A symmetrical star connected system has VRN = 230∠0⁰. The phase sequence is RYB. Find VYB.(a) 398.37∠-30⁰(b) 398.37∠210⁰(c) 398.37∠90⁰(d) 398.37∠-90⁰I have been asked this question in an online interview.Origin of the question is Voltage, Current and Power in a Star Connected System topic in section Polyphase Circuits of Network Theory

A symmetrical star connected system has VRN = 230∠0⁰. The phase se

1.	A symmetrical star connected system has VRN = 230∠0⁰. The phase sequence is RYB. Find VYB.(a) 398.37∠-30⁰(b) 398.37∠210⁰(c) 398.37∠90⁰(d) 398.37∠-90⁰I have been asked this question in an online interview.Origin of the question is Voltage, Current and Power in a Star Connected System topic in section Polyphase Circuits of Network Theory
Answer» RIGHT OPTION is (d) 398.37∠-90⁰ To elaborate: 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∠(-120^o+30^o)V=398.37∠-90⁰V.

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