보호계전기용 CT의 여자특성 자동측정 시스템 개발

Development of an Automatic Excitation Characteristics Measurement System of the Protective Relaying CT

  • 발행 : 2008.07.16

초록

An automatic excitation characteristics measurement system for the protective relaying current transformer(CT) with accuracy of about 1 % has been developed. The system can be used up to 2 kV and 10 A at power frequency. The developed system can calculate the voltage and current at knee points of $30^{\circ}$ and $45^{\circ}$ tangents in accordance with IEEE standard by the interpolation in log scale. The excitation curve of the CT is plotted in auto-scale simultaneously with measuring rms voltage and current at the secondary of the CT.

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