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