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An electronic transformer output calibration device

A technology of electronic transformer and calibration device, which is applied in the field of transformer calibration, can solve the problems that the calibration method cannot meet the requirements of electronic transformer calibration, achieve convenient standard transformers and supporting equipment, and ensure accurate measurement The effect of sexiness and convenience of manufacture

Active Publication Date: 2016-03-23
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the output mode of electronic transformer is very different from that of traditional electromagnetic transformer, and the traditional calibration method cannot meet the requirements of electronic transformer calibration.

Method used

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  • An electronic transformer output calibration device

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Embodiment

[0017] like figure 1 As shown, a kind of electronic transformer output verification device, comprises reference transformer 1, converter, merging unit 5, data acquisition card 6, synchronous clock 7 and calibrator 8, described reference transformer 1 and data acquisition Card 6 is connected, and the input end of described converter is connected with transformer 2 to be verified, and the output end is connected with data acquisition card 6 and merging unit 5 respectively, and described merging unit 5, data acquisition card 6 are respectively connected with verification Meter 8 connection. The synchronous clock 7 is set between the data acquisition card 6 and the merging unit 8 .

[0018] The converter includes an analog-to-digital conversion unit 3, an analog signal output port 4 and a digital signal output port, and the transformer to be verified 2 is connected to the analog-to-digital conversion unit 3 and the analog signal output port 4 respectively, and the described The ...

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Abstract

The invention relates to an electronic transformer output checking device which comprises a standard transformer, a converter, a merging unit, a data acquisition card and a checking instrument. The standard transformer is connected with the data acquisition card. An input end of the converter is connected with a transformer to be checked. An output end of the converter is respectively connected with the data acquisition card and the merging unit. The merging unit and the data acquisition card are connected with the checking instrument respectively. Compared with the prior art, the electronic transformer output checking device has the advantages of high checking precision, convenience in operation and the like.

Description

technical field [0001] The invention relates to a transformer calibration technology, in particular to an electronic transformer output calibration device. Background technique [0002] According to the description of the IEC standard, electronic transformers have analog voltage or digital output. Current and voltage transformers for electrical measuring instruments and relay protection devices with a frequency of 15-100 Hz. It can be seen that its function and application range are exactly the same as those of conventional transformers. The difference is that the output of electronic transformers is weak analog voltage signals or digital quantities that can be directly used by secondary equipment, such as the standard value of analog output of electronic current transformers. 22.5, 150, 200, 225mV (for measurement) and 4V (for protection), and the digital output standard values ​​are 2D41H (for measurement) and 01CFH (for protection). The conventional current transformer ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R35/02
Inventor 厉达曹祎杜卫华沈滢秦雄
Owner STATE GRID CORP OF CHINA