Installation, Operation and Technical Manual Rectifier Technologies
158-1872-01 77 19-Feb-14
The purpose of a filter is to remove dust from the air but as they become dustier less air
flows into the rectifier and eventually overheating of the rectifier can occur. The rectifiers
will protect themselves in the event of overheating, and an alarm will be generated
accordingly. However even a partly blocked fan filter is undesirable because the rectifiers
will suffer reduced air flow and will run hotter and have a reduction in their lifetime as a
consequence.
To avoid creating a lot of dust in the vicinity of the power plant it is advisable to clean the
filters outside in the open air. It is a better idea to have spare clean filters to replace the
dusty ones with, then remove the dirty filters to be cleaned at a convenient time and
location using appropriate aids.
For dusty environments frequent cleaning is required. Even in ‘clean’ environments a
surprising amount of dust can appear. To determine the frequency of cleaning the site
should be monitored for dust build-up.
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