18 Rockwell Automation Publication 22C-UM001J-EN-E - January 2017
Chapter 1 Installation/Wiring
Storage
• Store within an ambient temperature range of -40° to +85°C.
• Store within a relative humidity range of 0% to 95%,non-condensing.
• Do not expose to a corrosive atmosphere.
AC Supply Source
Considerations
Ungrounded Distribution Systems
Disconnecting MOVs (Drive Frames C, E and F only.)
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 6
.
Figure 5 - Phase to Ground MOV Removal
Figure 6 - MOV Jumper Location
ATTENTION: PowerFlex 400 drive frames contain protective MOVs that are
referenced to ground. These devices must be disconnected if the drive is
installed on an ungrounded or resistive grounded distribution system.
R/L1
S/L2
T/L3
123
4
Three-Phase
AC Input
Jumper
Frame C Frame E and F (Typical)
Important:
Tighten screw after jumper removal.
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