EEE :: Three - Phase Systems in Power Applications
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In a three-phase system, when the loads are perfectly balanced, the neutral current is
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In a
-connected source driving a -connected load, the -
In a certain three-wire Y-connected generator, the phase voltages are 2 kV. The magnitudes of the line voltages are
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In a
-connected source feeding a Y-connected load, -
In a Y-Y source/load configuration, the
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In a Y-connected circuit, the magnitude of each line current is
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A constant load power means a uniform conversion of
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A two-phase generator is connected to two 90
load resistors. Each coil generates 120 V ac. A common neutral line exists. How much current flows through the common neutral line? -
A single-phase sinusoidal voltage of 120 V is connected to a 90
load. Current in the circuit is
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A.
load voltage and line voltage are one-third the source voltage for a given phase
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B.
load voltage and line voltage are two-thirds the source voltage for a given phase
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C.
load voltage and line voltage cancel for a given phase
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D.
load voltage, line voltage, and source phase voltage are all equal for a given phase
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A.
phase current, the line current, and the load current are all equal in each phase
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B.
phase current, the line current, and the load current are 120° out of phase
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C.
phase current and the line current are in phase, and both are 120° out of phase with the load current
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D.
line current and the load current are in phase, and both are out of phase with the phase current
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