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Protection and Control
Current differential protection (87L)
Six-stage phase overcurrent protection (50P/51P/67P)
Six-stage zero sequence overcurrent protection (50G/51G/67G)
Negative sequence overcurrent protection (46)
Broken conductor protection (46BC)
The ratio of negative-sequence current to positive-sequence current (Ι2/Ι1) is used to detect the broken conductor.
Breaker failure Protection (50BF)
Thermal overload protection (49)
Undervoltage/Overvoltage protection (27/59)
Switch-onto-fault (SOTF) logic.
Synchronism check (25)
Auto-reclosing (three-pole) (79)
Mechanical protection(MR)
Remote control and measurement.
Voltage and current drift auto adjustment.
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