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Intelligent current and voltage transformer verifying unit

A technology of transformer calibration and voltage transformer, which is applied in the direction of measuring devices, instruments, and measuring electrical variables, etc., can solve single problems, and achieve the effect of convenient operation and high integration

Inactive Publication Date: 2015-12-09
NANJING JIARUISI ELECTRIC POWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the above technical problems, the present invention provides an intelligent current voltage transformer calibration device, which integrates standard current transformers and standard voltage transformers, which can not only realize the testing of conventional electromagnetic current / voltage transformers, but also realize The test of the electronic current / voltage transformer with analog output overcomes the shortcoming of the single function of the conventional calibrator; the structure is simple and reasonable, the test function is powerful, and the integration is high

Method used

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  • Intelligent current and voltage transformer verifying unit

Examples

Experimental program
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Effect test

Embodiment 1

[0051] Such as Figure 7 As shown, for example, the transformation ratio of the measured CT, that is, the measured current transformer is 1A:0.1765V, then the standard current transformer selects the "1A" file, and the standard CT, that is, the standard current transformer, is set as follows: rated primary current "1A", Rated secondary voltage "4V" (default is 4V); Tested CT settings: rated primary current "1A", rated secondary voltage "0.1765V"; Figure 7 The rated primary current selection gear of the standard CT should be in accordance with Figure 4 The standard CT selection gear in the same.

[0052] For example, if the transformation ratio of the measured CT is 5A:3.53V, then the standard current transformer selects the "5A" file, Figure 7 Standard CT settings in: rated primary current "5A", rated secondary voltage "4V" (default is 4V); tested CT settings: rated primary current "5A", rated secondary voltage "3.53V".

Embodiment 2

[0054] Such as Figure 8 As shown, for example, the transformation ratio of the tested PT, that is, the tested voltage transformer is 100V:5V, then the standard voltage transformer selects the "100V" file, Figure 8 Standard PT settings in: rated primary voltage "100V", rated secondary voltage "4V" (default is 4V); tested PT settings: rated primary voltage "100", rated secondary voltage "5V". Figure 8 The rated primary current selection gear of the standard PT needs to match with Figure 4 The standard PT selection gear in the same.

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Abstract

The invention discloses an intelligent current and voltage transformer verifying unit, comprising a current / voltage source, a check meter, a host computer CPU, and a display control interface. The current / voltage source is used for simultaneously providing a current / voltage source for a standard transformer and a detected transformer; the check meter is internally provided with a standard transformer and a verification module; the standard transformer comprises a standard current transformer and a standard voltage transformer, and simultaneously sends output signals of the standard transformer and the detected transformer to the verification module; the host computer CPU compares uploaded signals of the standard transformer and the detected transformer, obtains a ratio error and an angle error, and presets comparison parameters and displays comparison result information through the display control interface. The intelligent current and voltage transformer verifying unit integrates the standard current transformer and the standard voltage transformer, can test a routine electromagnetic current / voltage transformer as well as an analog output electronic current / voltage transformer, and overcome the disadvantage of single function of a routine check meter, and has the characteristic of simple and reasonable structure, powerful test function, and high integrated level.

Description

technical field [0001] The invention belongs to the field of calibration of power system metering equipment, and specifically refers to an intelligent current voltage transformer calibration device. Background technique [0002] The transformer calibrator is mainly used to verify the technical performance of the voltage transformer and current transformer used in the field or in the laboratory. my country's transformer calibrator can be roughly divided into three generations: the first generation of electrical calibrator, the operation is cumbersome, the wiring is complicated; the second generation calibrator adopts more advanced electronic circuits, which is more convenient to use than the previous generation calibrator, However, it is necessary to switch the range gear frequently during the measurement process, and there is little information displayed during the test process; most of the third-generation calibrator uses a single-chip microcomputer, which improves the intel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/02
Inventor 何斌涂善军杨宏江沈国庆吴月飞杨启超
Owner NANJING JIARUISI ELECTRIC POWER TECH
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