Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 12: Power metering and monitoring devices (PMD) (IEC 61557-12:2018)

This part of IEC 61557 specifies requirements for power metering and monitoring devices
(PMD) that measure and monitor the electrical quantities within electrical distribution systems,
and optionally other external signals. These requirements also define the performance in
single- and three-phase AC or DC systems having rated voltages up to 1 000 V AC or up to
1 500 V DC.
These devices are fixed or portable. They are intended to be used indoors and/or outdoors.
Power metering and monitoring devices (PMD), as defined in this document, give additional
safety information, which aids the verification of the installation and enhances the
performance of the distribution systems.
The power metering and monitoring devices (PMD) for electrical parameters described in this
document are used for general industrial and commercial applications.
This document does not address functional safety and cyber security aspects.
This document is not applicable for:
– electricity metering equipment that complies with IEC 62053-21, IEC 62053-22,
IEC 62053-23 and IEC 62053-24. Nevertheless, uncertainties defined in this document for
active and reactive energy measurement are derived from those defined in IEC 62053 (all
parts);
– the measurement and monitoring of electrical parameters defined in IEC 61557-2 to
IEC 61557-9 and IEC 61557-13 or in IEC 62020;
– power quality instrument (PQI) according IEC 62586 (all parts);
– devices covered by IEC 60051 (all parts) (direct acting analogue electrical measuring
instrument).
NOTE 1 Generally such types of devices are used in the following applications or for the following general needs:
– energy management inside the installation, such as facilitating the implementation of documents such as
ISO 50001 and IEC 60364-8-1;
– monitoring and/or measurement of electrical parameters;
– measurement and/or monitoring of the quality of energy inside commercial/industrial installations.
NOTE 2 A measuring and monitoring device of electrical parameters usually consists of several functional
modules. All or some of the functional modules are combined in one device. Examples of functional modules are:
– measurement and monitoring of several electrical parameters simultaneously;
– energy measurement and/or monitoring, as well as sometimes compliance with aspects of building regulations;
– alarms functions;
– demand side quality (current and voltage harmonics, over/under voltages, voltage dips and swells, etc.).
NOTE 3 PMD are historically called power meter, power monitor, power monitor device, power energy monitoring
device, power analyser, multifunction meter, measuring multifunction equipment, energy meters.
NOTE 4 Metering, measuring and monitoring applications are explained in Annex A.

Elektrische Sicherheit in Niederspannungsnetzen bis AC 1 000 V und DC 1 500 V - Geräte zum Prüfen, Messen oder Überwachen von Schutzmaßnahmen - Teil 12: Geräte zur Energiemessung und -überwachung (PMD) (IEC 61557-12:2018)

Sécurité électrique dans les réseaux de distribution basse tension jusqu'à 1 000 V c.a. et 1 500 V c.c. - Dispositifs de contrôle, de mesure ou de surveillance de mesures de protection - Partie 12: Dispositifs de comptage et de surveillance du réseau électrique (PMD) (IEC 61557-12:2018)

IEC 61557-12:2018 est disponible sous forme de IEC 61557-12:2018 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.L'IEC 61557-12:2018 spécifie des exigences relatives aux dispositifs de comptage et de surveillance du réseau électrique (PMD) qui mesurent et surveillent les grandeurs électriques dans les réseaux de distribution électrique et, facultativement, d’autres signaux externes. Ces exigences définissent également les performances dans les réseaux alternatifs ou continus monophasés et triphasés ayant des tensions assignées inférieures ou égales à 1 000 V en courant alternatif ou inférieures ou égales à 1 500 V en courant continu. Ces dispositifs sont fixes ou portables. Ils sont destinés à être utilisés à l’intérieur et/ou à l’extérieur. Les dispositifs de comptage et de surveillance du réseau électrique (PMD) tels que définis dans le présent document donnent des informations supplémentaires sur la sécurité, ce qui facilite la vérification de l'installation et augmente les performances des réseaux de distribution. Les dispositifs de comptage et de surveillance du réseau électrique (PMD) relatifs aux paramètres électriques décrits dans le présent document sont utilisés pour des applications industrielles et commerciales générales. Le présent document ne traite pas des aspects liés à la sécurité fonctionnelle et à la cybersécurité. Le présent document n’est pas applicable: – aux appareils de comptage d’électricité conformes à l’IEC 62053-21, à l’IEC 62053-22, à l’IEC 62053-23 et à l’IEC 62053-24. Néanmoins, les incertitudes définies dans le présent document pour le mesurage de l’énergie active et réactive sont tirées de celles définies dans l'IEC 62053 (toutes les parties); – au mesurage et à la surveillance des paramètres électriques définis dans l'IEC 61557-2 à l'IEC 61557-9 et dans l'IEC 61557-13 ou dans l’IEC 62020; – aux instruments de qualité de l’alimentation (PQI – power quality instrument) conformes à l'IEC 62586 (toutes les parties); – aux dispositifs relevant des domaines d’application de l'IEC 60051 (toutes les parties) (appareils de mesure électriques analogique à action directe). L'IEC 61557-12:2018 annule et remplace la première édition parue en 2007. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: a) Suppression des PMD-A du fait que ces dispositifs sont à présent largement couverts par la série de normes IEC 62586. b) Création de trois catégories de PMD accompagnées d’une liste des fonctions minimales exigées pour chacune des catégories. c) Ajout d’une nouvelle Annexe A décrivant les différentes applications associées aux normes et dispositifs correspondants et d’une autre nouvelle Annexe C portant sur les conventions du facteur de puissance.

Električna varnost v nizkonapetostnih razdelilnih sistemih za izmenične napetosti do 1 kV in enosmerne napetosti do 1,5 kV - Oprema za preskušanje, merjenje ali nadzorovanje zaščitnih ukrepov - 12. del: Naprave za merjenje in nadzorovanje moči (PMD) (IEC 61557-12:2018)

Ta del standarda IEC 61557 določa zahteve za naprave za merjenje in nadzorovanje moči (PMD), ki se uporabljajo za merjenje in nadzorovanje električnih veličin v električnih razdelilnih sistemih, ter izbirno za druge zunanje signale. Te zahteve določajo tudi zmogljivost eno- in trifaznih izmeničnih ali enosmernih sistemov z nazivno napetostjo do 1000 V izmenične napetosti oziroma do 1500 V enosmerne napetosti.
Te naprave so fiksne ali prenosne. Namenjene so notranji in/ali zunanji uporabi.
Naprave za merjenje in nadzorovanje moči, kot so opredeljene v tem dokumentu, zagotavljajo dodatne varnostne informacije, ki so v pomoč pri preverjanju inštalacije ter izboljšajo zmogljivost razdelilnih sistemov.
Naprave za merjenje in nadzorovanje moči za električne parametre, opisane v tem dokumentu, se uporabljajo za splošne industrijske in komercialne namene.
Ta dokument ne obravnava vidikov funkcijske in kibernetske varnosti.
Ta dokument se ne uporablja za:
– opremo za merjenje električne energije, ki je skladna s standardi IEC 62053-21, IEC 62053-22, IEC 62053-23 in IEC 62053-24. Kljub temu negotovosti, opredeljene v tem dokumentu za merjenje aktivne in jalove energije, izhajajo iz tistih, ki so opredeljene v standardu IEC 62053 (vsi deli);
– merjenje in nadzorovanje električnih parametrov, opredeljenih v standardih od IEC 61557-2 do IEC 61557-9 in IEC 61557-13 ali v standardu IEC 62020;
– instrument za kakovost napajanja (PQI) v skladu s standardom IEC 62586 (vsi deli);
– naprave, zajete v standardu IEC 60051 (vsi deli) (neposredni analogni električni merilni
instrument).
OPOMBA 1: Takšne vrste naprav se na splošno uporabljajo za naslednje vrste uporabe ali za naslednje splošne potrebe:
– upravljanje energije znotraj inštalacije, npr. lažje izvajanje dokumentov, kot sta standarda ISO 50001 in IEC 60364-8-1;
– nadzorovanje in/ali merjenje električnih parametrov;
– merjenje in/ali nadzorovanje kakovosti energije znotraj komercialnih/industrijskih inštalacij.
OPOMBA 2: Naprava za merjenje in nadzorovanje električnih parametrov je običajno sestavljena iz več funkcijskih modulov. V eni napravi so združeni vsi ali samo nekateri funkcijski moduli. Primeri funkcijskih modulov:
– sočasno merjenje in nadzorovanje različnih električnih parametrov;
– merjenje in/ali nadzorovanje energije ter včasih tudi skladnost z vidiki gradbenih predpisov;
– funkcije alarma;
– kakovost na strani povpraševanja (tokovna in napetostna skladnost, previsoka/prenizka napetost, napetostni upadi in udari itd.).
OPOMBA 3: Naprave za merjenje in nadzorovanje moči se zgodovinsko imenujejo merilnik moči, električni monitor, električna nadzorna naprava, analizator moči, večfunkcijski merilnik, večfunkcijska oprema za merjenje, števec energije.
OPOMBA 4: Aplikacije v zvezi s števci ter aplikacije merjenja in nadzorovanja so pojasnjene v dodatku A.

General Information

Status
Published
Publication Date
01-Feb-2022
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
13-Jan-2022
Due Date
20-Mar-2022
Completion Date
02-Feb-2022

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SLOVENSKI STANDARD
SIST EN IEC 61557-12:2022
01-marec-2022
Nadomešča:
SIST EN 61557-12:2008

Električna varnost v nizkonapetostnih razdelilnih sistemih za izmenične napetosti

do 1 kV in enosmerne napetosti do 1,5 kV - Oprema za preskušanje, merjenje ali
nadzorovanje zaščitnih ukrepov - 12. del: Naprave za merjenje in nadzorovanje
moči (PMD) (IEC 61557-12:2018)

Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. -

Equipment for testing, measuring or monitoring of protective measures - Part 12: Power

metering and monitoring devices (PMD) (IEC 61557-12:2018)
Elektrische Sicherheit in Niederspannungsnetzen bis AC 1 000 V und DC 1 500 V -
Geräte zum Prüfen, Messen oder Überwachen von Schutzmaßnahmen - Teil 12: Geräte
zur Energiemessung und -überwachung (PMD) (IEC 61557-12:2018)

Sécurité électrique dans les réseaux de distribution basse tension jusqu'à 1 000 V c.a. et

1 500 V c.c. - Dispositifs de contrôle, de mesure ou de surveillance de mesures de

protection - Partie 12: Dispositifs de comptage et de surveillance du réseau électrique

(PMD) (IEC 61557-12:2018)
Ta slovenski standard je istoveten z: EN IEC 61557-12:2022
ICS:
17.220.20 Merjenje električnih in Measurement of electrical
magnetnih veličin and magnetic quantities
29.080.01 Električna izolacija na Electrical insulation in
splošno general
29.240.01 Omrežja za prenos in Power transmission and
distribucijo električne energije distribution networks in
na splošno general
SIST EN IEC 61557-12:2022 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN IEC 61557-12:2022
---------------------- Page: 2 ----------------------
SIST EN IEC 61557-12:2022
EUROPEAN STANDARD EN IEC 61557-12
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2022
ICS 17.220.20; 29.080.01; 29.240.01 Supersedes EN 61557-12:2008 and all of its
amendments and corrigenda (if any)
English Version
Electrical safety in low voltage distribution systems up to 1 000 V
AC and 1 500 V DC - Equipment for testing, measuring or
monitoring of protective measures - Part 12: Power metering and
monitoring devices (PMD)
(IEC 61557-12:2018)

Sécurité électrique dans les réseaux de distribution basse Elektrische Sicherheit in Niederspannungsnetzen bis AC 1

tension jusqu'à 1 000 V c.a. et 1 500 V c.c. - Dispositifs de 000 V und DC 1 500 V - Geräte zum Prüfen, Messen oder

contrôle, de mesure ou de surveillance de mesures de Überwachen von Schutzmaßnahmen - Teil 12: Geräte zur

protection - Partie 12: Dispositifs de comptage et de Energiemessung und -überwachung (PMD)

surveillance du réseau électrique (PMD) (IEC 61557-12:2018)
(IEC 61557-12:2018)

This European Standard was approved by CENELEC on 2021-11-10. 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

© 2022 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 61557-12:2022 E
---------------------- Page: 3 ----------------------
SIST EN IEC 61557-12:2022
EN IEC 61557-12:2022 (E)
European foreword

The text of document 85/644/FDIS, future edition 2 of IEC 61557-12, prepared by IEC/TC 85

"Measuring equipment for electrical and electromagnetic quantities" was submitted to the IEC-

CENELEC parallel vote and approved by CENELEC as EN IEC 61557-12:2022.
The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2022-08-10

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2026-11-10

document have to be withdrawn

This document supersedes EN 61557-12:2008 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 Standardization Request given to CENELEC by the

European Commission and the European Free Trade Association, and supports essential

requirements of EU Directive(s) / Regulation(s).

For the relationship with EU Directive(s) / Regulation(s), see informative Annex ZZ, which is an

integral part of this document.

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 61557-12:2018 was approved by CENELEC as a European

Standard without any modification.

In the official version, for Bibliography, the following notes have to be added for the standards

indicated:
IEC 60044-7:1999 NOTE Harmonized as EN 60044-7:2000 (not modified)
IEC 60044-8:2002 NOTE Harmonized as EN 60044-8:2002 (not modified)
IEC 60051 (series) NOTE Harmonized as EN IEC 60051 (series)
IEC 60071-1:2006 NOTE Harmonized as EN 60071-1:2006 (not modified)
IEC 60359:2001 NOTE Harmonized as EN 60359:2002 (not modified)
IEC 60364-6 NOTE Harmonized as HD 60364-6
IEC 60364-8-1 NOTE Harmonized as HD 60364-8-1
IEC 61000-4-5 NOTE Harmonized as EN 61000-4-5
IEC 61000-4-7:2002 NOTE Harmonized as EN 61000-4-7:2002 (not modified)
---------------------- Page: 4 ----------------------
SIST EN IEC 61557-12:2022
EN IEC 61557-12:2022 (E)
IEC 61000-4-15 NOTE Harmonized as EN 61000-4-15
IEC 61010-2-030 NOTE Harmonized as EN IEC 61010-2-030
IEC 61010-2-031 NOTE Harmonized as EN 61010-2-031
IEC 61010-2-032 NOTE Harmonized as EN IEC 61010-2-032
IEC 61140:2001 NOTE Harmonized as EN 61140:2002 (not modified)
IEC 61557-2:2007 NOTE Harmonized as EN 61557-2:2007 (not modified)
IEC 61557-3:2007 NOTE Harmonized as EN 61557-3:2007 (not modified)
IEC 61557-4:2007 NOTE Harmonized as EN 61557-4:2007 (not modified)
IEC 61557-5:2007 NOTE Harmonized as EN 61557-5:2007 (not modified)
IEC 61557-7:2007 NOTE Harmonized as EN 61557-7:2007 (not modified)
IEC 61557-8:2014 NOTE Harmonized as EN 61557-8:2015 (not modified)
IEC 61557-9:2014 NOTE Harmonized as EN 61557-9:2015 (not modified)
IEC 61557-13:2011 NOTE Harmonized as EN 61557-13:2011 (not modified)
IEC 61869-2:2012 NOTE Harmonized as EN 61869-2:2012 (not modified)
IEC 61869-3:2011 NOTE Harmonized as EN 61869-3:2011 (not modified)
IEC 62020 NOTE Harmonized as EN 62020
IEC 62052-11:2003 NOTE Harmonized as EN 62052-11:2003 (not modified)
IEC 62053 (series) NOTE Harmonized as EN 62053 (series)
IEC 62053-21:2003 NOTE Harmonized as EN 62053-21:2003 (not modified)
IEC 62053-22:2003 NOTE Harmonized as EN 62053-22:2003 (not modified)
IEC 62053-23:2003 NOTE Harmonized as EN 62053-23:2003 (not modified)
IEC 62053-24:2014 NOTE Harmonized as EN 62053-24:2015 (not modified)
IEC 62586 (series) NOTE Harmonized as EN 62586-2:2017/A1 (series)
IEC 62586-1 NOTE Harmonized as EN 62586-1
ISO 50001 NOTE Harmonized as EN ISO 50001
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SIST EN IEC 61557-12:2022
EN IEC 61557-12:2022 (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 60068-2-1 - Environmental testing - Part 2-1: Tests - EN 60068-2-1 -
Test A: Cold
IEC 60068-2-2 - Environmental testing - Part 2-2: Tests - EN 60068-2-2 -
Test B: Dry heat
IEC 60068-2-30 - Environmental testing - Part 2-30: Tests - EN 60068-2-30 -
Test Db: Damp heat, cyclic (12 h + 12 h
cycle)
IEC 60529 - Degrees of protection provided by - -
enclosures (IP Code)

IEC 61000-4-30 2015 Electromagnetic compatibility (EMC) - Part EN 61000-4-30 2015

4-30: Testing and measurement techniques
- Power quality measurement methods
IEC 61010-1 2010 Safety requirements for electrical equipment EN 61010-1 2010
for measurement, control, and laboratory
use - Part 1: General requirements
+ A1 (mod) 2016 + A1 2019

IEC 61010-2-030 2017 Safety requirements for electrical equipment EN IEC 61010-2-030 2021

for measurement, control, and laboratory
use - Part 2-030: Particular requirements for
equipment having testing or measuring
circuits
- - + A11 2021
IEC 61326-1 2012 Electrical equipment for measurement, EN 61326-1 2013
control and laboratory use - EMC
requirements - Part 1: General requirements
IEC 62053-31 1998 Electricity metering equipment (a.c.) - EN 62053-31 1998
Particular requirements - Part 31: Pulse
output devices for electromechanical and
electronic meters (two wires only)
---------------------- Page: 6 ----------------------
SIST EN IEC 61557-12:2022
EN IEC 61557-12:2022 (E)
Annex ZZ
(informative)
Relationship between this European standard and the safety
objectives of Directive 2014/35/EU [2014 OJ L96] aimed to be
covered

This European Standard has been prepared under a Commission’s standardization request relating to

harmonized standards in the field of the Low Voltage Directive, M/511, to provide one voluntary means

of conforming to safety objectives of Directive 2014/35/EU of the European Parliament and of the

Council of 26 February 2014 on the harmonization of the laws of the Member States relating to the

making available on the market of electrical equipment designed for use within certain voltage limits

[2014 OJ L96].

Once this standard is cited in the Official Journal of the European Union under that Directive,

compliance with the normative clauses of this standard given in Table ZZ.1 confers, within the limits of

the scope of this standard, a presumption of conformity with the corresponding safety objectives of

that Directive, and associated EFTA regulations.

Table ZZ.1 — Correspondence between this European standard and Annex I of Directive

2014/35/EU [2014 OJ L96]
Safety objectives of Directive Clause(s) / subclause(s) of Remarks / Notes
2014/35/EU (Annex I) this EN
1. General conditions
1 (a) the essential characteristics, 1; 2; 3; 4; 5; 6
the recognition and observance of
which will ensure that electrical
equipment will be used safely and in
applications for which it was made,
shall be marked on the electrical
equipment, or, if this is not possible,
on an accompanying document
1 (b) the electrical equipment, 1; 2; 3; 4; 5; 6
together with its component parts,
shall be made in such a way as to
ensure that it can be safely and
properly assembled and connected
1 (c) the electrical equipment shall Same as those covering
be so designed and manufactured as safety objectives 2 a) to 2 d)
to ensure that protection against the and 3 a) to 3 c) in addition to
hazards set out in points 2 and 3 is the clauses 1; 3; 4
assured, providing that the
equipment is used in applications for
which it was made and is adequately
maintained
2. Protection against hazards arising from the electrical equipment

Measures of a technical nature shall be laid down in accordance with point 1, in order to ensure that:

2 (a) persons and domestic animals 4.9; 4.10; 6.1; 6.2; 6.3
are adequately protected against the
danger of physical injury or other
harm which might be caused by
direct or indirect contact
---------------------- Page: 7 ----------------------
SIST EN IEC 61557-12:2022
EN IEC 61557-12:2022 (E)
2 (b) temperatures, arcs or radiation 4.9; 4.10; 6.1; 6.2; 6.3
which would cause a danger, are not
produced
2 (c) persons, domestic animals and 4.9; 4.10; 6.1; 6.2; 6.3
property are adequately protected
against non-electrical dangers
caused by the electrical equipment
which are revealed by experience
2 (d) the insulation is suitable for 4.9; 4.10; 6.1; 6.2; 6.3
foreseeable conditions

3. Protection against hazards which may be caused by external influences on the electrical

equipment

Technical measures shall be laid down in accordance with point 1, in order to ensure that the electrical

equipment:
3 (a) meets the expected mechanical 4.9; 4.10; 6.1; 6.2; 6.3
requirements in such a way that
persons, domestic animals and
property are not endangered
3 (b) is resistant to non-mechanical 4.9; 4.10; 6.1; 6.2; 6.3
influences in expected environmental
conditions, in such a way that
persons, domestic animals and
property are not endangered
3 (c) does not endanger persons, 4.10; 5.2; 5.3; 6.1; 6.2; 6.3
domestic animals and property in
foreseeable conditions of overload

WARNING 1 — Presumption of conformity stays valid only as long as a reference to this European

standard is maintained in the list published in the Official Journal of the European Union. Users of this

standard should consult frequently the latest list published in the Official Journal of the European

Union.

WARNING 2 — Other Union legislation may be applicable to the product(s) falling within the scope of

this standard.
---------------------- Page: 8 ----------------------
SIST EN IEC 61557-12:2022
IEC 61557-12
Edition 2.0 2018-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electrical safety in low voltage distribution systems up to 1 000 V AC and
1 500 V DC. – Equipment for testing, measuring or monitoring of protective
measures –
Part 12: Power metering and monitoring devices (PMD)
Sécurité électrique dans les réseaux de distribution basse tension jusqu’à
1 000 V c.a. et 1 500 V c.c. – Dispositifs de contrôle, de mesure ou de
surveillance de mesures de protection –
Partie 12: Dispositifs de comptage et de surveillance du réseau électrique (PMD)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220.20; 29.080.01; 29.240.01 ISBN 978-2-8322-6077-7

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: 9 ----------------------
SIST EN IEC 61557-12:2022
– 2 – IEC 61557-12:2018 © IEC 2018
CONTENTS

FOREWORD ......................................................................................................................... 7

INTRODUCTION ................................................................................................................... 9

1 Scope .......................................................................................................................... 10

2 Normative references................................................................................................... 11

3 Terms, definitions and notations................................................................................... 11

3.1 General definitions .............................................................................................. 11

3.2 Definitions related to uncertainty and performance ............................................... 13

3.3 Definitions related to electric phenomena ............................................................ 17

3.4 Definitions related to measurement techniques .................................................... 20

3.5 Notations ............................................................................................................ 21

3.5.1 Functions ..................................................................................................... 21

3.5.2 Symbols and abbreviations ........................................................................... 21

3.5.3 Indices ......................................................................................................... 22

4 Requirements .............................................................................................................. 22

4.1 General requirements .......................................................................................... 22

4.2 PMD general architecture .................................................................................... 22

4.3 Classification of PMD .......................................................................................... 23

4.4 Structure of PMD................................................................................................. 24

4.4.1 Structure of PMD related to sensors ............................................................. 24

4.4.2 Requirements for self-powered PMD ............................................................ 24

4.5 List of applicable performance classes ................................................................. 25

4.6 Operating and reference conditions for PMD ........................................................ 25

4.6.1 Reference conditions ................................................................................... 25

4.6.2 Rated operating conditions ........................................................................... 26

4.7 Start-up conditions .............................................................................................. 28

4.8 Requirements for PMD functions ......................................................................... 28

4.8.1 General requirements ................................................................................... 28

4.8.2 Active power (P) and active energy (E ) measurements ................................ 29

4.8.3 Reactive power (Q , Q ) and reactive energy (E , E ) measurements ....... 35

A V rA rV
4.8.4 Apparent power (S , S ) and apparent energy (E , E )
A V apA apV

measurements ............................................................................................. 38

4.8.5 Frequency (f) measurements ........................................................................ 40

4.8.6 RMS phase current (I) and neutral current (I , I ) measurements .............. 41

N Nc

4.8.7 RMS voltage (U) measurements ................................................................... 45

4.8.8 Power factor (PF , PF ) measurements ....................................................... 47

A V

4.8.9 Short term flicker (P ) and long term flicker (P ) measurements ................... 47

st lt

4.8.10 Voltage dip (U ) and voltage swell (U ) measurements ........................... 48

dip swl

4.8.11 Voltage interruption (U ) measurements ..................................................... 53

int

4.8.12 Transient overvoltage (U ) measurements ................................................... 54

4.8.13 Voltage unbalance (U , U ) measurements ............................................ 54

nb nba
4.8.14 Voltage harmonics (U ) and voltage THD (THD and THD-R )
h u u

measurements ............................................................................................. 55

4.8.15 Current unbalance (I , I ) measurements ............................................... 56

nb nba
4.8.16 Current harmonics (I ) and current THD (THD and THD-R )
h i i

measurements ............................................................................................. 57

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SIST EN IEC 61557-12:2022
IEC 61557-12:2018 © IEC 2018 – 3 –
4.8.17 Minimum, maximum, peak, three-phases average and demand

measurements ............................................................................................. 58

4.9 General mechanical requirements ........................................................................ 58

4.9.1 Vibration requirements ................................................................................. 58

4.9.2 IP requirements ........................................................................................... 58

4.10 Safety requirements ............................................................................................ 59

4.10.1 Protection against electrical hazards ............................................................ 59

4.10.2 Protection against mechanical hazards ......................................................... 60

4.10.3 Protection against other hazards .................................................................. 60

4.11 EMC requirements .............................................................................................. 60

4.11.1 Immunity ...................................................................................................... 60

4.11.2 Emission ...................................................................................................... 60

4.12 Inputs and/or outputs .......................................................................................... 60

4.12.1 General ....................................................................................................... 60

4.12.2 Analog outputs ............................................................................................. 60

4.12.3 Pulse outputs ............................................................................................... 61

4.12.4 Control outputs ............................................................................................ 61

4.12.5 Analog inputs ............................................................................................... 61

4.12.6 Pulse and control inputs ............................................................................... 61

5 Marking and operating instructions ............................................................................... 61

5.1 General ............................................................................................................... 61

5.2 Marking ............................................................................................................... 61

5.3 Operating, installation and maintenance instructions ............................................ 62

5.3.1 General ....................................................................................................... 62

5.3.2 General characteristics ................................................................................ 62

5.3.3 Essential characteristics ............................................................................... 62

6 Tests ........................................................................................................................... 64

6.1 General ............................................................................................................... 64

6.2 Type tests of PMD ............................................................................................... 65

6.2.1 General ....................................................................................................... 65

6.2.2 Tests of intrinsic uncertainty ......................................................................... 65

6.2.3 Tests of variation of uncertainty with influence quantities .............................. 65

6.2.4 Test of temperature influence ....................................................................... 65

6.2.5 Active power ................................................................................................ 66

6.2.6 Apparent power ............................................................................................ 68

6.2.7 Power factor ................................................................................................ 69

6.2.8 Common mode voltage rejection test ............................................................ 69

6.2.9 Frequency.................................................................................................... 69

6.2.10 Measurement of voltage harmonics and THD .............................................. 70

6.2.11 Measurement of current harmonics and THD ................................................ 70

6.2.12 Dips and swells ............................................................................................ 71

6.2.13 Voltage interruptions .................................................................................... 71

6.2.14 Outputs tests ............................................................................................... 71

6.2.15 Climatic tests ............................................................................................... 72

6.2.16 EMC tests .................................................................................................... 73

6.2.17 Start-up tests ............................................................................................... 73

6.2.18 Gapless measurement test ........................................................................... 73

6.2.19 Safety tests .................................................................................................. 73

6.3 Routine tests ....................................................................................................... 73

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SIST EN IEC 61557-12:2022
– 4 – IEC 61557-12:2018 © IEC 2018

6.3.1 Protective bonding test ................................................................................. 73

6.3.2 Dielectric strength test ................................................................................. 74

6.3.3 Uncertainty test ............................................................................................ 74

Annex A (informative) Metering, measuring and monitoring applications .............................. 75

A.1 Applications on demand side and supply side ...................................................... 75

A.2 Link between applications, devices and standards ............................................... 75

Annex B (informative) Definitions of electrical parameters ................................................... 77

B.1 General ............................................................................................................... 77

B.2 Definitions in the presence of a neutral ................................................................ 77

B.3 Power measurement in three-phase three-wire systems using the two-

wattmeter method ............................................................................................... 81

B.3.1 General ....................................................................................................... 81

B.3.2 Total active power ........................................................................................ 82

B.3.3 Total vector reactive power using quadrature phase shift definition ............... 82

B.3.4 Total vector reactive power using Budeanu’s definition ................................. 83

B.4 Additional relationships in case of sinusoidal voltage ........................................... 83

Annex C (informative) Convention about the sign of the power factor .................................. 84

C.1 General ............................................................................................................... 84

C.2 Convention for power factor (consumer perspective) ............................................ 84

C.3 Convention for power factor (producer reference frame) ....................................... 85

Annex D (normative) Definitions of minimum, maximum, peak and demand values .............. 87

D.1 Demand quantities .............................................................................................. 87

D.1.1 General ....................................................................................................... 87

D.1.2 Power demand ............................................................................................. 87

D.1.3 Current demand ........................................................................................... 87

D.1.4 Thermal current demand (or bi-metal curren
...

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