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Rockwell Automation Publication 20Y-UM001F-EN-P - April 2017
173
Application Notes
Appendix C
When completed, the AFE control closes the MCCB.
b. To connect the AFE to the DC bus, close the DC disconnect.
When disconnecting the AFE from the DC bus, follow these steps in
the order shown.
a. Stop the inverters and AFEs connected to the same DC bus from
modulating.
The AFE load must be zero before being disconnected to reduce the
load on the MCCB.
b. Open the MCCB of the AFE.
c. Open the DC disconnect switch.
d. Restart the other AFE units.
• When AFEs are paralleled, the DC bus voltage at regeneration is 5%
higher than with one AFE due to the 5% droop. See Drives in Common
Bus Configurations, publication
, for supported drives
that can be used in the various AFE configurations.
•
shows an example of paralleling two AFEs in
their IP21 Rittal enclosures, where each AFE has its own precharging
circuit, precharging control, and fusing on the DC bus output and input
contactor.
In this case, turn the disconnects (Q0) of all AFEs to ON, and set all
MCCB CONTROL selector switches on the door to AUTO to enable
automatic operation.
When turning on the main power, the two AFEs precharge
automatically. After charging, the MCCB motor-controlled circuit
breakers (Q1) are closed and the AFEs start the modulation. The
control signal ‘Inverter Enable’ shown in
used to interlock the drives connected to the DC bus.
Содержание Allen-Bradley PowerFlex 700AFE
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Страница 124: ...124 Rockwell Automation Publication 20Y UM001F EN P April 2017 Chapter 4 Programming and Parameters Notes ...
Страница 136: ...136 Rockwell Automation Publication 20Y UM001F EN P April 2017 Chapter 5 Troubleshooting Notes ...
Страница 158: ...158 Rockwell Automation Publication 20Y UM001F EN P April 2017 Appendix A Supplemental Information Notes ...
Страница 164: ...164 Rockwell Automation Publication 20Y UM001F EN P April 2017 Appendix B HIM Overview Notes ...
Страница 180: ...180 Rockwell Automation Publication 20Y UM001F EN P April 2017 Index by number 120 linear list 120 viewing 163 ...
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