SATEC PAS - Manual (Page 22)

V I E W I N G L O G F I L E S
20
Viewing Phasor Diagrams
Waveform views have an additional pane at the lower right, where PAS draws
phasor diagrams for displayed waveforms. The phasor diagrams show you the
relative magnitude and angle of the fundamental harmonic for the selected voltage
and current channels. All angles are taken relative to the reference voltage channel.
To change the reference channel, click with the right mouse button on the
waveform window, select 'Options...', click on the 'Phasor' tab, check the channel
you want to make a reference channel, and then click 'OK'. If you leave the
'Triangle' box checked, PAS will connect the ends of the voltage and current
vectors by lines showing you tree-phase voltage and current triangles. This may be
useful when analyzing voltage and current unbalances.
Phasor diagrams are calculated for one waveform cycle pointed to by the left
marker line. As you move the marker, the phasor diagrams are updated reflecting
the new marker position.
Viewing Symmetrical Components
Waveform views have an additional pane at the right where PAS can display the
symmetrical components for voltages and currents, which are calculated for the
point indicated by the left marker line. To enable or disable the symmetrical
components, click with the right mouse button on the waveform window, select
'Options...', check or uncheck the symmetrical components on the 'Channels' tab,
and then click 'OK'.
Selecting Primary and Secondary Units
Voltages and currents can be displayed in primary (default) or secondary units. To
select primary or secondary units for your waveforms, click with the right mouse
button on the waveform window, select 'Options...', select the desired units for
voltages and currents on the 'Channels' tab, and then click 'OK'.
ASCII waveform files logged by previous releases of PAS do not contain
information on the secondary voltage or current set in the waveform
recorder. These waveforms will always shown in primary units.
Note