Accessories and Spare Parts
Instruction handbook
b maXX
BM4400, BM4600, BM4700
Document No.: 5.12008.07
275
11
Cable prot
device protection
There are two alternatives for protecting cable and devices:
m
Connecting cable protection fuses and semiconductor fuses in series
m
Using full-range fuses with the tripping characteristic gR (DIN VDE 0636-201 / IEC
60269-2-1 / HD 630.2.1 54).
Dimension the suitable cable and devices protection fuses based on the cross-section of
the power supply cable used, the peak current and the maximum load integral i
2
t
off
.
In contrast to safety fuses, the device and cables may also be fused with the listed circuit
breakers according to UL (DIVQ).
Only circuit breakers without trip delay are approved. Circuit breakers with only a thermal
tripping characteristic are not tested and thus not approved. A particular point to consider
is that, in case of an error, the device is not protected against destruction; instead, only
the system is protected against the risk of fire.
The suitability of circuit breakers depends on the cross-section of the power supply cable
used and the dimensioning of the rated and peak current of the devices.
11.2.1 Fuses BM441X
m
Full-range fuses gR (device and cable)
BM4412, BM4413, design type NH
Bussmann
000 16A/690V: 170M1559
u
20A/690V: 170M1560
u
25A/690V: 170M1561
u
SIBA
000 16A/690V: 2047734/16A
U
00 20A/690V: 2047720/20A
25A/690V: 2047720/25A
0 16A/1000V: 2038404/16A
20A/1000V: 2038404/20A
25A/1000V: 2038404/25A
32A/1000V: 2038404/32A
Siemens
000 16A/690V: 3NE1 813-0
U
00 25A/690V: 3NE8 015-1
U
20A/690V: 3NE8 714-1
25A/690V: 3NE8 715-1
0 32A/1000V: 3NE4 101
Size
Summary of Contents for b maxx BM4400
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