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.
JIANG Q T, CAO L. Residual voltage of terms and test method［J］. Chinese journal of medical instrumentation. 2010, 34(3): 215-217.
HE M, TU R, WU S H. A discussion about the test method of residual voltage in medical device［J］. China Medicine and Engineering, 2012, 19(8): 1239-1240.
DAI D X, RUAN Y S, WANG Q. Calibration theory and measurement of the frequency characteristics of the four-pair terminal standard capacitor［J］. Acta Metrologica Sinica, 2005, 26(3): 263-266.
GUO G L, ZHAO J X. The real-time measuring method on dielectric loss angle of electrical capacitive equipment［J］. Acta Metrologica Sinica, 2009, 30(1): 84-87.
JIA D, L J H, CAI J H. Calculation of Test Cell Capacitance of Insulating Oils Dielectric Dissipation and Resistivity Tester［J］. Acta Metrologica Sinica, 2023, 44(2): 246-251.
HU X Q, YANG J, ZHANG L. A lumped-parameter circuit model of resistive divider and its analysis［J］. Journal of Chongqing Institute of Technology (Natural Science), 2008, 22(7): 96-98.
WANG Y, CHEN Z J, JIANG C, et al, Design of detection system for residual voltage based on FPGA［J］. Measurement Control Technology and Instruments, 2013, 39(3): 80-83.
FENG J, LAI L, SHI L B, et al. Precision measurement of AC resistance and time constant based on quasi-baance resistance bridge［J］. Transactions of China Electrotechnical Society,2017, 32(19): 187-192.
CHEN W F, JIANG Q X. Performance of resistance divider and measurement of high-voltage nanosecond double exponential pulse［J］. Journal of Southeast University (Natural Science Edition), 2006, 36(3): 374-379.
2024, Vol. 45 
