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Protection
Six-stage phase overcurrent protection(50/51P)
Four-stage directional phase overcurrent protection (67P)
Six-stage neutral/ground overcurrent protection(50/51N, 50/51G)
Four-stage directional neutral/ground overcurrent protection(67N/G)
Two-stage negative-sequence overcurrent protection (46)
Thermal overload protection for alarm/trip (49)
Broken conduct detection (46BC)
Breaker failure element (50BF)
Dead zone protection (50DZ)
Undercurrent protection (37)
Restricted earth fault protection (64REF)
Two-stage phase-ground or phase-phase undervoltage protection (27)
Two-stage phase-ground or phase-phase overvoltage protection (59)
Two-stage ground overvoltage protection (59G)
One-stage negative sequence overvoltage protection (47)
Four-stage under-frequency protection (81U)
Over-frequency protection (81O)
Frequency rate-of-change protection (81R)
Directional power protection (32)
Four-shot three-pole auto-reclosing (79)
Synchronism check for manual closing and auto- reclosing (25)
Switch onto fault logic (SOTF)
Cold load pickup logic (CLP)
Mechanical protection (MR)
Fault location (FL)
Voltage and current drift auto adjustment
