Main Faults in Alternator and Protective Devices:
Stator Phase Fault (87G)
Field Ground Fault (64F)
Stator Ground Fault (87N, 51N, 59N, 27-3N)
Loss of Field (40Q, 40Z)
Over/Under Frequency (81O/81U)
Overexcitation and Overvoltage (24, 59)
Out of Step (78)
Negative Sequence (Current Unbalance) (46)
Inadvertent Energization (27, 50, 60, 81, 62, 86)
Loss of Voltage Transformer (60)
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