Step 2: Record The Filter Operating Status; Step 3: Shut The Filter Down; Step 4: Inspect And Clean The Filter - ABB PQFS Installation, Operation And Maintenance Instructions

corresponds to the ambient conditions observed. If the ambient temperature is higher
than 40°C/104°F, the filter should be derated (Cf.
10.3.2

Step 2: Record the filter operating status

10.3.3

Step 3: Shut the filter down

10.3.4

Step 4: Inspect and clean the filter

142 Maintenance instructions ç Manual Power Quality Filter PQFS
· With the filter running, check and note the filter load graphs ([/Welcome/PQF
Monitoring/Filter load]). Pay special attention to the temperature graph. If this one
is around 100% and the other load indicators are relatively low, this could
indicate that the filter is limiting its output because it is experiencing a cooling
(fan) problem. If in doubt, assign the 'T Limit' indicator to a spare digital output
([/Welcome/Settings/Customer set./Digital Outputs]). This way, the digital output
monitor at the top of the PQF-Manager screen will be on if the filter is limiting its
output current due to temperature problems. By default, the 'T Limit' indicator is
assigned to digital output 6 of the PQF-Manager.
· Make a note of the PQF-operation hours ([/Welcome/PQF monitoring/PQF
operation]) and the fan-operation hours ([/Welcome/PQF Monitoring/Fan
operation]). For units up to 60A, if the fan operation indicator shows a multiple of
40000 hours, it is recommended that the fan be replaced. For units with higher
ratings than 60A, if the fan operation indicator shows a multiple of 35000 hours, it
is recommended that the fan be replaced
noise that could indicate fan failure.
· Browse the 'event logging' menu ([/Welcome/PQF monitoring/Event logging]) to
spot any abnormal events that may have occurred
· Make a note of the total number of faults that the system has recorded over time
([/Welcome/PQF monitoring/Number of errors])
· Inspect the filter visually for any condition that could indicate an abnormal filter
stress (e.g. abnormal noises, abnormal appearance/colour or components and
cables)
Note: In filters consisting of more than one master, the above parameters can be
reviewed for the different units.
· Switch the filter off and remove the power supply to the filter
· Wait at least 25 minutes to allow for the DC capacitors to discharge
· Remove the filter cover panel. Pay attention to the PQF-Manager connections.
· Open the auxiliary circuit fuse box
· Ensure that the DC capacitors have completely discharged before going to step 4
· Inspect the filter visually for any condition that could indicate an abnormal filter
stress (e.g. abnormal appearance/colour of components and wires)
· Remove all dust deposits in and around the filter. Pay special attention to the fan
and the heatsink. Indeed, the heatsink picks up dust from the cooling air and the
PQF might run into overtemperature faults if the heatsink is not cleaned regularly.
Pay special attention to this item if the filter has experienced shut downs due to
over temperature in the past.
· Ensure that no loose particles are left in the unit that could cause consequential
damage
Section 5.2)
(Cf. Section 10.4). Pay attention to any