Rockwell Automation 284 ArmorStart User Manual User Manual
Page 57
Installation and Wiring
2-33
AC Supply Considerations for
Bulletin 284 units
Ungrounded and High Resistive Distribution Systems
Disconnecting MOVs
To prevent drive damage, the MOVs connected to ground must be
disconnected if the drive is installed on an ungrounded and high
resistive distribution system where the line-to-ground voltages on any
phase could exceed 125% of the nominal line-to-line voltage. To
disconnect the MOVs, remove the jumper shown in Figure 2.33,
Jumper Removal.
1. Before installing the Bulletin 284, loosen four mounting screws.
2. Unplug starter module from the base unit by pulling forward.
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 and high
resistive distribution system.