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Measuring and Analyzing Voltage Regulation

Category: ProVision, PMI Products, PQ Data Analysis, Using PMI Recorders, Power Quality

Learn how to easily measure and analyze voltage regulation using PMI's Guardian or Revolution recorder and ProVision software.


Utilities are generally required to ensure the delivered steady-state voltage is within the limits specified in ANSI C84.1. Persistent under- or over-voltage can result in customer complaints of frequent blown light bulbs, overheated motors, and equipment damage.


Generally speaking, ANSI C84.1 specifies limits of 5% above and 5% below the voltage nominal at the service entrance. For example, with a 120V nominal, these limits would be 126V and 114V, respectively.


Another standard of note is ITIC (formerly CBEMA) standard, intended to be a performance-oriented standard for electronics equipment manufacturers. ITIC specifies more lax limits of 10% above and below the nominal voltage in the case of steady-state voltages.


Whether voltage is within or outside of the specified limits of either standard, one challenge is relaying this information to the customer in a visual, comprehensible, and intuitive way. This paper will discuss how to do this using a Revolution or Guardian recorder, and PMI’s ProVision software to do just that.


This White Paper Includes:

  • Voltage Regulation Basics
  • The Problem
  • Recording
  • Analysis
  • Presentation
  • Simplification

Download White Paper Here