The Pqf Current Generator Hardware - ABB PQFS Installation, Operation And Maintenance Instructions

Up to 8 PQFS master panels can be connected in parallel providing full redundancy to the
customer. In addition to using master panels only, PQFS units can be connected in a
master-slave arrangement.
4.3

The PQF current generator hardware

The power circuit of a PQFS unit is represented hereafter.
The description of the main components is given in
Item
1
2
3
4
5
6
7
8
16 Hardware description  Manual Power Quality Filter PQFS
AC power supply
L
N
8
4
Output filter
1
Figure 10: Power circuit diagram of a PQFS active filter
Table 5: Main components of a PQFS active filter
Main components
IGBT inverter
DC bus capacitors
PWM reactor
Output filter
Preload resistor
Main contactor
Auxiliary fuses
Neutral cable connection (not mandatory)
L
N
7
5
6
Preload
resistor
3
2
IGBT
Inverter
Master Unit
Table 5.