ICAR PQS
rev8 may18
32 / 86
phase-to-phase voltages
phase-to-neutral voltages
currents
For each of these measurements, there is a display page that graphically represents the harmonic content (spectrum) through a
bar graph.
Every column is related to one harmonic order, even and odd. The first column shows the total harmonic distortion (THD).
Every histogram bar is then divided into three parts, one each phase L1,L2, L3.
The value of the harmonic content is expressed as a percentage with respect to the fundamental (system frequency).
It is possible to show the harmonic content in numeric format, selecting the required order through ◄and ►. The lower part of
the screen will display a little arrow that points to the selected column, and the relative percentage value of the three phases.
The vertical scale of the graph is automatically selected among four full-scale values, depending on the column with the highest
value.
10
WAVEFORM PAGE
This page graphically views the waveform of the voltage and current signals read by the power factor controller.
It is possible to see one phase at a time, selecting it with ◄ and ► key.
The vertical scale (amplitude) is automatically scaled in order to fit the waveform on the screen in the best possible way.
The horizontal axis (time) shows two consecutive periods referred to the fundamental frequency.
The graph is automatically updated about every 1s.
11
EXPANDABILITY
Thanks to expansion bus, the 8BGA power factor controller can be expanded with the modules (see table 1).
It is possible to connect a maximum of 4 modules at the same time.
The supported modules can be grouped in the following categories:
additional steps
communication modules
digital I/O modules
Analog I/O modules.
To insert an expansion module:
1.
remove the power supply to power factor relay
2.
remove the protecting cover of one of the expansion slots
3.
insert the upper hook of the module into the fixing hole on the top of the expansion slot
4.
rotate down the module body, inserting the connector on the bus
5.
push until the bottom clip snaps into its housing.
Numeric values
of the selected
order
