A three-phase calibration and field measurement setup based on a custom digitizer

This paper describes a new three-phase power measurement setup to be used as a national power standard in Finland. A custom 6-channel digitizer was previously developed for the purpose together with measurement software, which can be extended at will to accommodate new analyses. The setup can easily be moved outside the lab for field measurements. Voltage attenuators are custom-made at VTT and different types of current sensors can be selected for use depending on current levels and location. Uncertainty budget is currently being made for the setup.