GE Multilin L60 Line Phase Comparison System 5-1355 SETTINGS 5.5 GROUPED ELEMENTS5The FORCE SELF-POLAR and FORCE MEM-POLAR settings should never be asserted simultaneously. If this happens, the logicwill give higher priority to forcing self-polarization as indicated in the logic below. This is consistent with the overall philoso-phy of distance memory polarization.The memory polarization cannot be applied permanently but for a limited time only; the self-polarization may beapplied permanently and therefore should take higher priority.The distance zones of the L60 are identical to that of the UR-series D60 Line Distance Relay. For additional infor-mation on the L60 distance functions, see the Theory of Operation chapter of the D60 manual, available on the GEEnerVista CD or free on the GE Digital Energy web page.Figure 5–55: MEMORY VOLTAGE LOGICb) PHASE DISTANCEPATH: SETTINGS GROUPED ELEMENTS SETTING GROUP 1(6) DISTANCE PHASE DISTANCE Z1(Z3) PHASE DISTANCE Z1PHS DIST Z1FUNCTION: DisabledRange: Disabled, EnabledMESSAGE PHS DIST Z1 DIR:ForwardRange: Forward, Reverse, Non-directionalMESSAGE PHS DIST Z1SHAPE: MhoRange: Mho, QuadMESSAGE PHS DIST Z1 XFMR VOLCONNECTION: NoneRange: None, Dy1, Dy3, Dy5, Dy7, Dy9, Dy11, Yd1, Yd3,Yd5, Yd7, Yd9, Yd11MESSAGE PHS DIST Z1 XFMR CURCONNECTION: NoneRange: None, Dy1, Dy3, Dy5, Dy7, Dy9, Dy11, Yd1, Yd3,Yd5, Yd7, Yd9, Yd11MESSAGE PHS DIST Z1REACH: 2.00 ohmsRange: 0.02 to 500.00 ohms in steps of 0.01MESSAGE PHS DIST Z1RCA: 85°Range: 30 to 90° in steps of 1MESSAGE PHS DIST Z1 REVREACH: 2.00 ohmsRange: 0.02 to 500.00 ohms in steps of 0.01MESSAGE PHS DIST Z1 REVREACH RCA: 85°Range: 30 to 90° in steps of 1MESSAGE PHS DIST Z1COMP LIMIT: 90°Range: 30 to 90° in steps of 1MESSAGE PHS DIST Z1DIR RCA: 85°Range: 30 to 90° in steps of 1NOTENOTE827842A9.CDRUse V_1Use V_1 memoryANDANDORANDANDS QRRUNUpdate memorySETTINGOff = 0Force Memory Polarization| V_1 | < 1.15 pu| Vrms – | V | | < Vrms / 8| Vrms – | V | | < Vrms / 8| Vrms – | V | | < Vrms / 8| V_1 | > 0.80 pu| IA | < 0.05 pu| IB | < 0.05 puSETTINGOff = 0Force Self PolarizationSETTING= VA, Vrms_A= VB, Vrms_BDistance Source= VC, Vrms_C= V_1= IA= IB= IC | IC | < 0.05 pu| V_1 | < 0.10 puTIMER5 cycles0TIMER6 cycles0ANDANDORSETTINGMemory duration0T resetTracking Freq, *SRCx Freq= IC| f - f | > 1 HzTRACK SRC*SRCx is the source used in distance L90 Only
