CN2932393Y - Current transformer detecting and switching device - Google Patents
Current transformer detecting and switching device Download PDFInfo
- Publication number
- CN2932393Y CN2932393Y CN 200620026960 CN200620026960U CN2932393Y CN 2932393 Y CN2932393 Y CN 2932393Y CN 200620026960 CN200620026960 CN 200620026960 CN 200620026960 U CN200620026960 U CN 200620026960U CN 2932393 Y CN2932393 Y CN 2932393Y
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- CN
- China
- Prior art keywords
- mutual inductor
- switching device
- checkout
- current transformer
- hollow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Measurement Of Resistance Or Impedance (AREA)
Abstract
The utility model relates to a checkout shifter for current transformers, comprising a hollow transformer, resistors, relays and a computer. The two ends of the hollow transformer are connected with the two ends of the branch circuit which is formed by serially connected resistors and relays. The two ends of the hollow transformer carry the signal output to the computer. Due to the adoption of the checkout shifter which has a hollow transformer, resistors in parallel and a switching circuit, the utility model can achieve a wide checkout current range of 400 A - 10000 A, a high checkout precision of +-1%, and a fine measure linearity without magnetic saturation.
Description
Affiliated technical field
The utility model belongs to a kind of current sensing means, particularly relates to a kind of current transformer and detects switching device shifter.
Background technology
Current transformer unshakable in one's determination is arranged at work in order to solve the narrow technical matters of detection range of current of existence at present known, for example when detecting electric current, if adopted hollow mutual inductor at 100A～10000A.Then be directly with the hollow mutual inductor output signal as sampled signal.Require the defective that to measure because detection signal voltage is excessive to occur under the very wide situation for a kind of current measuring range like this; Even in the allowed band of mutual inductor, generally also can appearring in the electric current height of measuring, the Super-Current Measurement error becomes big problem.If adopt a plurality of mutual inductors to measure, with regard to the mutual inductors that the need several different sizes use that cooperatively interacts, testing circuit complexity, volume are multiplied has also increased cost.
Summary of the invention
The utility model for solve the technical matters that exists in the known technology provide a kind of simple in structure, volume is little, easy to detect, precision is high, the current transformer that can detect in very wide range of current detects switching device shifter.
The technical scheme that the utility model is taked for the technical matters that exists in the solution known technology is: it includes hollow mutual inductor, also includes resistance, relay and computing machine; The two ends of described hollow mutual inductor link to each other with the two ends of series branch's circuit of being made up of described each resistance and relay; Computing machine is exported to its signal in the two ends of described hollow mutual inductor.
The utility model can also adopt following technical measures:
Described computing machine can be single-chip microcomputer, industrial control computer or PLC.
Advantage and the good effect that the utlity model has are: owing to adopted hollow mutual inductor to add the detection switching device shifter of resistance in parallel and commutation circuit, can reach 400A～10000A so detect range of current, accuracy of detection can reach ± and 1%, measure linear does not have the magnetic saturation phenomenon well.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
For further understanding summary of the invention of the present utility model, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:
As shown in Figure 1, A1, A2 are the input end of transformer T2, and it is the circuit that flows through load R1 electric current to be detected that transformer T2 reaches the circuit that constitutes with load R1, and its circuit lead passes the hollow of hollow mutual inductor L.Two normally opened contacts of parallel resistance R2 process relay J are parallel to the two ends of hollow mutual inductor L, and the two ends of hollow mutual inductor L also link to each other with B1, the B2 of computer PC; When measuring electric current hour, the signal that mutual inductor L produces directly outputs to B1, the B2 end of computer PC; Arrive computer-chronograph PC in another grade scope and make resistance R 2 incorporate the two ends of hollow mutual inductor L into when measuring electric current, be reduced in the scope that is fit to the PC measurement to reach the signal that mutual inductor L is produced with regard to the normally opened contact closure of trigger relay J.Wherein relay J is controlled by computer PC.Adjust the electric current conversion scale of mutual inductor L according to corresponding program at the simultaneous computer PC of convert resistance R2.
When range of current is very wide, can also carry out many grades of resistance R 3, R4, R5 according to actual conditions ... switching, when electric current reaches a certain scope, will trigger corresponding relays J1, J2, J3 ... switch to corresponding resistance R 3, R4, R5 ..., to realize the more measurement of wide-range current.
Described computing machine can be single-chip microcomputer, industrial control computer or PLC.
The utility model also can be by manually-operated and conversion substituting for computer.
Claims (2)
1. a current transformer detects switching device shifter, and it includes hollow mutual inductor, it is characterized in that: also include resistance, relay and computing machine; The two ends of described hollow mutual inductor link to each other with the two ends of series branch's circuit of being made up of described each resistance and relay; Computing machine is exported to its signal in the two ends of described hollow mutual inductor.
2. current transformer according to claim 1 detects switching device shifter, and it is characterized in that: described computing machine can be single-chip microcomputer, industrial control computer or PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620026960 CN2932393Y (en) | 2006-08-08 | 2006-08-08 | Current transformer detecting and switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620026960 CN2932393Y (en) | 2006-08-08 | 2006-08-08 | Current transformer detecting and switching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2932393Y true CN2932393Y (en) | 2007-08-08 |
Family
ID=38348890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620026960 Expired - Fee Related CN2932393Y (en) | 2006-08-08 | 2006-08-08 | Current transformer detecting and switching device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2932393Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323775A (en) * | 2011-05-31 | 2012-01-18 | 北京七星华创电子股份有限公司 | Circuit signal monitoring device and method |
| CN102809678A (en) * | 2012-08-03 | 2012-12-05 | 江苏林洋电子股份有限公司 | Device for improving current sampling linear range and electric energy measuring accuracy of electric energy meter |
| CN105372469A (en) * | 2014-08-13 | 2016-03-02 | 浙江巨磁智能技术有限公司 | Method for adjusting measuring range of current sensor and sensor utilizing the method |
| CN106291080A (en) * | 2016-08-17 | 2017-01-04 | 云南电网有限责任公司电力科学研究院 | A kind of voltage acquisition Apparatus and method for |
-
2006
- 2006-08-08 CN CN 200620026960 patent/CN2932393Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323775A (en) * | 2011-05-31 | 2012-01-18 | 北京七星华创电子股份有限公司 | Circuit signal monitoring device and method |
| CN102809678A (en) * | 2012-08-03 | 2012-12-05 | 江苏林洋电子股份有限公司 | Device for improving current sampling linear range and electric energy measuring accuracy of electric energy meter |
| CN102809678B (en) * | 2012-08-03 | 2014-07-23 | 江苏林洋电子股份有限公司 | Device for improving current sampling linear range and electric energy measuring accuracy of electric energy meter |
| CN105372469A (en) * | 2014-08-13 | 2016-03-02 | 浙江巨磁智能技术有限公司 | Method for adjusting measuring range of current sensor and sensor utilizing the method |
| CN106291080A (en) * | 2016-08-17 | 2017-01-04 | 云南电网有限责任公司电力科学研究院 | A kind of voltage acquisition Apparatus and method for |
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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: 20070808 Termination date: 20110808 |