What the Eagle™ Records
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Flicker
The flicker record type is designed to show voltage variations that
cause lights to flicker. The Eagle defaults to the threshold of
irritation curve from IEEE Standard 141. This curve is designed to
show only voltage flicker that is perceived as irritating. When this
occurs, a flicker event is recorded with the flicker time and
magnitude.
Trigger Logic
A flicker curve is specified by a list of allowable voltage thresholds,
and a limit on their quantity in certain time spans. The default
parameters conform to IEEE Standard 141 and can be adjusted in
ProVision. For more information on flicker parameters, see the
ProVision documentation.
Figure 21 – Flicker Report
Flicker is computed once per second, based on the previous
second’s one cycle maximum, minimum, and one-second average
RMS voltage levels. The thresholds are given as a percentage. If
the maximum, minimum, or average differs from each other by
more than the percentage for a certain time period, then a flicker
event counter is incremented. If the counter value exceeds the
limit for a certain time period, a flicker record is triggered.
