Rockwell Automation 8720MC 8720MC Regenerative Power Supply User Manual - Manual (Page 54)

ATTENTION: Equipment as the 8720MC-RPS
Regenerative Power Supply units using high speed
switching elements generates noise regarding
emission due to noise generated during switching.
To avoid influence of such noise, it is very important
to use as thick and short grounding wire as possible.
ATTENTION: It is required to install a power
disconnecting device, a main magnetic contactor, an
AC reactor and a line filter in the AC input power
line. Failure to observe these precautions could result
in damage to, or destruction of, the equipment.
ATTENTION: When a thyristor or similar equipment
is connected to AC input power line of 8720MC-RPS
Regenerative Power Supply unit, large distortion may
be produced in the AC input power voltage and the
8720MC-RPS Regenerative Power Supply may not
operate normally. Remove such large distortion from
the AC input power voltage.
The capacity (rating) of the 8720MC-RPS Regenerative Power
Supply unit depends on the number of units connected in parallel,
i.e., single unit, two paralleled units, or three paralleled units. The
relation between the number of paralleled units and the unit
capacity is shown in Table 2.1.
Figure 4.6 to 4.8 show typical connection of AC input power wiring
for Model 8720MC-RPS190 unit. Figure 4.6 shows AC input
power wiring for the single unit, and Figures 4.7 and 4.8 show AC
input wiring for parallel connection of two units and three units
respectively. Select appropriate ACL units (reactor assemblies),
8720MC-EF190-VB EMC filter units, disconnects, etc., and
installed them at the positions shown in these figures.
ATTENTION: When two or three paralleled units of
Model 8720MC-RPS190 unit are operated, special
care should be paid to the countermeasure against
noise generated by each of the paralleled units during
switching operation. If each of the paralleled units is
installed in a separate cabinet, be careful for selection
of cabinet and installation of the units.
ATTENTION: The temperature inside the cabinet
must be kept below 40 degree C (104 degree F).
Because Model 8720MC-RPS190 unit generates large
amount of heat, exercise special caution for
exhausting air. Also, be careful for selection of
installation location of the 8720MC-EF190-VB EMC
filter units.
4-16 Wiring
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AC Input Power Wiring
for Model 8720MC-RPS190
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