- incorrect setting of the parameters related to the connections and the equipment in the Setup Menu.
MANAGEMENT
The activation of the power factor overcorrection alarm will not affect the status of the inserted banks.
The relay outputs set as "ALA" and associated to the "HIcosphi" or "ALL" alarm will be activated unless parameter
P.25 – Alarm masking management (Chap. 7.6) has been set to mask the alarms under defined operating conditions.
DISPLAYING
Regardless of the current displaying, the alarm will be indicated
with the displaying of the relevant page of the Current alarm menu
that will be alternately shown with the numerical value
corresponding to the most capacitive extreme value of the target
cosphi range defined by parameters Cosphi setpoint and Cosphi
setpoint tolerance (0.99 capacitive in the example shown).
The Controller will stay in the above-mentioned screen until:
- key is pressed for more than 2sec (the alarm is anyway active);
- alarm is deactivated or manually reset by the operator.
Afterwards, the Measurement Menu will be automatically displayed and will show, respectively:
- the cosphi value and the alarm icon on the top left. The alarm will be anyway active in the Current Alarm Menu
(Chap. 8.5.1);
- the cosphi value, but not the alarm icon.
If, parameter P.25 – Alarm masking management (Chap. 7.6) has been set to mask the alarms under defined
operating conditions, the previous screen will be temporarily displayed for 3sec. The alarm will then automatically go back
to the first screen of the Measurement Menu by displaying the cosphi value, but not the alarm icon. The alarm will be
anyway present in the Current Alarm Menu.
STATISTICS
The alarm counter will be increased in the Statistics Menu (Chap. 8.4) at every occurrence.
DEACTIVATION
The alarm is automatically deactivated as soon as the cosphi value goes below the numerical value corresponding to
the most capacitive extreme value of the target cosphi range defined by parameters Cosphi setpoint Chap. 7.3.1 and
Cosphi setpoint tolerance Chap. 7.3.2.
RESET
Alarm can be manually reset from the Current Alarm Menu by pressing key (function possible only if P.13 –
Current alarm reset = “ON”, refer to Chap. 7.6).
8.5.2.9 Power factor correction failed alarm
ACTIVATION
The power factor correction failed alarm is activated if the cosphi value stays below the numerical value
corresponding to the most inductive extreme value of the target cosphi range defined by parameters Cosphi setpoint
Chap. 7.3.1 and Cosphi setpoint tolerance Chap. 7.3.2 for a time (in hours) equal to the value of parameter P.23 -
Power factor correction failed alarm delay (Chap. 7.6).
NOTE: the alarm condition may be caused by:
- incorrect sizing of the power factor correction equipment with respect to the system load;
- presence of degraded or broken batteries;
- incorrect setting of the parameters related to the power factor correction, the connections and the equipment in the
Setup Menu.
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