9.6.4 SignalsTable 298:STEFPHIZ Input signalsName Type Default DescriptionU3PNEUT GROUPSIGNAL- Voltage connection neutral sideU3PTERM GROUPSIGNAL- Open-Delta connection on Terminal sideCBCLOSED BOOLEAN 1 TRUE means breaker between gen. & trafo isclosedBLOCK BOOLEAN 0 Complete block of the stator earth fault protecionfunctionBLOCK3RD BOOLEAN 0 Block of the 3rd harmonic-based parts of theprotectionBLOCKUN BOOLEAN 0 Block of the fund. harmonic-based part of theprotectionTable 299:STEFPHIZ Output signalsName Type DescriptionTRIP BOOLEAN Main, common trip commandTRIP3H BOOLEAN Trip by one of two 3rd harmonic voltage-based prot.TRIPUN BOOLEAN Trip by fund. freq. neutral over-voltage protectionSTART BOOLEAN Main, common start signalSTART3H BOOLEAN Start by one of two 3rd harmonic voltage-basedprot.STARTUN BOOLEAN Start signal by fund. freq. neutral over-voltage prot.UT3 REAL Mag. of 3rd harm. voltage at generator terminalside, VoltsUN3 REAL Mag. of 3rd harm. voltage at generator neutral side,VoltsE3 REAL Total induced stator 3rd harmonic voltage, primaryVoltsANGLE REAL Angle between 3rd harmonic votage phasors,radiansDU3 REAL Diff. between 3rd harm. volt. at both sides of gen.,VoltsBU3 REAL Bias voltage, a part of voltN3rdHarmonic, primaryVoltsUN REAL Fund. frequency voltage at generator neutral,primary VoltsSection 9 1MRK502052-UEN BVoltage protection534Technical manual
