IEC 62052-11:2020
(Main)Electricity metering equipment - General requirements, tests and test conditions - Part 11: Metering equipment
Electricity metering equipment - General requirements, tests and test conditions - Part 11: Metering equipment
IEC 62052-11:2020 specifies requirements and associated tests, with their appropriate conditions for type testing of AC and DC electricity meters. This document details functional, mechanical, electrical and marking requirements, test methods, and test conditions, including immunity to external influences covering electromagnetic and climatic environments.
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, or 1 500 V DC;
• have all functional elements, including add-on modules, enclosed in, or forming a single meter case with exception of indicating displays;
• operate with integrated displays (electromechanical or static meters);
• operate with detached indicating displays, or without an indicating display (static meters only);
• be installed in a specified matching sockets or racks;
• 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 tested for compliance with this document and the relevant IEC 62053 series documents only if such meters and their LPITs are tested together as directly connected meters.
This document is also applicable to auxiliary input and output circuits, operation indicators, and test outputs of equipment for electrical energy measurement.
This document also covers the common aspects of accuracy testing such as reference conditions, repeatability and measurement of uncertainty.
This document does not apply to:
• meters for which the voltage line-to-neutral derived from nominal voltages exceeds 1 000 V AC, or 1 500 V DC;
• meters intended for connection with low power instrument transformers (LPITs as defined in the IEC 61869 series of standards) when tested without such transformers;
• metering systems comprising multiple devices (except of 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 2003, 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:
a) Removed all meter safety requirements; the meter safety requirements are covered in IEC 62052-31:2015;
b) Included requirements for meter power consumption and voltage requirements from IEC 62053-61; IEC 62053-61 is withdrawn;
c) Included requirements for meter symbols from IEC 62053-52; IEC 62053-52 is withdrawn;
d) Included requirements for meter pulse output devices from IEC 62053-31; IEC 62053-31 is withdrawn;
e) Added new requirements and tests including: meters with detached indicating displays, and meters without indicating displays, meter sealing provisions; measurement uncertainty and repeatability; time-keeping accuracy; type test report
f) Updated and clarified acceptance criteria for testing of external influences;
g) Revised and updated tests for immunity to electromagnetic influences and disturbances as per the latest editions of the basic EMC publications.
Équipement de comptage de l'électricité - Exigences générales, essais et conditions d'essai - Partie 11: Équipement de comptage
IEC 62052-11:2020 spécifie les exigences et essais correspondants, ainsi que leurs conditions appro-priées, pour les essais de type des compteurs d'électricité en courant alternatif et en courant continu. Le présent document décrit les exigences fonctionnelles, mécaniques, électriques et de marquage, les méthodes d'essai et les conditions d'essai, y compris en ce qui concerne l'immunité aux influences externes, couvrant les environnements électromagnétiques et climatiques.
Le présent document s'applique aux équipements de comptage de l'électricité conçus pour:
• mesurer et piloter l'énergie électrique sur les réseaux électriques (secteur) de tension jusqu'à 1 000 V en courant alternatif ou 1 500 V en courant continu;
• avoir tous les éléments fonctionnels, y compris les modules complémentaires, incorporés dans ou formant un boîtier de compteur unique, à l'exception des af-ficheurs;
• fonctionner avec des afficheurs intégrés (compteurs électromécaniques ou sta-tiques);
• fonctionner avec des afficheurs séparés ou sans afficheur (compteurs sta-tiques);
• être installés dans une embase ou un bâti correspondant spécifié;
• assurer, en option, 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 Transformer, définis dans la série IEC 61869) ne peuvent être soumis à des essais de conformité au présent document et aux docu-ments pertinents de la série IEC 62053 que si ces compteurs et leurs LPIT sont soumis à l'essai ensemble comme des compteurs à branchement direct.
Le présent document ne s'applique pas:
• aux compteurs dont la tension phase-neutre déduite des tensions nominales dé-passe 1 000 V en courant alternatif ou 1 500 V en courant continu;
• aux compteurs destinés à être connectés à des transformateurs de mesure de faible puissance (LPIT, définis dans la série de normes IEC 61869) lorsqu'ils sont soumis à l'essai sans ces transformateurs;
• aux systèmes de comptage comprenant plusieurs dispositifs (sauf des LPIT) physi-quement 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 ten-tatives frauduleuses visant à compromettre les performances du compteur (falsification)
Cette deuxième édition annule et remplace la première édition parue en 2003, ainsi que 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 Annex O.
General Information
Relations
Standards Content (Sample)
IEC 62052-11 ®
Edition 2.0 2020-06
INTERNATIONAL
STANDARD
Electricity metering equipment – General requirements, tests and test
conditions –
Part 11: Metering equipment
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IEC 62052-11 ®
Edition 2.0 2020-06
INTERNATIONAL
STANDARD
Electricity metering equipment – General requirements, tests and test
conditions –
Part 11: Metering equipment
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 17.220.20 ISBN 978-2-8322-8437-7
– 2 – IEC 62052-11:2020 © IEC 2020
CONTENTS
FOREWORD . 8
INTRODUCTION . 10
1 Scope . 13
2 Normative references . 14
3 Terms and definitions . 17
3.1 General definitions . 17
3.2 Definitions related to the functional elements . 21
3.3 Definitions of meter ports . 24
3.4 Definitions of mechanical elements . 25
3.5 Definitions related to measurements . 27
3.6 Definitions related to external influences . 30
3.7 Definition of tests . 33
3.8 Definitions related to electromechanical meters . 33
3.9 Definitions related to meter marking and symbols . 34
4 Nominal electrical values . 35
4.1 Voltages . 35
4.1.1 Nominal voltages . 35
4.1.2 Voltage ranges . 36
4.2 Currents . 36
4.2.1 Nominal currents . 36
4.2.2 Starting current . 36
4.2.3 Minimum current . 36
4.2.4 Maximum current . 37
4.2.5 Current ranges . 37
4.3 Frequencies . 37
4.3.1 Nominal frequencies . 37
4.3.2 Frequency ranges . 37
4.4 Power consumption . 37
5 Construction requirements . 39
5.1 General . 39
5.2 Mechanical tests . 39
5.2.1 Shock test . 39
5.2.2 Vibration test . 40
5.3 Window . 40
5.4 Terminals – Terminal block(s) – Protective conductor terminal . 40
5.5 Sealing provisions . 40
5.5.1 General . 40
5.5.2 Meter case . 40
5.5.3 Meter terminals . 41
5.5.4 Sealing of detached indicating displays . 41
5.5.5 Sealing of LPIT connections . 41
5.5.6 Sealing of meter configuration . 42
5.6 Display of measured values . 42
5.6.1 General . 42
5.6.2 Meters without indicating displays. 42
5.6.3 Meters with indicating displays . 42
5.7 Storage of measured values . 43
5.8 Pulse outputs . 43
5.8.1 General . 43
5.8.2 Optical test output . 43
5.8.3 Electrical pulse output . 45
5.8.4 Operation indicator . 45
5.9 Electrical pulse inputs . 46
5.9.1 General characteristics . 46
5.9.2 Functional tests of electrical pulse inputs . 46
5.10 Auxiliary power supply . 46
6 Meter marking and documentation . 47
6.1 Meter accuracy class marking . 47
6.2 Meter marking . 47
6.3 Connection diagrams and terminal marking . 51
6.4 Symbols . 51
6.4.1 General . 51
6.4.2 Symbols for the measuring elements . 52
6.4.3 Symbols for transformer-operated meters . 52
6.4.4 Identification of the displayed information . 52
6.4.5 Marking of the measured quantity . 53
6.4.6 Symbols of principal units used for meters (see Table 8) . 53
6.4.7 Symbols for auxiliary devices . 54
6.4.8 Symbols for details of the suspension of the moving element . 54
6.4.9 Symbols for communication ports . 54
6.5 Documentation . 54
6.5.1 Installation manuals . 54
6.5.2 Instruction for use . 54
7 Metrological performance requirements and tests . 54
7.1 General test conditions . 54
7.2 Methods of accuracy verification . 56
7.3 Measurement uncertainty . 56
7.4 Meter constant . 57
7.5 Initial start-up of the meter . 57
7.6 Test of no-load condition . 58
7.7 Starting current test . 58
7.8 Repeatability test . 59
7.9 Limits of error due to variation of the current . 59
7.10 Limits of error due to influence quantities . 60
7.11 Time-keeping accuracy . 60
8 Climatic requirements . 60
8.1 General . 60
8.2 Environmental conditions . 60
8.3 Tests of the effects of the climatic environments . 60
8.3.1 General test requirements . 60
8.3.2 Acceptance criteria . 61
8.3.3 Dry heat test . 61
8.3.4 Cold test . 61
8.3.5 Damp heat cyclic test . 61
8.3.6 Protection against solar radiation . 62
– 4 – IEC 62052-11:2020 © IEC 2020
8.4 Durability . 62
9 The effects of external influence quantities and disturbances . 62
9.1 General . 62
9.2 Acceptance criteria . 64
9.3 Electromagnetic compatibility (EMC) . 65
9.3.1 General . 65
9.3.2 Voltage dips and short interruptions . 67
9.3.3 Electrostatic discharge immunity test . 69
9.3.4 Radiated, radio-frequency, electromagnetic field immunity test – test
without current . 69
9.3.5 Radiated, radio-frequency, electromagnetic field immunity test – test
with current. 70
9.3.6 Electrical fast transient/burst immunity test . 70
9.3.7 Immunity to conducted disturbances, induced by radio-frequency fields . 71
9.3.8 Test for immunity to conducted, differential mode disturbances and
signalling in the frequency range 2 kHz to 150 kHz at AC power ports . 71
9.3.9 Surge immunity test . 72
9.3.10 Ring wave immunity test . 74
9.3.11 Damped oscillatory wave immunity test . 74
9.3.12 External static magnetic fields . 75
9.3.13 Power frequency magnetic field immunity test . 76
9.3.14 Emission requirements . 76
9.4 Tests of immunity to other influence quantities . 77
9.4.1 General . 77
9.4.2 Harmonics in the current and voltage circuits . 77
9.4.3 Voltage variation . 78
9.4.4 Ambient temperature variation . 79
9.4.5 Interruption of phase voltage . 79
9.4.6 Frequency variation . 80
9.4.7 Reversed phase sequence . 80
9.4.8 Auxiliary voltage variation . 80
9.4.9 Operation of auxiliary devices . 81
9.4.10 Short-time overcurrents . 81
9.4.11 Self-heating . 82
9.4.12 Fast load current variations . 82
9.4.13 Earth fault . 83
10 Type test . 83
10.1 Test conditions . 83
10.2 Type test report . 84
Annex A (normative) Optical test output . 85
Annex B (normative) Class A and class B electrical pulse outputs . 86
B.1 Electrical characteristics of pulse output . 86
B.2 Electrical output pulse waveform . 87
B.3 Test of electrical pulse output . 87
B.4 Test of pulse input . 87
Annex C (normative) Electrical pulse output for special applications and long
distances according to IEC 60381-1:1982 . 89
C.1 Specified operating conditions and output pulse waveform . 89
C.2 Test of pulse output . 90
C.3 Test of pulse input . 91
Annex D (informative) Meter symbols and markings . 92
Annex E (informative) Meter ports . 97
Annex F (informative) Test set-up for EMC tests . 100
Annex G (informative) Test for immunity to conducted, differential mode disturbances
and signalling in the frequency range 2 kHz to 150 kHz at AC power ports . 102
Annex H (normative) Test circuit diagrams for testing influence of harmonics and
interharmonics . 103
Annex I (informative) Short time overcurrent test waveform . 109
Annex J (informative) Fast load current variation test . 110
Annex K (normative) Electromagnet for testing the influence of externally produced
magnetic fields. 111
K.1 Permanent magnet for testing the influence of external static magnetic field . 111
K.2 Electromagnet for testing the influence of external static magnetic field with
magneto-motive force of 1 000 At (ampere-turns) (see Figure K.1) . 111
Annex L (normative) Test circuit diagram for the test of immunity to earth fault . 113
Annex M (informative) Meter current range . 114
Annex N (informative) Application to Branch Circuit Power Meters . 115
N.1 Overview. 115
N.2 Definitions. 115
N.3 General . 115
N.4 Cross-channel influences . 116
N.5 Channel configuration and sealing for multi-branch meters . 116
N.6 Verification for multi-branch meters . 116
Annex O (informative) Overview of the technical changes . 117
Annex P (informative) Test schedule – Recommended test sequences . 118
Figure A.1 – Test arrangement for the test output . 85
Figure A.2 – Waveform of the optical test output . 85
Figure B.1 – Physical interface of the electrical pulse output . 86
Figure B.2 – Electrical output pulse waveform . 87
Figure B.3 – Pulse output test set-up . 87
Figure B.4 – Pulse input test set-up . 88
Figure C.1 – Output pulse waveform . 90
Figure C.2 – Pulse output test set-up . 90
Figure C.3 – Pulse input test set-up . 91
Figure E.1 – Typical port configuration of a directly connected meter (example) . 97
Figure E.2 – Typical port configuration of a transformer operated meter (example) . 98
Figure E.3 – Typical port configuration of a LPIT operated meter with a detached
indicating display (example) . 98
Figure F.1 – Test set-up for the electrical fast transient/burst immunity test for
transformer oper-ated meters: each port (Mains, CT, HLV, ELV) is tested separately by
adding the coupling device to the respective port . 100
Figure F.2 – Test set-up for the electrical fast transient/burst immunity test for directly
connected meters: each port (Mains, HLV, ELV) is tested separately by adding the
coupling device to the respective port . 101
– 6 – IEC 62052-11:2020 © IEC 2020
Figure G.1 – Example of a test set-up for immunity to conducted, differential mode
disturbances and signalling in the frequency range 2 kHz to 150 kHz at AC power ports
(from IEC 61000-4-19: 2014) . 102
Figure H.1 – Test circuit diagram (informative, test of influence of interharmonics and
odd harmonics) . 103
Figure H.2 – Burst fired wave-form (interharmonics) . 104
Figure H.3 – Informative distribution of interharmonic content of burst-fired waveform
(the Fourier analysis is not complete) . 104
Figure H.4 – Phase fired waveform (odd harmonics) – 90° fired waveform . 105
Figure H.5 – Informative distribution of harmonic content of 90° phase fired waveform
(the Fourier analysis is not complete) . 105
Figure H.6 – Phase fired waveform (odd harmonics) – 45° fired waveform . 106
Figure H.7 – Phase fired waveform (odd harmonics) – 135° fired waveform . 106
Figure H.8 – Test circuit diagram for half-wave rectification (DC and even harmonics) . 107
Figure H.9 – Half-wave rectified waveform (DC and even harmonics) . 107
Figure H.10 – Informative distribution of harmonic content of half-wave rectified
waveform (the Fourier analysis is not complete) . 108
Figure K.1 – Electromagnet for testing the influence of external static magnetic field
with magneto-motive force of 1 000 At (ampere-turns) . 112
Figure L.1 – Circuit to simulate earth fault condition in phase 1 . 113
Figure L.2 – Voltages at the meter under test . 113
Figure M.1 – Meter current range . 114
Table 1 – Nominal voltages . 35
Table 2 – Voltage ranges . 36
Table 3 – Preferred values of nominal currents . 36
Table 4 – Current ranges . 37
Table 5 – Frequency ranges . 37
Table 6 – Maximum power consumption. 38
Table 7 – Marking and documentation requirements . 49
Table 8 – Symbols of principal units used for meters . 53
Table 9 – Voltage and current balance . 55
Table 10 – Reference conditions . 55
Table 11 – Repeatability test points . 59
Table 12 – Environmental conditions . 60
Table 13 – Summary of the tests of immunity to influence quantities . 63
Table 14 – Summary of the tests of immunity to disturbances . 64
Table 15 – Acceptance criteria . 65
Table 16 – Voltage dips, short interruptions and voltage variations immunity tests . 67
Table 17 – Voltage dips, short interruptions and voltage variations on DC input power
port immunity tests . 68
Table 18 – Surge immunity test voltage . 73
Table 19 – Evaluation of primary meter functions under influence of voltage variation . 79
Table B.1 – Specified operating conditions . 86
Table B.2 – Test of pulse output . 87
Table B.3 – Test of pulse input device . 88
Table C.1 – Specified operating conditions . 89
Table C.2 – Test of pulse output device . 91
Table C.3 – Test of pulse input device . 91
Table D.1 – Examples of voltage marking according to network voltage . 92
Table D.2 – Symbols for measuring elements . 92
Table D.3 – Marking of the measured quantity (examples) . 93
Table D.4 – Inscriptions indicating the accuracy class and the meter constant
(examples) . 93
Table D.5 – Symbols for transformer-operated meters (examples) . 94
Table D.6 – Tariff function symbols (examples) . 94
Table D.7 – Symbols for tariff function (examples) . 94
Table D.8 – Symbols for auxiliary devices (examples) . 95
Table D.9 – Symbols for details of the suspension of the moving element (examples) . 95
Table D.10 – Symbols for communication ports (examples) . 96
Table N.1 – Cross-channel influence test conditions for multi-circuit meters . 116
– 8 – IEC 62052-11:2020 © IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICITY METERING EQUIPMENT –
GENERAL REQUIREMENTS, TESTS AND TEST CONDITIONS –
Part 11: Metering equipment
FOREWORD
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6) All users should ensure that they have the latest edition of this publication.
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) 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 62052-11 has been prepared by IEC technical committee 13:
Electrical energy measurement and control.
This second edition cancels and replaces the first edition published in 2003, 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 O.
The text of this International Standard is based on the following documents:
FDIS Report on voting
13/1808/FDIS 13/1812/RVD
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 62052 series, published under the general title Electricity metering
equipment – General requirements, tests and test conditions, 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 prepare 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 two years from the date of publication.
– 10 – IEC 62052-11:2020 © IEC 2020
INTRODUCTION
The general overview and organization of the IEC 6205x series of standards applicable to
electricity metering and load control equipment is as follows:
PRODUCT FAMILIES
AC meters DC meters
for for
AC meters rated
connection connection
PRODUCT FAMILY
up to 1 000 V for
DC meters rated
through through
STANDARDS –
direct connection Tariff and
up to 1 500 V for
LPITs LPITs
GENERAL
or connection load control
direct connection
(as defined (as defined
REQUIREMENTS
through equipment
in the in the
conventional
IEC 61869 IEC 61869
transformers
series of series of
standards) standards)
NOMINAL
VALUES,
Planned:
CONSTRUCTION,
IEC 62052-XX
ELECTRICAL, IEC 62052‑21
IEC 62052‑11:2020 IEC 62052‑11:2020 general requirements for
CLIMATIC AND 2004
meters for connection
EMC
through LPITs.
REQUIREMENTS.
TEST METHODS
Planned:
Planned:
nd
IEC 62052-31 2
IEC 62052-XX
edition including
SAFETY IEC 62052-31:2015 safety requirements for
safety
meters for connection
requirements for
through LPITs.
DC meters
Planned: Planned:
IEC 62059-11: 2002, IEC 62059- IEC 62059-XX IEC 62059-XX
DEPENDABILITY 21:2002, IEC 62059-32-1 2011, dependability dependability requirements
IEC 62059-41:2006 requirements for for meters for connection
DC meters through LPITs.
Planned:
IEC 62058-XX
ACCEPTANCE
IEC 62058-11:2008 acceptance inspection
INSPECTION
requirements for meters for
connection through LPITs.
EMBEDDED Planned: IEC 6205x-xx embedded software (firmware) requirements and test methods for
SOFTWARE electricity metering and load control equipment
PRODUCT FAMILY STANDARDS –
PARTICULAR REQUIREMENTS AND ACCURACY CLASSES
AC meters for DC meters for
AC meters rated up to
connection connection
1 000 V for direct
DC meters rated through LPITs through LPITs
connection or Tariff and load
up to 1 500 V for (as defined in (as defined in
connection through control equipment
direct connection the IEC 61869 the IEC 61869
conventional
series of series of
transformers
standards) standards)
Electromechanical,
active energy directly
Static, DC energy, Planned: Planned:
Ripple control
connected,
directly connected, LPIT operated LPIT operated
receivers
classes 0,5, 1 meters meters
classes 0,5, 1, 2
IEC 62054-11:2004
IEC 62053-41 – IEC 62053-xx IEC 62053-xx
IEC 62053-11:2003,
IEC 62058-21:2008
Static, active energy
directly connected, and
Time switches
transformer operated,
____ ____ ____
classes 1, 2
IEC 62054-21:2004
IEC 62053-21:2020,
IEC 62058-31:2008,
Static, active energy, ____ ____ ____
transformer operated,
classes 0,1S, 0,2S, 0,5S ____
IEC 62053-22:2020,
IEC 62058-31:2008
Static, reactive energy ____ ____ ____ ____
directly connected, and
transformer operated,
classes 2, 3
IEC 62053-23:2020
Static, reactive energy ____ ____ ____ ____
directly connected, and
transformer operated,
classes 0,5 S, 1S, 1, 2, 3
IEC 62053-24:2020
Static, active energy ____ ____ ____ ____
directly connected,
prepayment
classes 1, 2
IEC 62055-31:2005
This part of IEC 62052 is to be used with relevant parts of the IEC 62052, IEC 62053, IEC 62058
and IEC 62059 series:
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 1 and 2)
IEC 62053-22:2020, Electricity metering equipment – Particular requirements –
Part 22: Static meters for AC active energy (classes 0,1S, 0,2S
and 0,5S)
IEC 62053-23:2020, Electricity metering equipment – Particular requirements –
Part 23: Static meters for reactive energy (classes 2 and 3)
– 12 – IEC 62052-11:2020 © IEC 2020
IEC 62053-24:2020, Electricity metering equipment– Particular requirements –
Part 24: Static meters for fundamental component reactive
energy (classes 0,5S, 1S, 1, 2 and 3)
IEC 62053-41: – , Electricity metering equipment– Particular requirements –
Part 41: Static meters for direct current energy (classes 0,5 and
1)
IEC 62055-31:2005, Electricity metering – Payment systems – Part 31: Particular
requirements – Static payment meters for active energy (classes
1 and 2)
IEC 62056-6-1:2017, Electricity metering data exchange – The DLMS/COSEM suite –
Part 6-1: Object Identification System (OBIS)
IEC 62056-6-2:2017, Electricity metering data exchange – The DLMS/COSEM suite –
Part 6-2: COSEM interface classes
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 document is intended to be used in conjunction with the appropriate part of IEC 62053 for
the type of equipment under consideration.
The test levels are regarded as minimum values for the proper functioning of the meter under
normal working conditions. For special application, other test levels may be used and are
subject to an agreement between the manufacturer and the purchaser.
ELECTRICITY METERING EQUIPMENT –
GENERAL REQUIREMENTS, TESTS AND TEST CONDITIONS –
Part 11: Metering equipment
1 Scope
This part of IEC 62052 specifies requirements and associated tests, with their appropriate
conditions for type testing of AC and DC electricity meters. This document details functional,
mechanical, electrical and marking requirements, test methods, and test con
...
IEC 62052-11 ®
Edition 2.0 2020-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electricity metering equipment – General requirements, tests and test
conditions –
Part 11: Metering equipment
Équipement de comptage de l'électricité – Exigences générales, essais et
conditions d'essai –
Partie 11: Équipement de comptage
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IEC 62052-11 ®
Edition 2.0 2020-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electricity metering equipment – General requirements, tests and test
conditions –
Part 11: Metering equipment
Équipement de comptage de l'électricité – Exigences générales, essais et
conditions d'essai –
Partie 11: Équipement de comptage
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220.20 ISBN 978-2-8322-1036-9
– 2 – IEC 62052-11:2020 © IEC 2020
CONTENTS
FOREWORD . 8
INTRODUCTION . 10
1 Scope . 13
2 Normative references . 14
3 Terms and definitions . 17
3.1 General definitions . 17
3.2 Definitions related to the functional elements . 21
3.3 Definitions of meter ports . 24
3.4 Definitions of mechanical elements . 25
3.5 Definitions related to measurements . 27
3.6 Definitions related to external influences . 30
3.7 Definition of tests . 33
3.8 Definitions related to electromechanical meters . 33
3.9 Definitions related to meter marking and symbols . 34
4 Nominal electrical values . 35
4.1 Voltages . 35
4.1.1 Nominal voltages . 35
4.1.2 Voltage ranges . 36
4.2 Currents . 36
4.2.1 Nominal currents . 36
4.2.2 Starting current . 36
4.2.3 Minimum current . 36
4.2.4 Maximum current . 37
4.2.5 Current ranges . 37
4.3 Frequencies . 37
4.3.1 Nominal frequencies . 37
4.3.2 Frequency ranges . 37
4.4 Power consumption . 37
5 Construction requirements . 39
5.1 General . 39
5.2 Mechanical tests . 39
5.2.1 Shock test . 39
5.2.2 Vibration test . 40
5.3 Window . 40
5.4 Terminals – Terminal block(s) – Protective conductor terminal . 40
5.5 Sealing provisions . 40
5.5.1 General . 40
5.5.2 Meter case . 40
5.5.3 Meter terminals . 41
5.5.4 Sealing of detached indicating displays . 41
5.5.5 Sealing of LPIT connections . 41
5.5.6 Sealing of meter configuration . 42
5.6 Display of measured values . 42
5.6.1 General . 42
5.6.2 Meters without indicating displays. 42
5.6.3 Meters with indicating displays . 42
5.7 Storage of measured values . 43
5.8 Pulse outputs . 43
5.8.1 General . 43
5.8.2 Optical test output . 43
5.8.3 Electrical pulse output . 45
5.8.4 Operation indicator . 45
5.9 Electrical pulse inputs . 46
5.9.1 General characteristics . 46
5.9.2 Functional tests of electrical pulse inputs . 46
5.10 Auxiliary power supply . 46
6 Meter marking and documentation . 47
6.1 Meter accuracy class marking . 47
6.2 Meter marking . 47
6.3 Connection diagrams and terminal marking . 51
6.4 Symbols . 51
6.4.1 General . 51
6.4.2 Symbols for the measuring elements . 52
6.4.3 Symbols for transformer-operated meters . 52
6.4.4 Identification of the displayed information . 52
6.4.5 Marking of the measured quantity . 53
6.4.6 Symbols of principal units used for meters (see Table 8) . 53
6.4.7 Symbols for auxiliary devices . 54
6.4.8 Symbols for details of the suspension of the moving element . 54
6.4.9 Symbols for communication ports . 54
6.5 Documentation . 54
6.5.1 Installation manuals . 54
6.5.2 Instruction for use . 54
7 Metrological performance requirements and tests . 54
7.1 General test conditions . 54
7.2 Methods of accuracy verification . 56
7.3 Measurement uncertainty . 56
7.4 Meter constant . 57
7.5 Initial start-up of the meter . 57
7.6 Test of no-load condition . 58
7.7 Starting current test . 58
7.8 Repeatability test . 59
7.9 Limits of error due to variation of the current . 59
7.10 Limits of error due to influence quantities . 60
7.11 Time-keeping accuracy . 60
8 Climatic requirements . 60
8.1 General . 60
8.2 Environmental conditions . 60
8.3 Tests of the effects of the climatic environments . 60
8.3.1 General test requirements . 60
8.3.2 Acceptance criteria . 61
8.3.3 Dry heat test . 61
8.3.4 Cold test . 61
8.3.5 Damp heat cyclic test . 61
8.3.6 Protection against solar radiation . 62
– 4 – IEC 62052-11:2020 © IEC 2020
8.4 Durability . 62
9 The effects of external influence quantities and disturbances . 62
9.1 General . 62
9.2 Acceptance criteria . 64
9.3 Electromagnetic compatibility (EMC) . 65
9.3.1 General . 65
9.3.2 Voltage dips and short interruptions . 67
9.3.3 Electrostatic discharge immunity test . 69
9.3.4 Radiated, radio-frequency, electromagnetic field immunity test – test
without current . 69
9.3.5 Radiated, radio-frequency, electromagnetic field immunity test – test
with current. 70
9.3.6 Electrical fast transient/burst immunity test . 71
9.3.7 Immunity to conducted disturbances, induced by radio-frequency fields . 71
9.3.8 Test for immunity to conducted, differential mode disturbances and
signalling in the frequency range 2 kHz to 150 kHz at AC power ports . 72
9.3.9 Surge immunity test . 73
9.3.10 Ring wave immunity test . 74
9.3.11 Damped oscillatory wave immunity test . 75
9.3.12 External static magnetic fields . 75
9.3.13 Power frequency magnetic field immunity test . 76
9.3.14 Emission requirements . 77
9.4 Tests of immunity to other influence quantities . 77
9.4.1 General . 77
9.4.2 Harmonics in the current and voltage circuits . 78
9.4.3 Voltage variation . 79
9.4.4 Ambient temperature variation . 79
9.4.5 Interruption of phase voltage . 80
9.4.6 Frequency variation . 80
9.4.7 Reversed phase sequence . 81
9.4.8 Auxiliary voltage variation . 81
9.4.9 Operation of auxiliary devices . 81
9.4.10 Short-time overcurrents . 81
9.4.11 Self-heating . 82
9.4.12 Fast load current variations . 82
9.4.13 Earth fault . 83
10 Type test . 84
10.1 Test conditions . 84
10.2 Type test report . 84
Annex A (normative) Optical test output . 86
Annex B (normative) Class A and class B electrical pulse outputs . 87
B.1 Electrical characteristics of pulse output . 87
B.2 Electrical output pulse waveform . 88
B.3 Test of electrical pulse output . 88
B.4 Test of pulse input . 88
Annex C (normative) Electrical pulse output for special applications and long
distances according to IEC 60381-1:1982 . 90
C.1 Specified operating conditions and output pulse waveform . 90
C.2 Test of pulse output . 91
C.3 Test of pulse input . 92
Annex D (informative) Meter symbols and markings . 93
Annex E (informative) Meter ports . 98
Annex F (informative) Test set-up for EMC tests . 101
Annex G (informative) Test for immunity to conducted, differential mode disturbances
and signalling in the frequency range 2 kHz to 150 kHz at AC power ports . 103
Annex H (normative) Test circuit diagrams for testing influence of harmonics and
interharmonics . 104
Annex I (informative) Short time overcurrent test waveform . 110
Annex J (informative) Fast load current variation test . 111
Annex K (normative) Electromagnet for testing the influence of externally produced
magnetic fields. 112
K.1 Permanent magnet for testing the influence of external static magnetic field . 112
K.2 Electromagnet for testing the influence of external static magnetic field with
magneto-motive force of 1 000 At (ampere-turns) (see Figure K.1) . 112
Annex L (normative) Test circuit diagram for the test of immunity to earth fault . 114
Annex M (informative) Meter current range . 115
Annex N (informative) Application to Branch Circuit Power Meters . 116
N.1 Overview. 116
N.2 Definitions. 116
N.3 General . 116
N.4 Cross-channel influences . 117
N.5 Channel configuration and sealing for multi-branch meters . 117
N.6 Verification for multi-branch meters . 117
Annex O (informative) Overview of the technical changes . 118
Annex P (informative) Test schedule – Recommended test sequences . 119
Figure A.1 – Test arrangement for the test output . 86
Figure A.2 – Waveform of the optical test output . 86
Figure B.1 – Physical interface of the electrical pulse output . 87
Figure B.2 – Electrical output pulse waveform . 88
Figure B.3 – Pulse output test set-up . 88
Figure B.4 – Pulse input test set-up . 89
Figure C.1 – Output pulse waveform . 91
Figure C.2 – Pulse output test set-up . 91
Figure C.3 – Pulse input test set-up . 92
Figure E.1 – Typical port configuration of a directly connected meter (example) . 98
Figure E.2 – Typical port configuration of a transformer operated meter (example) . 99
Figure E.3 – Typical port configuration of a LPIT operated meter with a detached
indicating display (example) . 99
Figure F.1 – Test set-up for the electrical fast transient/burst immunity test for
transformer oper-ated meters: each port (Mains, CT, HLV, ELV) is tested separately by
adding the coupling device to the respective port . 101
Figure F.2 – Test set-up for the electrical fast transient/burst immunity test for directly
connected meters: each port (Mains, HLV, ELV) is tested separately by adding the
coupling device to the respective port . 102
– 6 – IEC 62052-11:2020 © IEC 2020
Figure G.1 – Example of a test set-up for immunity to conducted, differential mode
disturbances and signalling in the frequency range 2 kHz to 150 kHz at AC power ports
(from IEC 61000-4-19: 2014) . 103
Figure H.1 – Test circuit diagram (informative, test of influence of interharmonics and
odd harmonics) . 104
Figure H.2 – Burst fired wave-form (interharmonics) . 105
Figure H.3 – Informative distribution of interharmonic content of burst-fired waveform
(the Fourier analysis is not complete) . 105
Figure H.4 – Phase fired waveform (odd harmonics) – 90° fired waveform . 106
Figure H.5 – Informative distribution of harmonic content of 90° phase fired waveform
(the Fourier analysis is not complete) . 106
Figure H.6 – Phase fired waveform (odd harmonics) – 45° fired waveform . 107
Figure H.7 – Phase fired waveform (odd harmonics) – 135° fired waveform . 107
Figure H.8 – Test circuit diagram for half-wave rectification (DC and even harmonics) . 108
Figure H.9 – Half-wave rectified waveform (DC and even harmonics) . 108
Figure H.10 – Informative distribution of harmonic content of half-wave rectified
waveform (the Fourier analysis is not complete) . 109
Figure K.1 – Electromagnet for testing the influence of external static magnetic field
with magneto-motive force of 1 000 At (ampere-turns) . 113
Figure L.1 – Circuit to simulate earth fault condition in phase 1 . 114
Figure L.2 – Voltages at the meter under test . 114
Figure M.1 – Meter current range . 115
Table 1 – Nominal voltages . 35
Table 2 – Voltage ranges . 36
Table 3 – Preferred values of nominal currents . 36
Table 4 – Current ranges . 37
Table 5 – Frequency ranges . 37
Table 6 – Maximum power consumption. 38
Table 7 – Marking and documentation requirements . 49
Table 8 – Symbols of principal units used for meters . 53
Table 9 – Voltage and current balance . 55
Table 10 – Reference conditions . 55
Table 11 – Repeatability test points . 59
Table 12 – Environmental conditions . 60
Table 13 – Summary of the tests of immunity to influence quantities . 63
Table 14 – Summary of the tests of immunity to disturbances . 64
Table 15 – Acceptance criteria . 65
Table 16 – Voltage dips, short interruptions and voltage variations immunity tests . 68
Table 17 – Voltage dips, short interruptions and voltage variations on DC input power
port immunity tests . 69
Table 18 – Surge immunity test voltage . 74
Table 19 – Evaluation of primary meter functions under influence of voltage variation . 79
Table B.1 – Specified operating conditions . 87
Table B.2 – Test of pulse output . 88
Table B.3 – Test of pulse input device . 89
Table C.1 – Specified operating conditions . 90
Table C.2 – Test of pulse output device . 92
Table C.3 – Test of pulse input device . 92
Table D.1 – Examples of voltage marking according to network voltage . 93
Table D.2 – Symbols for measuring elements . 93
Table D.3 – Marking of the measured quantity (examples) . 94
Table D.4 – Inscriptions indicating the accuracy class and the meter constant
(examples) . 94
Table D.5 – Symbols for transformer-operated meters (examples) . 95
Table D.6 – Tariff function symbols (examples) . 95
Table D.7 – Symbols for tariff function (examples) . 96
Table D.8 – Symbols for auxiliary devices (examples) . 96
Table D.9 – Symbols for details of the suspension of the moving element (examples) . 96
Table D.10 – Symbols for communication ports (examples) . 97
Table N.1 – Cross-channel influence test conditions for multi-circuit meters . 117
– 8 – IEC 62052-11:2020 © IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICITY METERING EQUIPMENT –
GENERAL REQUIREMENTS, TESTS AND TEST CONDITIONS –
Part 11: Metering equipment
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,
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preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
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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
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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 62052-11 has been prepared by IEC technical committee 13:
Electrical energy measurement and control.
This second edition cancels and replaces the first edition published in 2003, 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 O.
The text of this International Standard is based on the following documents:
FDIS Report on voting
13/1808/FDIS 13/1812/RVD
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 62052 series, published under the general title Electricity metering
equipment – General requirements, tests and test conditions, 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 prepare 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 two years from the date of publication.
– 10 – IEC 62052-11:2020 © IEC 2020
INTRODUCTION
The general overview and organization of the IEC 6205x series of standards applicable to
electricity metering and load control equipment is as follows:
PRODUCT FAMILIES
AC meters DC meters
for for
AC meters rated
connection connection
PRODUCT FAMILY
up to 1 000 V for
DC meters rated
through through
STANDARDS –
direct connection Tariff and
up to 1 500 V for
LPITs LPITs
GENERAL
or connection load control
direct connection
(as defined (as defined
REQUIREMENTS
through equipment
in the in the
conventional
IEC 61869 IEC 61869
transformers
series of series of
standards) standards)
NOMINAL
VALUES,
Planned:
CONSTRUCTION,
IEC 62052-XX
ELECTRICAL, IEC 62052‑21
IEC 62052‑11:2020 IEC 62052‑11:2020 general requirements for
CLIMATIC AND 2004
meters for connection
EMC
through LPITs.
REQUIREMENTS.
TEST METHODS
Planned:
Planned:
nd
IEC 62052-31 2
IEC 62052-XX
edition including
SAFETY IEC 62052-31:2015 safety requirements for
safety
meters for connection
requirements for
through LPITs.
DC meters
Planned: Planned:
IEC 62059-11: 2002, IEC 62059- IEC 62059-XX IEC 62059-XX
DEPENDABILITY 21:2002, IEC 62059-32-1 2011, dependability dependability requirements
IEC 62059-41:2006 requirements for for meters for connection
DC meters through LPITs.
Planned:
IEC 62058-XX
ACCEPTANCE
IEC 62058-11:2008 acceptance inspection
INSPECTION
requirements for meters for
connection through LPITs.
EMBEDDED Planned: IEC 6205x-xx embedded software (firmware) requirements and test methods for
SOFTWARE electricity metering and load control equipment
PRODUCT FAMILY STANDARDS –
PARTICULAR REQUIREMENTS AND ACCURACY CLASSES
AC meters for DC meters for
AC meters rated up to
connection connection
1 000 V for direct
DC meters rated through LPITs through LPITs
connection or Tariff and load
up to 1 500 V for (as defined in (as defined in
connection through control equipment
direct connection the IEC 61869 the IEC 61869
conventional
series of series of
transformers
standards) standards)
Electromechanical,
active energy directly
Static, DC energy, Planned: Planned:
Ripple control
connected,
directly connected, LPIT operated LPIT operated
receivers
classes 0,5, 1 meters meters
classes 0,5, 1, 2
IEC 62054-11:2004
IEC 62053-41 – IEC 62053-xx IEC 62053-xx
IEC 62053-11:2003,
IEC 62058-21:2008
Static, active energy
directly connected, and
Time switches
transformer operated,
____ ____ ____
classes 1, 2
IEC 62054-21:2004
IEC 62053-21:2020,
IEC 62058-31:2008,
Static, active energy, ____ ____ ____
transformer operated,
classes 0,1S, 0,2S, 0,5S ____
IEC 62053-22:2020,
IEC 62058-31:2008
Static, reactive energy ____ ____ ____ ____
directly connected, and
transformer operated,
classes 2, 3
IEC 62053-23:2020
Static, reactive energy ____ ____ ____ ____
directly connected, and
transformer operated,
classes 0,5 S, 1S, 1, 2, 3
IEC 62053-24:2020
Static, active energy ____ ____ ____ ____
directly connected,
prepayment
classes 1, 2
IEC 62055-31:2005
This part of IEC 62052 is to be used with relevant parts of the IEC 62052, IEC 62053, IEC 62058
and IEC 62059 series:
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 1 and 2)
IEC 62053-22:2020, Electricity metering equipment – Particular requirements –
Part 22: Static meters for AC active energy (classes 0,1S, 0,2S
and 0,5S)
IEC 62053-23:2020, Electricity metering equipment – Particular requirements –
Part 23: Static meters for reactive energy (classes 2 and 3)
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