Let bn bn=V∠-120 cn=V∠+120° C Vp-rms magnitude of any of the phase voltages. an=V,∠0 =V,∠120°,Vcm=Vn∠240°Let  = 0 • p Van V  = −120 • p Vbn V  = +120 • p Vcn V Vp --rms magnitude of any of the phase voltages.  •  •  • or V an =Vp 0 , V bn =Vp 120 , V cn =Vp 240    a b c n • V bn • + + + − − − V an • V cn •