Turbine Protection Settings Provided by WFPS Turbine Protection Recommended By Setting EirGrid T1 T2 Tn-1 Tn Underfrequency stage 1 f< 47.5 Hz Setpoint Underfrequency stage 1 t< 3600 s time delay Underfrequency stage 2 f<< 47.4 Hz Setpoint Underfrequency stage 2 t<< 20 s time delay Underfrequency stage 3 f<<< 46.9 Hz Setpoint Underfrequency stage 3 t<<< 1 s time delay Overfrequency stage 1 f> 52Hz Setpoint Overfrequency stage 1 t> 3600 s time delay Overfrequency stage 2 f>> 52.1 Hz Setpoint Overfrequency stage 2 t>> 1 s time delay Rate of Change of df/dt Max Frequency setpoint Rate of Change of t Max Frequency delay Undervoltage stage 1 U< 0.89 pu Setpoint Undervoltage stage 1 time t< 3 s delay Undervoltage stage 2 U<< 0.14 pu Setpoint Undervoltage stage 2 time t<< 0.625 s delay Overvoltage stage 1 U> 1.11 pu Setpoint Overvoltage stage 1 time t> 60 s delay Overvoltage stage 2 U>> 1.2 pu Setpoint Overvoltage stage 2 time t>> 15 s delay Fault Ride Through N N/A Lockout Events Fault Ride Through Lockout Time Period t N/A (Specify if rolling time period)
Turbine Protection Settings Turbine Protection Setting Recommended By EirGrid Provided by WFPS T1 T2 Tn-1 Tn Underfrequency stage 1 Setpoint f< 47.5 Hz Underfrequency stage 1 time delay t< 3600 s Underfrequency stage 2 Setpoint f<< 47.4 Hz Underfrequency stage 2 time delay t<< 20 s Underfrequency stage 3 Setpoint f<<< 46.9 Hz Underfrequency stage 3 time delay t<<< 1 s Overfrequency stage 1 Setpoint f> 52Hz Overfrequency stage 1 time delay t> 3600 s Overfrequency stage 2 Setpoint f>> 52.1 Hz Overfrequency stage 2 time delay t>> 1 s Rate of Change of Frequency setpoint df/dt Max Rate of Change of Frequency delay t Max Undervoltage stage 1 Setpoint U< 0.89 pu Undervoltage stage 1 time delay t< 3 s Undervoltage stage 2 Setpoint U<< 0.14 pu Undervoltage stage 2 time delay t<< 0.625 s Overvoltage stage 1 Setpoint U> 1.11 pu Overvoltage stage 1 time delay t> 60 s Overvoltage stage 2 Setpoint U>> 1.2 pu Overvoltage stage 2 time delay t>> 15 s Fault Ride Through Lockout Events N N/A Fault Ride Through Lockout Time Period (Specify if rolling time period) t N/A