for measuring simultaneously at least two of the following three variables: real component, reactive component, apparent energy

Full Title

Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption (monitoring electric consumption of electrically-propelled vehicles B60L3/00) > Meters specially adapted for measuring real or reactive components; Meters specially adapted for measuring apparent energy > for measuring simultaneously at least two of the following three variables: real component, reactive component, apparent energy