Rockwell Automation 1395 Digital DC Drive User Manual
Page 31
Publication 2361-5.01 July 1998
Chapter
2
Your 1250A DC Drive
Contents
This chapter is designed to help you understand the construction of
your 1250A Bulletin 1395 DC drive. The following topics will be
covered in this chapter:
Introduction
Your 1250A DC drive functions with the following features:
•
The 1250A drive 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 and are cooled by the bridge fan.
•
The 1250A drive is protected from incoming fault currents with a
circuit breaker. The components of your drive (the armature
bridge, field bridge, and control components) are protected with
fuses, MOVs, snubbers, and/or chokes.
•
The 1250A drive is constructed and housed in three bays, the first
bay containing the AC input and control hardware, the second
bay containing the armature bridge hardware, and the third bay
containing the DC output hardware.
•
The 1250A drive has an optional top-hat extension available for
the AC input bay.
•
The 1250A drive can be built with an optional through bus
assembly, allowing the 1250A drive and other connected drives
to tap off from the same AC input.
Topic
Page
Introduction
Drive Layout
2-2
Drive Schematics
2-3
Symbol Reference Chart
2-6
Drive Structure
2-8
Conclusion
2-8
Input Voltage (V AC)
Nominal Output HP
460
700-750
575
750-900
660
750-1000