Eaton PKZM4/XTPR DC1 Series Manual page 36

Engineering
Short-circuit protection
with motor-protective
circuit-breakers
32
Example: I /I = 6, t
A N E
2h
t
20
10
5
2
1
40
20
10
5
2
1
200
50
20
5
2
1.5 2
Figure 5: Tripping characteristic for motor-protective circuit-
breaker
The motor is reliably protected.
The following table 2 shows the short-circuit breaking
capacity of the PKZM4/XTPR...DC1 motor-protective circuit-
breakers.
Fuse can be interconnected in the upstream circuit to
increase the switching capacity to 100 kA.
01/11 MN03402002Z-DE/EN
= 10 s
3 4 6 8 10 15 20 30
I
x r