recover above the set value. To ensure a proper reset, the function is blocked two seconds afterthe trip signal is issued.Trip outputOROR tANSI12000183-1-en.vsdVRPVOC (51V)I3P*I3P*V3P*V3P*BLOCKBLOCKBLKOCBLKOCBLKUVBLKUVTRIPTRIPTROCTROC27 Trip27 TripPICKUPPICKUPPU_OCPU_OC27 PU27 PUANSI12000183 V1 EN-USFigure 91: Undervoltage seal-in of current pickup7.17.3 Setting guidelines GUID-2AE85EC4-669E-47C0-ADD4-3DBA83581096 v3GlobalBaseSel: Selects the global base value group used by the function to define (IBase), (VBase)and (SBase).7.17.3.1 Explanation of the setting parameters GUID-9B777E6D-602B-4214-9170-A44ED2D725BF v3Operation: Set toOn in order to activate the function; set toOff to switch off the completefunction.Pickup_Curr: Operation phase current level given in % ofIBase.Characterist: Selection of time characteristic: Definite time delay and different types of inversetime characteristics are available; see Technical Manual for details.tDef_OC: Definite time delay. It is used if definite time characteristic is chosen; it shall be set to0 sif the inverse time characteristic is chosen and no additional delay shall be added. Note that thevalue set is the time between activation of the start and the trip outputs.k: Time multiplier for inverse time delay.tMin: Minimum operation time for all inverse time characteristics. At high currents the inverse timecharacteristic might give a very short operation time. By setting this parameter the operation timeof the step can never be shorter than the setting.Operation_UV: it setsOn/Off the operation of the under-voltage stage.PickUp_Volt: Operation phase-to-phase voltage level given in % ofVBase for the under-voltagestage. Typical setting may be, for example, in the range from 70% to 80% of the rated voltage ofthe generator.Section 7 1MRK 511 358-UUS ACurrent protection198Application manual
