Engineering
36
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Tripping characteristics
The tripping times for each tripping class are listed in
Table 6.
Figure 2:
Tripping characteristics
(I
r
= Current setting)
Table 6:
Tripping times
Class 30
Class 20
Class 10
Class 10A
10000
1000
100
10
1
1
2
3
4
5
6
7 x I
r
t [s]
CLASS Ir
t
A
[s]
x 3
x 4
x 5
x 6
x 7.2
x 8
x 10
10A
22.3
12.1
7.6
6.0
6.0
6.0
6.0
10
44.5
24.2
15.2
10.5
7.2
6.0
6.0
20
89.0
48.3
30.4
21.0
14.5
11.7
7.5
30
133.5
72.5
45.7
31.4
21.7
17.5
11.2
