Name Values (Range) Unit Step Default DescriptionCurrMult_OC2 1.0 - 10.0 - 0.1 2.0 Multiplier for current operate level for step2 (OC2)tDef_OC2 0.00 - 6000.00 s 0.01 0.50 Independent (definite) time delay for step2 (OC2)DirMode_OC2 Non-directionalForwardReverse- - Non-directional Directional mode of step 2 (non-directional, forward, reverse)DirPrinc_OC2 I&UIcosPhi&U- - I&U Measuring on I & U or IcosPhi & U for step2 (OC2)ActLowVolt2_VM Non-directionalBlock- - Block Low votlage level action for step 2 (Non-directional, Block, Memory)Table 108:DNSPTOC Non group settings (basic)Name Values (Range) Unit Step Default DescriptionGlobalBaseSel 1 - 6 - 1 1 Selection of one of the Global Base Valuegroups6.12.6 Monitored dataTable 109:DNSPTOC Monitored dataName Type Values (Range) Unit DescriptionCURRENT REAL - A Measured current valueVOLTAGE REAL - kV Measured voltage valueUIANGLE REAL - deg Angle between voltageand current6.12.7 Operation principleNegative sequence based overcurrent function (DNSPTOC) has two settable currentlevels, setting parameters StartCurr_OC1 and StartCurr_OC2. Both features havedefinite time characteristics with settings tDef_OC1 and tDef_OC2 respectively. It ispossible to change the direction of these steps to forward, reverse or non-directionalby setting parameters DirMode_OC1 and DirMode_OC2. At too low polarizingvoltage the overcurrent feature can be either blocked or non-directional. This iscontrolled by settings ActLowVolt1_VM and ActLowVolt2_VM.1MRK 511 287-UEN A Section 6Current protection155Technical manual
