oSIST prEN IEC 62053-24:2026

SLOVENSKI STANDARD
01-julij-2026
Oprema za merjenje električne energije - Posebne zahteve - 24. del: Statični števci
osnovne komponente jalove energije (razredi 0,5 S, 1 S in 1, 2 in 3)
Electricity metering equipment - Particular requirements - Part 24: Static meters for
fundamental component reactive energy (classes 0,5S, 1S, 1, 2 and 3)
Elektrizitätszähler - Besondere Anforderungen - Teil 24: Elektronische
Grundschwingungs-Blindverbrauchszähler der Genauigkeitsklassen 0,5 S, 1 S, 1, 2 und
Equipement de comptage de l'électricité - Exigences particulières - Partie 24: Compteurs
statiques d'énergie réactive de composante fondamentale (classes 0,5 S, 1 S, 1, 2 et 3)
Ta slovenski standard je istoveten z: prEN IEC 62053-24:2026
ICS:
17.220.20 Merjenje električnih in Measurement of electrical
magnetnih veličin and magnetic quantities
91.140.50 Sistemi za oskrbo z elektriko Electricity supply systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

13/2003/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 62053-24 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2026-06-05 2026-08-28
SUPERSEDES DOCUMENTS:
13/1951/CD, 13/1997/CC
IEC TC 13 : ELECTRICAL ENERGY MEASUREMENT AND CONTROL
SECRETARIAT: SECRETARY:
Hungary Mr Bela Bodi
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):
TC 85,ACEC
ASPECTS CONCERNED:
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
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the final stage for submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Electricity metering equipment - Particular requirements - Part 24: Static meters for
fundamental component reactive energy (classes 0,5S, 1S, 1, 2 and 3)

PROPOSED STABILITY DATE: 2032
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IEC CDV 62053-24 © IEC 2026
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IEC CDV 62053-24 © IEC 2026
CONTENTS
CONTENTS . 1
FOREWORD . 3
INTRODUCTION . 6
1 Scope . 8
2 Normative references . 9
3 Terms and definitions . 10
4 Standard electrical values . 10
4.1 Voltages . 10
4.2 Currents . 10
4.2.1 Nominal current signal . 10
4.2.2 Starting current signal . 10
4.2.3 Minimum current signal . 10
4.2.4 Transitional current signal . 11
4.2.5 Maximum current signal . 11
4.3 Frequencies . 11
4.4 Power consumption. 11
5 Construction requirements . 11
6 Meter marking and documentation . 11
7 Accuracy requirements . 11
7.1 General test conditions . 11
7.2 Methods of accuracy verification . 12
7.3 Measurement uncertainty . 12
7.4 Meter constant . 12
7.5 Initial start-up of the meter . 12
7.6 Test of no-load condition . 12
7.7 Starting current test . 12
7.8 Repeatability test . 12
7.9 Limits of error due to variation of the current signal . 12
7.10 Limits of error shift due to influence quantities . 13
7.11 Time-keeping accuracy . 16
8 Climatic requirements . 16
9 The effects of external influences . 16
10 Type test . 16
Annex A (informative) Comparison of relative error limits at reference conditions for
meters of classes 0,5 S, 1 S, 1, 2 and 3 . 17
Annex B (informative) Influence of the phase displacement of current and voltage
transformers on reactive energy measurement . 19
Annex C (informative) Treatment of harmonics and tests for harmonics . 21
C.1 Non-sinusoidal conditions and reactive power definition . 21
C.2 Tests for accuracy under non-sinusoidal conditions . 21
C.3 Fifth harmonic test . 22
Bibliography . 23

Figure A.1 – Comparison of relative error limits, transformer-operated (S) and directly
connected meters, with I = 5 A, I = 10 A, power factor = 1,0 . 17
n max
IEC CDV 62053-24 © IEC 2026
Figure A.2 – Comparison of relative error limits, transformer-operated (S) and directly
connected meters, with I = 5 A, I = 10 A, at power factor = 0,5 inductive and 0,8
n max
capacitive . 18

Table 1 – Starting current signal . 10
Table 2 – Minimum current signal . 10
Table 3 – Transitional current signal . 11
Table 4 – Maximum current signal . 11
Table 5 – Limits of relative error at reference conditions (single-phase meters and
poly-phase meters with balanced loads or single-phase loads) . 12
Table 6 – Limits of relative error shift due to influence quantities . 14
Table B.1 – Phase displacements for current transformer connected meters without
voltage transformers and corresponding maximum measurement errors for reactive
energy . 19
Table B.2 – Phase displacements for current and voltage transformer connected
meters and corresponding maximum measurement errors for reactive energy . 19
Table C.1 – Overview of the execution of the test Harmonics in the current and voltage
th
circuits – 5 harmonic test (specified in IEC 62052-11 edition 3 CDV:2026, 9.4.2.2) in
the different particular requirements standards for AC electrical energy meters . 22

IEC CDV 62053-24 © IEC 2026
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Electricity metering equipment - Particular requirements -
Part 24: Static meters for fundamental component reactive energy
(classes 0,5S, 1S, 1, 2 and 3)

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for
standardization comprising all national electrotechnical committees (IEC National Committees).
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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) IEC draws attention to the possibility that the implementation of this document may involve
the use of (a) patent(s). IEC takes no position concerning the evidence, validity or applicability
of any claimed patent rights in respect thereof. As of the date of publication of this document,
IEC had not notice of (a) patent(s), which may be required to implement this document.
IEC CDV 62053-24 © IEC 2026
However, implementers are cautioned that this may not represent the latest information, which
may be obtained from the patent database available at https://patents.iec.ch and 9) IEC draws
attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed
patent rights in respect thereof. As of the date of publication of this document, IEC had not
notice of (a) patent(s), which may be required to implement this document. However,
implementers are cautioned that this may not represent the latest information, which may be
obtained from the patent database available at https://patents.iec.ch and www.iso.org/patents .
IEC shall not be held responsible for identifying any or all such patent rights. . IEC shall not be
held responsible for identifying any or all such patent rights.
IEC 62053-24 has been prepared by IEC technical committee 13: Electrical energy
measurement and control. It is an International Standard.
This third edition cancels and replaces the second edition published in 2020. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) Normative references have been updated;
b) Transducer-operated meters included in scope (tested without transducers);
c) The transitional current has been introduced;
d) The starting current, minimum current and maximum current have been expressed as
fractions of the transitional current;
e) The test "Ripple on DC supply voltage" has been introduced;
f) Figures in Annex A have been revised.
The text of this International Standard is based on the following documents:
Draft Report on voting
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 [change
language if necessary].
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/publications.
A list of all parts in the IEC 62053 series, published under the general title Electricity metering
equipment – Particular requirements, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
– reconfirmed,
– withdrawn, or
– revised.
IEC CDV 62053-24 © IEC 2026
NOTE The attention of National Committees is drawn to the fact that equipment manufacturers and testing
organizations may need a transitional period following publication of a new, amended or revised IEC publication in
which to make products in accordance with the new requirements and to equip themselves for conducting new or
revised tests.
It is the recommendation of the committee that the content of this publication be adopted for implementation nationally
not earlier than 2 years from the date of publication.
IEC CDV 62053-24 © IEC 2026
INTRODUCTION
This part of IEC 62053 is to be used with relevant parts of the IEC 62052, IEC 62058 and
IEC 62059 series, Electricity metering equipment, with the IEC 62055 series, Electricity
metering – Payment systems and with the IEC 62057 series, Electrical energy meters:
IEC 62052-11 edition 3 CDV:2026 , Electricity metering equipment – General requirements,
tests and test conditions – Part 11: Metering equipment
IEC 62052-31:2024, Electricity metering equipment – General requirements, tests and test
conditions – Part 31: Product safety requirements and tests
IEC 62052-41:2022, Electricity metering equipment – General requirements, tests and test
conditions – Part 41: Energy registration methods and requirements for multi-energy and multi-
rate meters
IEC 62053-21:202X, Electricity metering equipment – Particular requirements – Part 21: Static
meters for AC active energy (classes 0,5, 1 and 2)
IEC 62053-22:202X, Electricity metering equipment – Particular requirements – Part 22: Static
meters for AC active energy (classes 0,1 S, 0,2 S and 0,5 S)
IEC 62053-23:202X, Electricity metering equipment – Particular requirements – Part 23: Static
meters for reactive energy (classes 2 and 3)
IEC 62053-41:2021, Electricity metering equipment – Particular requirements – Part 41: Static
meters for DC energy (classes 0,5 and 1)
IEC 62055-31:2022, Electricity metering – Payment systems – Part 31: Particular requirements
– Static payment meters for active energy (classes 1 and 2)
IEC 62057-1:2023, Electrical energy meters – Test equipment, techniques and procedures –
Part 1: Stationary meter test units (MTUs)
IEC 62057-3:2024, Electrical energy meters – Test equipment, techniques and procedures –
Part 3: Automatic meter testing system (AMTS)
IEC 62058-11:2008, Electricity metering equipment (AC) – Acceptance inspection – Part 11:
General acceptance inspection methods
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
IEC 62059-32-1:202X, Electricity metering equipment – Dependability – Part 32-1: Durability –
Testing of the stability of metrological characteristics by applying elevated temperature
This part is a standard for type testing electricity meters. It covers the particular requirements
for meters, being used indoors and outdoors in large quantities worldwide. It does not deal with
special implementations (such as metering-part and/or displays in separate housings).
IEC CDV 62053-24 © IEC 2026
This document is intended to be used in conjunction with IEC 62052-11 edition 3 CDV:2026
and with IEC 62052-31:2024. When any requirement in this document concerns an item already
covered in IEC 62052-11 edition 3 CDV:2026 or in IEC 62052-31:2024, the requirements of this
document take precedence over the requirements of IEC 62052-11 edition 3 CDV:2026 or of
IEC 62052-31:2024.
The specifications and test levels in this document are regarded as minimum values for the
proper functioning of electricity measurement and load control equipment under normal working
conditions. For special applications, additional or extended specificat ions or test levels might
be necessary and are permitted but are neither identified nor prescribed in this document.
IEC CDV 62053-24 © IEC 2026
1 Scope
This part of IEC 62053 applies only to static var-hour meters of accuracy classes 0,5 S, 1 S, 1,
2 and 3 for the measurement of alternating current electrical reactive energy in 50 Hz or 60 Hz
networks and it applies to their type tests only.
Classes 0,5 S and 1 S are only defined for transformer-operated and transducer-operated
meters.
This document uses a conventional definition of reactive energy where the reactive power and
energy is calculated from the fundamental frequency components of the currents and voltages
only (see Clause 3).
NOTE 1 This differs from IEC 62053-23, where reactive power and energy is only defined for sinusoidal signals. In
this document reactive power and energy is defined for all periodic signals. Reactive power and energy is defined in
this way to achieve proper reproducibility of measurements with meters of different designs. With this definition,
reactive power and energy reflects the generally unnecessary current which can be compensated with capacitors
rather than the total unnecessary current.
NOTE 2 For other general requirements, such as safety, dependability, etc., see the relevant standards in the
IEC 62052 or IEC 62059 series.
This document applies to electricity metering equipment designed to:
– measure and control electrical energy on electrical networks (mains) with voltage up to
1 000 V AC;
NOTE 3 For AC electricity meters, the voltage mentioned above is the line-to-neutral voltage derived from nominal
voltages. See IEC 62052-31:2024, Table 7.
– have all functional elements, including add-on modules, enclosed in, or forming a single
meter case with exception of indicating displays;
– operate with integrated or detached indicating displays, or without an indicating display;
– be installed in a specified matching socket or rack;
– optionally, provide additional functions other than those for measurement of electrical
energy.
Meters designed for operation with external transducers may be tested for compliance with this
document:
– as directly connected meters, when such meters and their transducers are tested together;
– as transducer-operated meters when such meters are tested without transducers.
NOTE 4 When transducer-operated meters are tested without transducers, the reference measurements may be
performed at the input terminals of the meter. This may require, for example, a traceable reference standard meter
(standard, French: étalon) with inputs compatible with mV or mA level transducer output signals. Another practical
way to test transducer-operated meters is to perform the reference measurement at the input terminals of calibrated
reference transducers. This way, the reference standard meters, and test current sources may be the same as those
used for testing of transformer-operated meters. The transformation ratio, metrological characteristics and
uncertainty of the reference transducers are known and their influence can be removed by post -processing the test
data. The determination of the appropriate test methodology is left to the expertise of the testing laboratory.
NOTE 5 Modern electricity meters typically contain additional functions such as measurement of voltage magnitude,
current magnitude, power, frequency, power factor, etc.; measurement of power quality parameters; load control
functions; delivery, time, test, accounting, recording functions; data communication interfaces and associated data
security functions. The relevant standards for these functions may apply in addition to the requirements of this
document. However, the requirements for such functions are outside the scope of this document.
NOTE 6 Product requirements for power metering and monitoring devices (PMDs) and measurement functions such
as voltage magnitude, current magnitude, power, frequency, etc., are covered in IEC 61557-12. However, devices
compliant with IEC 61557-12 are not intended to be used as billing meters unless they are also compliant with IEC
62052-11 edition 3 CDV:2026 and one or more relevant IEC 62053-xx accuracy class standards.
NOTE 7 Product requirements for power quality instruments (PQIs) are covered in IEC 62586-1. Requirements for
power quality measurement techniques (functions) are covered in IEC 61000-4-30. Requirements for testing of the
power quality measurement functions are covered in IEC 62586-2.
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