Figure 2-11
shows the cutoff characteristics of the circuit breaker.
Use a breaker with cutoff characteristics that have a Long-time delay type equivalent
to cutoff characteristic D (IEC/EN60898 or DIN VDE 0641 part II) shown in
2-11, or one with longer cutoff characteristics.
Figure 2-11 Distribution panel breaker characteristics on the equipment side
180
120
Minute
Second
0.06
0.04
0.02
0.01
60
40
20
10
6
4
2
1
40
20
10
6
4
2
1
0.6
0.4
0.2
B
C
0.1
1
1.5
2
3
4 5 6 7 8 10
Current (Scaling factor against rated current)
Chapter 2 Planning and Preparing for System Installation
D
15
20
30 40 50
80 100
Figure
31
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