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selected and the filter was powered down before or when new harmonic
components have been selected. The network identification may also be done
automatically during normal filter operation if the filter controller has noted a big
change of network impedance.
−
At the end of the start-up procedure, the filter will work as programmed.
Remark: Filter running at 100% load while RMS current rating is not attained.
Under exceptional conditions it is possible that the active filter is showing a 100% load
indication whereas its nominal RMS current rating is not yet attained. This is because
the filter has reached an operating limit other than the RMS current limit. Possible other
limits are:
−
Temperature limit due to a too high ambient temperature or a failing cooling
system.
−
Peak current limit due to an a-typical peak current requirement of the load.
−
Peak voltage limit due to an a-typical DC-link voltage requirement of the load or due
to a high network voltage.
Under all these conditions, the filter will run in limited mode and may not attain 100% of
its nominal current rating.
9.2.2
Stopping the filter with the PQF-Manager
In order to stop the filter with the PQF-Manager follow the instructions given below:
−
Press
displayed.
−
Highlight the filter 'start/stop' menu ('PQF' item in the list). In this menu, the 'STOP'
indication should be present.
−
Press
contactor will open.
−
The 'STOP' indication in the start/stop menu changes in a 'START' indication once
the filter is stopped.
Remarks:
−
If the 'start/stop' menu reads 'ACK. FAULT' (i.e. 'acknowledge fault'), the filter has
encountered a fault. Refer to
problem.
170 Operating instructions Manual Power Quality Filter PQFS
on the PQF-Manager repeatedly until the 'Welcome' screen is
. The filter will ask confirmation and then it will stop. The main
Section 9.7
and
Chapter 11
for troubleshooting the
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Table of Contents
Troubleshooting
