Loss-of-Mains (LOM) Protection Tests RoCoF for Type A and Type B Power Generating – Facilities The Generator shall demonstrate compliance with this EREC G99 in respect of LOM Protection by Manufacturers Information either providing the DNO with appropriate or by undertaking the following tests on site Calibration and Accuracy Tests Relay Operating Time Ramp in range 49.0-51.0Hz Pickup (+ / -0.025Hzs-1) RoCoF= +0.05 above setting / 0.10Hzs-1 Lower Measured Upper Test Lower Measured Upper Result Setting = 0.5 / 1.0 Hzs-1 Result Limit Value Limit Condition Limit Value Limit 0.475 0.525 0.55 Hzs-1 Increasing Frequency Pass/Fail Pass/Fail >0.5s <1.0s 0.975 1.025 1.10 Hzs-1 0.475 0.525 0.55 Hzs-1 Reducing Frequency Pass/Fail Pass/Fail >0.5s <1.0s 0.975 1.025 1.1 Hzs-1 Stability Tests Test Test Condition Test frequency ramp Ramp in range 49.0-51.0Hz Confirm No Trip Result Duration < RoCoF 4.4s Pass/Fail Inside Normal band ( increasing f ) 0.45Hzs-1 0.95 Hzs-1 < RoCoF 2.1s Pass/Fail Inside Normal band ( reducing f ) Additional Comments / Observations: LoM Protection - Stability test Start Change End Frequency Confirm no trip Frequency 49.5Hz +50 degrees 50.5Hz - 50 degrees Insert here any additional tests which have been carried out
Loss-of-Mains (LOM) Protection Tests – RoCoF for Type A and Type B Power Generating Facilities The Generator shall demonstrate compliance with this EREC G99 in respect of LOM Protection by either providing the DNO with appropriate Manufacturers Information or by undertaking the following tests on site Calibration and Accuracy Tests Ramp in range 49.0-51.0Hz Pickup (+ / -0.025Hzs-1) Relay Operating Time RoCoF= +0.05 / 0.10Hzs-1 above setting Setting = 0.5 / 1.0 Hzs-1 Lower Limit Measured Value Upper Limit Result Test Condition Lower Limit Measured Value Upper Limit Result Increasing Frequency 0.475 0.975 0.525 1.025 Pass/Fail 0.55 Hzs-1 1.10 Hzs-1 >0.5s <1.0s Pass/Fail Reducing Frequency 0.475 0.975 0.525 1.025 Pass/Fail 0.55 Hzs-1 1.1 Hzs-1 >0.5s <1.0s Pass/Fail Stability Tests Ramp in range 49.0-51.0Hz Test Condition Test frequency ramp Test Duration Confirm No Trip Result Inside Normal band < RoCoF ( increasing f ) 0.45Hzs-1 0.95 Hzs-1 4.4s Pass/Fail Inside Normal band < RoCoF ( reducing f ) 2.1s Pass/Fail Additional Comments / Observations: LoM Protection - Stability test Start Frequency Change End Frequency Confirm no trip 49.5Hz +50 degrees 50.5Hz - 50 degrees Insert here any additional tests which have been carried out