Installation manual

Frame 11 Installation 8-9
Ungrounded, High Resistive
Ground or Grounded B
Phase Delta Installations
Frame 11 size drives are equipped with common mode capacitors. 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 -
refer to "Move the Common Mode Jumper to the Disconnected
Position" on page 8-11.
• Should insulate terminal X4 on the Rectifier circuit board- refer to
"Insulate Terminal X4 on the Rectifier Circuit Board" on page 8-12
.
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 -
refer to "Move the Common Mode Jumper to the Disconnected
Position" on page 8-11.
• Must insulate terminal X4 on the Rectifier circuit board- refer to
"Insulate Terminal X4 on the Rectifier Circuit Board" on page 8-12
.
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 -
refer to "Move the Common Mode Jumper to the Disconnected
Position" on page 8-11.
• Must insulate terminal X4 on the Rectifier circuit board- refer to
"Insulate Terminal X4 on the Rectifier Circuit Board" on page 8-12
.
Note: Refer to 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.