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Multiple mains fuses Multiple mains fuses are required A single fuse is sufficient if the total
input current of all drives connected via the common DC bus is less
than the maximum fuse rating shown in the table below.
Multiple mains fuses Maximum fuse rating
LXM32∙U60N4, LXM32∙D12N4,
LXM32∙D18N4, LXM32∙D30N4,
LXM32∙D72N4
A 32
LXM32∙D85N4, LXM32∙C10N4 A 63
If multiple mains fuses are required, additional DC bus fuses must be
used upstream of each drive. The DC bus fuses must be suitable for
600 Vdc.
DC bus fuses Maximum fuse rating
LXM32∙U60N4, LXM32∙D12N4,
LXM32∙D18N4, LXM32∙D30N4,
LXM32∙D72N4
A 32
LXM32∙D85N4, LXM32∙C10N4 A 63
PC/- PA/+ PC/- PA/+ PC/- PA/+
L3
L2
L1
L2 L1L3 L2 L1L3L2 L1L3
DC+
DC
-
Figure 5: Multiple mains fuses for three-phase drives
See chapter "6.2 DC fuses" for fuses for the DC bus.
The use of mains reactors can reduce the input current. Due to the
lower input current, it may be possible to operate the drives with just a
single mains fuse.
3 Engineering
LXM32
28
Common DC bus
MNA01M001EN, V1.01, 08.2014