Eaton PKZM0/XTPR BC1 Series - Page 38

Short-circuit protection of the
motor-protective circuit-
breakers
35
01/11 MN03402003Z-DE/EN
Table 2: Switching capacity of PKZM0/XTPR…BC1 with
type of coordination "1" and "2"
No upstream protective device required,
as it is the auto-protected range (150 kA)
N Not required
1) Rated uninterrupted current
I
u
2) Conditional rated short-circuit current I
q
according to
IEC/EN 60947-4-1
3) Primary fusing is required if the short-circuit current exceeds the
conditional rated short-circuit current (I
cc
> I
q
).
The conditional rated short-circuit current is determined by the
primary fuse used:
100 A gG/gL, I
q
= 30 kA
50 A gG/gL, I
q
= 100 kA
230 V 400 V 440 V 500 V 690 V
I
u
1)
I
q
2)
I
q
2)
I
q
2)
I
q
2)
I
q
2)
[A] [kA] [A]
3)
[kA] [A]
3)
[kA] [A]
3)
[kA] [A]
3)
[kA] [A]
3)
0.16 – 1 150 N 150 N 150 N 150 N 150 N
1.6
N N N N N
2.5
N N N N5 50
4
N N N N3 50
6.3
N N N42503 50
10
N N 425042503 50
12 50 50 50 50 15 50 15 50 3 50
16 50 50 50 50 15 50 15 50 3 50
20 50 50 50 50 10 50 6 50 3 50
25 50 50 50 50 10 50 6 50 3 50
32 50 50 50 50 10 50 6 50 3 50