Eaton PKZM0/XTPR BC1 Series - Short-Circuit Protection

Engineering
34
01/11 MN03402003Z-DE/EN
Example: I
A
/I
N
= 6, t
E
= 10 s
Figure 5: Tripping characteristic for motor-protective
circuit-breaker
The motor is reliably protected.
Short-circuit protection of
the motor-protective
circuit-breakers
The following table 2 shows the short-circuit breaking
capacity of the PKZM0/XTPR…BC1 motor-protective
circuit-breakers.
Fuse can be interconnected in the upstream circuit to
increase the switching capacity to 100 kA.
2
5
20
50
200
1
2
5
10
20
40
1
2
5
10
20
2h
1.5 2 3 4 6 8 10 15 20 30
PKZM0-.../
XTPR...BC1
Seconds MinutesMilliseconds
3-phase
2-phase
Rated current
Tripping time