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When a harmonic load is present, the filtering performance can be tested by selecting a harmonic, e.g. of order 11,
and verifying if it is filtered properly.
– For setting up the filter's main harmonics selection go to [/Welcome/Settings/Customer set./Main settings/Main
harmonics].
– For setting up the filter's auxiliary harmonics selection go to [/Welcome/Settings/Customer set./Auxiliary set-
tings/Aux. Harmonics].
For more information on the main and auxiliary settings concept and on the setting up of harmonics, refer to the de-
tailed manuals.
Once the harmonic is selected, analyze the spectrum of the line currents to see if the selected harmonic is filtered. If
the harmonic is not filtered properly (e.g. if it is amplified), deselect the harmonic and refer to Chapter 11 for trouble-
shooting 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 set-
tings/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 the detailed
Once the reactive power is selected, analyze the filter current. Refer to Chapter 11 in case of problems. Disable the
reactive power setting after the test if it is not required by the user.
5.9. Step 9: Set up the user requirements
After completing the previous steps, the user requirements for harmonic filtration and reactive power compensa-
tion/balancing can now 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. Following three modes are available:
• Mode 1 (order of preference for the filter's task: filtering to curve, max. filtering, reactive compensation and load
balancing)
• Mode 2 (order of preference for the filter's task: filtering to curve, reactive compensation and load balancing,
max. filtering)
• Mode 3 (order of preference for the filter's task: filtering to curve, reactive compensation and load balancing)
– Select the harmonics and the curve level.
– Select the reactive power and balancing settings.
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 respective PQF manuals for troubleshooting problems.
– Filter running at 100% load while RMS current rating is not attained.
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