CN101566652A - Comprehensive tester of current-voltage transformation ratio polarity - Google Patents
Comprehensive tester of current-voltage transformation ratio polarity Download PDFInfo
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- CN101566652A CN101566652A CNA2008100253989A CN200810025398A CN101566652A CN 101566652 A CN101566652 A CN 101566652A CN A2008100253989 A CNA2008100253989 A CN A2008100253989A CN 200810025398 A CN200810025398 A CN 200810025398A CN 101566652 A CN101566652 A CN 101566652A
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- operational amplifier
- current transformer
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Abstract
The invention relates to a comprehensive tester of current-voltage transformation ratio polarity, in particular to a tester for the performance of a current transformer in a non-operating state. The tester comprises mutually connected singlechips, a rectifier circuit, an instruction input circuit, a display printing circuit, a testing circuit, an operational amplifier A, an operational amplifier B, A/D converters and an electronic transformer, wherein the rectifier circuit, the instruction input circuit, the display printing circuit and the testing circuit are connected with an external power supply; the testing circuit comprises a pressure-current booster transformer connected with a primary port of the current transformer to be tested; the operational amplifier A for outputting the CT change and the operational amplifier B for outputting the current-voltage characteristics and the polarity are connected with a secondary port of the current transformer to be tested; the A/D converters are respectively connected between each of the operational amplifiers and each singlechip; the electronic transformer is connected with the external power supply, and the output ports are respectively connected with the rectifier circuit and the pressure-current booster transformer. The invention improves the suitability, greatly improves the testing precision, has simple test wiring and is convenient to use.
Description
Technical field
The present invention relates to performance detection instrument under a kind of current transformer non-operating state, especially detect the tester of current transformer current-voltage transformation ratio polarity combination property under non-operating state.
Background technology
Comprehensive tester of current-voltage transformation ratio polarity (current transformer tester) is a kind of testing tool that detects current transformer quality, performance.Comprehensive tester of current-voltage transformation ratio polarity in the past, working voltage can only adopt 220V or 380V.In addition, in detection, the adjustment of rising current transformer, step-up transformer need manually be adjusted, and the low precision of adjustment is difficult to obtain accurate data.
Summary of the invention
The present invention is directed to above problem, a kind of energy self-adaptation external power source is provided, and can have realized rising current transformer, the self-adjusting comprehensive tester of current-voltage transformation ratio polarity of step-up transformer.
Technical scheme of the present invention is: comprise interconnective single-chip microcomputer, the rectification circuit that is connected with external power source, instruction input circuit, show print circuit, testing circuit, comprise in the testing circuit and tested current transformer once boosting of being connected of mouth, rising current transformer; Being used to of being connected with tested Current Transformer Secondary mouth exported the operational amplifier A of variation of CT and the operational amplifier B that is used to export volt-ampere characteristic, polarity, be connected the AD converter between operational amplifier and the single-chip microcomputer, also comprise an electronic transformer, electronic transformer is connected with external power source, and delivery outlet connects rectification circuit respectively and boosts, rising current transformer.
Boosting, be provided with the servomotor that drives up-flow, the operating-controlling mechanism that boosts action on the rising current transformer, servomotor connects single-chip microcomputer, stores the program of controlling servomotor action on up-flow, the step-up transformer according to instruction in the single-chip microcomputer.
The present invention externally is provided with electronic transformer behind the power interface, makes to the interference of instrument detecting precision, to have improved adaptability when having got rid of externally supply voltage instability by the outside different or unsettled voltage of instrument energy self-adaptation of the present invention.Boosting, be provided with on the rising current transformer servomotor that drives up-flow, the operating-controlling mechanism that boosts action, servomotor is controlled by single-chip microcomputer, thereby regulates detection stream magnitude of voltage, has changed instrument manual adjustments in the past, the defective that is difficult to the accurate measurement data has improved the precision that detects greatly.Test connection is simple, and is easy to use.
Description of drawings
Accompanying drawing is a schematic circuit of the present invention
The solid line hollow arrow is a signal transmission line among the figure, and the dotted line hollow arrow is the electric energy transmitting circuit, and the single line arrow is the instruction signal transmission line.
Embodiment
As shown in the figure, of the present inventionly comprise interconnective single-chip microcomputer, the rectification circuit that is connected with external power source, instruction input circuit, show print circuit, testing circuit, comprise in the testing circuit and tested current transformer once boosting of being connected of mouth, rising current transformer; Being used to of being connected with tested Current Transformer Secondary mouth exported the operational amplifier A of variation of CT and the operational amplifier B that is used to export volt-ampere characteristic, polarity, be connected the AD converter between operational amplifier and the single-chip microcomputer, also comprise an electronic transformer, electronic transformer is connected with external power source, and delivery outlet connects rectification circuit respectively and boosts, rising current transformer.
Boosting, be provided with the servomotor that drives up-flow, the operating-controlling mechanism that boosts action on the rising current transformer, servomotor connects single-chip microcomputer, stores the program of controlling servomotor action on up-flow, the step-up transformer according to instruction in the single-chip microcomputer.
Claims (2)
1, a kind of comprehensive tester of current-voltage transformation ratio polarity, comprise interconnective single-chip microcomputer, the rectification circuit that is connected with external power source, instruction input circuit, show print circuit, testing circuit, comprise in the testing circuit and tested current transformer once boosting of being connected of mouth, rising current transformer; Being used to of being connected with tested Current Transformer Secondary mouth exported the operational amplifier A of variation of CT and the operational amplifier B that is used to export volt-ampere characteristic, polarity, be connected the AD converter between operational amplifier and the single-chip microcomputer, it is characterized in that, also comprise an electronic transformer, electronic transformer is connected with external power source, and delivery outlet connects rectification circuit respectively and boosts, rising current transformer.
2, a kind of comprehensive tester of current-voltage transformation ratio polarity according to claim 1, it is characterized in that, boosting, be provided with on the rising current transformer servomotor that drives up-flow, the operating-controlling mechanism that boosts action, servomotor connects single-chip microcomputer, stores the program of controlling servomotor action on up-flow, the step-up transformer according to instruction in the single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100253989A CN101566652A (en) | 2008-04-25 | 2008-04-25 | Comprehensive tester of current-voltage transformation ratio polarity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100253989A CN101566652A (en) | 2008-04-25 | 2008-04-25 | Comprehensive tester of current-voltage transformation ratio polarity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101566652A true CN101566652A (en) | 2009-10-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100253989A Pending CN101566652A (en) | 2008-04-25 | 2008-04-25 | Comprehensive tester of current-voltage transformation ratio polarity |
Country Status (1)
| Country | Link |
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| CN (1) | CN101566652A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102539942A (en) * | 2011-12-12 | 2012-07-04 | 河南省电力公司洛阳供电公司 | Portable transformation ratio testing instrument of current transformer |
| CN102735951A (en) * | 2012-06-19 | 2012-10-17 | 扬州市双宝电力设备有限公司 | Full-automatic transformation ratio group tester |
| CN102955079A (en) * | 2012-10-27 | 2013-03-06 | 保定供电公司 | Portable-type high-voltage current transformer transformation-ratio measurement device |
| CN105319478A (en) * | 2014-06-30 | 2016-02-10 | 国家电网公司 | Un-disassembly polarity and transformation ratio testing method for transformer bushing |
| CN106255891A (en) * | 2014-07-02 | 2016-12-21 | 欧米克朗电子仪器有限公司 | For testing the method and device of the tap transducer of transformator |
| CN107728092A (en) * | 2017-10-02 | 2018-02-23 | 国网山西省电力公司电力科学研究院 | The automatic precision pre-check device and method of calibration of Transformer Winding no-load voltage ratio tester |
-
2008
- 2008-04-25 CN CNA2008100253989A patent/CN101566652A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102539942A (en) * | 2011-12-12 | 2012-07-04 | 河南省电力公司洛阳供电公司 | Portable transformation ratio testing instrument of current transformer |
| CN102735951A (en) * | 2012-06-19 | 2012-10-17 | 扬州市双宝电力设备有限公司 | Full-automatic transformation ratio group tester |
| CN102735951B (en) * | 2012-06-19 | 2016-09-14 | 扬州海沃电气科技发展有限公司 | Full-automatic transformation ratio group tester |
| CN102955079A (en) * | 2012-10-27 | 2013-03-06 | 保定供电公司 | Portable-type high-voltage current transformer transformation-ratio measurement device |
| CN105319478A (en) * | 2014-06-30 | 2016-02-10 | 国家电网公司 | Un-disassembly polarity and transformation ratio testing method for transformer bushing |
| CN106255891A (en) * | 2014-07-02 | 2016-12-21 | 欧米克朗电子仪器有限公司 | For testing the method and device of the tap transducer of transformator |
| CN107728092A (en) * | 2017-10-02 | 2018-02-23 | 国网山西省电力公司电力科学研究院 | The automatic precision pre-check device and method of calibration of Transformer Winding no-load voltage ratio tester |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Open date: 20091028 |