1. In a three-phase system, the voltages are separated by A. 45° B. 90° C. 120°

Question

1.

In a three-phase system, the voltages are separated by
A. 45° B. 90°
C. 120° D. 180°
2.

In a three-phase system, when the loads are perfectly balanced, the neutral current is
A. zero
B. one-third of maximum
C. two-thirds of maximum
D. at maximum3.

In a -connected source driving a -connected load, the
A. load voltage and line voltage are one-third the source voltage for a given phase
B. load voltage and line voltage are two-thirds the source voltage for a given phase
C. load voltage and line voltage cancel for a given phase
D. load voltage, line voltage, and source phase voltage are all equal for a given phase4.

In a certain three-wire Y-connected generator, the phase voltages are 2 kV. The magnitudes of the line voltages are
A. 2,000 V
B. 6,000 V
C. 666 V
D. 3,464 V

Explanation / Answer

C,A,D,D

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