the modules, which allows more cabling options. For example, it is possible to use a
number of cables that could not otherwise be evenly distributed between the inverter
modules.
PE
U2
V2
W2
U2
V2
W2
M
3~
U1
W1
V1
PE
Bridging busbars
Inverter unit cubicle(s)
The recommended cable types are given in the technical data.
WARNING!
The bridging can carry the nominal output of one inverter module. In case of
three parallel modules, make sure that the load capacity of the bridging is not
exceeded. For example, if the cabling connects to the output busbars at one
module only, use the module in the middle.
The +H366 option only interconnects the outputs of inverter modules within the same
cubicle, not modules installed in different cubicles. Therefore, when the drive has more
than three inverter modules, make sure that the load is distributed evenly between
the modules:
• In case of two inverter cubicles of two modules, connect the same number of
cables to each cubicle.
• In case of one inverter cubicle with three modules and another with two, each
cubicle requires a number of cables proportional to the number of modules within.
For example, connect three out of five (or six out of ten, etc.) cables to the cubicle
with three modules, the remaining two out of five (four out of ten) cables to the
cubicle with two modules.
￭
Procedure
To get more space for cabling work, you can remove the inverter modules or the fan
carriages of each module. Especially in the case of multiple inverter modules in the
same cubicle, you can consider only removing the fan carriages. This is faster than
removing the entire module, but gives less free space for the work than removing the
module.
Removing an inverter module
Refer to section Removing an inverter module (page 126).
Electrical installation 53
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