A symmetrical 3-phase fault on a power transmission system is characterized by:
AEqual fault currents in all three phases spaced 120 degrees apart
BUnbalanced phase voltages
CHigh zero-sequence current flow
DDominant negative-sequence components
Explanation
Three-phase-to-ground (3L-G) faults are symmetrical; system currents remain balanced in magnitude and 120 degrees phase shift, with no zero-sequence components.
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