30 Rockwell Automation Publication 20D-TD002L-EN-P - July 2018
PowerFlex 700S Drives with Phase II Control
Installation Considerations
Power Wiring
By providing built in input MOVs (line to line and line to ground) for robust transient protection, ground fault and
short circuit protection, electronic motor overload, built in noise filtering, patented reflected wave reduction software,
and others, the PowerFlex 700S design addresses many of the concerns in a typical installation.
Peak Voltage Protection for Motors with Lower Insulation Systems
While the PowerFlex 700S Phase II drive contains the very best in reflected wave reduction techniques, some motors may
have insulation systems with values well below the NEMA/UL standards. While these motors may perform to
expectations, they must be protected from the reflected wave transients that all PWM drives produce. Refer to
publication
DRIVES-IN001, Wiring and Grounding Guidelines for Pulse Width Modulated (PWM) AC Drives, for
cable length recommendations and Page 22 for reflected wave reduction options.
Proper Grounding and Related Noise Reduction
The starting point for any solid drive installation is proper grounding techniques. Most commonly observed noise
problems can be easily eliminated with quality installation practices. Refer to publication
DRIVES-IN001, Wiring and
Grounding Guidelines for Pulse Width Modulated (PWM) AC Drives, for complete information.
The block diagram below also provides direction on other installation issues and concerns.
Branch Circuit Protection Devices - Page 64
Input Power Conditioning - Page 23
Emission Control Device
LCD Human Interface Module
Reflected Wave Reduction - Page 22
Cable Requirements - Page 32
Class 10 Electronic Motor Overload Protection-
Integral to the PowerFlex 700S
Motor Recommendations - See Publication
MOTORS-PP006
AC Input DC Input
Input Fuses
Not Used
Same as AC
Same as AC
Motor Cable Length - Page 33
Removable MOV and Caps (underneath cover) -
See PowerFlex 700S Phase II Drives, Frames 1…6
Installation Instructions, publication
20D-IN024, for
locations and instructions
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