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This paper proposes a DC high-voltage resistive divider circuit model, analyzes the reason that leakage current arises when applying high voltage, develops the measurement device for measuring leakage current of a divider, and puts forward a method of evaluating the divider voltage variation by measuring leakage current. The measurement uncertainty is better than 4 × 10−6.
This paper focus on the research of a parallel-plate air capacitor, which used as the low voltage arms in capacitive voltage ratio standards for power frequency. The electrodes of this newly-developed capacitor are made of Invar Alloy and placed in parallel. It can achieve large capacitance, low voltage dependence (VC) and low dissipation. These 5 nF standard capacitors were calibrated by using the...
This paper describes the calculation of the magnetic shielding effectiveness in current comparators, considering the air gap which is inevitable for the magnetic shielding. The method was verified to be accurate and effective by finite-element method analysis. Experiments were implemented to investigate the effect of the air gap as well.
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