42
8.4 Manual control
CAUTION!
Switching in capacitor stages manually can result in overcorrection of the sys-
tem. This can cause other problems, such as resonance-induced overvoltage in
the supply network and/or damage to the capacitor stages.
The supply network from which the capacitor stages controlled by the PQC are
operated must be monitored for resonant conditions and overvoltage whenever
stages are switched in manually.
This measure will avoid damage to the capacitor stages or to loads connected
to the supply network concerned.
When
Manual control
is selected in the main menu, the following submenu appears.
∆Q power
Corrective power still lacking to achieve target cos
φ
– Capacitive corrective power lacking is shown as positive.
– Inductive corrective power lacking is shown as negative.
Available Q power
Corrective power still available for switching in
Figure 35 Manual control
Key
Action
–
Select
Select
Set / Select
–
Manual Control:
·
When this function is enabled, selecting
Continue
then displays the
Stages
submenu.
Switch out stages:
·
This function switches all switched-in capacitor stages out again.
Figure 36 Manual control enabled
Figure 37 Manual control:
Switch out stages
