A two-pole Y-connected synchronous generator rated at 470 kVA, 480 V, 60 Hz, and 0.85 PF lagging. Itsarmature resistance RA is 0.016 Q and its synchronous reactance is 0.899 N. The core losses of thisgenerator at rated conditions are 7 kW, and the friction and windage losses are 8 kW.(a)What are the rated current la and internal generated voltage Ea of this generator?(b)What is the voltage regulation of this generator at the rated current and power factor?(c)If this generator is operating at the rated conditions and the load is suddenly removed, what willthe terminal voltage be?(d)If this machine is operating at rated conditions, what input torque must be applied to the shaftof this generator?What is the torque angle & of this generator at rated conditions?(e)

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A two-pole Y-connected synchronous generator rated at 470 kVA, 480 V, 60 Hz, and 0.85 PF lagging.

Introductory Circuit Analysis (13th Edition)

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Question

A two-pole Y-connected synchronous generator rated at 470 kVA, 480 V, 60 Hz, and 0.85 PF lagging. Its
armature resistance RA is 0.016 Q and its synchronous reactance is 0.899 N. The core losses of this
generator at rated conditions are 7 kW, and the friction and windage losses are 8 kW.
(a)
What are the rated current la and internal generated voltage Ea of this generator?
(b)
What is the voltage regulation of this generator at the rated current and power factor?
(c)
If this generator is operating at the rated conditions and the load is suddenly removed, what will
the terminal voltage be?
(d)
If this machine is operating at rated conditions, what input torque must be applied to the shaft
of this generator?
What is the torque angle & of this generator at rated conditions?
(e)

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