Lucent Technologies Galaxy Power System 4804AP H569-450
12 - 2 Maintenance and Replacement
Issue 1 June 2000
Requirements, continued
Rectifier Fan
Assembly
The expected life of the rectifier fans at 25°C (77°F) is approximately
eight years. The fans in the rectifiers may be replaced in the field.
Two approaches can be taken to fan maintenance.
• The first approach is to replace the fan on a routine basis every seven
to eight years; this ensures that the fan does 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 the fan fails. The rectifier will safely shut down and
issue both a fail alarm and a thermal alarm. The fan can then be
replaced. Since it is likely that all the rectifiers in that installation are
of roughly the same age, all rectifier 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. Refer to “Replacing a
Rectifier Fan Assembly” in this section.
