ABB REF 610 Technical Reference Manual page 23

1MRS 755535
Feeder Protection Relay
Technical Reference Manual - ANSI Version
t/s
100000
10000
1000
100
10
1
1.05
0
1
CURRENT IN MULTIPLES OF FULL LOAD CURRENT SETTING
Fig. 4.1.4.4.-1 Trip curves when no prior load
REF 610
t[min]
90
60
40
25
15
10
5
1
I/I
10
q
23