ABB
Chapter 8 - Changing Diodes and IGCTs in 7/9 MVA Phase Modules
ACS 6000 Maintenance Manual
3BHS202077 ZAB E01 Rev. C
8-7 (18)
6
Remove the top isolator disc from the stack to create more clearance
facilitating work on the diodes.
Figure 8-8
Removing Isolator Disc
7
Remove the fastening bolts of the uppper perforated busbar (see
circle in
Figure 8-9).
Figure 8-9
Removing Fastening Bolts of Perforated Busbar
8
Continue with section
8.4.2 if clamp diodes have to be replaced.
Continue with section
8.4.3 if NP diodes have to be replaced.