A symmetrical star connected system has VRN = 230∠0⁰. The phase sequence is RYB. Find VYB.

A symmetrical star connected system has VRN = 230∠0⁰. The phase sequence is RYB. Find VYB. Correct Answer 398.37∠-90⁰

Corresponding line voltages are equal to √3 times the phase voltages and are 30⁰ ahead of the respective phase voltages. VYN = 230∠-120⁰V. VYB = √3×230∠(-120o+30o)V=398.37∠-90⁰V.
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