8.8.5 SettingsTable 137:AEGGAPC (50AE) Group settings (basic)Name Values (Range) Unit Step Default DescriptionOperation DisabledEnabled- - Disabled Disable/Enable OperationI> 5 - 900 %IB 1 120 Phase current pickup in % of IBasetOC 0.000 - 60.000 s 0.001 0.030 Trip time daly for overcurrent levelArmU< 2 - 150 %VB 1 50 Undervoltage level to arm protection in % ofVbasetArm 0.000 - 60.000 s 0.001 5.000 Time delay to arm protection with undervoltagepickupDisarmU> 2 - 200 %VB 1 80 Over voltage level to disarm protection in % ofVbasetDisarm 0.000 - 60.000 s 0.001 0.500 Time delay to disarm protection when voltagegreater than drop out levelTable 138:AEGGAPC (50AE) Non group settings (basic)Name Values (Range) Unit Step Default DescriptionGlobalBaseSel 1 - 6 - 1 1 Selection of one of the Global Base ValueGroups8.8.6 Monitored dataTable 139:AEGGAPC (50AE) Monitored dataName Type Values (Range) Unit DescriptionIMAX REAL - A Maximum value of currentUMAX REAL - kV Maximum value of phase tophase voltage8.8.7 Operation principleAccidental energizing protection for synchronous generator AEGGAPC (50AE) functionis connected to three phase current input either from the generator terminal side or fromgenerator neutral point side and three phase voltage from the generator terminals. Themaximum of the three phase-to-phase voltages and maximum of the three phase currentsare measured.When the maximum phase-to-phase voltage is less than the 27_pick_up for the periodtArm, it is ensured that the generator is off-line. The Enabled signal will initiate the armingand enable the overcurrent function. If the calculated maximum current of the three phases1MRK 502 048-UUS A Section 8Current protection263Technical manual
