Extremely Inverse-Time Characteristic - ABB REF610 Technical Reference Manual

1MRS755535
Feeder Protection Relay
Technical Reference Manual - ANSI Version
t/s
70
60
50
40
30
20
10
9
8
7
6
5
4
3
2
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
1 2 3
CURRENT IN MULTIPLES OF SETTING
Fig. 5.1.4.9.-3

Extremely inverse-time characteristic

4 5 6 7 8 9 10 20
REF610 REF610
TD
1.0
0.8
0.6
0.4
0.3
0.2
0.1
0.05
A070035
49