50
8.5.2.4 Switching delay
The switching delay, i.e. the time between one switching action and the next for the same
capacitor stage, can be set between the values of 5 and 500 seconds in 5-second increments.
When a stage is to be switched in or out, the PQC waits for this switching delay to elapse before
switching takes place. If more stages are required, the switching time delay is shortened in
accordance with the number of stages concerned:
e.g. 2 stages required = switching delay time / 2, or 3 stages required = switching delay time / 3.
In order to keep the wear of the contacts to a minimum, the switching delay time should be set
to less than 45 seconds only in exceptional cases. The discharge time, which ensures that the
capacitors are fully discharged before they are switched on again, takes precedence over, i.e.
overrides, the switching delay.
8.5.2.5 Selecting the control phase
The control profiles menu also includes the
Phase
setting. This is used to select the phase used
by the PQC for control purposes (can only be edited on 3-phase PQCs).
Any one of the three phases L1, L2 and L3 may be selected (with single-phase PQCs, the phase
L1 is a fixed setting).
On the PQC overview screen, the phase marked with an asterisk * on its left is the one selected
for the PQC to use for control purposes.
Note: with single-phase PQCs, the connected phase is always the one used for control purpo-
ses.
Figure 51 Phase L1 is the control phase
8.5.3 General settings
Selecting
Settings
in the main menu enables the
General
menu to be displayed. The following
submenus can then be selected:
Capacitor stages
·
Cyclic switching, discharge time, fixed capacitor stages,
choke factor, zero stage limit, nominal voltage
Set limits
·
Settings for the limits of parameters
Alarm management
·
Alarm relay, PQC trip and display alarms
Extensions
·
A submenu is provided for every optional Extension.
Key
Action
Back to Settings
Select
Select
Open submenu
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