For each set of voltages, state whether or not the voltages form a balanced three-phase
Chapter 11, Problem 11.2(choose chapter or problem)
For each set of voltages, state whether or not the voltages form a balanced three-phase set. If the set is balanced, state whether the phase sequence is positive or negative. If the set is not balanced, explain why. a) b) c) d) vc = 1121 cos (2000t + 100) V. vb = 1121 sin (2000t - 50) V, va = 1121 cos (2000t - 20 ) V, vc = 426 cos(100t - 120) V. vb = 462 cos(100t + 120) V, va = 426 cos 100t V, vc = 188 cos (250t - 60 ) V. vb = -188 cos 250t V, va = 188 cos(250t + 60) V, vc = 48 cos (314t + 75 ) V. vb = 48 cos (314t - 165 ) V, va = 48 cos(314t - 45) V, vc
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