ABB PQFM Instruction Manual page 114

(a) Refer to detailed manuals for cabling instructions for this feature. Refer to
configuring the digital input for this feature. The external input must be provided to the PQF-
Manager which acts like the "master" unit.
7.9.1.1.1 Setting up the filter mode
For setting up the filter's main filter mode go to [/Welcome/Settings/Customer
set./Main settings/Filter mode].
For setting up the filter's auxiliary filter mode go to [/Welcome/Settings/Customer
set./Auxiliary settings/Filter mode].
The filter can have three types of effect on the network:
- Filter the selected harmonics until their magnitudes are close to zero (Maximum
Filtering)
- Filter the selected harmonics until their magnitudes reach the residual level
permitted by the user (Filtering to Curve)
- Produce or absorb reactive power including load balancing
The user can put the emphasis on one of the above effects by selecting the filtering
mode. Table 45
Highest priority level
Mode 1 Filtering to curve
Mode 2 Filtering to curve
Mode 3 Filtering to curve
In Mode 1, the filter will first filter to the pre-programmed curve. Once the requirements
are fulfilled, the remaining resources will be allocated to reducing the selected
harmonics as close as possible to zero. If further resources are then available, reactive
power compensation and load balancing will be performed as required.
In Mode 2, the second priority after filtering to the curve is reactive power compensation
and load balancing. Maximum filtering comes in third place and will be done if both the
curve specification and the reactive power requirements including balancing are fulfilled.
In Mode 3, the filter will first ensure that the harmonic curve specification is fulfilled. If
then there are still resources available, the filter will do reactive power compensation
and load balancing if requested by the user.
114 The PQF-Manager user interface ç Manual Power Quality Filter PQFM
shows the three available modes:
Table 45: Available filter modes
Maximum filtering
Reactive compensation
Reactive compensation
Section 7.9.1.4
Lowest priority level
Reactive compensation
Maximum filtering
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