SIST EN IEC 62055-31:2022

Electricity metering - Payment systems - Part 31: Particular requirements - Static payment meters for active energy (classes 0,5, 1 and 2)

This part of IEC 62055 applies to newly manufactured, static watt-hour payment meters of
accuracy classes 0,5, 1 and 2 for direct connection, for the measurement of alternating current
electrical energy consumption of a frequency in the range 45 Hz to 65 Hz that include a supply
control switch for the purpose of interruption or restoration of the electricity supply to the load
in accordance with the current value of the available credit maintained in the payment meter. It
does not apply to static watt-hour payment meters where the voltage across the connection
terminals exceeds 1 000 V (line-to-line voltage for meters for polyphase systems).
It applies to payment meters for indoor application, operating under normal climatic conditions
where the payment meter is mounted as for normal service (i.e. together with a specified
matching socket where applicable).
Payment meters are implementations where all the main functional elements are incorporated
in a single enclosure, together with any specified matching socket. There are also multi-device
payment metering installations where the various main functional elements, such as the
measuring element, the user interface unit, token carrier interface, and the supply control switch
are implemented in more than one enclosure, involving additional interfaces.
Functional requirements that apply to payment meters are also defined in this document, and
include informative basic functional requirements and tests for the prepayment mode of
operation in Annex A. Allowances are made for the relatively wide range of features, options,
alternatives, and implementations that may be found in practice. The diverse nature and
functionality of payment meters prevent the comprehensive specification of detailed test
methods for all of these requirements. However, in this case, the requirements are stated in
such a way that tests can then be formulated to respect and validate the specific functionality
of the payment meter being tested.
This document does not cover specific functionality or performance requirements for circuit
protection, isolation or similar purposes that may be specified through reference to other
specifications or standards. Safety requirements removed from Edition 1.0 have been replaced
with references to the safety requirements now contained in IEC 62052-31:2015, the product
safety standard for newly manufactured electricity meters. In-service safety testing (ISST) is
not covered by IEC 62052-31:2015 and is left to national best practice usually as an extension
of existing in-service testing (IST) of metrology stability.
This document does not cover software requirements. This document covers type-testing
requirements only. For acceptance testing, the requirements given in IEC 62058‑11:2008 and
IEC 62058-31:2008 may be used.
Dependability aspects are addressed in the IEC 62059 series of standards. Additional reliability,
availability, maintenance and life cycle aspects are provided by IEC TC 56.
This document does not cover conformity tests and system compliance tests that may be
required in connection with legal or other requirements of some markets

Messung der elektrischen Energie - Zählersysteme mit Inkassofunktion - Teil 31: Besondere Anforderungen - Elektronische Inkasso-Wirkverbrauchszähler der Genauigkeitsklassen 0,5, 1 und 2

Équipements de comptage de l'électricité - Systèmes à paiement - Partie 31: Exigences particulières - Compteurs statiques à paiement d'énergie active (classes 0,5, 1 et 2)

L'IEC 62055-31:2022 s’applique à des compteurs à paiement statiques de wattheures nouvellement fabriqués de classe de précision 0,5, 1 et 2 pour raccordement direct, pour la mesure de la consommation d’énergie électrique en courant alternatif d’une fréquence allant de 45 Hz à 65 Hz, incluant un interrupteur de commande de l’alimentation ayant pour but d'interrompre ou de rétablir la fourniture d’électricité à la charge en fonction de la valeur courante du crédit disponible maintenu dans le compteur à paiement. Elle ne s’applique pas aux compteurs à paiement statiques de wattheures dont la tension entre bornes de raccordement dépasse 1 000 V (tension entre phases pour les compteurs de systèmes polyphasés). Elle s’applique aux compteurs à paiement pour applications intérieures utilisées dans des conditions climatiques normales, là où le compteur à paiement est monté comme en service normal (c’est-à-dire avec un socle correspondant spécifié, le cas échéant). Les compteurs à paiement constituent des mises en œuvre de tous les éléments fonctionnels principaux incorporés dans une enceinte unique, avec un socle correspondant spécifié. Il existe également des installations de comptage à paiement à dispositifs multiples, dans lesquelles les divers éléments fonctionnels principaux, par exemple l’élément de mesure, l’unité d’interface utilisateur, l’interface de support de jeton et l’interrupteur de commande de l’alimentation, sont mis en œuvre dans plusieurs enceintes, ce qui implique des interfaces supplémentaires. Les exigences fonctionnelles qui s’appliquent aux compteurs à paiement sont également définies dans le présent document, et comprennent des exigences fonctionnelles informatives de base et des essais pour le mode de fonctionnement par prépaiement de l’Annexe A. Des marges sont prévues pour le domaine relativement large de caractéristiques, options, aides actives et mises en œuvre qui peuvent exister en pratique. La nature et les fonctionnalités diverses des compteurs à paiement empêchent une spécification exhaustive de méthodes d’essai détaillées pour toutes ces exigences. Dans ce cas toutefois, les exigences sont mentionnées de telle manière que des essais puissent ensuite être formulés pour respecter et valider la fonctionnalité spécifique du compteur à paiement soumis à essai. Le présent document ne traite pas de la fonctionnalité spécifique ou des exigences de performance concernant la protection des circuits, l’isolation ou des objectifs similaires qui peuvent être spécifiés en référence à d’autres spécifications ou normes. Les exigences de sécurité supprimées de l’Edition 1.0 ont été remplacées par des références aux exigences de sécurité, qui se trouvent à présent dans l’IEC 62052-31:2015, qui est la norme de sécurité produit des compteurs électriques nouvellement fabriqués. Les essais de sécurité en service (in-service safety testing – ISST) ne sont pas couverts par l’IEC 62052-31:2015 et cèdent la place aux meilleures pratiques du pays, habituellement comme extension des essais en service (in-service testing – IST) existants concernant la stabilité métrologique. Le présent document ne traite pas des exigences logicielles. Le présent document traite uniquement des exigences d’essai de type. Pour les essais d’acceptation, les exigences données dans l’IEC 62058-11:2008 et l’IEC 62058-31:2008 peuvent être utilisées. Les aspects de sûreté sont traités dans la série de normes IEC 62059. Les aspects supplémentaires relatifs à la fiabilité, la disponibilité, la maintenance et la durée de vie sont donnés par l’IEC TC 56. Le présent document ne traite pas des essais de conformité ni des essais de conformité du système qui peuvent être exigés en relation avec des exigences légales ou au

Merjenje električne energije - Plačilni sistemi - 31. del: Posebne zahteve - Statični plačilni števci za delovno energijo (razredi 0,5, 1 in 2)

Ta del standarda IEC 62055 se uporablja za novo izdelane statične plačilne števce vatnih ur razredov točnosti 0,5, 1 in 2 za neposredno povezavo za merjenje porabe električne energije izmeničnega toka s frekvenco v območju od 45 Hz do 65 Hz, ki vključujejo stikalo za krmiljenje napajanja za namene prekinitve ali ponovne vzpostavitve napajanja bremena z električno energijo v skladu s trenutno vrednostjo razpoložljivega kredita, ki se vodi v plačilnem števcu. Dokument se ne uporablja za statične plačilne števce vatnih ur, pri katerih napetost v povezovalnih priključkih presega 1000 V (medlinijska napetost za števce večfaznih sistemov).
Dokument se uporablja za plačilne števce v zaprtih prostorih, ki delujejo v normalnih klimatskih pogojih, kjer je plačilni števec nameščen za običajno uporabo (tj. skupaj z določeno ujemajočo se vtičnico, kjer je primerno).
Plačilni števci so naprave, v katerih so vsi glavni funkcionalni elementi v enem ohišju, skupaj z morebitno ujemajočo se vtičnico. Obstajajo tudi namestitve plačilnih števcev iz več naprav, pri katerih so različni glavni funkcionalni elementi, kot so merilni element, enota uporabniškega vmesnika, vmesnik nosilca žetonov in stikalo za nadzor napajanja v več kot enem ohišju, kar vključuje dodatne vmesnike.
Funkcionalne zahteve, ki veljajo za plačilne števce, so prav tako opredeljene v tem dokumentu ter v dodatku A vključujejo informativne osnovne funkcionalne zahteve in preskuse za predplačniški način delovanja. Na voljo so podatki za razmeroma širok nabor funkcij, možnosti, alternativ in izvedb, ki jih je mogoče najti v praksi. Raznolika narava in funkcionalnost plačilnih števcev preprečuje celovito specifikacijo podrobnih preskusnih metod za vse te zahteve. Vendar so v tem primeru zahteve navedene tako, da je mogoče preskuse zastaviti tako, da se upošteva in potrdi specifična funkcionalnost preskušanega plačilnega števca.
Ta dokument ne zajema posebnih funkcij ali zahtev glede zmogljivosti za zaščito tokokroga, izolacijo ali podobne namene, ki so lahko določene s sklicevanjem na druge specifikacije ali standarde. Varnostne zahteve, ki so bile odstranjene iz izdaje 1.0, so nadomeščene s sklicevanjem na varnostne zahteve, ki jih zdaj vsebuje standard IEC 62052-31:2015, standard o varnosti izdelkov za novo proizvedene števce električne energije. Preskušanje varnosti med uporabo (ISST) ni zajeto v standardu IEC 62052-31:2015 in je prepuščeno nacionalni dobri praksi, običajno kot razširitev obstoječega preskušanja meroslovne stabilnosti med uporabo (IST).
Ta dokument ne zajema zahtev glede programske opreme. Ta dokument obravnava samo zahteve za tipsko preskušanje. Za preskus sprejemljivosti se lahko uporabijo zahteve iz standardov IEC 62058-11:2008 in IEC 62058-31:2008.
Vidiki glede zagotovljivosti so obravnavani v skupini standardov IEC 62059. Dodatni vidiki glede zanesljivosti, razpoložljivosti, vzdrževanja in življenjskega cikla so navedeni v standardu IEC TC 56.
Ta dokument ne zajema preskusov skladnosti in preskusov združljivosti sistema, ki so morda potrebni v povezavi z zakonskimi ali drugimi zahtevami nekaterih trgov.

General Information

• Status: Published
• Publication Date: 19-Oct-2022
• 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: 12-Oct-2022
• Due Date: 17-Dec-2022
• Completion Date: 20-Oct-2022
• Ref Project: EN IEC 62055-31:2022 - Electricity metering - Payment systems - Part 31: Particular requirements - Static payment meters for active energy (classes 0,5, 1 and 2)

Relations

• Replaces: SIST EN 62055-31:2007 - Electricity metering - Payment systems -- Part 31: Particular requirements - Static payment meters for active energy (classes 1 and 2)
• Effective Date: 01-Nov-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN IEC 62055-31:2022
01-november-2022
Nadomešča:
SIST EN 62055-31:2007
Merjenje električne energije - Plačilni sistemi - 31. del: Posebne zahteve - Statični
plačilni števci za delovno energijo (razredi 0,5, 1 in 2)
Electricity metering - Payment systems - Part 31: Particular requirements - Static
payment meters for active energy (classes 0,5, 1 and 2)
Messung der elektrischen Energie - Zählersysteme mit Inkassofunktion - Teil 31:
Besondere Anforderungen - Elektronische Inkasso-Wirkverbrauchszähler der
Genauigkeitsklassen 0,5, 1 und 2
Équipements de comptage de l'électricité - Systèmes à paiement - Partie 31: Exigences
particulières - Compteurs statiques à paiement d'énergie active (classes 0,5, 1 et 2)
Ta slovenski standard je istoveten z: EN IEC 62055-31:2022
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 62055-31:2022 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 62055-31:2022

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SIST EN IEC 62055-31:2022


EUROPEAN STANDARD EN IEC 62055-31

NORME EUROPÉENNE

EUROPÄISCHE NORM August 2022
ICS 91.140.50 Supersedes EN 62055-31:2005
English Version
Electricity metering - Payment systems - Part 31: Particular
requirements - Static payment meters for active energy (classes
0,5, 1 and 2)
(IEC 62055-31:2022)
Équipements de comptage de l'électricité - Systèmes à Messung der elektrischen Energie - Zählersysteme mit
paiement - Partie 31: Exigences particulières - Compteurs Inkassofunktion - Teil 31: Besondere Anforderungen -
statiques à paiement d'énergie active (classes 0,5, 1 et 2) Elektronische Inkasso-Wirkverbrauchszähler der
(IEC 62055-31:2022) Genauigkeitsklassen 0,5, 1 und 2
(IEC 62055-31:2022)
This European Standard was approved by CENELEC on 2022-07-26. 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,
Türkiye 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
© 2022 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN IEC 62055-31:2022 E

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SIST EN IEC 62055-31:2022
EN IEC 62055-31:2022 (E)
European foreword
The text of document 13/1864/FDIS, future edition 2 of IEC 62055-31, 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 62055-31:2022.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2023-04-26
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2025-07-26
document have to be withdrawn
This document supersedes EN 62055-31:2005 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.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 62055-31:2022 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 62059 (series) NOTE Harmonized as EN 62059 (series)
2

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SIST EN IEC 62055-31:2022
EN IEC 62055-31:2022 (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 60050-300 2001 International Electrotechnical Vocabulary – - -
Electrical and electronic measurements and
measuring instruments – Part 311: General
terms relating to measurements – Part 312:
General terms relating to electrical
measurements – Part 313: Types of electrical
measuring instruments – Part 314: Specific
terms according to the type of instrument
+ AMD1 2015 - -
+ AMD2 2016 - -
+ AMD3 2017 - -
+ AMD4 2020 - -
IEC/TR 62051 1999 Electricity metering - Glossary of terms - -
IEC 62052-11 2020 Electricity metering equipment - General EN IEC 62052-11 2021
requirements, tests and test conditions - Part
11: Metering equipment
IEC 62052-31 2015 Electricity metering equipment (AC) - General EN 62052-31 2016
requirements, tests and test conditions - Part
31: Product safety requirements and tests
IEC 62053-21 2020 Electricity metering equipment - Particular EN IEC 62053-21 2021
requirements - Part 21: Static meters for AC
active energy (classes 0,5, 1 and 2)
- - + A11 2021
IEC 62054-21 2004 Electricity metering (a.c.) - Tariff and load EN 62054-21 2004
control - Part 21: Particular requirements for
time switches
+ A1 2017 + A1 2017
IEC/TR 62055-21 2005 Electricity metering - Payment systems - - -
Part 21: Framework for standardization
3

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SIST EN IEC 62055-31:2022
EN IEC 62055-31:2022 (E)
Publication Year Title EN/HD Year
IEC 62058-11 2008 Electricity metering equipment (AC) - EN 62058-11 2010
(mod) Acceptance inspection - Part 11: General
acceptance inspection methods
IEC 62058-31 2008 Electricity metering equipment (AC) - EN 62058-31 2010
(mod) Acceptance inspection - Part 31: Particular
requirements for static meters for active
energy (classes 0,2 S, 0,5 S, 1 and 2)

4

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SIST EN IEC 62055-31:2022



IEC 62055-31

®


Edition 2.0 2022-06




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE











Electricity metering – Payment systems –

Part 31: Particular requirements – Static payment meters for active energy

(classes 0,5, 1 and 2)




Équipements de comptage de l’électricité – Systèmes à paiement –

Partie 31: Exigences particulières – Compteurs statiques à paiement d’énergie


active (classes 0,5, 1 et 2)













INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 91.140.50 ISBN 978-2-8322-3803-5




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

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SIST EN IEC 62055-31:2022
– 2 – IEC 62055-31:2022 © IEC 2022
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 9
3 Terms and definitions . 9
3.1 General payment metering . 9
3.2 Tokens . 11
3.3 Token carriers . 12
3.4 Tokens and token carriers . 14
3.5 Switches of metering equipment . 15
3.6 Timekeeping and tariff control . 15
4 Nominal electrical values . 17
5 Construction requirements . 17
5.1 General . 17
5.2 Clearance and creepage distances . 17
5.3 Protection against penetration of dust and water . 17
5.4 Display of measured values . 17
5.4.1 General . 17
5.4.2 Minimum display capability . 17
5.4.3 Indicators . 18
5.5 Storage of measured values . 18
5.6 Output device . 18
5.7 Marking of the meter . 18
5.8 Token carrier interface . 19
5.8.1 General . 19
5.8.2 Token carrier acceptor . 19
5.8.3 Keypad interface. 19
6 Climatic conditions . 19
6.1 General . 19
6.2 Temperature range . 19
6.2.1 General . 19
6.2.2 Operation within the specified operating range . 19
6.2.3 Operation within the limit range of operation . 20
6.2.4 Storage and transport outside the limit range of operation . 20
6.3 Relative humidity . 20
6.4 Protection against penetration of dust and water . 21
6.5 Tests of the effect of the climatic environments . 21
7 Electrical requirements . 21
7.1 General requirements . 21
7.2 Influence of supply voltage. 21
7.2.1 Voltage range(s) . 21
7.2.2 Voltage dips and short interruptions . 22
7.2.3 Abnormal voltage conditions . 23
7.3 Heating . 23
7.4 Insulation . 23

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SIST EN IEC 62055-31:2022
IEC 62055-31:2022 © IEC 2022 – 3 –
7.5 Long Term Over Voltage Withstand . 24
7.6 Electromagnetic compatibility (EMC) . 24
7.6.1 General . 24
7.6.2 General test conditions . 24
7.6.3 Test of immunity to electrostatic discharges. 24
7.6.4 Test of immunity to radiated RF electromagnetic fields . 24
7.6.5 Test of immunity to electrical fast transients/bursts . 25
7.6.6 Test of immunity to conducted disturbances, induced by RF fields . 25
7.6.7 Surge immunity test . 25
7.6.8 Test of immunity to damped oscillatory waves . 25
7.6.9 Radio interference suppression . 25
7.7 Power consumption . 25
7.7.1 General . 25
7.7.2 Voltage circuits . 26
7.7.3 Current circuits . 26
7.8 Influence of self-heating on accuracy . 26
7.9 Electrical tests on supply control and load control switches (SCS and LCS) . 26
7.10 Auxiliary control switches (ACS) . 26
7.11 Token carrier acceptor interface test . 26
8 Accuracy requirements . 26
9 Functional requirements . 27
9.1 General . 27
9.2 Robustness of meter accounting process . 27
10 Type test . 28
Annex A (informative) Functional performance . 30
A.1 Basic functionalities – prepayment mode . 30
A.1.1 General . 30
A.1.2 Prepayment mode – core functionalities . 30
A.1.3 Core functional tests within voltage and temperature range limits . 33
A.1.4 Functional tests within the limit range of operation with voltage . 34
A.1.5 Functional tests within the limit range of operation with temperature . 34
A.1.6 Prepayment mode – token handling and data integrity requirements . 35
A.2 Additional functionalities . 36
A.2.1 General . 36
A.2.2 Requirements for other modes of operation . 37
A.2.3 Collection of agreed debt . 37
A.2.4 Time-of-use tariff facilities . 37
A.3 System compliance requirements . 38
Annex B (informative) Reference model for a payment meter . 39
B.1 General . 39
B.2 Generalised payment meter instance . 40
B.3 Functions in a single-part payment meter . 42
B.3.1 General . 42
B.3.2 Meter application process . 42
B.3.3 Token_Carrier_to_Meter_Interface function . 42
B.3.4 Accounting function . 42
B.3.5 Metering function . 42
B.3.6 Delivery function . 43

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SIST EN IEC 62055-31:2022
– 4 – IEC 62055-31:2022 © IEC 2022
B.3.7 Time functions . 43
B.3.8 Test functions . 43
B.3.9 Display functions . 43
B.3.10 Recording functions . 44
B.3.11 Security functions . 44
Annex C (normative) Requirements for payment meters with supply control switches . 46
Annex D (normative) Requirements of timekeeping . 47
D.1 General . 47
D.1.1 General . 47
D.1.2 Real-time clock support facilities. 47
D.1.3 Operation reserve . 47
D.1.4 Primary batteries . 48
D.1.5 Back up battery replacement . 48
D.1.6 Real-time clock setting and synchronisation facilities . 48
D.2 Synchronous clocks . 48
D.3 Crystal-controlled clocks . 48
D.4 Tests of timekeeping accuracy . 49
D.4.1 General . 49
D.4.2 General test conditions . 49
D.4.3 Test of synchronous clocks in payment meters . 49
D.4.4 Test of crystal-controlled clocks in payment meters . 49
D.5 Effects of disturbances on timekeeping . 50
D.5.1 General . 50
D.5.2 Electromagnetic disturbances . 50
D.5.3 Voltage dips and short interruptions . 51
D.5.4 Harmonics in the voltage waveform . 52
Bibliography . 53

Figure B.1 – Generalised block diagram of a payment meter instance . 40

Table 1 – Voltage ranges . 21

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SIST EN IEC 62055-31:2022
IEC 62055-31:2022 © IEC 2022 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

ELECTRICITY METERING – PAYMENT SYSTEMS –

Part 31: Particular requirements –
Static payment meters for active energy (classes 0,5, 1 and 2)

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
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consensus of opinion on the relevant subjects since each technical committee has representation from all
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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
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6) All users should ensure that they have the latest edition of this publication.
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IEC 62055-31 has been prepared by IEC technical committee 13: Electrical energy
measurement and control. It is an International Standard.
This second edition cancels and replaces the first edition published in 2005. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) Title modified.
b) Removal of the contents of Annex C relating to the requirements for the supply control
switch, and added reference to IEC 62052-31:2015 which contains the relevant
requirements.

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SIST EN IEC 62055-31:2022
– 6 – IEC 62055-31:2022 © IEC 2022
The text of this International Standard is based on the following documents:
Draft Report on voting
13/1864/FDIS 13/1866/RVD

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.
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/standardsdev/publications.
A list of all parts in the IEC 62055 series, published under the general title Electricity metering
– Payment systems, 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,
• replaced by a revised edition, or
• amended.

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SIST EN IEC 62055-31:2022
IEC 62055-31:2022 © IEC 2022 – 7 –
INTRODUCTION
Payment meters are used in situations where the supply of electrical energy to the load may be
interrupted or its restoration enabled under the control of the payment meter in relation to a
payment tariff agreed between the customer and the supplier. The payment meter is part of a
system that uses token carriers to pass payment information as tokens between a vending
network and the payment meters that include the meter accounting process.
The primary reason for this edition is to align it with the requirements introduced in
IEC 62052‑31:2015 metering safety standard.
The functions of a payment meter are to measure electrical energy consumed and to decrement
the available credit value in accordance with the metered consumption, and possibly in
accordance with the passing of time. This available credit value is incremented as the result of
payments made to the electricity supplier, and the meter accounting process continuously
calculates the balance of available credit held by
...