80 Rockwell Automation Publication 20B-IN026C-EN-P - October 2015
Chapter 4 Converter Assembly Component Replacement Procedures
Converter Power Modules
(SCR)
See Chapter 1 - Component Diagrams and Torque Specifications on page 15 to
locate components in these instructions.
Remove Components
1. Read and follow the Safety Precautions on page 12 and Important Initial
Steps on page 13
.
2. Remove safety shields and enclosure covers as needed.
3. Remove the DC cable screws.
4. Locate the SCR modules to be replaced.
5. Remove the AC and DC Busbars and carefully set aside. See Busbar
Assembly (Converter Assembly) on page 35
.
6. Label and disconnect the wiring plugs from the SCR modules to be
replaced.
7. Remove the SCR module mounting screws (4).
8. Remove the SCR modules and properly discard them.
If any Converter SCR module fails, all three phases should be replaced (one
kit includes two Converter SCR modules for one phase).
DC+ Busbar
SCR Modules,
Upper (3)
AC Busbars
DC– Busbar
SCR Wiring to Precharge Board
(Red and White)
J2 to Upper SCRs
J3 to Lower SCRs
SCR Modules,
Lower (3)
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