Rockwell Automation 20T PowerFlex Diode Bus Supply - Manual (Page 17)

Installation/Wiring 1-5
PowerFlex Diode Bus Supply User Manual
Publication 20T-UM001D-EN-P
Maximum Loading To avoid overloading the Diode Bus Supply, the following requirement
applies:
The DC Input current sum (Normal Duty or Heavy Duty rating at 40 °C/
104 °F) of the connected drive(s) must not exceed the Bus Supply
continuous DC Bus output current rating of 120 amps at 40 °C/104 °F.
For the DC Input Current values of the drives, see tables in the respective
drive documentation.
Table 1.A and Table 1.B provide guidance on the nominal operation of the
Diode Bus Supply. No overload capability is built into the tables.
When an overload is being utilized in connected drives or products, that
overload current must be accounted for in the calculation to properly size
the Diode Bus Supply.
Table 1.A Normal Duty ND
Table 1.B Heavy Duty HD
AC Input Fusing The Diode Bus Supply can be installed with delay type AC input line fuses.
National and local industrial safety regulations and/or electrical codes may
determine additional requirements for these installations.
TIP: When paralleling two Diode Bus Supplies, see Paralleling Diode Bus
Supplies on page 1-11 for details.
Drive Rating Drive DC Input Current Diode Bus Supply
(1)
(1) No overload capability.
DC
Voltage ND
Power ND DC Input
Currents ND DC Input
Current Sum Maximum DC
Output Amps AC Input
Voltage
540V 30 + 22 = 52 kW 61.9 + 47.5 109.4 A 120 A 400V
650V 2 x 40 = 80 Hp 2 x 55.7 111.4 A 120 A 480V
Drive Rating Drive DC Input Current Diode Bus Supply (1)
(1) No overload capability.
DC
Voltage HD
Power HD DC Input
Currents HD DC Input
Current Sum Maximum DC
Output Amps AC Input
Voltage
540V 37 + 2 x 1.5 = 40 kW 95.1 + 2 x 5.3 105.7 A 120 A 400V
!
ATTENTION: The PowerFlex Diode Bus Supply does not
provide branch short circuit protection. Specifications for the
recommended fusing to provide protection against short circuits
are provided in
Table A.A on page A-4 .