Publication 2098-IN003E-EN-P — April 2004
Connecting Your Ultra3000 3-3
Determining Your Type of
Input Power
On the following pages are examples of typical single-phase and
three-phase facility input power wired to single-phase and
three-phase Ultra3000 drives.
The grounded power configuration allows you to ground your
single-phase or three-phase power at a neutral point. Match your
secondary to one of the examples and be certain to include the
grounded neutral connection.
Three-Phase Power Wired to Three-Phase Drives
The following examples illustrate grounded three-phase power wired
to three-phase Ultra3000 drives when phase-to-phase voltage is within
drive specifications.
Figure 3.1
Three-Phase Power Configuration (WYE Secondary)
Note: Feeder and branch short circuit protection is not illustrated.
IMPORTANT
The Ultra3000 (2098-DSD-HVxxx) 460V drives are
designed to operate from grounded or ungrounded
power configurations. For systems requiring CE or
for Ultra3000 (2098-DSD-xxx) 230V drives, the
supply must be grounded.
IMPORTANT
Grounded power (WYE secondary) is the preferred
configuration. Examples with delta secondaries
(though not preferred) are also shown.
L1
L2
L3
TB1
L1
L2
L3
E
L1
L2
L3
L1
L2
L3
Bonded Cabinet
Ground Bus
Transformer (WYE) Secondary
Ultra3000
Three-Phase AC Input
TB1 Terminals
Ground Grid or
Power Distribution Ground
AC Line
Filter
Bonded Cabinet
Ground Bus
Ground Grid or
Power Distribution Ground
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