Detection of cross-country faults

A system configured to detect a cross-country fault in an electric power system, comprising:

• a data acquisition subsystem configured to receive a plurality of representations of electrical conditions associated with at least a portion of the electric power system;
• a magnitude and angle subsystem configured to:
• identify a first condition comprising a voltage magnitude of one phase exceeding a first voltage threshold based on the plurality of representations of electrical conditions;
• identify the one phase that exceeds the first voltage threshold as an un-faulted phase;
• identify a second condition comprising the voltage magnitude of the un-faulted phase exceeding a second threshold based on a zero-sequence voltage based on the plurality of representations of electrical conditions;
• identify a third condition comprising a phase angle between the un-faulted phase and the zero-sequence voltage being within a range based on the plurality of representations of electrical conditions;
• a fault determination module configured to:
• identify a cross-country fault condition based on identification of the first condition, the second condition, and the third condition by the magnitude and angle subsystem;
• annunciate the cross-country fault condition;
• a protective action module configured to implement a protective action to clear the cross-country fault condition.