8.8.2 FunctionalityInadvertent or accidental energizing of off-line generators has occurred often enoughdue to operating errors, breaker head flashovers, control circuit malfunctions, or acombination of these causes. Inadvertently energized generator operates as inductionmotor drawing a large current from the system. The voltage supervised overcurrentprotection is used to protect the inadvertently energized generator.Accidental energizing protection for synchronous generator (AEGGAPC, 50AE) takesthe maximum phase current input from the generator terminal side or from generatorneutral side and maximum phase to phase voltage inputs from the terminal side.AEGGAPC (50AE) is enabled when the terminal voltage drops below the specifiedvoltage level for the preset time.8.8.3 Function blockANSI09000783-1-en.vsdAEGGAPC (50AE)I3P*V3P*BLOCKBLKTRTRIPRIARMEDANSI09000783 V1 ENFigure 107: AEGGAPC (50AE) Function block8.8.4 SignalsTable 118:AEGGAPC (50AE) Input signalsName Type Default DescriptionI3P GROUPSIGNAL- Three Phase Current inputV3P GROUPSIGNAL- Three Phase Voltage inputBLOCK BOOLEAN 0 Block of functionBLKTR BOOLEAN 0 Block of tripTable 119:AEGGAPC (50AE) Output signalsName Type DescriptionTRIP BOOLEAN Trip signal from inadvertant energization protectionRI BOOLEAN Pick up from inadvertant energizationEnabled BOOLEAN True when accidental energizing protection is armedSection 8 1MRK 502 043-UUS BCurrent protection234Technical Manual
