ABB REF 610 - Page 44

k
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
2
3
4
5
6
7
8
9
10
20
30
40
70
60
50
t/s
13456789102 20 I/I>
0.02
0.03
0.04
0.05
0.06
0.07
0.08
0.09
0.1
0.05
0.1
0.2
0.3
0.4
0.6
0.8
1.0
0.5
0.7
0.9
A040319
Fig. 5.1.4.9.-1 Normal inverse-time characteristic
44
REF 610REF 610
Feeder Protection Relay
Technical Reference Manual
1MRS755310