Rockwell Automation 20L PowerFlex 700L Liquid-Cooled Adjustable Frequency AC Drive - Manual (Page 37)

Frame 2 Installation 2-11
PowerFlex 700L Frames 2, 3A, and 3B Liquid-Cooled AC Drives User Manual
Publication 20L-UM001E-EN-P
Grounding the Drive
The customer must supply a grounding conductor between the ground lug
of the drive and the ground lug in the cabinet. For PE ground terminal
location, see
Figure 2.15 . Tighten the ground connection to the
recommended torque shown in Table 2.B .
Ungrounded or Resistive
Grounded Installations PowerFlex 700L Frame 2 drives are equipped with a common mode input
filter capacitor and MOV that are referenced to ground. If the drive is
installed on a resistive ground or ungrounded distribution system,
disconnect this capacitor and MOV to prevent drive damage.
Disconnecting the Common Mode Capacitor
To disconnect the 1 µF common mode capacitor from the circuit, see
Figure 2.11 and perform the following steps.
1. Disconnect the Faston wire from the 1 µF common mode capacitor.
2. Insulate the wire end by applying a wire nut or electrical tape.
3. Tie wrap the disconnected wire to keep it away from any electrical
connections.
Disconnecting the MOV from Ground
To disconnect the MOV from ground, see Figure 2.11 and perform the
following steps.
1. Unbolt the ground wire lug from the MOV’s ground connection point.
2. Screw the bolt back into the panel.
3. Cut the lug off the disconnected ground wire and apply a wire nut to its
end.
4. Tie wrap the disconnected ground wire to keep it away from any
electrical connections.
For more information on ungrounded distribution systems, see Wiring and
Grounding Guidelines for Pulse Width Modulated (PWM) AC Drives,
publication DRIVES-IN001. Note: Removing the Common Mode capacitor
and input MOVs makes the drive more vulnerable to high voltage line
spikes.
!
ATTENTION: The user is responsible for conforming with all
applicable local, national, and international codes. Failure to
observe this precaution can result in damage to, or destruction of,
the equipment.