EN 50470-3:2022/prA1:2026

• Abstract:

  Particular requirements for static meters intended for residential, commercial and light industrial use, of class indexes A, B and C, for the measurement of alternating current electrical active energy in 50 Hz networks. It specifies performance requirements and type test methods.

• Status: Not Published
• Publication Date: 11-Nov-2026
• ICS: 91.140.50 - Electricity supply systems
• Technical Committee: CLC/TC 13 - Equipment for electrical energy measurement and load control
• Drafting Committee: CLC/TC 13/WG 01 - Electricity meters for active energy of class a, b and c
• Current Stage: 4020 - Enquiry circulated - Enquiry
• Start Date: 17-Jul-2026
• Due Date: 25-Jun-2025
• Completion Date: 17-Jul-2026
• Directive: Harmonized Standard2014/32/EU - Directive 2014/32/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of measuring instruments
• Mandate: M/541 - [C(2015)8558] Standardization request in support of the implementation of Directive 2014/32/EU on measuring instruments
• Ref Project: SIST EN 50470-3:2022/oprA1:2026 - Electricity metering equipment - Part 3: Particular requirements - Static meters for AC active energy (class indexes A, B and C)

• Amends: EN 50470-3:2022 - Electricity metering equipment - Part 3: Particular requirements - Static meters for AC active energy (class indexes A, B and C)
• Effective Date: 07-May-2024

Overview

EN 50470-3:2022/prA1:2026 is a proposed amendment to the European standard for electricity metering equipment, specifically addressing static meters for alternating current (AC) active energy measurement in 50 Hz networks. Developed by the European Committee for Electrotechnical Standardization (CENELEC), this draft amendment focuses on particular requirements for meters intended for residential, commercial, and light industrial applications, covering accuracy class indexes A, B, and C.

The amendment refines technical and testing requirements to ensure reliable accuracy and performance for static electricity meters. This document aligns with the essential requirements of Directive 2014/32/EU (Measuring Instruments Directive), and introduces updates related to immune performance against electrical disturbances.

Key Topics

• Scope and Purpose

  • Applies to static AC meters for measuring active energy in 50 Hz grids.
  • Covers residential, commercial, and light industrial meter installations (class A, B, C).
  • Focuses on type testing to validate performance under prescribed environmental and electrical conditions.

• Performance and Accuracy

  • Enhanced requirements for meter accuracy under various disturbances (e.g., harmonics, magnetic and climatic conditions).
  • Table updates for limits of percentage error for each accuracy class under specific test scenarios.

• Construction and Indications

  • Mandates that all measurement indications be clearly legible under typical conditions.
  • Requires clear marking and instruction for users to interpret results accurately.

• Immunity and Reliability

  • Addition of new test waveforms to assess meter immunity against severe current transients.
  • Criteria for demonstrating reliability, including laboratory tests, predictive calculations, and field test data.

• Software and Data Protection

  • Detailed requirements for software identification, security, and protection from corruption.
  • Documentation and test method verification for conformance.

• Climatic Adaptability

  • Clarity on specification and marking of operating temperature limits.
  • Defined test requirements for operation under temperature extremes and humidity.

Applications

EN 50470-3:2022/prA1:2026 is essential for manufacturers and users of static electricity meters in:

• Residential energy metering: Ensures accurate billing and monitoring for households.
• Commercial electricity usage: Supports precise energy measurement in offices, shops, and small businesses.
• Light industrial facilities: Provides reliable monitoring for small-scale industrial environments.
• Grid modernization projects: Aligns with smart grid, advanced metering infrastructure (AMI), and digital transformation goals.
• National regulatory compliance: Forms the basis for conformity assessment under EU Directives concerning measuring instruments.

Related Standards

This standard links and refers to several other key documents, providing harmonization within the metering and measurement sector:

• EN IEC 62052-11:2021/prAC:2026: Test methods for electricity metering equipment.
• EN IEC 62052-31:2024: General safety requirements for electricity meters.
• EN 61869 series: Instrument transformers, particularly regarding meters used with low power instrument transformers (LPITs).
• EN 50470-1: General requirements for electricity metering equipment.
• Directive 2014/32/EU (MID): European Union legal framework for measuring instruments.

Summary

EN 50470-3:2022/prA1:2026 reinforces the performance, reliability, and regulatory compliance of AC static electricity meters in European markets. Its adoption supports manufacturers, utilities, and regulators by ensuring that meters operate correctly and consistently under a wide range of practical conditions. Organizations engaged in the design, installation, and verification of electricity metering equipment should reference this amended standard to maintain accuracy, durability, and data integrity across energy management systems.

SLOVENSKI STANDARD
01-september-2026
Oprema za merjenje električne energije - 3. del: Posebne zahteve - Statični števci
za izmenično delovno energijo (razredni indeksi A, B in C) - Dopolnilo A1
Electricity metering equipment - Part 3: Particular requirements - Static meters for AC
active energy (class indexes A, B and C)
Elektrizitätszähler - Teil 3: Besondere Anforderungen - Elektronische Wechselstrom
Wirkverbrauchszähler der Genauigkeitsklassen A, B und C
Equipement de comptage d'électricité - Partie 3: Exigences particulières - Compteurs
statiques d'énergie active en courant alternatif (indices de classe A, B et C)
Ta slovenski standard je istoveten z: EN 50470-3:2022/prA1:2026
ICS:
17.220.20 Merjenje električnih in Measurement of electrical
magnetnih veličin and magnetic quantities
91.140.50 Sistemi za oskrbo z elektriko Electricity supply systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD DRAFT
EN 50470-3:2022
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
July 2026
ICS 91.140.50 -
English Version
Electricity metering equipment - Part 3: Particular requirements -
Static meters for AC active energy (class indexes A, B and C)
Equipement de comptage d'électricité - Partie 3: Exigences Elektrizitätszähler - Teil 3: Besondere Anforderungen -
particulières - Compteurs statiques d'énergie active en Elektronische Wechselstrom Wirkverbrauchszähler der
courant alternatif (indices de classe A, B et C) Genauigkeitsklassen A, B und C
This draft amendment prA1, if approved, will modify the European Standard EN 50470-3:2022; it is submitted to CENELEC members for
enquiry.
Deadline for CENELEC: 2026-10-09.

It has been drawn up by CLC/TC 13.

If this draft becomes an amendment, CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this amendment the status of a national standard without any alteration.

This draft amendment was established by CENELEC in three official versions (English, French, German).
A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to
the CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 79961 Ref. No. EN 50470-3:2022/prA1:2026 E

Contents Page
European foreword . 3
Introduction . 4
1 Modifications to Clause 1, “Scope” . 4
2 Modifications to Clause 2, “Normative references” . 4
3 Modifications to Clause 5, “Constructions requirements” . 4
4 Modifications to Clause 7, “Accuracy requirements” . 5
5 Modifications to Clause 8, “Climatic conditions” . 7
6 Modifications to Clause 10, “Requirements concerning the software and protection against
corruption” . 7
7 Modifications to Clause 12, “Durability” . 7
8 Modifications to Clause 13, “Reliability” . 8
9 Modifications to Annex ZZ, “Relationship between this European Standard and the
essential requirements of Directive 2014/32/EU aimed to be covered” . 8
10 Modifications to Bibliography . 8
European foreword
This document (EN 50470-3:2022/prA1:2026) has been prepared by CLC/TC 13 “Electrical energy
measurement and control”.
This document is currently submitted to the Enquiry.
The following dates are proposed:
• latest date by which the existence of this (doa) dav + 6 months
document has to be announced at national
level
• latest date by which this document has to be (dop) dav + 12 months
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) dav + 36 months
conflicting with this document have to be (to be confirmed or
withdrawn modified when voting)
This document amends EN 50470-3:2022.
EN 50470-3:2022:
— link to prEN IEC 62052-11:2021/prAC:2026
— adaptation of Table 9 with additional waveforms to ensure immunity against severe current transients.
This document has been prepared under a standardization request addressed to CENELEC by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
For the relationship with EU Legislation, see informative Annex ZZ, which is an integral part of this document.
Introduction
The purpose of this amendment is to require an additional test waveform to ensure immunity against severe
current transients.
1 Modifications to Clause 1, “Scope”
Replace NOTE 2 with the following:
“
NOTE 2 For AC electricity meters, the voltage mentioned above is the line-to-neutral voltage derived from nominal
voltages. See EN IEC 62052-31:2024, Table 7. EN IEC 62052-31:2024 covers AC voltages up to 1000 V.“
Replace
“
— meters intended for connection with low power instrument transformers (LPITs as defined in the EN 61869
series) when tested without such transformers;“
with
“
— meters intended for connection with low power instrument transformers (LPITs as defined in the EN 61869
series) when tested without such transformers.
NOTE 6 The exclusion of meters designed for operation with LPITs not directly connected with the LPITs from the
scope of EN 50470-3:2022 does not imply that such meters are not permitted under Directive 2014/32/EU.“
Renumber NOTE 6 as NOTE 7.
Replace NOTE 7 with the following:
“
NOTE 8 Nevertheless, specific tampering detection and prevention requirements, and test methods, as relevant for a
particular market can be defined.“
Renumber NOTE 8 as NOTE 9.
Renumber NOTE 9 as NOTE 10.
Renumber NOTE 10 as NOTE 11.
Renumber NOTE 11 as NOTE 12.
Renumber NOTE 12 as NOTE 13.
2 Modifications to Clause 2, “Normative references”
In Clause 2 and throughout the text, replace “EN IEC 62052-11:2021/A11:2022” with
“prEN IEC 62052-11:2021/prAC:2026“.
3 Modifications to Clause 5, “Constructions requirements”
Replace list item b) with the following:
“
b) The indication of any result shall be readable under normal conditions of use. The necessary marks and
inscriptions to inform the user of the significance of the result shall be provided.
Additional indications may be shown provided they cannot be confused with the metrologically controlled
indications.“
4 Modifications to Clause 7, “Accuracy requirements”
In 7.9, NOTE 3, second sentence, delete “in an agreement between the manufacturer and the purchaser or
according to national regulatory requirements”.
In 7.10, 4th paragraph, replace “selected by the manuf
...