Converters, Requirements, continued – GE Industrial Solutions Galaxy Verification User Manual
Page 77
Galaxy Power System Verification Procedures
Issue 3 January 2008
Replacement Procedures 4 - 9
Requirements, continued
Converters
With the exception of a fan failure, converters are repaired by
replacement.The expected life of the converter fans at 25°C (77°F) is
approximately five years. The fans in the converters may be replaced in
the field.
Two approaches can be taken to fan maintenance. The first approach is
to replace the two fans on a routine basis every four to five years; this
ensures that the fans do not fail in the field under normal operating
conditions. This approach is appropriate when there are no remote alarm
facilities at the site. The second approach, assuming one has remote
alarm capability, is to wait until a fan fails. It can then be replaced. Since
it is likely that all the converters in that installation are of roughly the
same age, all converter fans at that site should be replaced at that time.
The approach used depends on the location and manning of the site as
well as the monitoring of alarms used at the site. The fan replacement
procedure is described in this section.
Note: As a routine procedure, keep fan assemblies dust-free.