Calibration Method of Residual Voltage Tester for Electrical Equipment

FENG Jian; HU Junjie; XU Feng; ZHOU Bihong

doi:10.3969/j.issn.1000-1158.2024.05.03

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Acta Metrologica Sinica ›› 2024, Vol. 45 ›› Issue (5) : 626-630. DOI: 10.3969/j.issn.1000-1158.2024.05.03

Calibration Method of Residual Voltage Tester for Electrical Equipment

FENG Jian,HU Junjie,XU Feng,ZHOU Bihong

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Abstract

The principle of the residual voltage tester for electric equipment is analyzed. A method for calibrating the residual voltage amplitude and delay time parameters of the tester based on the standard resistance-capacitance network method is proposed. The influences of the time constant of the standard resistor and the loss factor of the standard capacitor on the calibration results are analyzed based on the equivalent model of the impedance components. The calculation method of the reference value of residual voltage and delay time is derived for the calibration. The residual voltage tester is calibrated by using a circuit network composed of a 1MΩ AC standard resistor and a 1μF standard capacitor and the results show that the mentioned method meets the calibration for the tester. The uncertainty analysis of the measurement results is carried out. The expanded uncertainty for the residual voltage amplitude is 1.1% and 1.2% for the delay time. The main uncertainty component is the measurement uncertainty of the loss factor of the standard capacitor.

Key words

electrical metrology / residual voltage / delay time / resistance-capacitance network / loss factor / measurement uncertainty

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FENG Jian,HU Junjie,XU Feng,ZHOU Bihong. Calibration Method of Residual Voltage Tester for Electrical Equipment[J]. Acta Metrologica Sinica. 2024, 45(5): 626-630 https://doi.org/10.3969/j.issn.1000-1158.2024.05.03

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