3-22 Frame 3A and 3B Installation
PowerFlex® 700L Liquid-Cooled Drive User Manual
Publication 20L-UM001D-EN-P
Grounding the Power
Module
Complete drives consist of an Input Filter Bay and a Power Module Bay
(see Figure 3.1
). Complete drives purchased from Rockwell Automation,
Inc. are furnished with a grounding conductor between the ground lug of the
Inverter Power Module and the ground lug in the Input Filter Bay.
However, when power modules are purchased separately and mounted in a
customer's cabinet, the customer must supply a grounding conductor
between:
• Frame 3A — the ground lug of the combined Converter/Inverter Power
Module (or the ground lug of the Dual Inverter Power Module) and the
ground lug in the Input Filter Bay (see Figure 3.23
).
• Frame 3B — the ground lugs of each separate Power Module and the
ground lug in the Input Filter Bay (see Figure 3.24
).
Ungrounded or Resistive
Grounded Installations
PowerFlex 700L Frame 3A and 3B drives are equipped with a common
mode capacitor and MOV that are referenced to ground. To guard against
drive damage, this capacitor and MOV should be disconnected if the drive is
installed on a resistive ground or ungrounded distribution system.
Disconnecting the Common Mode Capacitor
To disconnect the 1 µF common mode capacitor from the circuit, refer to
Figure 3.22
and:
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, refer to Figure 3.22 and:
1. Unbolt the ground wire lug from the MOV’s ground connection point.
Screw the bolt back into the panel.
!
ATTENTION: The user is responsible for conforming with all
applicable local, national, and international codes. Failure to
observe this precaution could result in damage to, or destruction
of, the equipment.
!
ATTENTION: The PowerFlex 700L Liquid-Cooled AC Drive
has not been designed to be used on IT (insulated tera) or
corner-grounded power networks above 600V (phase-to-phase
voltage). Operation on such a network may cause a hazardous
failure of the insulation system of the drive.
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