- voltages, currents, power and energy;
- harmonics and harmonic analysis;
- vector analysis;
- registration and analysis of transients;
- direction of source of interference and nonlinearity.
The control is in accordance with the European standards for electricity quality - BDS EN 50160 and Documents approved by SEWRC: "Methodology for reporting ... targets for quality of electricity ..." from 29.05.2007 and "Indicators on the quality of electricity supply ”of 30.06.2004.