ABB SPAJ 141 C User Manual And Technical Description page 51

t/s
7 0
6 0
5 0
4 0
3 0
2 0
1 0
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
Fig. 4. Inverse-time characteristics of the low-set overcurrent unit in relay module SPCJ 4D24
a) Normal inverse
PAINOS PAINOS
3 4 5 6 7 8 9 1 0
t/s
700
600
500
400
300
200
100
9 0
8 0
7 0
6 0
5 0
4 0
3 0
k
1.0
0.9
2 0
0.8
0.7
0.6
0.5
1 0
0.4
9
8
7
0.3
6
5
0.2
4
3
0.1
2
0.05
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
2 0 I/I>
1 2 3
b) Long-time inverse
4 5 6 7 8 9 1 0 2 0
19
k
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.05
I/I>