Flexcurves - GE T60 Instruction Manual

5 SETTINGS
The switch element has direct hard-coded connections to IEC 61850 model as shown in the logic diagram. This allows
remote open/close operation of each switch, using either CSWI or XSWI IEC 61850 logical nodes. IEC 61850 select-
before-operate functionality, local/remote switch functionality along with a blocking open/close commands are provided.
Note that IEC 61850 commands are event-driven and dwell time for these is one protection pass only. If you want to main-
tain close/open command for a certain time, do so either on the contact outputs using the "Seal-in" setting or in FlexLogic.
a) SETTINGS

PATH: SETTINGS SYSTEM SETUP
 FLEXCURVE A

FlexCurves A through D have settings for entering times to reset and operate at the following pickup levels: 0.00 to 0.98
and 1.03 to 20.00. This data is converted into two continuous curves by linear interpolation between data points. To enter a
custom FlexCurve, enter the reset and operate times (using the VALUE keys) for each selected pickup point (using the
MESSAGE UP/DOWN keys) for the desired protection curve (A, B, C, or D).
Table 5–15: FLEXCURVE TABLE
RESET TIME RESET
MS
0.00 0.68
0.05 0.70
0.10 0.72
0.15 0.74
0.20 0.76
0.25 0.78
0.30 0.80
0.35 0.82
0.40 0.84
0.45 0.86
0.48 0.88
0.50 0.90
0.52 0.91
0.54 0.92
0.56 0.93
0.58 0.94
0.60 0.95
0.62 0.96
0.64 0.97
0.66 0.98
GE Multilin
 

FLEXCURVES

FLEXCURVE A(D)
FLEXCURVE A TIME AT
0.00 xPKP:
TIME OPERATE TIME
MS MS
1.03
1.05
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
T60 Transformer Protection System
Range: 0 to 65535 ms in steps of 1
0 ms
OPERATE TIME OPERATE
MS
2.9 4.9
3.0 5.0
3.1 5.1
3.2 5.2
3.3 5.3
3.4 5.4
3.5 5.5
3.6 5.6
3.7 5.7
3.8 5.8
3.9 5.9
4.0 6.0
4.1 6.5
4.2 7.0
4.3 7.5
4.4 8.0
4.5 8.5
4.6 9.0
4.7 9.5
4.8 10.0
5.4 SYSTEM SETUP
5.4.7 FLEXCURVES
TIME OPERATE TIME
MS MS
10.5
11.0
11.5
12.0
12.5
13.0
13.5
14.0
14.5
15.0
15.5
16.0
16.5
17.0
17.5
18.0
18.5
19.0
19.5
20.0
5-127
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