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APPENDIX B
APPENDIX B TIME-CURRENT CURVES FOR 51P AND 51N UNITSB.1IEC/BS142 CURVES
For 1<V<1.05 the unit will show a pickup signal and generate no trip.
≤
For 1.05
V<20.00 trip time will be:
≤
For V
20.00, trip time will be the same as for 20 times the setting:
Where:
Table B–1: GE IEC/BS142 INVERSE TIME CURVE CONSTANTS
CURVE NAME
Extremely inverse
Very inverse
Inverse
GEK-113188A
A
IEC Curve C
80
IEC Curve B
13.5
IEC Curve A
0.14
MIGII Digital Protection for Electrical Machines
B.1 IEC/BS142 CURVES
P
Q
B
2
1
0
1
1
0
0.02
1
0
B
K
0
0
0
B-1
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