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Protection and Control
High-speed DPFC distance protection (21D)
Six zone phase-to-phase distance protection (21L)
Six zone phase-to-ground distance protection (21L)
DPFC current differential protection (87L)
Steady-state current differential protection (87L)
Neutral current differential protection (87L)
Pilot distance protection (85)
Pilot directional earth-fault protection (85)
Unique power swing blocking releasing logic (PSBR)
Six stages phase overcurrent protection (67P, 50/51P)
Six stages earth-fault protection (67G, 50/51G)
Two stages negative-sequence overcurrent protection (67Q, 50/51Q)
Switch-onto-fault (SOTF) logic
Two stages phase undervoltage protection (27P)
Two stages phase overvoltage protection (59P)
Two stages negative-sequence overvoltage protection (59Q)
Two stages residual overvoltage protection (59G)
Four stages overfrequency protection (81O)
Four stages underfrequency protection (81U)
Four stages frequency rate-of-change protection (81R)
Two stages reverse power protection (32R)
Two stages thermal overload protection (49P)
One stage undercurrent protection (37)
Breaker failure protection (50BF)
Flashover protection (50F)
Dead zone protection (50DZ)
Broken conductor protection (46BC)
Pole discrepancy protection (62PD)
Stub differential protection (87STB)
Out-of-step protection (78)
Auto-reclosing (79)
Switchgear control
Synchronism Check (25)
Voltage selection
Voltage and current drift auto adjustment
Single-ended impedance-based fault location
Travelling-Wave fault location including single-ended travelling-wave-based method and double-ended travelling-wave-based method
