Rockwell Automation Allen-Bradley PowerFlex SCR, User Manual

Page: 29 / 68

Installation/Wiring 1-15
PowerFlex SCR Bus Supply User Manual
Publication 20S-UM001G-EN-P
Parallel Connection of Slave
Units
Up to four 1000A PowerFlex SCR Bus Supply Slave units may be
connected in parallel with one 1000A Master. The derate for each additional
slave is 5% plus 5% for the master. Thus, the maximum possible output
rating without altitude or ambient derating is 4750 Amps (0.95 x 5 x 1000
amps) at 40 °C.
Figure 1.10 Example for Master-Slave Configuration
(shown without circuit protection for clarity)
DC Bus
Power
Input
Master Unit Slave Unit #1 Slave Unit #n
Precharge
Board
Enable
Contactor
Gate
Driver
Gate
Driver
Gate
Driver
Cable Cable
Main Switch or
Main Input Contactor
Up to 5 Units Maximum
(4750A Maximum DC Bus Current
without altitude or ambient derating)
Aux. Supply
115 VAC