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WARNING: If a function is assigned to a digital input, the same function must
never be assigned to the other digital input. Otherwise the filter may behave
erratically.
Table 27: Filter behavior as a function of the PQF-Manager settings for main/auxiliary switching
PQF-Manager setup for
digital input
Activ. Main
Activ. Aux.
Remark: Vlow = 0 Vdc, Vhigh = 15-24 Vdc
In order to obtain full redundancy with filters consisting of more than one master unit, the
digital inputs of all the units in a multi-master arrangement have to be set up and cabled
in the same way and the individual PQF-Managers have to be set up accordingly.
Once the cabling has been finished,
· The auxiliary fuse box may be closed
· The filter top cover may be replaced including the connection of the PQF-
Manager to the master unit
· The power to the filter may be restored
Refer to
Section 7.7.1.2
function required.
6.12.6
Implementation of local start/stop buttons
WARNING: If a function is assigned to a digital input, the same function must
never be assigned to the other digital input. Otherwise the filter may behave
erratically.
The PQFS active filter is equipped with a start/stop function integrated in the PQF-
Manager user interface. If the customer desires this however, he can add extra start/stop
buttons (not provided) to the filter system. The start and stop button has to be connected
to the PQF-Manager's digital inputs and the PQF-Manager has to be set up accordingly.
Note that in a multi-unit filter system in which more than one master system is present,
the digital inputs of all masters have to be set up and cabled in the same way to obtain
full redundancy.
Vlow applied to digital input
Auxiliary settings are used
Main settings are used
for guidelines on how to set up the digital inputs according to the
Manual Power Quality Filter PQFS ç Electrical design and installation 65
Vhigh applied to digital
input
Main settings are used
Auxiliary settings are used
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Troubleshooting
