1.

Suppose IA, IB and IC are a set of unbalanced current phasors in a three-phase system. The phase-B zero-sequence current IB0 = 0.1 ∠0° p.u. If phase-A current IA = 1.1 ∠0° p.u. and phase-C current IC = (1 ∠120° + 0.1) p.u. then IB in p.u. is

A. 1 ∠240° - 0.1 ∠0°
B. 1.1 ∠240° - 0.1 ∠0°
C. 1.1 ∠-120° + 0.1 ∠0°
D. 1 ∠-120° + 0.1 ∠0°
Answer» E.


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