Motor Cable Sizing; Control Signal Wiring Design Considerations - Allen-Bradley PowerFlex 6000T Original Instructions Manual

Chapter 2 Drive Electrical Installation

Motor Cable Sizing

Control Signal Wiring
Design Considerations
36
Do not bundle the input/output cables of the drive together.
The power cable tray must not be less than 300 mm (12 in.).
There must be no gaps where the conduit connects to the cabinet and the
ground bond must be less than 0.1 ohms. Spacing between wire groups is the
recommended minimum for parallel runs of approximately 61 m (200 ft) or
less.
PowerFlex 6000T drives are able to operate motors if the cable length is
IMPORTANT
less than 600 m (1968 ft). Contact the factory when cable lengths at the
drive output exceed 400 m (1398 ft).
When the cable length is longer than 600 m (1968 ft), an assessment is
required. It does not necessarily mean that an output filter is required.
Configurations can be provided for longer cable distances, but must be
specified at the time of order.
All input and output power wiring, control wiring, or conduit must be brought
through the conduit entrance holes of the cabinet. Use appropriate connectors
to maintain the environmental rating of the cabinet.
Voltage drop in motor leads may adversely affect motor starting and running
performance. Installation and application requirements may dictate that
larger wire sizes than indicated in national and local electrical codes are used.
Wire sizes must be selected individually, observing all applicable safety and
national and local electrical codes. The minimum permissible wire size does
not necessarily result in the best operating economy. The minimum
recommended size for the wires between the drive and the motor is the same
as that used if a main voltage source connection to the motor was used. The
distance between the drive and motor can affect the size of the conductors
used.
Consult the Electrical Drawings and appropriate national and local electrical
codes to determine correct power wiring. If assistance is needed, contact your
local Rockwell Automation Sales Office.
Use shielded cables for all analog and digital control cables.
Steel conduit or a cable tray can be used for all PowerFlex 6000T drive power or
control wiring; however, use only steel conduit for all signal wiring.
ATTENTION: Steel conduit is required for all control and signal circuits
when the drive is installed in European Union countries.
Wires for digital and analog signals must be routed separately.
Control cables and power cables must be routed separately; the distance
between the control cable tray and the power cable tray must not be less than
300 mm (11.8 in.).
Rockwell Automation Publication 6000-IN100A-EN-P - August 2020