Rockwell Automation Publication 750-RM004A-EN-P - April 2018 51
Selection Considerations Chapter 1
DC Input Electrical Cross
Reference
The following tables are used to cross reference 540/650/810/932V DC input
PowerFlex 700S drives to DC input PowerFlex 755TM common bus inverters.
Although PowerFlex 755T light duty (LD) ratings are available, these ratings
are not shown in the following tables because there are no equivalent light duty
ratings for PowerFlex 700S drives.
Use Table 2 0
to decide whether you need a PowerFlex 755TM common bus
inverter with or without precharge.
Table 20 - Suggested Migration Solutions
Existing PowerFlex 700S Configuration Suggested PowerFlex 755TM Common Bus Inverter Solution
Separate precharge circuit is not used.
IMPORTANT: The only instance where a drive precharge is not required is; if it is never
possible to energize the DC input common bus inverter onto a fully charged DC bus. The
common bus inverter must NOT have a DC input disconnect and all precharging of the
DC bus supply and connected common bus inverter is controlled by the DC bus supply or
other separate precharge circuit.
PowerFlex 755TM common bus inverter without precharge, input catalog code (-E).
ATTENTION: Applying a PowerFlex 755TM common bus inverter without precharge
with an existing DC disconnect or with no method of safely precharging the DC bus
capacitors in the drive can result in serious damage and destruction to the DC bus
supply and PowerFlex 755TM common bus inverter.
WARNING: Failure to apply this equipment may cause dangerous over currents,
possible explosion, and arc flash conditions can lead to personal injury or death.
All other applications with separate drive precharge circuits PowerFlex 755TM common bus inverter with precharge, input catalog code (-F)
AC Input Power Source Choose a PowerFlex 755TL or PowerFlex 755TR.
The PowerFlex 700S AC input uses a 6-pulse, nonregenerative converter/rectifier. See
the AC Input Electrical Cross-reference
on page 46.
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