SIST EN IEC 62053-24:2021

Electricity metering equipment (a.c.) - Particular requirements - Part 24: Static meters for reactive energy at fundamental frequency (classes 0,5 S, 1S, 1, 2 and 3)

IEC 62053-24:2020 applies only to static var-hour meters of accuracy classes 0,5S, 1S, 1, 2 and 3 for the measurement of alternating current electrical reactive energy in 50 Hz or 60 Hz networks and it applies to their type tests only.
This document uses a conventional definition of reactive energy where the reactive power and energy is calculated from the fundamental frequency components of the currents and voltages only.
This document applies to electricity metering equipment designed to:
• measure and control electrical energy on electrical networks (mains) with voltage up to 1 000 V AC;
• have all functional elements, including add-on modules, enclosed in, or forming a single meter case with exception of indicating displays;
• operate with integrated or detached indicating displays, or without an indicating display;
• be installed in a specified matching socket or rack;
• optionally, provide additional functions other than those for measurement of electrical energy.
Meters designed for operation with low power instrument transformers (LPITs as defined in the IEC 61869 series) may be considered as compliant with this document only if such meters and their LPITs are tested together and meet the requirements for directly connected meters.
This document does not apply to:
• meters for which the voltage line-to-neutral derived from nominal voltages exceeds 1 000 V AC;
• meters intended for connection with low power instrument transformers (LPITs as defined in the IEC 61869 series) when tested without such transformers;
• metering systems comprising multiple devices (except LPITs) physically remote from one another;
• portable meters;
• meters used in rolling stock, vehicles, ships and airplanes;
• laboratory and meter test equipment;
• reference standard meters;
• data interfaces to the register of the meter;
• matching sockets or racks used for installation of electricity metering equipment;
• any additional functions provided in electrical energy meters.
This document does not cover measures for the detection and prevention of fraudulent attempts to compromise a meter’s performance (tampering).
This second edition cancels and replaces the first edition published in 2014 and its amendment 1:2016. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition: see Annex E

Elektrizitätszähler - Besondere Anforderungen - Teil 24: Elektronische Grundschwingungs-Blindverbrauchszähler der Genauigkeitsklassen 0,5 S, 1 S, 1, 2 und 3

Équipement de comptage de l'électricité - Exigences particulières - Partie 24: Compteurs statiques d'énergie réactive de composante fondamentale (classes 0,5S, 1S, 1, 2 et 3)

IEC 62053-24:2020 est applicable uniquement aux compteurs statiques d'énergie réactive des classes de précision 0,5S, 1S, 1, 2 et 3, destinés à la mesure de l'énergie électrique réactive en courant alternatif sur les réseaux électriques en 50 Hz et 60 Hz, et à leurs essais de type.
Le présent document est fondé sur une définition conventionnelle de l'énergie réactive pour laquelle la puissance et l'énergie réactives ne sont calculées qu'à partir des composantes de fréquence fondamentale des courants et des tensions (voir Article 3).
Le présent document s'applique aux appareils de comptage de l'électricité conçus pour:
• mesurer et piloter l'énergie électrique sur les réseaux électriques (secteur) avec une tension allant jusqu'à 1 000 V en courant alternatif;
• avoir tous les éléments fonctionnels, y compris les modules complémentaires, incorporés dans ou formant un boîtier de compteur unique, à l'exception des afficheurs;
• fonctionner avec des afficheurs intégrés ou séparés, ou sans afficheur;
• être installés dans une embase ou un bâti correspondant spécifié;
• (facultatif) assurer des fonctions autres que celles relatives au comptage de l'énergie électrique.
Les compteurs conçus pour être utilisés avec des transformateurs de mesure de faible puissance (LPIT – Low Power Instrument Transformers, définis dans la série IEC 61869) ne peuvent être jugés conformes au présent document que si ces compteurs et leurs LPIT sont soumis à l'essai ensemble et satisfont aux exigences relatives aux compteurs à branchement direct. Le présent document ne s'applique pas:
• aux compteurs dont la tension phase-neutre déduite des tensions nominales dépasse 1 000 V en courant alternatif;
• aux compteurs destinés à être connectés à des transformateurs de mesure de faible puissance (LPIT, définis dans la série IEC 61869) lorsqu'ils sont soumis à l'essai sans ces transformateurs;
• aux systèmes de comptage comprenant plusieurs dispositifs (à l'exception des LPIT) physiquement éloignés les uns des autres;
• aux compteurs portatifs;
• aux compteurs utilisés dans le matériel roulant, les véhicules, les navires et les avions;
• aux équipements de laboratoire et d'essai des compteurs;
• aux compteurs étalons de référence;
• aux interfaces de communication avec l'élément indicateur du compteur;
• aux embases ou bâtis correspondants utilisés pour l'installation des équipements de comptage de l'électricité;
• à toute fonction complémentaire assurée par les compteurs d'énergie électrique.
Le présent document ne couvre pas les mesures de détection et de prévention des tentatives frauduleuses de compromettre la performance du compteur (falsification).
Cette deuxième édition annule et remplace la première édition parue en 2014 et son amendement 1:2016. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: voir Annexe E

Oprema za merjenje električne energije - Posebne zahteve - 24. del: Statični števci osnovne komponente jalove energije (razredi 0,5 S, 1 S in 1, 2 in 3)

General Information

• Status: Published
• Publication Date: 09-May-2021
• ICS: 17.220.20 - Measurement of electrical and magnetic quantities
• ICS: 91.140.50 - Electricity supply systems
• Technical Committee: MEE - Equipment for electrical energy measurement and load control
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 05-May-2021
• Due Date: 10-Jul-2021
• Completion Date: 10-May-2021
• Directive: 2014/30/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/404 - Standardisation Mandate to CEN, CENELEC and ETSI for harmonized standard according to the Electro Magnetic Compatibility (EMC) Directive 2004/108/EC
• Mandate: M/441 - Standardisation mandate to CEN, CENELEC and ETSI in the field of measuring instruments for the development of an open architecture for utility meters involving communication protocols enabling interoperability
• 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: EN IEC 62053-24:2021 - Electricity metering equipment - Particular requirements - Part 24: Static meters for fundamental component reactive energy (classes 0,5S, 1S, 1, 2 and 3)

Relations

• Replaces: SIST EN 62053-24:2015/A1:2017 - Electricity metering equipment (a.c.) - Particular requirements - Part 24: Static meters for reactive energy at fundamental frequency (classes 0,5 S, 1 S and 1)
• Effective Date: 01-Jun-2021
• Replaces: SIST EN 62053-24:2015 - Electricity metering equipment (a.c.) - Particular requirements - Part 24: Static meters for fundamental component reactive energy (classes 0,5 S, 1S and 1)
• Effective Date: 01-Jun-2021
• Replaces: SIST EN 62053-24:2015/A1:2017/AC:2018 - Electricity metering equipment (a.c.) - Particular requirements - Part 24: Static meters for reactive energy at fundamental frequency (classes 0,5 S, 1 S and 1)
• Effective Date: 01-Jun-2021
• Amended By: SIST EN IEC 62053-24:2021/A11:2021 - Electricity metering equipment - Particular requirements - Part 24: Static meters for fundamental component reactive energy (classes 0,5S, 1S, 1, 2 and 3)
• Effective Date: 01-Nov-2021
• Replaces: SIST EN 62053-24:2015/A1:2017 - Electricity metering equipment (a.c.) - Particular requirements - Part 24: Static meters for reactive energy at fundamental frequency (classes 0,5 S, 1 S and 1)
• Effective Date: 07-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN IEC 62053-24:2021
01-junij-2021
Nadomešča:
SIST EN 62053-24:2015
SIST EN 62053-24:2015/A1:2017
SIST EN 62053-24:2015/A1:2017/AC:2018
Oprema za merjenje električne energije - Posebne zahteve - 24. del: Statični števci
osnovne komponente jalove energije (razredi 0,5 S, 1 S in 1, 2 in 3)
Electricity metering equipment (a.c.) - Particular requirements - Part 24: Static meters for
reactive energy at fundamental frequency (classes 0,5 S, 1S, 1, 2 and 3)
Ta slovenski standard je istoveten z: EN IEC 62053-24:2021
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
SIST EN IEC 62053-24:2021 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN IEC 62053-24:2021

---------------------- Page: 2 ----------------------
SIST EN IEC 62053-24:2021


EUROPEAN STANDARD EN IEC 62053-24

NORME EUROPÉENNE

EUROPÄISCHE NORM
April 2021
ICS 17.220.20; 91.140.50 Supersedes EN 62053-24:2015 and all of its
amendments and corrigenda (if any)
English Version
Electricity metering equipment - Particular requirements - Part
24: Static meters for fundamental component reactive energy
(classes 0,5S, 1S, 1, 2 and 3)
(IEC 62053-24:2020)
Équipement de comptage de l'électricité - Exigences Elektrizitätszähler - Besondere Anforderungen - Teil 24:
particulières - Partie 24: Compteurs statiques d'énergie Elektronische Grundschwingungs-Blindverbrauchszähler
réactive de composante fondamentale (classes 0,5S, 1S, 1, der Genauigkeitsklassen 0,5 S, 1 S, 1, 2 und 3
2 et 3) (IEC 62053-24:2020)
(IEC 62053-24:2020)
This European Standard was approved by CENELEC on 2020-07-22. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists 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,
Turkey and the United Kingdom.


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
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN IEC 62053-24:2021 E

---------------------- Page: 3 ----------------------
SIST EN IEC 62053-24:2021
EN IEC 62053-24:2021 (E)
European foreword
The text of document 13/1804/FDIS, future edition 2 of IEC 62053-24, prepared by IEC/TC 13
"Electrical energy measurement and control" was submitted to the IEC-CENELEC parallel vote and
approved by CENELEC as EN IEC 62053-24:2021.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2021-10-02
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2024-04-02
document have to be withdrawn
This document supersedes EN 62053-24:2015 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a mandate given to CENELEC by the European Commission
and the European Free Trade Association.
Endorsement notice
The text of the International Standard IEC 62053-24:2020 was approved by CENELEC as a European
Standard without any modification.
2

---------------------- Page: 4 ----------------------
SIST EN IEC 62053-24:2021
EN IEC 62053-24:2021 (E)
Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the
relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60375 2018 Conventions concerning electric circuits EN IEC 60375 2018
IEC 62052-11 2020 Electricity metering equipment - General EN IEC 62052-11 2021
requirements, tests and test conditions -
Part 11: Metering equipment

3

---------------------- Page: 5 ----------------------
SIST EN IEC 62053-24:2021

---------------------- Page: 6 ----------------------
SIST EN IEC 62053-24:2021



IEC 62053-24

®


Edition 2.0 2020-06




INTERNATIONAL



STANDARD




NORME


INTERNATIONALE











Electricity metering equipment – Particular requirements –

Part 24: Static meters for fundamental component reactive energy

(classes 0,5S, 1S, 1, 2 and 3)



Équipement de comptage de l'électricité – Exigences particulières –

Partie 24: Compteurs statiques d'énergie réactive de composante fondamentale


(classes 0,5S, 1S, 1, 2 et 3)













INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 17.220.20; 91.140.50 ISBN 978-2-8322-8305-9




Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

---------------------- Page: 7 ----------------------
SIST EN IEC 62053-24:2021
– 2 – IEC 62053-24:2020 © IEC 2020
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 8
2 Normative references . 9
3 Terms and definitions . 10
4 Standard electrical values. 10
4.1 Voltages . 10
4.2 Currents . 10
4.2.1 General . 10
4.2.2 Starting current (see Table 1) . 10
4.2.3 Minimum current (see Table 2) . 10
4.2.4 Maximum current . 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 . 11
7.8 Repeatability test . 11
7.9 Limits of error due to variation of the current . 11
7.10 Limits of error due to influence quantities . 12
7.11 Time-keeping accuracy . 14
8 Climatic requirements . 15
9 The effects of external influences . 15
10 Type test . 15
Annex A (informative) Comparison of acceptable percentage error limits at reference
conditions for meters . 16
Annex B (informative) Geometric representation of active and reactive power. 17
Annex C (informative) Influence of the phase displacement of current and voltage
transformers on reactive energy measurement . 19
Annex D (informative) Treatment of harmonics and tests for harmonics . 20
D.1 Non- sinusoidal conditions and reactive power definition . 20
D.2 Tests for accuracy under non-sinusoidal conditions . 20
D.3 Fifth harmonic test . 21
Annex E (informative) Summary of changes . 22

Figure A.1 – Acceptable percentage error limits, transformer operated (S) and directly
connected meters, I = 5 A, I = 10 A, PF = 1,0 . 16
n max

---------------------- Page: 8 ----------------------
SIST EN IEC 62053-24:2021
IEC 62053-24:2020 © IEC 2020 – 3 –
Figure A.2 – Acceptable percentage error limits, transformer operated (S) and directly
connected meters, I = 5 A, I = 10 A, PF = 0,5 inductive / 0,8 capacitive . 16
n max
Figure B.1 – Recommended geometric representation . 17
Figure B.2 – Alternative geometric representation . 18

Table 1 – Starting current . 10
Table 2 – Minimum current. 10
Table 3 – Acceptable percentage error limits (single-phase meters and poly-phase
meters with balanced loads or single-phase loads) . 12
Table 4 – Acceptable limits of variation in percentage error due to influence quantities . 13
Table C.1 – Phase displacements for current transformer connected meters without
voltage transformers and corresponding maximum measurement errors for reactive
energy . 19
Table C.2 – Phase displacements for current and voltage transformer connected
meters and corresponding maximum measurement errors for reactive energy . 19

---------------------- Page: 9 ----------------------
SIST EN IEC 62053-24:2021
– 4 – IEC 62053-24:2020 © IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

ELECTRICITY METERING EQUIPMENT –
PARTICULAR REQUIREMENTS –

Part 24: Static meters for fundamental component reactive energy
(classes 0,5 S, 1 S, 1, 2 and 3)

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
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) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62053-24 has been prepared by IEC technical committee 13:
Electrical energy measurement and control.
This second edition cancels and replaces the first edition published in 2014 and its amendment
1:2016. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition: see Annex E.

---------------------- Page: 10 ----------------------
SIST EN IEC 62053-24:2021
IEC 62053-24:2020 © IEC 2020 – 5 –
The text of this International Standard is based on the following documents:
FDIS Report on voting
13/1804/FDIS 13/1811/RVD
13/1804(F)/FDIS

Full information on the voting for the approval of this International Standard can be found in the
report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
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 "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
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
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.

---------------------- Page: 11 ----------------------
SIST EN IEC 62053-24:2021
– 6 – IEC 62053-24:2020 © IEC 2020
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, and with the IEC 62055 series, Electricity
metering – Payment systems:
IEC 62052‑11:2020, Electricity metering equipment – General requirements, tests
and test conditions – Part 11: Metering equipment
IEC 62052‑31:2015, Electricity metering equipment (AC) – General requirements,
tests and test conditions – Part 31: Product safety
requirements and tests
IEC 62053‑11:2003, Electricity metering equipment (AC) – Particular requirements
– Part 11: Electromechanical meters for active energy
(classes 0,5, 1 and 2)
IEC 62053-21:2020 Electricity metering equipment – Particular requirements –
Part 21: Static meters for AC active energy (classes 0,5, 1
and 2)
IEC 62053‑22:2020, Electricity metering equipment – Particular requirements –
Part 22: Static meters for AC active energy (classes 0,1 S,
0,2S and 0,5 S)
IEC 62053‑23:2020, Electricity metering equipment – Particular requirements –
Part 23: Static meters for reactive energy (classes 2 and 3)
IEC 62055‑31:2005 Electricity metering – Payment systems – Part 31: Particular
requirements – Static payment meters for active energy
(classes 1 and 2)
IEC 62057‑1: – Test equipment, techniques and procedures for electrical
energy meters – Part 1: Stationary Meter Test Units (MTU)
IEC 62058‑11:2008, Electricity metering equipment (AC) – Acceptance inspection -
–Part 11: General acceptance inspection methods
IEC 62058‑21:2008, Electricity metering equipment (AC) – Acceptance inspection
– Part 21: Particular requirements for electromechanical
meters for active energy (classes 0,5, 1 and 2)
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 62059‑11:2002, Electricity metering equipment – Dependability – Part 11:
General concepts
IEC 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 62052-11:2020 and with
IEC 62052-31:2015. When any requirement in this document concerns an item already covered
in IEC 62052-11:2020 or in IEC 62052-31:2015, the requirements of this document take
precedence over the requirements of IEC 62052-11:2020 or of IEC 62052-31:2015.

---------------------- Page: 12 ----------------------
SIST EN IEC 62053-24:2021
IEC 62053-24:2020 © IEC 2020 – 7 –
The test levels are regarded as minimum values that provide for the proper functioning of the
meter under normal working conditions. For special applications, additional test levels might be
necessary and are subject to an agreement between the manufacturer and the purchaser.

---------------------- Page: 13 ----------------------
SIST EN IEC 62053-24:2021
– 8 – IEC 62053-24:2020 © IEC 2020
ELECTRICITY METERING EQUIPMENT –
PARTICULAR REQUIREMENTS –

Part 24: Static meters for fundamental component reactive energy
(classes 0,5 S, 1 S, 1, 2 and 3)



1 Scope
This part of IEC 62053 applies only to static var-hour meters of accuracy classes 0,5 S, 1 S, 1,
2 and 3 for the measurement of alternating current electrical reactive energy in 50 Hz or 60 Hz
networks and it applies to their type tests only.
This document uses a conventional definition of reactive energy where the reactive power and
energy is calculated from the fundamental frequency components of the currents and voltages
only (see Clause 3).
NOTE 1 This differs from IEC 62053-23, where reactive power and energy is only defined for sinusoidal signals. In
this document reactive power and energy is defined for all periodic signals. Reactive power and energy is defined in
this way to achieve proper reproducibility of measurements with meters of different designs. With this definition,
reactive power and energy reflects the generally unnecessary current possible to compensate with capacitors rather
than the total unnecessary current.
NOTE 2 For other general requirements, such as safety, dependability, etc., see the relevant IEC 62052 or
IEC 62059 standards.
This document applies to electricity metering equipment designed to:
• measure and control electrical energy on electrical networks (mains) with voltage up to
1 000 V AC;
NOTE 3 For AC electricity meters, the voltage mentioned above is the line-to-neutral voltage derived from nominal
voltages. See IEC 62052-31:2015, Table 7;
• have all functional elements, including add-on modules, enclosed in, or forming a single
meter case with exception of indicating displays;
• operate with integrated or detached indicating displays, or without an indicating display;
• be installed in a specified matching socket or rack;
• optionally, provide additional functions other than those for measurement of electrical
energy.
Meters designed for operation with low power instrument transformers (LPITs as defined in the
IEC 61869 series) may be considered as compliant with this document only if such meters and
their LPITs are tested together and meet the requirements for directly connected meters.
NOTE 4 Modern electricity meters typically contain additional functions such as measurement of voltage magnitude,
current magnitude, power, frequency, power factor, etc.; measurement of power quality parameters; load control
functions; delivery, time, test, accounting, recording functions; data communication interfaces and associated data
security functions. The relevant standards for these functions may apply in addition to the requirements of this
document. However, the requirements for such functions are outside the scope of this document.
NOTE 5 Product requirements for power metering and monitoring devices (PMDs) and measurement functions such
as voltage magnitude, current magnitude, power, frequency, etc., are covered in IEC 61557-12. However, devices
compliant with IEC 61557-12 are not intended to be used as billing meters unless they are also compliant with the
IEC 62052-11:2020 and one or more relevant IEC 62053-xx accuracy class standards.
NOTE 6 Product requirements for power quality instruments (PQIs) are covered in IEC 62586-1. Requirements for
power quality measurement techniques (functions) are covered in IEC 61000-4-30. Requirements for testing of the
power quality measurement functions are covered in IEC 62586-2.

---------------------- Page: 14 ----------------------
SIST EN IEC 62053-24:2021
IEC 62053-24:2020 © IEC 2020 – 9 –
This document does not apply to:
• meters for which the voltage line-to-neutral derived from nominal voltages exceeds
1 000 V AC;
• meters intended for connection with low power instrument transformers (LPITs as defined
in the IEC 61869 series) when tested without such transformers;
• metering systems comprising multiple devices (except LPITs) physically remote from one
another;
• portable meters;
NOTE 7 Portable meters are meters that are not permanently connected;
• meters used in rolling stock, vehicles, ships and airplanes;
• laboratory and meter test equipment;
• reference standard meters;
• data interfaces to the register of the meter;
• matching sockets or racks used for installation of electricity metering equipment;
• any additional functions provided in electrical energy meters.
This document does not cover measures for the detection and prevention of fraudulent attempts
to compromise a meter’s performance (tampering).
NOTE 8 Nevertheless, specific tampering detection and prevention requirements, and test methods, as relevant for
a particular market are subject to the agreement between the manufacturer and the purchaser.
NOTE 9 Specifying requirements and test methods for fraud detection and prevention would be counterproductive,
as such specifications would provide guidance for potential fraudsters.
NOTE 10 There are many methods of tampering with meters reported from various markets; designing meters to
detect and prevent all kinds of tampering would lead to unjustified increase in costs of meter design, verification and
validation.
NOTE 11 Billing systems, such as, smart metering systems, are capable of detecting irregular consumption patterns
and irregular network losses which enable discovery of suspected meter tampering.
NOTE 12 For transformer operated meters paired with current transformers (CTs) according to IEC 61869-2:
– the standard CT measuring range is specified from 0,05 I to I for accuracy classes 0,1, 0,2, 0,5 and 1 and
n max
these CTs are used for meters of class 1, 2 and 3 according to this document;
– the special CT measuring range is specified from 0,01 I to I for accuracy classes 0,2S and 0,5 S and these
n max
CTs are used for meters of class 0,5 S and 1 S according to this document;
– combinations of standard CTs and meters of class 0,5 S and 1 S are subject to an agreement between
manufacturers and purchasers.
NOTE 13 This document does not specify emission requirements, these are specified in IEC 62052-11:2020, 9.3.14.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60375:2018, Conventions concerning electric circuits
IEC 62052-11:2020, Electricity metering equipment – General requirements, tests and test
conditions – Part 11: Metering equipment

---------------------- Page: 15 ----------------------
SIST EN IEC 62053-24:2021
– 10 – IEC 62053-24:2020 © IEC 2020
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 62052-11:2020 apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia website: http://www.electropedia.
...