Rockwell Automation Allen-Bradley PowerFlex 700AFE, User Manual

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48 Rockwell Automation Publication 20Y-UM001F-EN-P - April 2017
Chapter 1 AFE in IP20 2500 MCC Style Enclosure – Installation/Wiring
Important Guidelines
Read and understand these guidelines:
• If drives
without
internal precharge are used and a disconnect is
installed between the input of the drive and the DC bus, you must use
an external precharge circuit between the disconnect and the DC input
of the drive.
• If drives
with
internal precharge are used with a disconnect switch to the
common bus, you must connect an auxiliary contact on the disconnect
to a digital input of the drive. The corresponding input must be set to
the ‘Precharge Enable’ option. This option provides the proper
precharge interlock, guarding against possible damage to the drive when
connected to a common DC bus.
• The precharge status of the AFE must be interlocked with the
connected drives, such that the drives are disabled (not running) when
the AFE is in a precharge state.
(1) The minimum capacitance is built into the AFE.
(2) The maximum capacitance is the capacitance of the AFE plus the external capacitance.
ATTENTION: If the maximum capacitance is exceeded, component damage
in AFE occurs.