Rockwell Automation 8720MC 8720MC Regenerative Power Supply User Manual User Manual
Page 45
4-7
Wiring
When Model 8720MC-RPS027 or 8720MC-RPS065 is operated in
the Power Regeneration Mode only
Figure 4.4
Wiring Model 8720MC-RPS027 or 8720MC-RPS065 Unit
Used as a Converter for the Power Regeneration Mode Only
It is possible to select the 8720MC-RPS units depending on the
regenerative power when only regenerated power of the unit
integrating converter and inverter is used. In this case, however,
the following cautions must be observed. Figure 4.4 shows wiring
of the 8720MC-RPS027 or 8720MC-RPS065 unit used as a
converter for the power regeneration mode only.
8720MC-RPS027
and
8720MC-RPS065
Main
Magnetic
Contactor
(MC1)
MC1
100 to 115 VAC
or
200 to 230 VAC
L
1
L
2
L
3
P
N
G
L
1AUX
L
2AUX
L
3AUX
PR1
PR2
PR3
MC1
MC2
PWR
READY
MC
24V
Circuit
Breaker
(CB2)
Circuit
Breaker
(CB1)
L
1
L
2
L
3
MC1
RUN On/Off
U
V
W
P
N
G
To AC Motor
Reactor
Reactor
Inverter
(Load Equipment)
8720MC-RPS
Regenerative Power
Supply Unit
(Dedicated for Power
Regeneration Mode)
Harmonic
Filter
Varistor
Fuse
1> The phases of the AC input power to the main supply terminals L
1
, L
2
and L
3
must be same as those of the control power
to the control power terminals L
1AUX
, L
2AUX
and L
3AUX
.
2> It is recommended to install the DC bus protection fuses on the both lines to the terminals P and N to prevent ground fault,
when plural number of load equipment is connected to the 8720MC-RPS Regenerative Power Supply.
3> Turn ON the switch SW7-1 on the Regulator Board without fail.
4> Wiring to be taken into cabinet must be as short as possible.
5> This connection is only used with AC input drives.
6> The length of the wiring from the E terminal of the Harmonic Filter to the Grounding Terminal must be as short as possible.
7> The physical location of the Harmonic Filter and Varistor relative to the Contactor and Line Reactor is important.
Connect these devices in the relative positions shown in this illustration.
8> Because driving current of sequence input signals is 5mA and below, use a contact of which minimum applicable load is 5mA and below.
9> Use the reactor in maximum surrounding air temperature of 55 degree C (131 degree F) and below.
Protection Fuse <2
Single Phase
Line Filter
Line Filter for
AC Input Power
<1
<2
<7
<8
<9
<6
E
READY