Manual Power Quality Filter PQFM Hardware description 23
Table 9: Filter conditions that can be related to the digital outputs
Manager setting for digital
output
(a)
Output relay closes when…
The auxiliary power is present in the main filter
enclosure and the main controller is communicating
with the PQF-Manager
The active filter is ‘on’ (IGBTs switching) or in
‘standby’ (main contactor closed but IGBTs not
switching)
The active filter is running under full load condition
The filter is ON or is in the startup procedure, or it is
stopped in fault condition but will restart as soon as
the fault has disappeared
The filter temperature limi
the filter is derating itself to run at a safe
temperature
The main active filter settings are activated
The auxiliary active filter settings are activated
One of the filter units in a multi
not available (e.g. due to a permanent error), or has
not yet been commissioned.
The programmable alarm 1 is activated
The programmable alarm 2 is activated
The programmable alarm 3 is activated
The programmable warning 1 is activated
The programmable warning 2 is activated
The programmable warning 3 is activated
Remarks:
(a)
: In order to set up this function, navigate to [/Welcome/Settings/Customer set./Digital Outputs]
(b)
: More information on the standby function is given in Section 7.9.3.1
(c)
: Different programmable warnings and alarms can be defined. More information on this subject is given
in Section 7.9.1.4.1
Further it should be noted that:
− Whenever a digital output is activated the corresponding icon on the PQF-
Manager display will change.
− In a master-master filter arrangement, only the master that has the control over
the complete system will activate its digital outputs. For full redundant
functionality, it is recommended to monitor the digital outputs of all the units in
the filter system.
The default set-up for the digital contacts is given in Table 10.
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