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8-6
Routine Maintenance and Repair
590+ Series DC Digital Converter
5. Reverse the procedure for re-fitting.
Phase Assembly Replacement (Frame H)
Busbar
Phase Assembly
4Q
Busbar
Phase Assembly
Stack of
interconnecting
plates
2Q
A-
A+
A-
(upper phase assemblies only shown)
Trigger Board
Trigger Board
Thyristor
Dummy Board
Stack of
interconnecting
plates
Suppression
Board
(one only shown
for clarity)
(one only shown
for clarity)
(one only shown
for clarity)
(one only shown
for clarity)
Figure 8-3 Front View of Phase Assemblies
IMPORTANT:
When re-assembling the unit, apply a `zinc-loaded’ jointing compound between the
fuses and busbars, between the busbars and phase assemblies and between the
interconnection plates and the heatsink (BICC BX1 - SSD Part No. EA466241)
Observe all tightening torque levels, refer to Chapter 11: “Technical Specifications” -
Fixing Types and Torques.