Rockwell Automation 21G PowerFlex 750-Series AC Drives - Manual (Page 132)

132 Rockwell Automation Publication 750-IN001N-EN-P - April 2014
PowerFlex 750-Series AC Drives
Shield Termination - SHLD
The Shield terminal (see page 134 ) provides a grounding point for the motor
cable shield. It must be connected to an earth ground by a separate continuous
lead. The motor cable shield should be connected to this terminal on the drive
(drive end) and the motor frame (motor end). Use a shield terminating or EMI
clamp to connect shield to this terminal.
RFI Filter Grounding
Using an optional RFI filter may result in relatively high ground leakage currents.
Therefore, the filter must only be used in installations with grounded AC
supply systems and be permanently installed and solidly grounded
(bonded)
to the building power distribution ground. Be sure that the incoming supply
neutral is solidly connected (bonded) to the same building power distribution
ground. Grounding must not rely on flexible cables and should not include any
form of plug or socket that would permit inadvertent disconnection. Some local
codes may require redundant ground connections. The integrity of all
connections should be periodically checked. Refer to the instructions supplied
with the filter.
Power Cable Types Acceptable for 200…600 Volt Installations
For detailed information on a variety of cable types that are acceptable for drive
installations, refer to Wiring and Grounding Guidelines for Pulse Width
Modulated (PWM) AC Drive, publication
DRIVES-IN001 .
Wire Recommendations
ATTENTION: National Codes and standards (NEC, BSI and so forth) and local codes
outline provisions for safely installing electrical equipment. Installation must comply
with specifications regarding wire types, conductor sizes, branch circuit protection and
disconnect devices. Failure to do so may result in personal injury and/or equipment
damage.
Type Description Min. Insulation Rating
Power (1)(2)
(1) Control and signal wires should be separated from power wires by at least 0.3 meters (1 foot).
(2) The use of shielded wire for AC input power may not be necessary but is always recommended.
Standard • Four tinned copper conductors with XLPE
insulation.
• Copper braid/aluminum foil combination
shield and tinned copper drain wire.
• PVC jacket.
600V,
75 °C (167 °F)