Rockwell Automation 284D ArmorStart - Getting Started - Manual (Page 19)

Publication 284D-QS001D-EN-P - July 2006
19
AC Supply Considerations
Ungrounded Distribution Systems
Disconnecting MOVS
To prevent drive damage, the MOVs connected to ground shall be
disconnected if the drive is installed on an ungrounded distribution system
where the line-to-ground voltages on any phase could exceed 125% of the
nominal line-to-line voltage. To disconnect these devices, remove the
jumper shown in Figure 13, Jumper Removal.
1. Before installing the Bulletin 284, loosen four mounting screws.
2. Unplug control module from the base unit by pulling forward.
Figure 12 Removal of Control Module
ATTENTION
!
The Bulletin 284 contains protective MOVs that are
referenced to ground. These devices should be
disconnected if the Bulletin 284 is installed on an
ungrounded distribution system.