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Modular evaluation of Active electrical energy meters 




Active electrical energy meters may be constructed from separate parts, such as a measuring and calculating part, an indicating part and a (communication) module. Those parts may be produced by different Original Equipment Manufacturers (OEMs), in this document referred to as “producers”.
This document provides guidance on the evaluation of the above mentioned parts of an active electrical energy meter.

This WELMEC guide 11.x is used in combination with

  • WELMEC guide 8.8, which provides guidance on the general and administrative aspects of the voluntary system of modular evaluation of a measuring instrument.
  • WELMEC guide 7.2, which provides guidance on software requirements and validation


Other references:

  • EN 50470-1 “Electricity metering equipment (a.c.) – Part 1: General require-ments, tests and test conditions – Metering equipment (class indexes A, B and C)”
  • EN 50470-3 “Electricity metering equipment (a.c.) – Part 3: Particular require-ments – Static meters for active energy (class indexes A, B and C)”
  • EN 61000-4-19 “Electromagnetic compatibility (EMC) – Part 4-19: Testing and measurement techniques – Test for immunity to conducted, differential mode dis-turbances and signaling in the frequency range 2 kHz to 150 kHz at a.c. power ports”
  • TR 50579 “Electricity metering equipment (a.c.) - Severity levels, immunity re-quirements and test methods for conducted disturbances in the frequency range 2 kHz - 150 kHz”

AUTHORED BY: Working Group 11

Unless otherwise stated, the English version of each publication should be taken as the official version.

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