Rockwell Automation 20T PowerFlex Diode Bus Supply - Manual (Page 23)

Installation/Wiring 1-11
PowerFlex Diode Bus Supply User Manual
Publication 20T-UM001D-EN-P
Figure 1.6 Removing the Phase-to-Ground Jumpers for the MOV, Input FIlter, and
Common Mode Capacitors
Paralleling Diode Bus
Supplies Up to two Diode Bus Supplies can be paralleled for operation. To parallel
Diode Bus Supplies, an AC line reactor must be used at the input of each
Bus Supply (see
Figure 1.7 ). One-percent reactors (catalog number
1321-3R130-A) can be used, unless 3% reactors (catalog number
1321-3R130-B) are required based on the maximum transformer size listed
in
Line Reactors on page A-5 .
When paralleling Diode Bus Supplies, follow these guidelines:
• A maximum of (2) two Diode Bus Supplies can be paralleled.
• Each Diode Bus Supply must be derated by 3%. This results in a DC Bus
continuous output current rating of 233 Amps (0.97 x 2 x 120).
• It is recommended to use AC line fuses with an open fuse indicator. See
AC Input Fusing on page A-4 for details on recommended fusing.
Important: It is recommended to keep all wired connections identical in
size and length. This includes the AC line connection to the
three-phase AC line reactors and from the three-phase AC line
reactors to the Diode Bus Supply.
MOVs
Ground Jumper
To Diode Bridge
Rectifier Unit
To
+DC, -DC
MOV
TB1
R / L1
S / L2
T / L3
PE
GND
12
J3
J2
J4
7 4 1 4 1
Power Supply
Board DFPS
Common Mode
Capacitors
Input Filter
Capacitors
Input Filter and
Common Mode Capacitors
Ground Jumper