Rockwell Automation 8720MC 8720MC Regenerative Power Supply User Manual - Manual (Page 41)

4-3 Wiring
!
!
AC Input Power Wiring
for Model 8720MC-RPS027
and 8720MC-RPS065
!
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 and
an AC reactor in the AC input power line. When
8720MC-RPS027 and 8720MC-RPS065 must
conform with the requirements of CE Mark, install 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 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 4.1 to 4.3 show typical connection of AC input power wiring
for Model 8720MC-RPS027 and 8720MC-RPS065 units. Figure
4.1 shows AC input power wiring for the single unit, and Figures
4.2 and 4.3 show AC input wiring for parallel connection of two
units and three units respectively. Install appropriate reactors,
magnetic contactors, disconnects, line filters, etc. at the positions
shown in these figures.
The phases of the AC input power to the main power supply
terminals L
1
, L
2
and L
3
must be same as the phases of the control
power to the control power terminals L
1AUX
, L
2AUX
, and L
3AUX
. In
case of paralleled units, the phases of the control power L
1AUX
, L
2AUX
,
and L
3AUX
for the slave unit(s) must also be same as those for the
master unit.