40 Rockwell Automation Publication DRIVES-AT005D-EN-P - May 2022
Chapter 4 Non-regenerative Bus Supply Configuration
• The AC input power jumpers (PE-A) and DC bus jumpers (PE-B) must be placed in the correct positions according to the power source
grounding method. The PowerFlex 755T non-regenerative supply is a passive rectifier.
• For recommended settings and instructions for modifying the position of the power jumpers, see the following publications:
- PowerFlex 755TM Non-regenerative Supply user manual, publication 750-UM100
.
- PowerFlex 750-Series Products with TotalFORCE® Control installation instructions, publication 750-IN100
, or PowerFlex 755TM IP00 Open
Type Kits installation instructions, publication 750-IN101.
- PowerFlex 750-Series AC Drive installation instructions, publication 750-IN001
.
- Kinetix 5700 Servo Drives user manual, publication 2198-UM002
.
Precharge Interlocking
For more information about DC bus precharging and inverter precharging circuit configurations, see Precharge on page 11.
• If a disconnect switch is used between the common DC bus and the inverter DC input, the inverter must have precharging capability. In
addition, an auxiliary contact on the disconnect switch that opens when the disconnect is open must be wired to an inverter digital input. The
corresponding digital input must be assigned to the 'Precharge' enable function.
- PowerFlex 750-Series - assign to parameter 0:189 [DI Precharge]. See the PowerFlex 750-Series AC Drives programming manual,
publication 750-PM001
, for more information.
- PowerFlex 755TM - assign to parameter 0:190 [DI Precharge]. See PowerFlex Drives with TotalFORCE Control programming manual,
publication 750-PM100
, for more information.
This configuration provides the proper precharge interlocking, which guards against possible damage to the drive when reconnecting the
drive to an energized DC bus.
• The precharge status of the PowerFlex 755TM non-regenerative supply should be interlocked with the connected drives, such that the drives
are disabled (not running) when the PowerFlex 755TM non-regenerative bus supply is in a precharge state. This can be accomplished with
hardwired I/O connection to the 'Precharge Complete' relay output from the bus supply to the drive enable control via drive local I/O or to
Logix controller I/O and software control of drive enable via communication.
Kinetix 5700 Servo Drives
The Kinetix 5700 servo can be connected to 400/480V AC PowerFlex 755TM common DC bus systems. A capacitor module and other accessories
are required. For more information about applying the Kinetix 5700 to PowerFlex common DC bus systems, see Kinetix 5700 Servo Drives on
page 102.
When a Kinetix 5700 bus group is supplied by a PowerFlex 755TM bus supply, one of the Kinetix 5700 inverters in the bus group must be configured
in the Studio 5000 Logix Designer® application as 'Shared DC - Non-CIP Converter' and the bus supply ready status assigned to the Kinetix 5700
drive 'Regeneration OK' input.
The 'Precharge Complete' relay output of the PowerFlex 755TM non-regenerative bus supply must be connected/interlocked with the 'Regeneration
OK' input of the Kinetix 5700 drive. This connection doesn't signal that DC bus voltage is present but rather when the PowerFlex 755TM non-
regenerative bus supply is ready to supply power, allowing the Kinetix 5700 inverters to be enabled and pull power from the bus.
ATTENTION: The DC bus jumpers for the PowerFlex 755T bus supplies (PE-B),
and all connected PowerFlex inverters (PE-B) and Kinetix 5700 servo drives
(ground screw/jumper), must all be set to the same condition: either all
connected (in) or all removed (out). Risk of equipment damage exists if the DC
bus power jumpers aren’t all set to the same condition.
ATTENTION: The Kinetix family of drives and some PowerFlex AC drives
have no external means of controlling DC bus capacitor precharge;
therefore, a DC disconnect switch must not be used without the use of an
external precharge device. See Precharge on page 11
for more information.
To Next Page
Loading...
Need help?
General
