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Understanding RMS Measurements

Category: PQ Theory, PMI Products, Power Quality, Guardian

Understanding RMS Measurements

Learn methods for measuring voltage and current in an AC system by reading this popular PMI white paper.Understanding RMS Measurements


Power Monitors, Inc. provides a wide array of power quality test instrumentation.


These devices are used to measure line voltage, current and power from or to a number of different locations.


Users will note that on almost all occasions, when measuring voltage and current, the values are reported as the RMS (Root Mean Square) of the measured quantity.


This white paper will discuss what RMS is, why it is used and how it is calculated.


This White Paper Includes:

  • What is Root Mean Square (RMS)?
  • Why Use RMS?
  • RMS vs. Peak Values
  • RMS and Harmonics

Download White Paper Here