An 11 kV, three-phase, star-connected alternator has a synchronous impedance of 10∟80° Ω/phase and operates at unity power factor on infinite bus bars. It supplies a current of 300 A by using a general load diagram. Determine: the full-load current for normal excitation ( motor mode), the current and power factor for 100% excitation on 25% overload (generator mode),  the maximum power that the machine can develop in the generator mode for 50% excitation

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An 11 kV, three-phase, star-connected alternator has a synchronous impedance of
10∟80° Ω/phase and operates at unity power factor on infinite bus bars. It supplies a
current of 300 A by using a general load diagram. Determine: the full-load current for normal excitation ( motor mode), the current and power factor for 100% excitation on 25% overload (generator
mode),  the maximum power that the machine can develop in the generator mode for
50% excitation

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