IEC 62053-41:2021

Electricity metering equipment - Particular requirements - Part 41: Static meters for DC energy (classes 0,5 and 1)

IEC 62053-41:2021 applies only to static watt-hour meters of accuracy classes 0,5 and 1 for the measurement of DC electrical energy in DC systems, and it applies to their type tests only.
This document applies to electricity metering equipment designed to:
• measure and control electrical energy on electrical networks with two poles where one of the poles is connected to earth and with voltage up to 1 500 V DC;
• have all functional elements, including add-on modules, enclosed in, or forming a single meter case with the exception of indicating displays;
• operate with integrated or detached indicating displays, or without an indicating display;
• be installed in a specified matching socket or rack;
• optionally, provide additional functions other than those for measurement of electrical energy.
They may be used for measuring DC electrical energy, amongst others, in the following application areas:
• in EV (electrical vehicle) charging stations or in EV charging infrastructures, if the measurement is placed on the DC side;
• in information technology (IT) server farms;
• in DC supply points for communication equipment;
• in low voltage DC networks for residential or commercial areas, if the measurement is placed on the DC side;
• in solar PV (photovoltaic) systems where DC power generation is measured;
• in DC supply points for public transport networks (e.g. trolleybus, etc.).
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 only if such meters and their LPITs are tested together and meet the requirements for directly connected meters.
This document does not apply to:
• meters for which the voltage between the two poles, where one of the poles is connected to earth, exceeds 1 500 V DC;
• meters to be used in networks other than with two poles in which one of the poles is connected to earth;
• meters intended for connection with low power instrument transformers (LPITs as defined in the IEC 61869 series) when tested without such transformers;
• metering systems comprising multiple devices physically (except LPITs) 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 detection and prevention of fraudulent attempts to compromise a meter’s performance (tampering).

Équipement de comptage de l'électricité - Exigences particulières - Partie 41: Compteurs statiques d'énergie en courant continu (classes 0,5 et 1)

IEC 62053:41:2021 est applicable uniquement aux compteurs statiques d'énergie de classes d'exactitude 0,5 et 1, destinés au mesurage de l'énergie électrique en courant continu dans les systèmes en courant continu, et à leurs essais de type.
Le présent document s'applique aux équipements de comptage de l'électricité conçus pour:
• mesurer et piloter l'énergie électrique sur les réseaux électriques à deux pôles, l'un des pôles étant relié à la terre, de tension jusqu'à 1 500 V en courant continu;
• avoir tous les éléments fonctionnels, y compris les modules additionnels, incorporés dans ou formant un boîtier de compteur unique, à l'exception des afficheurs ou dispositifs indicateurs;
• fonctionner avec des afficheurs intégrés ou séparés, ou sans afficheur;
• être installés dans un rack ou une embase correspondante spécifié(e);
• assurer, en option, des fonctions additionnelles autres que celles relatives au comptage de l'énergie électrique.
Ils peuvent être utilisés pour le comptage de l'énergie électrique en courant continu notamment dans les domaines d'application suivants:
• dans les bornes de recharge pour véhicules électriques ou les infrastructures de recharge pour véhicules électriques, si le mesurage est effectué côté courant continu;
• dans les parcs de serveurs des technologies de l'information (TI);
• dans les points d'alimentation en courant continu pour les équipements de communication;
• dans les réseaux basse tension en courant continu des zones résidentielles ou commerciales, si le mesurage est effectué côté courant continu;
• dans les systèmes photovoltaïques (PV) où la puissance générée en courant continu est mesurée;
• dans les points d'alimentation en courant continu pour les réseaux de transport public (par exemple, trolleybus, etc.).
Les compteurs conçus pour être utilisés avec des transformateurs de mesure de faible puissance (LPIT, Low Power Instrument Transformers, définis dans la série IEC 61869) ne peuvent être soumis à des essais de conformité au présent document que si ces compteurs et leurs LPIT sont soumis ensemble aux essais et satisfont aux exigences relatives aux compteurs à branchement direct.
Le présent document ne s'applique pas:
• aux compteurs dont la tension entre les deux pôles, l'un des pôles étant relié à la terre, dépasse 1 500 V en courant continu;
• aux compteurs prévus pour être utilisés dans des réseaux autres qu'à deux pôles, l'un des pôles étant relié à la terre;
• aux compteurs destinés à être connectés à des transformateurs de mesure de faible puissance (LPIT, définis dans la série IEC 61869) lorsqu'ils sont soumis à l'essai sans ces transformateurs;
• aux systèmes de comptage qui comprennent plusieurs dispositifs physiquement éloignés les uns des autres (à l'exception des LPIT);
• 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 données avec l'élément indicateur du compteur;
• aux racks ou embases correspondantes utilisés pour l'installation des équipements de comptage de l'électricité;
• à toute fonction additionnelle assurée par les compteurs d'énergie électrique.
Le présent document ne couvre pas les mesures de détection et de prévention des tentatives frauduleuses qui visent à compromettre les performances d'un compteur (falsification).

General Information

• Status: Published
• Publication Date: 14-Jun-2021
• ICS: 17.220.20 - Measurement of electrical and magnetic quantities
• Technical Committee: TC 13 - Electrical energy measurement and control
• Drafting Committee: WG 11 - TC 13/WG 11
• Current Stage: PPUB - Publication issued
• Start Date: 15-Jun-2021
• Completion Date: 26-Oct-2025

Overview

IEC 62053-41:2021 is an international standard specifying the particular requirements for static electricity meters used to measure direct current (DC) electrical energy. Applicable to meters of accuracy classes 0.5 and 1, this standard focuses on static watt-hour meters designed for DC systems operating up to 1,500 V DC with two poles, where one pole is earthed. It covers type testing of these static meters rather than portable or metering systems with remote components. The standard ensures accuracy, reliability, and safety for DC energy metering equipment used in various modern electrical networks and infrastructures.

Key Topics

• Scope and Application:
  The standard applies to meters that:

  • Measure and control DC electrical energy in two-pole networks with one pole earthed.
  • Include all functional components within a single meter case, except possibly for detached indicating displays.
  • Can be installed in compatible sockets or racks.
  • May provide additional optional functions beyond basic energy measurement.

• Accuracy Classes:
  Defines two accuracy classes, 0.5 and 1, which specify the permitted error margins and testing conditions to ensure precise DC energy measurements.

• Test Requirements:
  Covers a comprehensive range of type tests including:

  • Starting current and no-load tests
  • Repeatability and error limits testing under varying current conditions and environmental influences
  • Climatic durability and effects of external electrical disturbances, including differential mode current disturbances

• Electrical and Construction Specifications:
  Details nominal voltages, currents, and power consumption limits; construction standards; and marking/documentation requirements to guarantee safe and reliable operation.

• Exclusions:
  Does not cover meters for DC voltages above 1,500 V, metering systems with remote devices, portable meters, and meters intended for rolling stock, vehicles, ships, or aircraft.

Applications

IEC 62053-41 static DC energy meters are designed for diverse uses where accurate DC energy measurement is critical. Common application areas include:

• Electric Vehicle (EV) Charging Infrastructure:
  Accurate measurement of DC energy consumption on the DC side of EV charging stations supports billing, monitoring, and energy management.

• Information Technology Facilities:
  In data centers and server farms, these meters monitor DC power supply for efficient energy use and reliability.

• Telecommunications and Communication Equipment:
  DC supply points for communication hardware rely on precise energy metering to maintain uptime and manage power loads.

• Low-Voltage DC Distribution:
  Residential and commercial areas with DC networks use these meters for energy accounting and control.

• Solar Photovoltaic (PV) Systems:
  Measuring generated DC power enables performance monitoring and integration with energy management systems.

• Public Transportation DC Supply:
  Systems like trolleybuses and trams utilize these meters to track energy usage in DC traction networks.

Related Standards

IEC 62053-41:2021 is part of a broader family of standards on electricity metering equipment with complementary and overlapping scopes, including:

• IEC 62052-11:2020 – General requirements and tests for electricity metering equipment.
• IEC 62052-31:2015 – Product safety requirements for electricity metering equipment (AC).
• IEC 62053-11:2003 / AMD1:2016 – Electromechanical meters for AC active energy.
• IEC 62053-21:2020 – Static meters for AC active energy, accuracy classes 0.5, 1, 2.
• IEC 62058 series – Acceptance inspection methods for electricity meters.
• IEC 61869 series – Low power instrument transformers (LPITs), relevant when meters are tested together with LPITs.

For optimal meter design, testing, and deployment, IEC 62053-41 is intended to be used alongside these standards, ensuring harmonization across AC and DC metering technologies and aligning performance, safety, and interoperability requirements.

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Keywords: IEC 62053-41, DC energy meters, static watt-hour meters, electricity metering equipment, accuracy classes 0.5 and 1, DC metering standard, EV charging meter standards, photovoltaic DC measurement, IEC electricity standards, DC energy measurement, type testing of meters.

Standards Content (Sample)

IEC 62053-41 ®
Edition 1.0 2021-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electricity metering equipment – Particular requirements –
Part 41: Static meters for DC energy (classes 0,5 and 1)

Équipement de comptage de l'électricité – Exigences particulières –
Partie 41: Compteurs statiques d'énergie en courant continu (classes 0,5 et 1)

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IEC 62053-41 ®
Edition 1.0 2021-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electricity metering equipment – Particular requirements –

Part 41: Static meters for DC energy (classes 0,5 and 1)

Équipement de comptage de l'électricité – Exigences particulières –

Partie 41: Compteurs statiques d'énergie en courant continu (classes 0,5 et 1)

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220.20 ISBN 978-2-8322-9863-3

– 2 – IEC 62053-41:2021 © IEC 2021
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 7
2 Normative references . 8
3 Terms and definitions . 9
4 Standard electrical values. 10
4.1 Voltages . 10
4.1.1 Nominal voltages . 10
4.1.2 Voltage ranges . 10
4.2 Currents . 10
4.2.1 Nominal current . 10
4.2.2 Starting current . 10
4.2.3 Minimum current . 10
4.2.4 Maximum current . 10
4.3 Power consumption . 10
5 Construction requirements . 11
6 Meter marking and documentation . 11
7 Accuracy requirements . 11
7.1 General test conditions . 11
7.2 Methods of accuracy verification . 11
7.3 Measurement uncertainty . 11
7.4 Meter constant . 11
7.5 Initial start-up of the meter . 11
7.6 Test of no-load condition . 11
7.7 Starting current test . 12
7.8 Repeatability test . 12
7.9 Limits of error due to variation of the current . 12
7.10 Limits of error due to influence quantities . 12
7.11 Time-keeping accuracy . 13
8 Climatic requirements . 13
9 Effects of external influences . 14
9.1 General . 14
9.2 Conducted differential mode current disturbances for DC meters . 14
10 Type test . 14
Annex A (informative) Differential mode current disturbance test . 15
Bibliography . 16

Table 1 – Starting current . 10
Table 2 – Minimum current. 10
Table 3 – Power consumption . 11
Table 4 – Acceptable percentage error limits . 12
Table 5 – Acceptable limits of variation in percentage error due to influence quantities . 13
Table A.1 – Overview of differential mode current disturbances in different IEC
standards . 15

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICITY METERING EQUIPMENT –
PARTICULAR REQUIREMENTS –
Part 41: Static meters for DC energy (classes 0,5 and 1)

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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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62053-41 has been prepared by IEC technical committee 13:
Electrical energy measurement and control.
The text of this International Standard is based on the following documents:
FDIS Report on voting
13/1831/FDIS 13/1842/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.

– 4 – IEC 62053-41:2021 © IEC 2021
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 of the IEC 62053 series, published under the general title Electricity metering
equipment – Particular requirements, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
INTRODUCTION
This part of IEC 62053 is to be used with relevant parts of the IEC 62052, IEC 62057, IEC 62058
and IEC 62059 series, and with IEC 62055:
IEC 62052-11:2020, Electricity metering equipment – General requirements, tests and test
conditions – Part 11: Metering equipment
IEC 62052-31:2015, Electricity metering equipment (AC) – General requirements, tests and test
conditions – Part 31: Product safety requirements and tests
IEC 62053-11:2003, Electricity metering equipment (a.c.) – Particular requirements – Part 11:
Electromechanical meters for active energy (classes 0,5, 1 and 2)
IEC 62053-11:2003/AMD1:2016
IEC 62053-21:2020, Electricity metering equipment – Particular requirements – Part 21: Static
meters for AC active energy (classes 0,5, 1 and 2)
IEC 62053-22:2020, Electricity metering equipment – Particular requirements – Part 22: Static
meters for AC active energy (classes 0,1S, 0,2S and 0,5S)
IEC 62055-31:2005, Electricity metering – Payment systems – Part 31: Particular requirements
– Static payment meters for active energy (classes 1 and 2)
IEC 62057-1: Test equipment, techniques and procedures for electrical energy meters – Part 1:
Stationary Meter Test Units (MTU)
IEC 62058-11:2008, Electricity metering equipment (AC) – Acceptance inspection – Part 11:
General acceptance inspection methods
IEC 62058-21:2008, Electricity metering equipment (AC) – Acceptance inspection – Part 21:
Particular requirements for electromechanical meters for active energy (classes 0,5, 1 and 2)
IEC 62058-31:2008, Electricity metering equipment (AC) – Acceptance inspection – Part 31:
Particular requirements for static meters for active energy (classes 0,2 S, 0,5 S, 1 and 2)
IEC TR 62059-11:2002, Electricity metering equipment – Dependability – Part 11: General
concepts
IEC TR 62059-21:2002, Electricity metering equipment – Dependability – Part 21: Collection of
meter dependability data from the field
This part is a standard for type testing electricity meters. It covers the particular requirements
for meters used indoors, as such applications are the most common. Using the meters outdoors
is possible if the meter is placed in an additional meter cabinet providing suitable protection
against environmental effects. It does not deal with special implementations (such as metering-
part and/or displays in separate housings).
This document is intended to be used in conjunction with IEC 62052-11:2020 and with
IEC 62052-31:2015. When any requirement in this document concerns an item already covered
in IEC 62052-11:2020 or in IEC 62052-31:2015, the requirements of this document take
precedence over the requirements of IEC 62052-11:2020 or of IEC 62052-31:2015.
____________
Under preparation. Stage at the time of publication: CCDV.

– 6 – IEC 62053-41:2021 © IEC 2021
The test levels are regarded as minimum values that provide for the proper functioning of the
meter under normal working conditions. For special applications, additional test levels might be
necessary and are subject to an agreement between the manufacturer and the purchaser.

ELECTRICITY METERING EQUIPMENT –
PARTICULAR REQUIREMENTS –
Part 41: Static meters for DC energy (classes 0,5 and 1)

1 Scope
This part of IEC 62053 applies only to static watt-hour meters of accuracy classes 0,5 and 1 for
the measurement of DC electrical energy in DC systems, and it applies to their type tests only.
NOTE 1 For other general requirements, such as safety, dependability, etc., see the relevant parts of IEC 62052 or
IEC 62059.
This document applies to electricity metering equipment designed to:
• measure and control electrical energy on electrical networks with two poles where one of
the poles is connected to earth and with voltage up to 1 500 V DC;
NOTE 2 There are DC networks with other configurations or with more than 2 poles (for example networks with
earth and both a positive and a negative pole).
• have all functional elements, including add-on modules, enclosed in, or forming a single
meter case with the exception of indicating displays;
• operate with integrated or detached indicating displays, or without an indicating display;
• be installed in a specified matching socket or rack;
• optionally, provide additional functions other than those for measurement of electrical
energy.
The electricity metering equipment covered by this document may be used for measuring DC
electrical energy in the following, or similar, application areas:
• in EV (electrical vehicle) charging stations or in EV charging infrastructures, if the
measurement is placed on the DC side;
• in information technology (IT) server farms;
• in DC supply points for communication equipment;
• in low voltage DC networks for residential or commercial areas, if the measurement is placed
on the DC side;
• in solar PV (photovoltaic) systems where DC power generation is measured;
• in DC supply points for public transport networks (e.g. trolleybus, etc.).
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 only if such meters and
their LPITs are tested together and meet the requirements for directly connected meters.
NOTE 3 Modern electricity meters typically contain additional functions such as measurement of voltage magnitude,
current magnitude, power, etc.; measurement of power quality parameters; load control functions; delivery, time,
test, accounting, recording functions; data communication interfaces and associated data security functions. The
relevant standards for these functions may apply in addition to the requirements of this document. However, the
requirements for such functions are outside the scope of this document.

– 8 – IEC 62053-41:2021 © IEC 2021
This document does not apply to:
• meters for which the voltage between the two poles, where one of the poles is connected to
earth, exceeds 1 500 V DC;
• meters to be used in networks other than with two poles in which one of the poles is
connected to earth;
• meters intended for connection with low power instrument transformers (LPITs as defined
in the IEC 61869 series) when tested without such transformers;
• metering systems comprising multiple devices physically (except LPITs) remote from one
another;
• portable meters;
NOTE 4 Portable meters are meters that are not permanently connected.
• meters used in rolling stock, vehicles, ships and airplanes;
• laboratory and meter test equipment;
• reference standard meters;
• data interfaces to the register of the meter;
• matching sockets or racks used for installation of electricity metering equipment;
• any additional functions provided in electrical energy meters.
This document does not cover measures for detection and prevention of fraudulent attempts to
compromise a meter’s performance (tampering).
NOTE 5 Nevertheless, specific tampering detection and prevention requirements, and test methods, as relevant for
a particular market are subject to agreement between the manufacturer and the purchaser.
NOTE 6 Specifying requirements and test methods for fraud detection and prevention would be counterproductive,
as such specifications would provide guidance for potential fraudsters.
NOTE 7 There are many methods of tampering with meters reported from various markets; designing meters to
detect and prevent all kinds of tampering would lead to unjustified increase in costs of meter design, verification and
validation.
NOTE 8 Billing systems, such as, smart metering systems, are capable of detecting irregular consumption patterns
and irregular network losses which enable discovery of suspected meter tampering.
NOTE 9 This document does not specify emission requirements, these are specified in IEC 62052-11:2020, 9.3.14.
NOTE 10 DC meters for rolling stock are covered by other IEC standards, e.g., from TC 9 for railway applications:
IEC 62888-1:2018, IEC 62888-2:2018, IEC 62888-3:2018, IEC 62888-4:2018, IEC 62888-5:2018.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 61000-4-19:2014, Electromagnetic compatibility (EMC) – Part 4-19: Testing and
measurement techniques – Test for immunity to conducted, differential mode disturbances and
signalling in the frequency range 2 kHz to 150 kHz at a.c. power ports
IEC 62052-11:2020, Electricity metering equipment – General requirements, tests and test
conditions – Part 11: Metering equipment

3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 62052-11:2020, as
well as the following, apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia website: http://www.electropedia.org/
• ISO Online Browsing Platform website: http://www.iso.org/obp
3.1
direct current system
DC system
electrical system fed by unidirectional voltage
[SOURCE: IEC 60050-601:1985, 601-01-04]
3.2
direct current
electric current that is time-independent or, by extension, periodic current the direct component
of which is of primary importance
Note 1 to entry: For the qualifier DC, see IEC 60050-151:2001, 151-15-02.
[SOURCE: IEC 60050-131:2002, 131-11-22]
3.3
direct voltage
voltage that is time-independent or, by extension, periodic voltage the direct component of
which is of primary importance
[SOURCE: IEC 60050-131:2002, 131-11-23]
3.4
DC power
product of the direct voltage and the direct current (mean values)
[SOURCE: IEC 60050-551:1998, 551-17-09]
3.5
DC energy meter
instrument intended to measure DC energy
3.6
DC energy
electrical energy transformable into some other form of energy
Note 1 to entry: The coherent SI unit of active energy is joule, J. Another unit is watt hour. Its multiple, kilowatt
hour, kWh, is commonly used for billing consumers of electric energy and is therefore indicated on electric energy
meters.
Note 2 to entry: For pure DC signals, the DC energy is equal to the active energy which is the time integral of the
DC power as defined in 3.1.25 of IEC 62052-11:2020.

– 10 – IEC 62053-41:2021 © IEC 2021
4 Standard electrical values
4.1 Voltages
4.1.1 Nominal voltages
The values given in IEC 62052-11:2020 apply.
4.1.2 Voltage ranges
The values given in IEC 62052-11:2020 apply.
4.2 Currents
4.2.1 Nominal current
The values given in IEC 62052-11:2020 apply.
4.2.2 Starting current
The requirements and acceptance criteria of IEC 62052-11:2020 apply, see Table 1.
Table 1 – Starting current
Meters for Starting current I
st
class 0,5 class 1
Direct connection 0,004 I 0,004 I
n n
4.2.3 Minimum current
The requirements and acceptance criteria of IEC 62052-11:2020 apply, see Table 2.
Table 2 – Minimum current
Meters for Minimum current I
min
class 0,5 and class 1
Direct connection 0,05 I
n
4.2.4 Maximum current
The requirements and acceptance criteria of IEC 62052-11:2020 apply.
4.3 Power consumption
The power consumption in the voltage, current and auxiliary power supply circuits shall be
determined at reference conditions given in 7.1 by any suitable method. The maximum
uncertainty of the measurement of the power consumption shall not exceed 5 %.
The power consumption for the voltage and current circuits measured at reference temperature
should not exceed the values shown in Table 3.
In case of meters specified for multiple values of voltage or current, the measurements shall be
conducted using the values resulting in the worst case (highest) power consumption of the
meter.
Table 3 – Power consumption
Meter circuit Power consumption
Voltage circuit 0,5 W
Current circuit
120 mW/A · I
max
when measured at maximum current I
max
Auxiliary power supply measured at nominal
not specified
voltage of the auxiliary power supply

NOTE Auxiliary supply: The total power required is subject to an agreement between the manufacturer and the
purchaser. A common value is 2 W or 2 VA.
5 Construction requirements
The requirements, test conditions and procedures, and acceptance criteria of
IEC 62052-11:2020 apply.
6 Meter marking and documentation
The requirements of IEC 62052-11:2020 apply, except AC meter specific items, e.g. frequency.
7 Accuracy requirements
7.1 General test conditions
The requirements, test conditions and procedures, and acceptance criteria of
IEC 62052-11:2020 apply, except that the requirements for phase sequence, voltage unbalance
and waveform of Table 10 of IEC 62052-11:2020 do not apply.
7.2 Methods of accuracy verification
The requirements, test conditions and procedures, and acceptance criteria of
IEC 62052-11:2020 apply.
7.3 Measurement uncertainty
The requirements, test conditions and procedures, and acceptance criteria of
IEC 62052-11:2020 apply.
7.4 Meter constant
The requirements, test conditions and procedures, and acceptance criteria of
IEC 62052-11:2020 apply.
7.5 Initial start-up of the meter
The requirements, test conditions and procedures, and acceptance criteria of
IEC 62052-11:2020 apply.
7.6 Test of no-load condition
The requirements, test conditions and procedures, and acceptance criteria of
IEC 62052-11:2020 apply.
– 12 – IEC 62053-41:2021 © IEC 2021
7.7 Starting current test
The requirements, test conditions and procedures, and acceptance criteria of
IEC 62052-11:2020 apply.
7.8 Repeatability test
The requirements, test conditions and procedures, and acceptance criteria of
IEC 62052-11:2020 apply.
7.9 Limits of error due to variation of the current
When the meter is operated under the reference conditions given in IEC 62052-11:2020, 7.1,
the percentage errors shall not exceed the limits for the relevant accuracy class given in
Table 4.
If the meter is designed for the measurement of energy in both directions, the values in Table 4
shall apply for each direction.
Table 4 – Acceptable percentage error limits
Acceptable percentage error limits for
meters of class
Value of current
0,5 1
I ≤ I < 0,1 I
±1,0 ±1,5
min n
0,1 I ≤ I ≤ I
±0,5 ±1,0
n max
7.10 Limits of error due to influence quantities
Tests and test conditions given in IEC 62052-11:2020, 7.1 apply.
When the current is held constant as specified in Table 5, and any single influence quantity is
applied one at a time, with the meter otherwise operated at reference conditions as specified in
IEC 62052-11:2020, 7.1, the variation in percentage error relative to the intrinsic error shall not
exceed the limits for the relevant class indexes given in Table 5.
The variation in percentage error induced by the influence quantities may vary depending on
the value of the test current. The variation in percentage error in Table 5 is given for the
specified values or ranges of the test current, but the testing should be performed at the
recommended values of test current given in Table 5.

Table 5 – Acceptable limits of variation in percentage error due to influence quantities
Specified range or Acceptable limits of
Test clause in value and variation in percentage
Influence quantity IEC 62052- recommended error for meters of class
11:2020 value of test
0,5 1
current
Radiated, radio-frequency, electromagnetic
I
9.3.5 2,0 2,0
n
field immunity test – test with current
I
Electrical fast transient/burst immunity test 9.3.6 2,0 4,0
n
Immunity to conducted disturbances,
I
9.3.7 2,0 2,0
n
induced by radio-frequency fields
I
External static magnetic fields 9.3.12 2,0 2,0
n
Power frequency magnetic field immunity
I
9.3.13 1,0 2,0
a n
test
I ≤ I ≤ I
min max
Voltage variation 9.4.3 0,25 0,5
(I )
n
I ≤ I ≤ I
min max
b
9.4.4 0,03 0,05
Ambient temperature variation
(I )
n
Reversed polarity (energy flow change e.g.
0,1 I
– 0,1 0,5
n
import to export) if applicable
I
Auxiliary voltage variation 9.4.8 0,1 0,2
min
I
Operation of auxiliary devices 9.4.9 0,1 0,2
min
I
Short-time overcurrents 9.4.10 1,0 1,5
n
c
I
9.4.11 0,5 0,7
Self-heating
max
I
Fast load current variations 9.4.12 1,0 2,0
n
d
I
8.3.3 0,25 0,5
Dry heat test
n
d
I
Cold test 8.3.4 0,25 0,5
n
d
I
Damp heat cyclic test 8.3.5 0,25 0,5
n
Test clause in
IEC 62053-41
Conducted differential mode current
I
9.2 2,0 4,0
n
disturbances for DC meters
a
The frequency used for this test is the AC mains frequency in the installations where the meter is intended to
be used. The product documentation should declare at which frequencies the meter has been tested.
b
These values shall be considered as mean temperature coefficients %/K.
c
The test shall be carried out for at least 1 h, or until the variation of error during 20 min does not exceed 0,2 %.
d
For these tests, the meter accuracy is measured before and after the test. The difference in percentage error
before and after the test shall not exceed the error limits specified in this table. These errors limits may be
interpreted as allowable meter accuracy drift induced by the specified test conditions.

7.11 Time-keeping accuracy
The requirements, test conditions and procedures, and acceptance criteria of
IEC 62052-11:2020 apply.
8 Climatic requirements
The requirements, test conditions and procedures, and acceptance criteria of
IEC 62052-11:2020 apply.
– 14 – IEC 62053-41:2021 © IEC 2021
9 Effects of external influences
9.1 General
The requirements, test conditions and procedures, and acceptance criteria of
IEC 62052-11:2020 apply. Table 13 and Table 14 of IEC 62052-11:2020 give an overview of
the requirements. For tests with acceptance criteria A, Table 5 of this document shall be used.
In addition, 9.2 specifies a specific test for conducted differential mode current disturbances for
DC meters. See also Annex A.
9.2 Conducted differential mode current disturbances for DC meters
The test is performed with disturbances in the current only; the test with voltage disturbances
is not required.
The test shall be carried out according to IEC 61000-4-19:2014, with the exceptions specified
below, under the conditions specified in 7.1 of IEC 62052-11:2020, and the following additional
conditions:
The meter shall be in operating condition:
a) Voltage circuits and auxiliary power supply circuits energized with their lowest specified
nominal voltages;
b) The current circuits shall be carrying the value of the current given in Table 5;
The differential test current I shall be applied to:
Diff
c) Mains port:
1) 10 Hz to 2 kHz: I = 2 A,
Diff
2) 2 kHz to 150 kHz: I = 3 A.
Diff
These test levels and frequency ranges are different from IEC 61000-4-19;
d) The test waves profiles "CW (Continuous Wave) pulses with pause" and "rectangularly
modulated pulses" shall be used (IEC 61000-4-19:2014, 5.2.2 and 5.2.3);
e) I shall be generated with a tolerance of ±5 % of the selected level during the test;
Diff
f) Frequency step shall be 1 %;
g) The dwell time shall be as specified in 9.3.1.2.2 of IEC 62052-11:2020.
Acceptance criteria: A, except for the indicating display function, which shall be evaluated
according to criteria B (according to the definitions of acceptance criteria in 9.2 of
IEC 62052-11:2020).
10 Type test
The requirements of IEC 62052-11:2020 apply.

Annex A
(informative)
Differential mode current disturbance test
Meters installed in the mains supply shall withstand differential mode current disturbances in
the range 2 kHz to 150 kHz and are described in IEC 62052-11:2020. These disturbances are
generated by power electronic equipment such as inverters and power line communication
(PLC) systems.
DC meters for battery charging applications shall withstand additional disturbances. A typical
use case is described in IEC 61851-23:2014.
In IEC 61851-23:2014, Table 101 – Current ripple limit of DC EV supply equipment, differential
mode current disturbance levels in the range from below 10 Hz to 150 kHz are listed.
The levels differ from the levels mentioned in IEC 62052-11:2020 which are based on
IEC 61000-4-19:2014. For DC meters, the tables are adapted to meet both requirements
excluding frequencies below 10 Hz. The levels in IEC 61851-23:2014, Table 113 are peak-to-
peak values which have been converted to RMS values in Table A.1 which compares the levels
of the three IEC standards.
Table A.1 – Overview of differential mode current
disturbances in different IEC standards
Standard Below 10 Hz 10 Hz to 2 kHz 2 kHz to 5 kHz 5 kHz to 30 kHz 30 kHz to 150 kHz
IEC 62052-11 ------- ------- 3 A 3 A 1,5 A
IEC 61851-23 0,53 A 2,12 A 2,12 A 3,18 A 3,18 A
IEC 62053-41 ------- 2 A 3 A 3 A 3 A

For DC meters, frequencies up to 10 Hz are regarded as being part of the measurement signal
and have been excluded. Above 10 Hz, the highest value (rounded to integers) in any frequency
band is applied. Thus, the requirements of both IEC 62052-11:2020 and IEC 61851-23:2014
are covered.
– 16 – IEC 62053-41:2021 © IEC 2021
Bibliography
IEC 60050-131:2002, International Electrotechnical Vocabulary (IEV) – Part 131: Circuit theory
IEC 60050-131:2002/AMD1:2008
IEC 60050-131:2002/AMD2:2013
IEC 60050-131:2002/AMD3:2019
IEC 60050-151:2001, International Electrotechnical Vocabulary (IEV) – Part 151: Electrical and
magnetic devices
IEC 60050-151:2001/AMD1:2013
IEC 60050-151:2001/AMD2:2014
IEC 60050-151:2001/AMD3:2019
IEC 60050-151:2001/AMD4:2020
IEC 60050-551:1998, International Electrotechnical Vocabulary (IEV) – Part 551: Power
electronics
IEC 60050-601:1985, International Electrotechnical Vocabulary (IEV) – Part 601: Generation,
transmission and distribution of electricity – General
IEC 60050-601:1985/AMD1:1998
IEC 60050-601:1985/AMD2:2020
IEC 61851-23:2014, Electric vehicle conductive charging system – Part 23: DC electric vehicle
charging station
IEC 61869 (all parts), Instrument transformers
IEC 62888-1:2018, Railway applications – Energy measurement on board trains – Part 1:
General
IEC 62888-2:2018, Railway applications – Energy measurement on board trains – Part 2:
Energy measurement
IEC 62888-3:2018, Railway applications – Energy measurement on board trains – Part 3: Data
handling
IEC 62888-4:2018, Railway applications – Energy measurement on board trains – Part 4:
Communication
IEC 62888-5:2018, Railway applications – Energy measurement on board trains – Part 5:
Conformance test
___________
– 18 – IEC 62053-41:2021 © IEC 2021
SOMMAIRE
AVANT-PROPOS . 19
INTRODUCTION . 21
1 Domaine d'application . 23
2 Références normatives . 24
3 Termes et définitions . 25
4 Valeurs électriques normales . 26
4.1 Tensions . 26
4.1.1 Tensions nominales . 26
4.1.2 Plages de tensions . 26
4.2 Courants . 26
4.2.1 Courant nominal . 26
4.2.2 Courant de démarrage . 26
4.2.3 Courant minimal . 26
4.2.4 Courant maximal . 26
4.3 Consommation . 27
5 Exigences de construction . 27
6 Marquage et documentation du compteur . 27
7 Exigences de précision . 27
7.1 Conditions générales des essais . 27
7.2 Méthodes de vérification de la précision . 27
7.3 Incertitude de mesure . 27
7.4 Constante du compteur . 28
7.5 Mise en fonctionnement du compteur . 28
7.6 Essai de marche à vide . 28
7.7 Essai de courant de démarrage . 28
7.8 Essai de répétabilité . 28
7.9 Limites des erreurs dues à la variation du courant . 28
7.10 Limites des erreurs dues aux grandeurs d'influence . 28
7.11 Exactitude de l'horloge . 29
8 Exigences climatiques . 30
9 Effets des influences externes . 30
9.1 Généralités . 30
9.2 Perturbations de courant conduites en mode différentiel pour les compteurs
en courant continu . 30
10 Essai de type . 30
Annexe A (informative) Essai de perturbations de courant en mode différentiel . 31
Bibliographie . 32

Tableau 1 – Courant de démarrage . 26
Tableau 2 – Courant minimal . 26
Tableau 3 – Consommation .
...