EEE :: Three - Phase Systems in Power Applications
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A three-phase generator is connected to three 90
load resistors. Each coil generates 120 V ac. A common neutral line exists. How much current flows through the common neutral line? -
Compare the total copper cross sections in terms of current-carrying capacity for a single-phase and a three-phase 120 V system with effective load resistance of 15
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If in a Y-connected ac generator, each phase voltage has a magnitude of 90 VRMS, what is the magnitude of each line voltage?
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Polyphase generators produce simultaneous multiple sinusoidal voltages that are separated by
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In a balanced three-phase load, each phase has
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In a certain Y-Y system, the source phase currents each have a magnitude of 9 A. The magnitude of each load current for a balanced load condition is
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A three-phase
-connected generator is driving a balanced load such that each phase current is 12 A in magnitude. When I θa = 12 
30° A, what are the polar expressions for the other phase currents? -
In a Y-connected circuit, between each line voltage and the nearest phase voltage, there is a phase angle of
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The most common type of ac motor is the
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In a Y-connected source feeding a
-connected load,
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