GE L60, Instruction Manual, Page: 143 / 498

GE Multilin L60 Line Phase Comparison Relay 5-51
5 SETTINGS 5.3 SYSTEM SETUP
5
5.3.5 FLEXCURVES™
a) SETTINGS
PATH: SETTINGS SYSTEM SETUP FLEXCURVES FLEXCURVE A(D)
FlexCurves™ A through D have settings for entering times to Reset/Operate at the following pickup levels: 0.00 to 0.98 /
1.03 to 20.00. This data is converted into 2 continuous curves by linear interpolation between data points. To enter a cus-
tom FlexCurve™, enter the Reset/Operate time (using the
VALUE keys) for each selected pickup point (using the
MESSAGE 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-entered
points. Special care must be applied when setting the two points that are close to the multiple of pickup of
1, i.e. 0.98 pu and 1.03 pu. It is recommended to set the two times to a similar value; otherwise, the linear
approximation may result in undesired behavior for the operating quantity that is close to 1.00 pu.
FLEXCURVE A FLEXCURVE A TIME AT
0.00 xPKP: 0 ms
Range: 0 to 65535 ms in steps of 1
Table 5–5: FLEXCURVE™ TABLE
RESET TIME
MS
RESET TIME
MS
OPERATE TIME
MS
OPERATE TIME
MS
OPERATE TIME
MS
OPERATE TIME
MS
0.00 0.68 1.03 2.9 4.9 10.5
0.05 0.70 1.05 3.0 5.0 11.0
0.10 0.72 1.1 3.1 5.1 11.5
0.15 0.74 1.2 3.2 5.2 12.0
0.20 0.76 1.3 3.3 5.3 12.5
0.25 0.78 1.4 3.4 5.4 13.0
0.30 0.80 1.5 3.5 5.5 13.5
0.35 0.82 1.6 3.6 5.6 14.0
0.40 0.84 1.7 3.7 5.7 14.5
0.45 0.86 1.8 3.8 5.8 15.0
0.48 0.88 1.9 3.9 5.9 15.5
0.50 0.90 2.0 4.0 6.0 16.0
0.52 0.91 2.1 4.1 6.5 16.5
0.54 0.92 2.2 4.2 7.0 17.0
0.56 0.93 2.3 4.3 7.5 17.5
0.58 0.94 2.4 4.4 8.0 18.0
0.60 0.95 2.5 4.5 8.5 18.5
0.62 0.96 2.6 4.6 9.0 19.0
0.64 0.97 2.7 4.7 9.5 19.5
0.66 0.98 2.8 4.8 10.0 20.0
NOTE