Step 9: Set Up The User Requirements - ABB PQFS Installation, Operation And Maintenance Instructions

Set the 'PFC Type' item to 'Static cap.' and choose the desired value for the item 'Q
static'.
For more information on the main and auxiliary settings concept, refer to
Once the reactive power is selected, analyze the filter current. Refer to
more information on displaying measurement results. Refer to to
problems. Disable the reactive power setting after the test if it is not required by the user.

8.10 Step 9: Set up the user requirements

If everything goes well at this stage, the user requirements for harmonic filtration and
reactive power compensation/balancing can be set up. Both main and auxiliary settings
can be programmed if desired.
By default the filter is set up to take into consideration the main settings only.
Background information on all the items discussed above is given in
At this stage, verify the functioning of the settings made for the digital I/O if possible (e.g.
remote control, local start/stop buttons).
Remarks:
· Select the desired filter mode
· Select the harmonics and the curve level
· Select the reactive power and balancing settings
· Refer to to
Chapter 11
· Filter running at 100% load while RMS current rating is not attained
Under exceptional conditions it is possible that the active filter is showing a 100%
load indication whereas its nominal RMS current rating is not yet attained. This is
because the filter has reached an operating limit other than the RMS current
limit. Possible other limits are:
Temperature limit due to a too high ambient temperature or a failing
o
cooling system
Peak current limit due to an a-typical peak current requirement of the
o
load
Peak voltage limit due to an a-typical DC-link voltage requirement of the
o
load or due to a high network voltage
Under all these conditions, the filter will run in limited mode and may not attain
100% of its nominal current rating.
· Harmonics put in 'standby' by the filter system:
When selecting a harmonic that has not been selected before, the filter will
identify the network characteristics for this harmonic. After this process, the filter
will launch the filtering process for the component considered. If during the
network identification process for a given harmonic a special (problematic)
condition is encountered, the system puts the component in 'standby'. In that
case the harmonic selected is not filtered for the time being. Special network
conditions include extremely high impedance of the supply network or extremely
low impedance towards the load. When consulting the harmonic selection table
of the PQF-Manager, harmonics put in 'standby' can be recognized by the label
'S' that is displayed in the harmonic selection column (which reads otherwise
for troubleshooting problems
Manual Power Quality Filter PQFS ç Commissioning instructions 123
Section 7.7.1.1.
Section 7.6.2 for
Chapter 11 in case of
Section 7.7.1.1.