CN203178465U - Electronic transformer output calibration device - Google Patents
Electronic transformer output calibration device Download PDFInfo
- Publication number
- CN203178465U CN203178465U CN 201320149136 CN201320149136U CN203178465U CN 203178465 U CN203178465 U CN 203178465U CN 201320149136 CN201320149136 CN 201320149136 CN 201320149136 U CN201320149136 U CN 201320149136U CN 203178465 U CN203178465 U CN 203178465U
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- mutual inductor
- delivery outlet
- signal delivery
- output
- merge cells
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Abstract
The utility model relates to an electronic transformer output calibration device. The device comprises a reference transformer, a converter, a merging unit, a data acquisition card and a calibration instrument. The reference transformer is connected with the data acquisition card. An input terminal of the converter is connected with a transformer to be verified and an output terminal is connected with the data acquisition card and the merging unit respectively. The merging unit and the data acquisition card are connected with the calibration instrument respectively. Compared to the prior art, by using the device of the utility model, there are the following advantages that calibration precision is high; operation is convenient and so on.
Description
Technical field
The utility model relates to a kind of transducer check technology, especially relates to a kind of electric mutual inductor output verification device.
Background technology
According to the IEC standard to describe, electronic mutual inductor is to have analog quantity voltage or digital quantity output.For the electric testing instrument of frequency 15～100Hz and the current-voltage transformer of protective relaying device use.As seen its function, range of application and conventional mutual inductor are in full accord; difference is the electronic mutual inductor output quantity; be can be for direct light current analog voltage signal or the digital quantity that uses of secondary device; be 22.5 as electronic current mutual inductor analog quantity outputting standard value; 150; 200,225mV (measurement is used) and 4V (protect and use), digital quantity outputting standard value is 2D41H (measure and use) and 01CFH (protect and use).And the conventional current mutual inductor is output as current signal, is generally 5A or 1A, can directly drive protective relaying device.As seen, the electronic mutual inductor way of output and traditional electromagnetic transformer way of output have very big difference, and traditional method of calibration can't satisfy the requirement of checking electronic type transformers.
The utility model content
The purpose of this utility model is exactly that a kind of checking precision height, easy to operate electric mutual inductor output verification device are provided in order to overcome the defective that above-mentioned prior art exists.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of electric mutual inductor output verification device, it is characterized in that, comprise benchmark mutual inductor, converter, merge cells, data collecting card and tester, described benchmark mutual inductor and data acquisition card connection, the input end of described converter is connected with mutual inductor to be verified, output terminal is connected with merge cells with data collecting card respectively, and described merge cells, data collecting card are connected with tester respectively.
Described converter comprises AD conversion unit, simulating signal delivery outlet and digital signal delivery outlet, described mutual inductor to be verified is connected with AD conversion unit, simulating signal delivery outlet respectively, described AD conversion unit is connected with the digital signal delivery outlet, described simulating signal delivery outlet and data acquisition card connection.
Also comprise synchronous clock, this synchronous clock is located between data collecting card and the merge cells.
Described data acquisition is arranged with two input channels and an output channel, and described two input channels are connected with the simulating signal delivery outlet with the output terminal of benchmark mutual inductor respectively, and described output channel is connected with PCI or the PXI interface of tester.
Described merge cells is connected with the Ethernet transmission interface of tester.
Compared with prior art, the utlity model has following advantage:
1, binary channels synchronized sampling can guarantee the phase error measurement accuracy like this, and absolute precision reaches more than 0.05%.
2, can satisfy 0.2 grade of electronic mutual inductor requirement of field-checking.
3, because analog-and digital-verification all is direct method, poor, so standard channel and exported by the verification electronic mutual inductor and not need to mate makes things convenient for manufacturer's standard mutual inductor and support equipment.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is elaborated.
Embodiment
As shown in Figure 1, a kind of electric mutual inductor output verification device, comprise benchmark mutual inductor 1, converter, merge cells 5, data collecting card 6, synchronous clock 7 and tester 8, described benchmark mutual inductor 1 is connected with data collecting card 6, the input end of described converter is connected with mutual inductor 2 to be verified, output terminal is connected with merge cells 5 with data collecting card 6 respectively, and described merge cells 5, data collecting card 6 are connected with tester 8 respectively.Described synchronous clock 7 is located between data collecting card 6 and the merge cells 8.
Described converter comprises AD conversion unit 3, simulating signal delivery outlet 4 and digital signal delivery outlet, described mutual inductor to be verified 2 is connected with AD conversion unit 3, simulating signal delivery outlet 4 respectively, described AD conversion unit 3 is connected with the digital signal delivery outlet, and described simulating signal delivery outlet 4 is connected with data collecting card 6.
Described data collecting card 6 is provided with two input channels and an output channel, and described two input channels are connected with simulating signal delivery outlet 4 with the output terminal of benchmark mutual inductor 1 respectively, and described output channel is connected with PCI or the PXI interface of tester 8.Described merge cells 5 is connected with the Ethernet transmission interface of tester 8.
The utility model will simulate verification (adopting the Direct Digital check addition) and digit check (adopting the A/D mode) combines, and requiring of each parts is as follows:
1, benchmark mutual inductor design, not poor because analog-and digital-verification all is direct method, so standard channel and the output of tested electronic mutual inductor do not need coupling, make things convenient for manufacturer's standard mutual inductor and support equipment.
2, the high-precise synchronization data collecting card is selected.The A/D conversion is the key component of whole check system.And synchronized sampling is very big to the angular difference influence of mutual inductor.So select the suitable data capture card very crucial.
3, synchronous clock design.Synchronous clock and data collecting card interface etc.
4, tester data processing software exploitation.What use is virtual instrument technique, and a lot of functions are all finished by software, so the exploitation of output process software is also very important, can strengthen the intelligent and interactivity of total system.
Claims (5)
1. electric mutual inductor output verification device, it is characterized in that, comprise benchmark mutual inductor, converter, merge cells, data collecting card and tester, described benchmark mutual inductor and data acquisition card connection, the input end of described converter is connected with mutual inductor to be verified, output terminal is connected with merge cells with data collecting card respectively, and described merge cells, data collecting card are connected with tester respectively.
2. a kind of electric mutual inductor output verification device according to claim 1, it is characterized in that, described converter comprises AD conversion unit, simulating signal delivery outlet and digital signal delivery outlet, described mutual inductor to be verified is connected with AD conversion unit, simulating signal delivery outlet respectively, described AD conversion unit is connected with the digital signal delivery outlet, described simulating signal delivery outlet and data acquisition card connection.
3. a kind of electric mutual inductor output verification device according to claim 1 is characterized in that also comprise synchronous clock, this synchronous clock is located between data collecting card and the merge cells.
4. a kind of electric mutual inductor output verification device according to claim 2, it is characterized in that, described data acquisition is arranged with two input channels and an output channel, described two input channels are connected with the simulating signal delivery outlet with the output terminal of benchmark mutual inductor respectively, and described output channel is connected with PCI or the PXI interface of tester.
5. a kind of electric mutual inductor output verification device according to claim 1 is characterized in that, described merge cells is connected with the Ethernet transmission interface of tester.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320149136 CN203178465U (en) | 2013-03-28 | 2013-03-28 | Electronic transformer output calibration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320149136 CN203178465U (en) | 2013-03-28 | 2013-03-28 | Electronic transformer output calibration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203178465U true CN203178465U (en) | 2013-09-04 |
Family
ID=49075143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320149136 Expired - Lifetime CN203178465U (en) | 2013-03-28 | 2013-03-28 | Electronic transformer output calibration device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203178465U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103235279A (en) * | 2013-03-28 | 2013-08-07 | 国家电网公司 | Electronic transformer output checking device |
| CN104569897A (en) * | 2014-12-11 | 2015-04-29 | 许继集团有限公司 | Standard Rogowski coil-based electronic current transformer calibration system |
-
2013
- 2013-03-28 CN CN 201320149136 patent/CN203178465U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103235279A (en) * | 2013-03-28 | 2013-08-07 | 国家电网公司 | Electronic transformer output checking device |
| CN103235279B (en) * | 2013-03-28 | 2016-03-23 | 国家电网公司 | A kind of electric mutual inductor output verification device |
| CN104569897A (en) * | 2014-12-11 | 2015-04-29 | 许继集团有限公司 | Standard Rogowski coil-based electronic current transformer calibration system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130904 |
|
| CX01 | Expiry of patent term |