PPA5xx/15xx user manual
9-3
9.1 Vector Display mode (PPA15xx only)
In this mode, the PPA presents a graphical vector
presentation of the magnitude and relative phase angle
between voltage and current components of any phase,
plus the relationship of voltage and current of different
phases.
This is a useful presentation for users wishing to see
nominal vector relationships or to observe relative change
with an analogue style display. Since applications in which
the PPA series power analyzers are used often involve very
small but important changes in phase angle, for example,
a low power factor transformer, users will experience
measurement values or changes that cannot be resolved
with a vector display or seen with a human eye. For this
reason, the PPA vector display is always supported by a
corresponding numeric presentation, where measured
values that are impossible to observe on a vector can be
precisely quantified.
It should be noted that for the purpose of ensuring an
optimum graphical resolution with any measured value,
voltage and current vector magnitudes are automatically
auto scaled to 100% and 80% respectively.
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