Standards Publication

Guide for the Measurement of Voltage, Current, Power, Energy, and Power Factor

NEMA C12.31G TR - 2024 | Status: Active | ID: 101038

This document establishes standard definitions for the measurement of AC, DC and AC+DC voltage, current, electrical power (active, reactive and apparent), AC electrical energy (active, reactive and apparent) and power factor in terms of sampled voltage and current measurements.  The definitions are provided to facilitate uniform comparison of the voltage, current, power, energy and power factor measurement values reported by electricity meters in comparison to equipment used as reference standards that implement these definitions for the determination of meter accuracy in the time domain and frequency domain. 

Published Date: January 31, 2024

Number of pages: 60

Staff Contact: Paul Orr

Download Standard

Terms & Conditions
To display, copy and/or download a copy of the document you have requested, NEMA's permission is subject to the following terms and conditions, which you must agree to by clicking on the "I Accept" button below:

  1. I agree not to alter the publication in any way and agree not to change its electronic format.
  2. I agree not to sell or offer for sale the publication for a price or any other consideration.
  3. I agree not to display the publication on a public website or distribute the publication from a public website.
  4. I acknowledge that the copyright to this document belongs to the National Electrical Manufacturers Association (NEMA), and that said copyright owner may revoke its permission or modify any of the foregoing terms and conditions at any time.
  5. I have read NEMA's  Privacy Policy and voluntarily consent to the collection, storage, and use of my personal data provided to NEMA as described in the Privacy Policy.

Keywords

METER, SMART METER, ELECTRIC UTILITY