Seg XRI1-IR, Manual

Page: 30 / 36

30 TB XRI1-IR 02.00 E
8.4 Inverse time characteristics
1 2 3 4 5 6 7 8 9 10 20
I/I
S
0.1
1
10
100
1000
t[s]
t
I>
=
3.0
10.0
8.0
6.0
4.0
2.0
0.05
0.1
0.2
0.3
0.4
0.5
0.6
0.8
1.0
1.4
Figure 8.1: Normal Inverse (type A)
1 2 3 4 5 6 7 8 9 10 20
I/I
S
0.01
0.1
1
10
100
1000
t[s]
t
I>
=
10.0
8.0
6.0
4.0
3.0
2.0
0.05 0.1
0.2
0.3
0.4
0.5
0.6
0.8
1.0
1.4
Figure 8.2: Extremely Inverse (type C)
1 2 3 4 5 6 7 8 9 10 20
I/I
S
0.1
1
10
100
1000
t[s]
t
I>
=
10.0
8.0
6.0
4.0
3.0
2.0
0.05
0.1
0.2
0.3
0.4
0.5
0.6
0.8
1.0
1.4
Figure 8.3: Very Inverse (type B)
1 10
I/I
N
0.01
0.1
1
10
100
t[s]
t
I
>
I>>
t
I
>>
260
0.03
1.0 40
2.0
0.03
I>
0.02 4.0
Figure 8.4 Definite time overcurrent relay