ABB PQFS Installation, Operation And Maintenance Instructions page 89

Table 9 gives an overview of the possible filter conditions that can be associated
with any of the six digital outputs. When interpreting this table it should be noted
that:
The 'In standby' function refers to a state of the filter in which it is
o
connected to the power supply (i.e. main contactor closed) but the
IGBTs are not switching. As a result the filter will have virtually no
losses. This mode can be activated when the load requirement is lower
than a preset value (e.g. all loads switched off for a long time). For more
information on the 'In standby' function, refer to
The three programmable alarms and warnings have to be set up before
o
they can be used. This is explained in the next sections. If a
programmable alarm has been disabled, the digital output associated
with it will never be activated.
The default settings for the digital outputs are given in
disable the digital outputs, choose the option 'Disabled'.
For more information on cabling the digital output contacts refer to the
6.12.2 and 6.12.4.
In a master-master configuration, the digital inputs of all masters have to be
cabled in case full redundancy is required.
· Set up of the programmable alarms trip points
For setting up the programmable alarms go to [/Welcome/Settings/Customer
set./Alarms/Prog. Alarms]
For full redundancy with multi-master filters, these functions need to be set up in
each master unit of the filter system and the functions should be cabled
accordingly.
In addition to the alarm contact, which is triggered by any filter fault, three
programmable alarms can be defined. They can be associated with a digital
output (see preceding paragraph).
that can be associated with each programmable alarm.
Table 39: Overview of possible programmable alarm settings that can be associated with each
Alarm condition
Supply voltage (RMS) unacceptably high
Supply voltage (RMS) unacceptably low
One of the phases of the supply is missing
Network imbalance unacceptably high
Frequency variation unacceptably high
PQFS DC bus voltage unacceptably high for each
capacitor stack
PQFS internal preload error
PQFS over current fault
PQFS IGBT fault
PQFS over temperature fault
PQFS control board over temperature fault
Table 39 shows the possible alarm conditions
digital output
Setting for programmable alarm
Vrms_max
Vrms_min
Phase loss
Imbalance
Fq change
Vdc_max
Prel. Err.
Overcur.
IGBT fault
IGBT temp.
T ctrl max
Manual Power Quality Filter PQFS ç The PQF-Manager user interface 89
Section 7.7.3.2
Table 10. In order to
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