ABB REF 610 Technical Reference Manual page 47

1MRS755310
Feeder Protection Relay
Technical Reference Manual
t/s
700
600
500
400
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100
90
80
70
60
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40
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10
9
8
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1
0.9
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1 2 3
Fig. 5.1.4.9.-4 Long-time inverse-time characteristic
4 5 6 7 8 910 20 I/I>
REF 610 REF 610
k
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.05
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