ABB ACS880-07, Руководство по оборудованию

Страница: 50 / 274

power and control cable entries at the floor of the cabinet. The entries are equipped with
grommets and 360° grounding hardware.
For non-UL Listed units, bottom entry/exit is the default cabling arrangement.
￭ Top cable entry/exit (oH351 and +H353)
For non-UL Listed units, the default input and output cabling direction is through the bottom
of the cabinet. The top entry (+H351) and top exit (+H353) options provide power and control
cable entries at the roof of the cabinet. The entries are equipped with grommets and 360°
grounding hardware.
For UL Listed (+C129) units, top entry/exit is the default cabling arrangement.
￭ Cable conduit entry (H358)
The option provides US/UK conduit plates (plain 3 mm thick steel plates without any
ready-made holes). US/UK conduit plates are provided as standard with oC129 and
+C134 instead of the normal cable entries.
￭ Common motor terminal cubicle (H359)
As standard, each inverter module must be individually cabled to the motor. This option
provides an additional cubicle containing a single set of terminals for the motor cables.
The width of the cubicle and the size of the terminals within depend on the power rating of
the drive.
Note that this option is not available with E206 (sine filters), In this case, the motor
cables are connected to the sine filter cubicle.
￭ Common output terminal (H366)
As standard, each inverter module must be individually cabled to the motor. This option
adds bridging that connects the outputs of multiple (in practice, two or three) inverter modules
mounted in the same cubicle. 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.
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 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.
50 Operation principle and hardware description