Comprehensive and Secure Distance Protection
Four zones of phase and ground mho elements plus four zones ground distance quadrilateral elements, each reversible, with independent phase and ground timers for complete distance protection. Positive-sequence memory voltage polarization with long memory time constant for three-phase fault directional security. Negative-sequence impedance directional element polarization for sensitive and secure operation during unbalanced faults.

Extensive Supplemental Protection Elements and Logic
Four residual and negative-sequence overcurrent elements with negative-sequence directional control. Phase, sequence, and ground time-overcurrent elements for backup protection. Out-of-step elements for power swing blocking and tripping. Phase and sequence under-and over-voltage elements. Load encroachment logic to protect against false operations during heavy load conditions. Single-pole tripping logic. Built-in communications-assisted tripping scheme logic. SELogic control equations for custom scheme logic.

Multiple Settings Groups
Six settings groups, for maximum protection scheme flexibility, allow application with bus-tie breakers or for remote system reconfiguration.

Fault Locating
Use the built-in fault locator to efficiently dispatch line inspection and repair personnel.

Communications
Patented Mirrored Bits communications and communications-assisted tripping schemes.