Eaton PKZM0-0,16, Руководство пользователя

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2 Engineering
2.3 Short-circuit protection of the motor-protective circuit-breakers
32
PKZM0-…/XTPR…BC1NL, PKZM0-…-T/XTPT…BC1NL 01/22 MN03402003Z-DE/EN www.eaton.com
2.3 Short-circuit protection of the motor-protective circuit-breakers
The following table 2 shows the short-circuit breaking capacity of the
PKZM0-…/XTPR…BC1NL, PKZM0-…-T/XTPT…BC1NL motor-protective
circuit-breakers.
Fuse can be interconnected in the upstream circuit to increase the switching
capacity to 100 kA.
Table 2: Switching capacity of PKZM0-…/XTPR…BC1NL and PKZM0-…-T/XTPT…BC1NL
with type of coordination “1” and “2”
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 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 N 5 50
4 N N N N 3 50
6,3 N N N 42 50 3 50
10 N N 50 50 42 50 3 50
12 50 50 50 50 50 50 15 50 3 50
16 50 50 50 50 50 50 15 50 3 50
20 50 50 50 50 50 50 10 50 3 50
25 50 50 50 50 50 50 10 50 3 50
32 50 50 50 50 50 50 10 50 3 50
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