Data Sheet

Flicker
The Flicker section shows the effects of large fluctuating loads.
The standard flicker variables PST (short term, 10 minute value) and PLT (long term, 120
minute value) are graphed.
Flicker is a statistical measurement relating to the effect of fluctuating loads on lighting and
other sensitive equipment.
The typical sources of flicker are steel mills using large electric motors or arc furnaces on a
distribution network, or frequent starting of an elevator motor in an office building, or if a rural
residence has a large water pump starting regularly on a long feeder system.
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1/6/2011