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Understanding IEEE Flicker, IFL, Pst, Plt

Category: PMI Products, Guardian, IEEE Standards, Eagle

This white paper covers and explains three of IEEE’s most common Flicker definitions: IFL, Pst and Plt. The GE Flicker Curve and how other measurements standards compare to the GE Flicker Curve will be covered briefly; for more information on the GE Flicker curve please refer to the whitepaper “Application of the GE Flicker Curve.” The focus of this paper is to provide a better understanding of IEC 61000-4-15 and how IFL, Pst and Plt are derived.


This white paper includes:

  • Flicker's definition
  • The cause of flicker
  • Standards of defining flicker
  • Flickermeter measurements
  • Functions of the IEEE 1453 flickermeter
  • Flickermeter definitions and equations
  • Finding the source of flicker

Download White Paper Here