prEN IEC 62053-21:2026

• Status: Not Published
• Publication Date: 02-Jan-2028
• ICS: 17.220.20 - Measurement of electrical and magnetic quantities
• Technical Committee: CLC/TC 13 - Equipment for electrical energy measurement and load control
• Current Stage: 4060 - Enquiry results established and sent to TC, SR, BTTF - Enquiry
• Start Date: 28-Aug-2026
• Completion Date: 28-Aug-2026
• Directive: Harmonized Standard2014/30/EU - Directive 2014/30/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 electromagnetic compatibility (recast)
• Mandate: M/552 - [C(2016) 7641 final] Standardisation request as regards harmonised standards in support of Directive 2014/30/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 electromagnetic compatibility
• Ref Project: oSIST prEN IEC 62053-21:2026 - Electricity metering equipment - Particular requirements - Part 21: Static meters for AC active energy (classes 0,5, 1 and 2)

• Revises: EN IEC 62053-21:2021 - Electricity metering equipment - Particular requirements - Part 21: Static meters for AC active energy (classes 0,5, 1 and 2)
• Effective Date: 08-Apr-2025
• Revises: EN IEC 62053-21:2021/A11:2021 - Electricity metering equipment - Particular requirements - Part 21: Static meters for AC active energy (classes 0,5, 1 and 2)
• Effective Date: 08-Apr-2025

Overview

prEN IEC 62053-21:2026 specifies particular requirements for static meters used to measure alternating current (AC) active energy in electricity supply networks. Developed by CLC in partnership with the IEC, this standard applies to static watt-hour meters of accuracy classes 0.5, 1, and 2. These meters are widely employed for billing and energy management in residential, commercial, and industrial settings.

The standard outlines type test procedures for meters operating at voltages up to 1,000 V and frequencies of 50 or 60 Hz. It includes requirements addressing nominal electrical values, accuracy, performance affected by environmental and electrical influences, construction, and marking.

Key Topics

• Accuracy Classes 0.5, 1, and 2: Defines limits of permissible error and performance criteria under reference conditions for various meter types, ensuring reliable energy measurement for billing and operational planning.
• Nominal Electrical Values: Sets expectations for voltage, current, and frequency ranges, including limits for starting current and minimum/maximum current values.
• Type Testing: Describes comprehensive procedures for type testing of meters, including requirements for construction, marking, and documentation.
• Influence Quantities: Details the permissible error shifts due to external factors such as electromagnetic interference, temperature changes, and voltage fluctuations, thereby ensuring stability and reliability in real-world conditions.
• Test Conditions: Outlines the reference and influence conditions required for certified testing to maintain repeatability and comparability across meter products.
• Meter Marking: Ensures clear documentation and identification to support traceability and correct installation.

Applications

prEN IEC 62053-21:2026 is primarily relevant to:

• Utilities and Energy Providers: Used as a basis for procurement, commissioning, and acceptance of energy meters for revenue metering.
• Meter Manufacturers: Reference for the design, development, and type testing of new static electricity meters, supporting compliance with international market requirements.
• Testing Laboratories: Basis for type conformity evaluation, providing defined test protocols for evaluation under various operational conditions.
• Regulatory and Certification Bodies: Essential for certification schemes and the promotion of interoperability and fairness in energy measurement and billing.
• Building and Facility Management: Provides criteria to ensure accurate submetering and allocation of energy costs based on reliable meter data.

Related Standards

To ensure comprehensive compliance and performance, prEN IEC 62053-21:2026 should be used in conjunction with related standards, including:

• IEC 62052-11: General requirements, tests, and test conditions for electricity metering equipment.
• IEC 62052-31: Product safety requirements and tests for meter equipment.
• IEC 62053-22 & IEC 62053-24: Requirements for static meters for higher accuracy classes and for reactive energy.
• IEC 62058 Series: Acceptance inspection methods for electricity metering equipment.
• IEC 62059 Series: Meter dependability and durability tests.
• IEC 61557-12 and IEC 62586-1: Specifications for supplementary metering and power quality instruments.

Practical Value

Implementing prEN IEC 62053-21:2026 ensures:

• Standardization in Metering: Promotes interoperability and comparability across meter types and brands, critical for fair energy billing.
• Quality Assurance: Improves confidence in metering accuracy, supporting both regulatory compliance and customer trust.
• Future-Proofing: Aligns with current best practices and international requirements, fostering easier integration into smart grid and advanced metering infrastructure strategies.
• Reduced Disputes: Minimizes potential billing disputes stemming from inaccuracies or misapplication by providing a clear performance baseline.

Keywords: static energy meters, AC active energy, electricity metering equipment, type testing, accuracy classes, performance requirements, IEC 62053-21, metering standard, utility compliance, energy billing, meter accuracy, test procedures.

SLOVENSKI STANDARD
01-julij-2026
Oprema za merjenje električne energije - Posebne zahteve - 21. del: Statični števci
delovne energije (razreda 0,5, 1 in 2)
Electricity metering equipment - Particular requirements - Part 21: Static meters for AC
active energy (classes 0,5, 1 and 2)
Elektrizitätszähler - Besondere Anforderungen - Teil 21: Elektronische
Wirkverbrauchszähler für Wechselstrom der Genauigkeitsklassen 0,5, 1 und 2
équipement de comptage de l'électricité - Exigences particulières - Partie 21: Compteurs
statiques d'énergie active en courant alternatif (classes 0,5, 1 et 2)
Ta slovenski standard je istoveten z: prEN IEC 62053-21:2026
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.

13/2001/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 62053-21 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2026-06-05 2026-08-28
SUPERSEDES DOCUMENTS:
13/1948/CD, 13/1995/CC
IEC TC 13 : ELECTRICAL ENERGY MEASUREMENT AND CONTROL
SECRETARIAT: SECRETARY:
Hungary Mr Bela Bodi
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):
TC 85,ACEC
ASPECTS CONCERNED:
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some
Countries” clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is
the final stage for submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Electricity metering equipment - Particular requirements - Part 21: Static meters for AC active
energy (classes 0,5, 1 and 2)
PROPOSED STABILITY DATE: 2032
NOTE FROM TC/SC OFFICERS:
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IEC CDV 62053-21 © IEC 2026
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IEC CDV 62053-21 © IEC 2026
CONTENTS
CONTENTS . 1
FOREWORD . 3
INTRODUCTION . 6
1 Scope . 8
2 Normative references . 9
3 Terms and definitions . 9
4 Nominal electrical values . 10
4.1 Voltages . 10
4.2 Currents . 10
4.2.1 Nominal current signal . 10
4.2.2 Starting current signal . 10
4.2.3 Minimum current signal . 10
4.2.4 Transitional current signal . 10
4.2.5 Maximum current signal . 10
4.3 Frequencies . 11
4.4 Power consumption. 11
5 Construction requirements . 11
6 Meter marking and documentation . 11
7 Accuracy requirements . 11
7.1 General test conditions . 11
7.2 Methods of accuracy verification . 11
7.3 Measurement uncertainty . 11
7.4 Meter constant . 11
7.5 Initial start-up of the meter . 11
7.6 Test of no-load condition . 11
7.7 Starting current test . 12
7.8 Repeatability test . 12
7.9 Limits of error due to variation of the current signal . 12
7.10 Limits of error shift due to influence quantities . 13
7.11 Time-keeping accuracy . 15
8 Climatic requirements . 15
9 The effects of external influences . 15
10 Type test . 15
Annex A (informative) Comparison of relative error limits at reference conditions for
meters of classes 0,5, 1 and 2 . 16
Bibliography . 17

Figure A.1 – Comparison of relative error limits for meters of classes 0,5, 1 and 2, with
I = 10 A and I = 20 A, at power factor = 1,0, for direct connection . 16
n max
Figure A.2 – Comparison of relative error limits for meters of classes 0,5, 1 and 2, with
I = 10 A and I = 20 A, at power factor = 0,5 inductive, for direct connection . 16
n max
Table 1 – Starting current signal . 10
Table 2 – Minimum current signal . 10
Table 3 – Transitional current signal . 10
IEC CDV 62053-21 © IEC 2026
Table 4 – Maximum current signal . 11
Table 5 – Limits of relative error at reference conditions (single-phase meters and
poly-phase meters with balanced loads or single-phase loads) . 12
Table 6 – Limits of relative error shift due to influence quantities . 13

IEC CDV 62053-21 © IEC 2026
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Electricity metering equipment - Particular requirements -
Part 21: Static meters for AC active energy (classes 0,5, 1 and 2)

FOREWORD
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced
publications is indispensable for the correct application of this publication.
9) IEC draws attention to the possibility that the implementation of this document may involve
the use of (a) patent(s). IEC takes no position concerning the evidence, validity or applicability
of any claimed patent rights in respect thereof. As of the date of publication of this document,
IEC had not notice of (a) patent(s), which may be required to implement this document.
However, implementers are cautioned that this may not represent the latest information, which
IEC CDV 62053-21 © IEC 2026
may be obtained from the patent database available at https://patents.iec.ch and 9) IEC draws
attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed
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notice of (a) patent(s), which may be required to implement this document. However,
implementers are cautioned that this may not represent the latest information, which may be
obtained from the patent database available at https://patents.iec.ch and www.iso.org/patents .
IEC shall not be held responsible for identifying any or all such patent rights. . IEC shall not be
held responsible for identifying any or all such patent rights.
IEC 62053-21 has been prepared by IEC technical committee 13: Electrical energy
measurement and control. It is an International Standard.
This third edition cancels and replaces the second edition published in 2020. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) Normative references have been updated;
b) Transducer-operated meters included in scope (tested without transducers);
c) The transitional current has been introduced;
d) The starting current, minimum current and maximum current have been expressed as
fractions of the transitional current;
e) The test "Ripple on DC supply voltage" has been introduced;
f) Figures in Annex A have been revised.
The text of this International Standard is based on the following documents:
Draft Report on voting
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English [change
language if necessary].
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts in the IEC 62053 series, published under the general title Electricity metering
equipment – Particular requirements, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
– reconfirmed,
– withdrawn, or
– revised.
NOTE The attention of National Committees is drawn to the fact that equipment manufacturers and testing
organizations may need a transitional period following publication of a new, amended or revised IEC publication in
IEC CDV 62053-21 © IEC 2026
which to make products in accordance with the new requirements and to equip themselves for conducting new or
revised tests.
It is the recommendation of the committee that the content of this publication be adopted for implementation nationally
not earlier than 2 years from the date of publication.
IEC CDV 62053-21 © IEC 2026
INTRODUCTION
This part of IEC 62053 is to be used with relevant parts of the IEC 62052, IEC 62058 and
IEC 62059 series, Electricity metering equipment, with the IEC 62055 series, Electricity
metering – Payment systems and with the IEC 62057 series, Electrical energy meters:
IEC 62052-11 edition 3 CDV:2026 , Electricity metering equipment – General requirements,
tests and test conditions – Part 11: Metering equipment
IEC 62052-31:2024, Electricity metering equipment – General requirements, tests and test
conditions – Part 31: Product safety requirements and tests
IEC 62052-41:2022, Electricity metering equipment – General requirements, tests and test
conditions – Part 41: Energy registration methods and requirements for multi-energy and multi-
rate meters
IEC 62053-22 edition 3 CDV :2026, Electricity metering equipment – Particular requirements –
Part 22: Static meters for AC active energy (classes 0,1 S, 0,2 S and 0,5 S)
IEC 62053-24 edition 3 CDV :2026, Electricity metering equipment – Particular requirements –
Part 24: Static meters for fundamental component reactive energy (classes 0,5 S, 1 S, 1, 2 and
3)
IEC 62055-31:2022, Electricity metering – Payment systems – Part 31: Particular requirements
– Static payment meters for active energy (classes 1 and 2)
IEC 62057-1:2023, Electrical energy meters – Test equipment, techniques and procedures –
Part 1: Stationary meter test units (MTUs)
IEC 62057-3:2024, Electrical energy meters – Test equipment, techniques and procedures –
Part 3: Automatic meter testing system (AMTS)
IEC 62058-11:2008, Electricity metering equipment (AC) – Acceptance inspection – Part 11:
General acceptance inspection methods
IEC 62058-31:2008, Electricity metering equipment (AC) – Acceptance inspection – Part 31:
Particular requirements for static meters for active energy (classes 0,2 S, 0,5 S, 1 and 2)
IEC TR 62059-11:2002, Electricity metering equipment – Dependability – Part 11: General
concepts
IEC TR 62059-21:2002, Electricity metering equipment – Dependability – Part 21: Collection of
meter dependability data from the field
IEC 62059-32-1:2011, Electricity metering equipment – Dependability – Part 32-1: Durability –
Testing of the stability of metrological characteristics by applying elevated temperature
This part is a standard for type testing electricity meters. It covers the particular requirements
for meters, being used indoors and outdoors in large quantities worldwide. It does not deal with
special implementations (such as metering-part and/or displays in separate housings).
This document is intended to be used in conjunction with IEC 62052-11 edition 3 CDV :2026
and with IEC 62052-31:2024. When any requirement in this document concerns an item already
covered in IEC 62052-11 edition 3 CDV :2026 or in IEC 62052-31:2024, the requirements of
this document take precedence over the requirements of IEC 62052-11 edition 3 CDV :2026 or
of IEC 62052‑31:2024.
IEC CDV 62053-21 © IEC 2026
The specifications and test levels in this document are regarded as minimum values for the
proper functioning of electricity measurement and load control equipment under normal working
conditions. For special applications, additional or ext
...