Customizing the GE Flicker Curve

Understand the necessary steps to change the default flicker curve settings and learn how to identify situations in which this may be vital.

Flicker is still one of the top PQ complaints reported to utilities, therefore it is important to be able to effectively quantify and evaluate these types of problems.

In many situations it can be beneficial to customize the licker curve to meet the needs of the individual situation or to existing “house” standards already developed and in use by the utility.

The flicker monitor available on PMI recorders has settings that allow the default IEEE Standard 141 (GE Flicker curve) to be customized based on user-specified settings.

Flicker can be defined as the visible fluctuation in light intensity due to variations in the supply voltage.

This definition has two main parts where the change in the voltage, over a given period of time, cause variations in light intensity that are perceivable from the standpoint of the observer.

Although the definition of flicker is driven by a perceived light change, the method of measuring this problem is a calculation based on supply voltage variation, given a known relationship between voltage changes and incandescent light output...

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