Rockwell Automation 1395 Digital DC Drive FRN 5-10.10/9.30 - Manual (Page 139)

Chapter 6
Installation
6-15
Connect incoming three-phase AC line power to the AC line fuses or to
the bus bar on the 125-600 HP drive. The fuses supplied are designed
to provide protection against short circuits for the drive semiconductors
and associated output wiring. They are not to be considered a substitute
for the user supplied motor branch circuit protective devices that are
required by the National Electrical Code. Refer to Tables 6.R and 6.S
for proper sizing of the AC power and branch fuses.
ATTENTION: The motor field supply is phase sensitive. To
guard against possible drive/motor damage, assure that the
connections are properly made according to Figure 6.8 & 6.9.
!
Figure 6.8
Power Connections – Standard Field Voltage
M
A1+ A2
A1 A2
ЙЙЙЙЙ
ЙЙЙЙЙ
ЙЙЙЙЙ
ЙЙЙЙЙ
DC Contactor
FRONT VIEW OF
DRIVE
1-30HP, 230VAC
2-60HP, 460VAC
Series B
F1+ F2–
DC Motor Shunt Field*
1 3
TB1
2 4
Line Reactor or Isolation Transformer
F1
F2
F3
Factory Wiring
Factory Wiring
L1 L2 L3
* Typical motor connection. Refer to motor
data for specific motor connections.
IMPORTANT
If the AC input power system does not
have a neutral or one phase referenced
ground, an isolation transformer with
the neutral of the secondary grounded is
highly recommended. If the line-to-line
voltages on any phase can exceed 125%
of the nominal line-to-line voltage, an
isolation transformer with the neutral of
the secondary grounded, is always
required.
PE