ABB PQFM Instruction Manual page 115

Figure 83 illustrates the principle of filtering to curve for one particular harmonic order.
The flexibility of the PQF control is such that a specific curve level may be defined for
each selected harmonic.
The default filter mode is Mode 3.
7.9.1.1.2 Selecting the harmonics with setting of curve levels
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 settings/Aux. harmonics]
The harmonics that can be selected are presented in a table such as presented in
46.
When the PQF is operating in 4-W mode, 15 harmonics can be selected.
When the PQF is operating in 3-W mode, 20 harmonics can be selected.
Before filtering
Supply
current for
harmonic
order n
Permitted
residual level
into the supply
= curve setting
Figure 83: Filtering to curve for harmonic order n
Manual Power Quality Filter PQFM ç The PQF-Manager user interface 115
After filtering
Filtered current
Remaining
supply
current
Table