156 Commissioning instructions Manual Power Quality Filter PQFS
− For setting up the filter’s auxiliary harmonics selection go to
[/Welcome/Settings/Customer set./Auxiliary settings/Aux. Harmonics].
For more information on the main and auxiliary settings concept and on the setting up
of harmonics, refer to Section 7.9.1.1.
Once the harmonic is selected, analyze the spectrum of the line currents to see if the
selected harmonic is filtered. Refer to Section 7.8.2 for more information on displaying
measurement results. If the harmonic is not filtered properly (e.g. if it is amplified),
deselect the harmonic and refer to Chapter 11 for troubleshooting the problem.
When harmonic load is not present, the filter can be tested by generating static reactive
power. Initially a low value can be set which can then be gradually increased to the
nominal filter rating.
− For setting up the filter’s main reactive power feature go to
[/Welcome/Settings/Customer set./Main settings/Main PFC/Bal.].
− For setting up the filter’s auxiliary harmonics selection go to
[/Welcome/Settings/Customer set./Auxiliary settings/Aux. PFC/Bal.].
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 Section 7.9.1.1.
Once the reactive power is selected, analyze the filter current. Refer to Section 7.8.2 for
more information on displaying measurement results. Refer to Chapter 11 in case of
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.
− Select the desired filter mode.
− Select the harmonics and the curve level.
− Select the reactive power and balancing settings.
Background information on all the items discussed above is given in Section 7.9.1.1.
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:
− Refer to Chapter 11 for troubleshooting problems.
− Filter running at 100% load while RMS current rating is not attained.
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