Comparison of three different traceability methods for the measurand “high alternating voltages” at the PTB

In this paper, three different approaches to precision measurement of high AC voltage are described and compared. These approaches also include the metrological traceability of this measurand. These are traceability via the measured capacitance, current and voltage. As these different approaches all aim to preserve and pass on the measurand “high AC voltage”, they are compared in their results and complexity after the respective traceability. The comparison shows agreement below the PTB's measurement uncertainty of ±50 μV/V. This result leads to a confirmation of all three methods and is a foundation for future work towards a reduction of the best possible measurement uncertainties as well as a simplification and automation of the traceability.