In a balanced Y – Y circuit, the Van = Vp∠0, Vbn = Vp∠-120, Vcn = Vp∠+120. The line voltages are
1
Vab = √3 Vp ∠0, Vbc = √3 Vp ∠-120, Vca = √3 Vph ∠+120
2
Vab = √3 Vp ∠30, Vbc = √3 Vp ∠-90, Vca = √3 Vp ∠-210
3
Vab = Vp ∠30, Vbc = Vp ∠-90, Vca = Vp ∠-210
4
Vab = Vp ∠30, Vbc = Vp ∠90, Vca = Vp ∠210