16
P.28
- Selecting mode of steps insertion.
Standard mode -
Normal operation with free selection of the steps
Linear mode -
the steps are connected in progression from left towards right only following the step number and according to
the LIFO (Last In First Out) logic. The controller will not connect a step when the system steps are of different ratings and by
connecting the next step, the set-point value would be exceeded.
P.29
- Setpoint used when the system is generating active power to the supplier (with negative active power / power factor ).
P.30
- Disconnection sensitivity. Same as the previous parameter but related to disconnection. If set to OFF the disconnection has the
same reaction time of connection set with the previous parameter.
P.31 -
If set to ON, when switching from AUT mode to MAN mode, steps are disconnected in sequence.
P.32 –
Trip threshold for the capacitors overload protection (alarm A08), that will arise after a integral delay time, inversely proportional
to the value of the overload.
Note:
You can use this protection only if the capacitors are not equipped with filtering devices such as inductors or similar.
P.33 -
Threshold beyond which the integral delay for tripping of the overload alarm is zeroed, causing the immediate intervention of the
A08
alarm.
P.34 – P.35 –
Data of VTs eventually used in the wiring diagrams.
P.36
– Unit of measure for temperature.
P.37 – P.38 -
Start and stop temperature for the cooling fan of the panel, expressed in the unit set by P.36. The cooling fan is started
when the temperature is >= to P.37 and it is stopped when it is < than P.38.
P.39 -
Threshold for generation of alarm
A08 Panel temperature too high
.
P.40
- Percentage threshold of the residual power of the steps, compared with the original power programmed in general menu. Below
this threshold the alarm
A10 step failure
is generated.
P.41
- Maximum voltage alarm threshold, referred to the rated voltage set with P.07, beyond which the alarm
A06 Voltage too high
is
generated.
P.42
- Undervoltage alarm threshold, referred to the rated voltage set with P.07, below which the alarm
A05 voltage too low
is
generated.
P.43
- Maximum plant voltage THD alarm threshold, beyond which the alarm
A10 THDV too high
is generated.
P.44
– Maximum plant current THD alarm threshold beyond which the alarm
A05 voltage too low
is generated.
P.45
– Maintenace interval in hours. When it is elapsed, the alarm
A12 maintenance interval
will be generated. The hour count
increments as long as the device is powered.
P.46
– Function of the semi-circular bar-graph.
Kvar ins/tot:
The bar graph represents the amount of kvar actually inserted, with reference to the total reactive power installed
in the panel.
Curr act/nom
: Percentage of actual plant current with reference to the maximum current of the CT.
Delta kvar:
bar graph with central zero. It represts the positive/negative delta-kvar needed to reach the setpoint, compared to
the total kvar installed.
P.47
– Default measure shown on the secondary display. Setting the parameter to ROT, the different measures will be shown with a
sequential rotation.
P.48
– If set to ON, the display backlight flashes in presence of one or more active alarms.
P.49
– Serial (node) address of the communication protocol.
P.50
– Communication port transmission speed.
P.51
– Data format. 7 bit settings can only be used for ASCII protocol.
P.52
– Stop bit number.
P.53
– Select communication protocol.
