting zero line input end of the input end of described power transformer; The chip that described metering units adopts is BL6523 example, and also example is seemingly for other computation chip; The Standard resistance range of described 5th resistance and the 6th resistance is between 5 Europe to 1000 Europe.
The first sample line that manganese copper diverter connects with the second sample line is connected the 5th resistance and the 6th resistance, electric current would not to the first resistance and the second resistive square to stream, thus affect electric energy meter and normally measure; Add the 5th resistance and the 6th resistance, make electric current from the 5th resistance and the 6th resistive square to the input end flowing to power transformer, can effectively prevent the metering of intelligent electric meter from hurrying up or not walking phenomenon; And error in dipping is under fundamental current, voltage, national standard accuracy requirement can be met, simultaneously can the electric flux that consumes of accurate-metering user, reduce various economic dispute and energy measurement loses.
Embodiment 1:
Fundamental error test (before improving circuit)
Fundamental error test (after improving circuit)
Embodiment 2:
On copper-manganese live wire come off after fundamental error test (improve before circuit)
On copper-manganese live wire come off after fundamental error test (improve after circuit)
Protection domain of the present utility model includes but not limited to above embodiment; protection domain of the present utility model is as the criterion with claims, and any replacement that those skilled in the art will find apparent that, distortion, improvement made this technology all falls into protection domain of the present utility model.
Claims (2)
1. a current sampling circuit, comprise metering units, manganese copper diverter, power transformer, the first sample line, the second sample line, power supply output module, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, wherein the first sample sample line and the second sample line are connected on manganese copper diverter, and described manganese copper diverter connects live wire input end; Described first sample sample line connects one end of described first resistance, and the other end of described first resistance connects one end of described 3rd resistance, the other end ground connection of described 3rd resistance; One end that described second sample line connects one end of described second resistance, the other end of described second resistance connects described 4th resistance, the other end ground connection of described 4th resistance; The other end of described first resistance is also connected described metering units with the other end of described second resistance; The output terminal of described power transformer is connected with power supply output module, it is characterized in that: described first sample line also connects one end of the 5th resistance, described second sample line also connects one end of the 6th resistance, the other end ground connection of described 5th resistance and the 6th resistance, one end ground connection of the input end of described power transformer, another terminal connecting zero line input end of the input end of described power transformer.
2. a kind of current sampling circuit according to claim 1, is characterized in that: the chip that described metering units adopts is BL6523 example.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520460870.7U CN204789669U (en) | 2015-06-29 | 2015-06-29 | Current sampling circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520460870.7U CN204789669U (en) | 2015-06-29 | 2015-06-29 | Current sampling circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204789669U true CN204789669U (en) | 2015-11-18 |
Family
ID=54529686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520460870.7U Withdrawn - After Issue CN204789669U (en) | 2015-06-29 | 2015-06-29 | Current sampling circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204789669U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104977444A (en) * | 2015-06-29 | 2015-10-14 | 宁波三星智能电气有限公司 | Current sampling circuit |
| CN106093836A (en) * | 2016-06-22 | 2016-11-09 | 宁波三星医疗电气股份有限公司 | A kind of table meter power circuit |
| CN106918738A (en) * | 2015-12-28 | 2017-07-04 | 上海贝岭股份有限公司 | The metering control system of current divider in electric energy meter |
| CN108254600A (en) * | 2018-02-23 | 2018-07-06 | 南京飞腾电子科技有限公司 | Electric energy meter |
-
2015
- 2015-06-29 CN CN201520460870.7U patent/CN204789669U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104977444A (en) * | 2015-06-29 | 2015-10-14 | 宁波三星智能电气有限公司 | Current sampling circuit |
| CN104977444B (en) * | 2015-06-29 | 2017-12-12 | 宁波三星智能电气有限公司 | A kind of current sampling circuit |
| CN106918738A (en) * | 2015-12-28 | 2017-07-04 | 上海贝岭股份有限公司 | The metering control system of current divider in electric energy meter |
| CN106918738B (en) * | 2015-12-28 | 2020-08-25 | 上海贝岭股份有限公司 | Metering control system of shunt in electric energy meter |
| CN106093836A (en) * | 2016-06-22 | 2016-11-09 | 宁波三星医疗电气股份有限公司 | A kind of table meter power circuit |
| CN108254600A (en) * | 2018-02-23 | 2018-07-06 | 南京飞腾电子科技有限公司 | Electric energy meter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151118 Effective date of abandoning: 20171212 |
|
| AV01 | Patent right actively abandoned |