PSPTUV complements other loss-of-grid protection principles based on thefrequency and voltage operation.Motor stalling and failure to start can lead to a continuous undervoltage. The positive-sequence undervoltage is used as a backup protection against the motor stallcondition.4.5.5.6 SignalsTable 415:PSPTUV Input signalsName Type Default DescriptionU1 SIGNAL 0 Positive phase sequence voltageBLOCK BOOLEAN 0=False Block signal for activating the blocking modeTable 416:PSPTUV Output signalsName Type DescriptionOPERATE BOOLEAN OperateSTART BOOLEAN Start4.5.5.7 SettingsTable 417:PSPTUV Group settingsParameter Values (Range) Unit Step Default DescriptionStart value 0.010...1.200 xUn 0.001 0.500 Start valueOperate delay time 40...120000 ms 10 40 Operate delay timeVoltage block value 0.01...1.00 xUn 0.01 0.20 Internal blocking levelEnable block value 0=False1=True1=True Enable Internal BlockingTable 418:PSPTUV Non group settingsParameter Values (Range) Unit Step Default DescriptionOperation 1=on5=off1=on Operation Off / OnReset delay time 0...60000 ms 1 20 Reset delay timeRelative hysteresis 1.0...5.0 % 0.1 4.0 Relative hysteresis for operationSection 4 1YHT530004D05 DProtection functions492 615 seriesTechnical Manual
