The line voltage--the line to line voltage Vab y=Vm-Vlmn=√3an∠30°=√3∠30 30 b Jbn∠30°=√3∠-909 a=in-Vm=3∠30°=V3Vn∠-2l0° b 3y and ab leads v bc by 120 be leads v ca by120° ca leads vab by120° ab+ybctvca=0(balanced sourceThe line voltage--the line to line voltage. V bc • V ca • V ab • V bn • V cn • V an •   = − = 3 30 = 3 30 • • • • p Vab Van Vbn Van V   = − = 3 30 = 3 − 90 • • • • p Vbc Vbn Vcn Vbn V   = − = 3 30 = 3  − 210 • • • • p V ca V cn V an V cn V    120 120 3 120 V leadsV by V leadsV by V V and V leadsV by ca a b b c ca a b b c L p • • • • • •  = V a b +V b c +V ca = 0 ( balanced source ) • • •  30