Similar multiphase meters apply the fundamental frequency filtering means to each load current and optionally to {HEAD ~ each supply voltage} to extend {TAIL ~ the method} used in single phase meters 
to extend
Similar multiphase meters apply the fundamental frequency filtering means to each load current and optionally to { HEAD ~ each supply voltage } to extend { TAIL ~ the method } used in single phase meters
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH