Standard Maintenance Procedure - ABB PQFS Installation, Operation And Maintenance Instructions

LV Active Filters PQF
Servicing report

10.8.2 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 panel
•
Rating factor (temperature > 40°C/104°F or altitude > 1000m/3300ft)
o
Rating (%)
Filter operating status record (filter running)
•
Filter load graphs
o
Vdc load (%)
o
Ipeak load (%)
o
Irms load (%)
o
Temp (%)
•
Filter running in derated mode due to temperature limitation?
o
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)
If answer if 'Y' to any of the two questions above, check filter cooling.
•
PQF operation hours
•
Fan operation hours
o
If fan operation hours are multiple of 40000 hrs for units up to 60A and of
35000 hrs / 27000 hrs for units with higher ratings, exchange fan.
•
Event logging window
o
Abnormal events present? (Y/N)
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 for 25 minutes for DC capacitors to discharge
Remove the filter protective cover (right hand side) and open the auxiliary fuse box
•
Ensure that components do not carry dangerous voltage levels anymore.
Inspect and clean the filter
Project:
Issued by:
Date:
Manual Power Quality Filter PQFS  Maintenance instructions 183
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