1. Phase-to-phase faults in generator
2. Three-phase faults in generator
3.
Phase-to-phase faults in the LV winding of the generator transformer or inter-
connecting bus or cables
4. Three-phase faults in the LV winding of the generator transformer or inter-
connecting bus or cables
Faults in the system in the high voltage (HV) side of generator transformer are:
1. Phase-to-ground faults in the HV side of generator transformer and in the power
system
2. Phase-to-phase faults in the HV side of generator transformer and in the power
system
3. Phase-phase-ground faults in the HV side of generator transformer and in the
power system
4. Three-phase faults in the HV side of generator transformer and in the power
system
Section 8 1MRK 504 163-UUS A
Impedance protection
502 Transformer protection RET670 2.2 ANSI
Application manual
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