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Item Description
37
PCB EMC line
38
PCB output filter preload
39
Main power supply terminals (phases) (underneath controller boards)
40
Main power supply neutral connection (not mandatory) (underneath con-
troller boards)
41
Auxiliary transformer
42
Fuse preload circuit
3.4. The PQF main controller
The PQF main controller controls the complete active filter system. Its tasks include:
– Accepting and executing customer requests to stop and start the equipment.
– Calculating and generating IGBT-inverter control references based on the line current measurements and the user
requirements.
– Interface to the IGBT-inverters.
– Measurement of system voltages and currents for control, protection and presentation purposes.
Figure 17
depicts the controller interface diagram of the PQF active filter.
Direct Interface
Modbus & PQ-Link interface
Programmable Digital I/O
CT signals
(a)
CT signals to different units (master or slave) must be routed through daisy chain principle with return path.
If second unit is a slave unit, it will not have a PQF-Manager. If second unit is a master unit, it will have a
(b)
PQF-Manager.
When the filter consists of a master unit only, the customer has to:
STATUS
Approved
User interface
PQF
Manager
(a)
PQF
Manager
(b)
Figure 17: Controller interface diagram of the PQF active filter
SECURITY LEVEL
Public
CAN
PQF
Bus
main
controller
CAN bus (1)
CT's
PQF
main
controller
DOCUMENT ID
9AKK107045A4703
Q UICK STA RT-UP G UI DE
Circuit diagram designation
A002
A001
L1, L2, L3
N
T001
-
PQF
Power
First
Stage
unit
3∼ AC Out
PQF
Power
Second
Stage
3∼ AC Out
REV.
LANG.
PAGE
D
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14/41
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unit
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