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.
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