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LV Active Filters PQF
Servicing report
10.7.2
Standard maintenance procedure
Ambient conditions and derating condition (filter running)
·
Check the ambient temperature (< 40°C/104°F) (if > 40°C/104°F, derating is required)
·
Check the installation altitude (< 1000m/3300ft) (if > 1000m/3300ft, derating is required)
·
Check the ventilation (room and enclosure)
·
Ensure that no conductive dust is present in and around the filter enclosure
·
Rating factor (temperature > 40°C/104°F or altitude > 1000m/3300ft)
Rating (%)
o
Filter operating status record (filter running)
·
Filter load graphs
Vdc load (%)
o
Ipeak load (%)
o
Irms load (%)
o
Temp (%)
o
·
Filter running in derated mode due to temperature limitation?
Temp-load around 100% and other load indicators low? (Y/N)
o
'T-Limit' indicator on digital output monitor on? (digital output 6 by default) (Y/N)
o
If answer if 'Y' to any of the two questions above, check filter cooling.
·
PQF operation hours
·
Fan operation hours
·
If fan operation hours are multiple
higher ratings, exchange fan.
·
Event logging window
Abnormal events present? (Y/N)
o
If 'Y', describe them in the 'comments' section of this report.
·
Total number of faults recorded by the system
Describe them in the 'comments' section of this report.
Shut down the filter, remove supply to the unit
Wait 25 minutes for DC capacitors to discharge
Remove the filter protective cover and open the auxiliary fuse box
·
Ensure that components do not carry dangerous voltage levels anymore.
Inspect and clean the filter
·
All components/cabling looks OK? (Y/N)
IF 'N', describe the problems in the 'comments' section of this report.
·
Remove all dust deposits in and around the filter (fans, heatsinks, control board, ...)
·
Remove loose components if present in enclosure
Project:
Issued by:
Date:
of 40000 hrs for units up to 60A and of 35000 hrs for units with
Manual Power Quality Filter PQFM ç Maintenance instructions 147
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Troubleshooting
