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3.6 Mains reactor
A mains reactor is required if at least one of the following criteria is
met:
• The output power of the drive is to be increased.
• The short-circuit current rating (SCCR) of the supplying mains is
greater than specified for the drives.
• Current harmonics are to be reduced.
If one drive requires a mains reactor, then all drives connected via the
DC bus must be equipped with mains reactors.
The mains reactor for several drives with a common AC fuse must be
rated in such a way that the nominal current of the mains reactor is
greater than the total of the input current of the drives.
The fuse rating of the fuse upstream of the mains reactor must not be
greater than the nominal current of the mains reactor.
PC/- PA/+ PC/- PA/+
DC+
DC
-
L3
L2
L1
L2 L1L3 L2 L1L3
S2
S3
S1
E3
E2
E1
Figure 10: Wiring of drives with common AC fuse and a mains reactor, exam-
ple shows three-phase drives.
3 Engineering
LXM32
36
Common DC bus
MNA01M001EN, V1.01, 08.2014