5-76 L90 Line Current Differential System GE Multilin5.4 SYSTEM SETUP 5 SETTINGS55.4.7 FLEXCURVES™a) SETTINGSPATH: SETTINGS ÖØ SYSTEM SETUP ÖØ FLEXCURVES Ö FLEXCURVE A(D)FlexCurves™ A through D have settings for entering times to reset and operate at the following pickup levels: 0.00 to 0.98and 1.03 to 20.00. This data is converted into two continuous curves by linear interpolation between data points. To enter acustom FlexCurve™, enter the reset and operate times (using the VALUE keys) for each selected pickup point (using theMESSAGE UP/DOWN keys) for the desired protection curve (A, B, C, or D).The relay using a given FlexCurve™ applies linear approximation for times between the user-enteredpoints. Special care must be applied when setting the two points that are close to the multiple of pickup of1; that is, 0.98 pu and 1.03 pu. It is recommended to set the two times to a similar value; otherwise, the lin-ear approximation may result in undesired behavior for the operating quantity that is close to 1.00 pu. FLEXCURVE AFLEXCURVE A TIME AT0.00 xPKP: 0 msRange: 0 to 65535 ms in steps of 1Table 5–5: FLEXCURVE™ TABLERESET TIMEMSRESET TIMEMSOPERATE TIMEMSOPERATE TIMEMSOPERATE TIMEMSOPERATE TIMEMS0.00 0.68 1.03 2.9 4.9 10.50.05 0.70 1.05 3.0 5.0 11.00.10 0.72 1.1 3.1 5.1 11.50.15 0.74 1.2 3.2 5.2 12.00.20 0.76 1.3 3.3 5.3 12.50.25 0.78 1.4 3.4 5.4 13.00.30 0.80 1.5 3.5 5.5 13.50.35 0.82 1.6 3.6 5.6 14.00.40 0.84 1.7 3.7 5.7 14.50.45 0.86 1.8 3.8 5.8 15.00.48 0.88 1.9 3.9 5.9 15.50.50 0.90 2.0 4.0 6.0 16.00.52 0.91 2.1 4.1 6.5 16.50.54 0.92 2.2 4.2 7.0 17.00.56 0.93 2.3 4.3 7.5 17.50.58 0.94 2.4 4.4 8.0 18.00.60 0.95 2.5 4.5 8.5 18.50.62 0.96 2.6 4.6 9.0 19.00.64 0.97 2.7 4.7 9.5 19.50.66 0.98 2.8 4.8 10.0 20.0NOTE
