Enhancement of AC high voltage measurements’ uncertainty using a high voltage divider calibration method

Abstract

This paper discusses enhancing of the measurements’ uncertainty for AC high voltage up to 100 kV. This is achieved by using a high voltage divider calibration method. Voltage measurements have been carried out at the Egyptian national institute for standards (NIS), using a high voltage measuring system (Phenix-KVM100), that consists of a high voltage divider and a voltage display. The voltage divider and display have been calibrated in low and high voltage ranges. Reference standard digital voltmeter and a multifunction calibrator have been used to calibrate the KVM100 for achieving accurate and traceable results. All calibrations have been performed automatically using Laboratory Virtual Instrument Engineering Workbench (LabVIEW) programs specially designed for this task. Uncertainty budget has been evaluated to get the measurements’ expanded uncertainties.

Keywords

• AC high voltage
• voltage divider calibration method
• automation
• enhanced uncertainty