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