Rockwell Automation SD3100 DISTRIB PWR SYS SD3100 DC PWR MODULE - Manual (Page 23)

Mechanical/Electrical Description 2-9
2.3 1250A Power Module Description
The 1250A Power Module is supplied in the configurations shown in table 2.1. The
1250A Power Module has the following features:
• The 1250A Power Module uses twelve SCRs (regenerative) or six SCRs
(non-regenerative) in the armature bridge to convert the 3-phase AC input to a DC
output. The SCRs are built into a heatsink assembly that is cooled by the bridge fan.
• The 1250A Power Module is protected from incoming fault currents by a circuit
breaker or input line fuses. The components of the Power Module (the armature
bridge, field bridge, and control components) are protected by fuses, MOVs,
snubbers, and/or chokes.
• The 1250A Power Module is constructed and housed in three bays. The first bay
contains the AC input and control hardware, the second bay contains the armature
bridge hardware, and the third bay contains the DC output hardware.
• The 1250A Power Module can be built to allow alternative input entry, using either
an optional bottom-entry bay (on the left of the disconnect bay) or an optional
top-hat extension over the AC input bay.
• The 1250A Power Module can be built with an optional through bus assembly,
allowing the 1250A Power Module and other connected Power Modules to tap off
power from the same AC input.
Figures 2.5 and 2.6 show component locations and Power Module dimensions.
Please refer to these figures when installing or servicing the Power Module. Refer to
Appendix B for wiring diagrams of both the regenerative and non-regenerative
versions of the Power Module.
Table 2.1 – 1250A Configurations
Input Voltage (VAC) Output HP
460 700-750
575 750-900
660 700-1000