Rockwell Automation 284D On-Machine ArmorStart Accelerator Toolkit - Manual (Page 53)

Publication IASIMP-QS015C-EN-P - August 2011 53
System Layout and Wiring Chapter 2
AC Supply Considerations for Bulletin 284 Units
This section describes AC supply considerations for Bulletin 284 units.
Ungrounded and High-resistive Distribution Systems
Disconnect MOVs
To prevent device damage, the MOVs connected to ground must be disconnected if the device 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, follow this procedure to remove
the jumper.
1. Loosen the four mounting screws before installing the Bulletin 284 device.
2. Unplug the started module from the base unit by pulling forward.
ATTENTION
The Bulletin 284 device contains protective metal oxide variables (MOVs) that are referenced to ground.
These devices should be disconnected if the Bulletin 284 device is installed on an ungrounded and
high-resistive distribution system.
ATTENTION
Do not remove this jumper if the unit is equipped with an EMI filter installed.
The EMI Filter option is required if the Bulletin 284 ArmorStart Distributed Motor Controller must be
CE-compliant. If the EMI Filter is selected, a 3 meter shielded 4-conductor cordset is provided as standard.
is option is only available with sensorless vector control.
Jumper