Overfrequency and underfrequency protection, frequency change protection and monitoring of dwell time in frequency bands as turbine protection (protection against abnormal frequencies).Universal overvoltage and undervoltage protection with different measuring methods.Shaft-current protection (in particular with hydropower applications).Rotor and stator overload protection with cold gas consideration (coolant temperature).Overload protection and temperature supervision via external RTD unit (with PT 100, for example).Underexcitation and overexcitation protection.High-precision reverse-power protection and universal power protection.
Rotor ground-fault protection with different measuring methods (ground current or ground-resistance monitoring).Stator ground-fault protection (90% non-directional or directional, 100% with 3rd harmonic, real 100% protection with 20-Hz voltage interference).Short-circuit protection (overcurrent protection, impedance protection, differential protection).DIGSI 5 permits all functions to be configured and combined as required.
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