Manual

Rockwell Automation Publication PFLEX-IN006E-EN-P - July 2013 109
Frame 12 Mechanical Installation Chapter 8
Ungrounded, High Resistive
Ground or Grounded B Phase
Delta Installations
Frame 12 size drives are equipped with common mode capacitors and capacitors
that are connected to the input terminals. To guard against drive damage, these
capacitors should be disconnected depending upon the type of ground system on
which the drive is installed.
Installation on an Ungrounded Distribution System or High Resistive
Ground
If you are installing a 400/480V AC input drive on an ungrounded distribution
system or high resistive ground, you:
• Must move the common mode jumper to the disconnected position - see
Move the Common Mode Jumper to the Disconnected Position on page
111
.
• Should insulate terminal X4 on the Rectifier circuit board- see Insulate
Terminal X4 on the Rectifier Circuit Board on page 112
.
• Must disconnect the small capacitors from the input terminals - see
Disconnect the Small Capacitors from the Input Terminals on page 113
.
If you are installing a 600/690V AC input drive on an ungrounded distribution
system or high resistive ground, you:
• Must move the common mode jumper to the disconnected position - see
Move the Common Mode Jumper to the Disconnected Position on page
111
.
• Must insulate terminal X4 on the Rectifier circuit board- see Insulate
Terminal X4 on the Rectifier Circuit Board on page 112
.
• Must disconnect the small capacitors from the input terminals - see
Disconnect the Small Capacitors from the Input Terminals on page 113
.
Installation on a Grounded B Phase Delta System
If you are installing a drive on a grounded B phase Delta system, you:
• Must move the common mode jumper to the disconnected position - see
Move the Common Mode Jumper to the Disconnected Position on page
111
.
• Must insulate terminal X4 on the Rectifier circuit board- see Insulate
Terminal X4 on the Rectifier Circuit Board on page 112
.
• Must disconnect the small capacitors from the input terminals - see
Disconnect the Small Capacitors from the Input Terminals on page 113
.
Note: See Wiring and Grounding Guidelines for Pulse Width Modulated
(PWM) AC Drives, Installation Instructions, publication DRIVES-IN001
, for
additional information on an ungrounded distribution system or high resistive
ground installation.