Installation manual

Frame 12 Installation 9-9
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 -
refer to "Move the Common Mode Jumper to the Disconnected
Position" on page 9-11.
• Should insulate terminal X4 on the Rectifier circuit board- refer to
"Insulate Terminal X4 on the Rectifier Circuit Board" on page 9-12
.
• Must disconnect the small capacitors from the input terminals - refer to
"Disconnect the Small Capacitors from the Input Terminals" on
page 9-13.
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 9-11.
• Must insulate terminal X4 on the Rectifier circuit board- refer to
"Insulate Terminal X4 on the Rectifier Circuit Board" on page 9-12
.
• Must disconnect the small capacitors from the input terminals - refer to
"Disconnect the Small Capacitors from the Input Terminals" on
page 9-13.
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 9-11.
• Must insulate terminal X4 on the Rectifier circuit board- refer to
"Insulate Terminal X4 on the Rectifier Circuit Board" on page 9-12
.
• Must disconnect the small capacitors from the input terminals - refer to
"Disconnect the Small Capacitors from the Input Terminals" on
page 9-13.
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.