{HEAD ~ Voltage values} considered in {TAIL ~ the context} of the invention are absolute voltage values of voltage phasors representing a three phase system 
considered in
{ HEAD ~ Voltage values } considered in { TAIL ~ the context } of the invention are absolute voltage values of voltage phasors representing a three phase system
HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH