Grounding the power module, Ungrounded or resistive grounded installations, Disconnecting the mov from ground – Rockwell Automation 20L PowerFlex 700L Liquid-Cooled Adjustable Frequency AC Drive User Manual
Page 70
3-22
Frame 3A and 3B Installation
PowerFlex 700L Frames 2, 3A, and 3B Liquid-Cooled AC Drives User Manual
Publication 20L-UM001E-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 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 as follows:
• Frame 3A—between 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—between the ground lugs of each separate Power Module and
the ground lug in the Input Filter Bay (see
).
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. If the drive is
installed on a resistive ground or ungrounded distribution system,
disconnect this capacitor and MOV to guard against drive damage.
Disconnecting the Input Filter Common Mode Capacitor
To disconnect the 1 µF common mode capacitor from the circuit, see
Figure 3.22
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 3.22
and perform the
following steps.
1. Unbolt the ground wire lug from the MOV’s ground connection point.
!
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 can cause a hazardous
failure of the insulation system of the drive.