ABB ACS880-07, Hardware Manual

Page: 110 / 274

„
PE
U2
V2
W2
U2
V2
W2
M
3~
U1
W1
V1
PE
Inverter unit cubicle(s)
￭ Motor connection diagram (with H366)
With H366, the output busbars of the inverter modules within the same cubicle
are connected by bridging busbars. The bridging balances the motor current between 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 chapter Technical data , section Output cable
sizes .
WARNING!
The bridging can carry the nominal output of one inverter module. In case of three
parallel modules, ensure 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.
Note:
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 multiple inverter
cubicles (ie. two cubicles of two modules each), make sure that the motor cabling is identical
for both cubicles.
110 Electrical installation