Rockwell Automation Publication 750-RM004A-EN-P - April 2018 33
Selection Considerations Chapter 1
Note the following regarding PowerFlex 755TM common bus inverter user-
supplied 240V AC primary control power:
• External user-supplied 240V AC primary control power source must be
240V AC, 50/60 Hz, 1 PH, and must have the neutral conductor
grounded.
• User-supplied branch circuit protection is required to protect the
240V AC control circuit connectors and busbars.
• If the total 240V AC control power current exceeds 100 A, you must
split the control bus and apply separate 240V AC control power to
groups of drives.
Table 4 - Standard and Optional Control Power Comparison
Description PowerFlex 700S PowerFlex 755TL/TR and PowerFlex 755TM Common Bus Inverter
240V AC Primary
Control Power
— (s) Primary 240V AC, 1 PH, control busbars, 100 A.
(s) PowerFlex 755TL/TR (input type catalog code F and G) internal 240V
AC 1phase 50/60Hz control transformer(s).
(s) PowerFlex 755TM common bus inverter (input type catalog code D
and E), require user-supplied 240V AC 1 phase 50/60 Hz control power.
See Tabl e 5
for 240V AC power requirements.
• The PowerFlex 755T packaged product uses the primary 240V AC
control busbars to supply 240V AC, 1 PH, control power to various
circuits. Primary control power is required.
• PowerFlex 755TM common bus inverter (DC input type catalog code D
and E) cannot be specified with the optional control transformer.
24V DC Auxiliary
Control Power
— (s) Auxiliary 24V DC busbars, 100 A.
• User-supplied 24V DC control power. See Specifications and Features
table in this document for PowerFlex 755T 24V DC power
requirements.
• The PowerFlex 755T packaged product uses these busbars to supply
24V DC auxiliary power to various circuits if the 240V AC primary
control power is shut off.
120/240V AC User
Control Power
— (s) User 120/240V AC control busbars, 100 A.
• User-supplied 120V AC or 240V AC, 1 PH, control power.
• The User 120/240V AC control power and busbars are not used by
PowerFlex 755T product.
Table 5 - PowerFlex 755TM Common Bus Inverter 240V AC Control Power Requirements
Common Bus
Inverter DC Input
Frame
Required With DC Precharge
(Input Type Code D) (Arms)
Required Without DC Precharge
(Input Type Code E) (Arms)
Required for Optional Wiring Bays (Arms)
IP21 Enclosure IP54 Enclosure IP21 Enclosure IP54 Enclosure Entry
(Power Opt Code –P16)
Exit
(Power Opt Code –P15)
8 5.5 7.5 3.5 5.5 — 0.39
9 10.3 12.4 6.3 8.4 — 0.39
10 15.2 19.2 9.2 13.2 — 0.39
11 20.0 24.1 12.0 16.1 — 0.39
12 24.9 30.9 14.9 20.9 — 0.39
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