oSIST prEN IEC 62052-11:2026

SLOVENSKI STANDARD
01-julij-2026
Oprema za merjenje električne energije - Splošne zahteve, preskusi in preskusni
pogoji - 11. del: Merilna oprema
Electricity metering equipment - General requirements, tests and test conditions - Part
11: Metering equipment
Elektrizitätszähler - Allgemeine Anforderungen, Prüfungen und Prüfbedingungen - Teil
11: Messeinrichtungen
équipement de comptage de l'électricité - Exigences générales, essais et conditions
d'essai - Partie 11: équipement de comptage
Ta slovenski standard je istoveten z: prEN IEC 62052-11:2026
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.

13/1999/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 62052-11 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2026-06-05 2026-08-28
SUPERSEDES DOCUMENTS:
13/1947/CD, 13/1994/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
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of
which they are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some
Countries” clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is
the final stage for submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Electricity metering equipment - General requirements, tests and test conditions - Part 11:
Metering equipment
PROPOSED STABILITY DATE: 2032
NOTE FROM TC/SC OFFICERS:
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.

Link to Committee Draft for Vote (CDV) online document:
Click here
How to access
This link leads you to the Online Standards Development (OSD) platform for National Mirror
Committee’s (NMC) comments. The project draft may be found further down this document.

Resource materials
We recommend NCs to review the available materials to better understand the member commenting
on the OSD platform. This includes the:
• OSD NC roles overview
• How to add and submit comments to the IEC

Contact
Should you require any assistance, please contact the IEC IT Helpdesk.

IEC CDV 62052-11 © IEC 2026
CONTENTS
CONTENTS . 1
FOREWORD . 8
INTRODUCTION . 11
1 Scope . 13
2 Normative references . 14
3 Terms and definitions . 17
3.1 General definitions . 18
3.2 Definitions related to the functional elements . 23
3.3 Definitions of meter ports . 27
3.4 Definitions of mechanical elements . 29
3.5 Definitions related to measurements . 31
3.6 Definitions related to external influences . 35
3.7 Definition of tests . 38
3.8 Definitions related to meter marking and symbols . 38
4 Nominal electrical values . 40
4.1 Voltages . 40
4.1.1 Nominal voltages signals . 40
4.1.2 Voltage signal ranges . 41
4.2 Currents . 41
4.2.1 Nominal current signals . 41
4.2.2 Starting current signal . 42
4.2.3 Minimum current signal . 42
4.2.4 Transitional current signal . 42
4.2.5 Maximum current signal . 42
4.2.6 Current signal ranges . 43
4.3 Frequencies . 43
4.3.1 Nominal frequencies . 43
4.3.2 Frequency ranges . 43
4.4 Power consumption. 43
5 Construction requirements and tests. 44
5.1 General . 44
5.2 Mechanical tests . 45
5.2.1 Acceptance criteria . 45
5.2.2 Shock test . 45
5.2.3 Vibration test . 45
5.3 Window . 46
5.4 Terminals - Terminal block(s) - Protective conductor terminal . 46
5.5 Sealing provisions . 46
5.5.1 General . 46
5.5.2 Sealing of meter case . 46
5.5.3 Sealing of meter terminal covers. 46
5.5.4 Sealing of detached displays . 47
5.5.5 Sealing of meter configuration . 47
5.6 Display of measured values . 47
5.6.1 General . 47
5.6.2 Meters without displays . 48
IEC CDV 62052-11 © IEC 2026
5.6.3 Meters with displays . 48
5.7 Storage of measured values . 49
5.8 Pulse outputs . 49
5.8.1 General . 49
5.8.2 Optical test output . 49
5.8.3 Electrical pulse outputs . 50
5.8.4 Operation indicator . 51
5.9 Electrical pulse inputs . 51
5.9.1 General characteristics . 51
5.9.2 Functional tests of electrical pulse inputs. 51
5.10 Auxiliary power supply . 52
6 Meter marking and documentation . 52
6.1 Meter accuracy class marking . 52
6.2 Meter marking . 52
6.3 Connection diagrams and terminal marking . 57
6.4 Symbols . 57
6.4.1 General . 57
6.4.2 Symbols for the measuring elements . 57
6.4.3 Symbols for transformer-operated or transducer-operated meters . 58
6.4.4 Identification of the displayed information . 58
6.4.5 Marking of the measured quantity . 58
6.4.6 Symbols of principal units used for meters (see Table 9) . 59
6.4.7 Symbols for auxiliary devices. 59
6.4.8 Symbols for communication ports . 59
6.5 Documentation . 59
6.5.1 Installation manuals . 59
6.5.2 Instruction for use . 60
7 Metrological performance requirements and tests . 60
7.1 General test conditions . 60
7.2 Methods of accuracy verification . 62
7.3 Measurement uncertainty . 62
7.4 Meter constant . 63
7.5 Initial start-up time of the meter . 64
7.6 Test of no-load condition . 64
7.7 Starting current signal test . 65
7.8 Repeatability test . 65
7.9 Limits of error due to variation of the current . 66
7.10 Limits of error shift due to influence quantities . 66
7.11 Time-keeping accuracy . 66
8 Climatic requirements and tests . 66
8.1 General . 66
8.2 Environmental conditions . 66
8.3 Tests of the effects of the climatic environments . 67
8.3.1 General test requirements . 67
8.3.2 Acceptance criteria . 67
8.3.3 Dry heat test . 67
8.3.4 Cold test . 68
8.3.5 Damp heat cyclic test . 68
8.3.6 Protection against solar radiation . 68
IEC CDV 62052-11 © IEC 2026
8.4 Durability . 69
9 The effects of external influence quantities and disturbances . 69
9.1 General . 69
9.2 Acceptance criteria . 71
9.3 Electromagnetic compatibility (EMC) . 72
9.3.1 General . 72
9.3.2 Voltage dips, short interruptions, and DC ripple . 74
9.3.3 Electrostatic discharge immunity test . 76
9.3.4 Radiated, radio-frequency, electromagnetic field immunity test - test
without current signal . 77
9.3.5 Radiated, radio-frequency, electromagnetic field immunity test - test
with current signal . 77
9.3.6 Electrical fast transient/burst immunity test . 78
9.3.7 Immunity to conducted disturbances, induced by radio-frequency fields . 78
9.3.8 Test for immunity to conducted, differential mode current disturbances . 79
9.3.9 Surge immunity test . 80
9.3.10 Ring wave immunity test . 83
9.3.11 Damped oscillatory wave immunity test . 84
9.3.12 External static magnetic fields . 85
9.3.13 Power frequency magnetic field immunity test . 86
9.3.14 Emission requirements . 86
9.4 Tests of immunity to other influence quantities . 87
9.4.1 General . 87
9.4.2 Harmonics in the current and voltage circuits . 87
9.4.3 Voltage signal variation . 88
9.4.4 Ambient temperature variation . 89
9.4.5 Interruption of phase voltage . 89
9.4.6 Frequency variation . 90
9.4.7 Reversed phase sequence. 90
9.4.8 Auxiliary voltage variation . 91
9.4.9 Operation of auxiliary devices . 91
9.4.10 Short-time overcurrents . 91
9.4.11 Self-heating . 92
9.4.12 Fast load current variations . 93
9.4.13 Earth fault . 93
10 Type test . 94
10.1 Test conditions . 94
10.2 Type test report . 94
Annex A (normative) Optical test output . 96
Annex B (normative) Class A, B and C electrical pulse outputs and inputs . 98
B.1 Electrical characteristics of pulse outputs and inputs . 98
B.1.1 Electrical characteristics of pulse outputs . 98
B.1.2 Electrical output pulse waveform . 98
B.1.3 Test of electrical pulse outputs . 99
B.1.4 Test of electrical pulse inputs . 99
B.2 Class C electronic pulse outputs . 100
B.2.1 Characteristics of class C electronic pulse outputs . 100
Annex C (normative) Electrical pulse output for special applications and long
distances according to IEC 60381-1:1982 . 102
IEC CDV 62052-11 © IEC 2026
C.1 Operating conditions and output pulse waveform . 102
C.2 Test of pulse output for special applications and long distances . 103
C.3 Test of pulse input for special applications and long distances . 103
Annex D (informative) Meter symbols and markings . 105
Annex E (informative) Meter ports . 115
Annex F (informative) Test set-up for EMC tests . 119
Annex G (normative) Test circuit diagrams for testing influence of harmonics and
interharmonics . 121
Annex H (informative) Short time overcurrent test waveform . 128
Annex I (informative) Fast load current variation test . 129
Annex J (normative) Electromagnet for testing the influence of externally produced
magnetic fields . 130
J.1 Permanent magnet and electromagnet for testing the influence of external
static magnetic field . 130
J.2 Electromagnet for testing the influence of external static magnetic field with
magneto-motive force of 1 000 At (ampere-turns) . 130
Annex K (normative) Test circuit diagram for the test of immunity to earth fault . 132
Annex L (informative) Meter current signal range . 133
Annex M (informative) Application to Multi-Branch Circuit Energy Meters . 134
M.1 Overview . 134
M.2 Definitions . 134
M.3 General . 134
M.4 Cross-channel influences . 135
M.5 Channel configuration and sealing for multi-branch meters . 135
M.6 Verification for multi-branch meters . 135
Annex N (informative) Testing of transducer-operated meters . 136
N.1 General . 136
N.2 Transducer-operated meters tested with external transducers, as directly
connected meters . 136
N.2.1 General . 136
N.2.2 Example test setup for testing transducer-operated meters as directly
connected meters . 137
N.3 Transducer-operated meters tested with reference transducers . 137
N.3.1 General . 137
N.3.2 Example test setup for testing transducer-operated meters with
reference transducers . 138
N.4 Other methods of testing of transducer-operated meters . 139
N.4.1 Example test setup for testing transducer-operated meters with
simulated transducer signals . 139
Annex O (informative) Application of this standard to meters with detached displays . 140
Annex P (informative) Geometric representation of active and reactive power . 141
Annex Q (informative) Immunity to conducted common mode disturbances in the
frequency range from d.c to 150 kHz . 145
Annex R (informative) Mathematical definitions of the measured quantities . 146
R.1 General . 146
R.2 Abbreviations . 146
R.3 Voltage and current . 148
R.3.1 Voltage and current in the continuous time domain . 148
R.3.2 Voltage and current in the discrete time domain . 149
IEC CDV 62052-11 © IEC 2026
R.3.3 Voltage and current in the frequency domain . 149
R.4 Active power . 150
R.4.1 Active power in the continuous time domain . 150
R.4.2 Active power in the discrete time domain . 150
R.4.3 Active power in the frequency domain. 151
R.5 Active energy . 151
R.5.1 Active energy in the continuous time domain . 151
R.5.2 Active energy in the discrete time domain . 151
R.5.3 Active energy in the frequency domain . 152
R.5.4 Active energy in polyphase system . 152
R.6 Reactive power . 152
R.6.1 Fundamental reactive power in the frequency domain . 152
R.7 Reactive energy . 152
R.7.1 Fundamental reactive energy in the frequency domain . 152
R.7.2 Reactive energy in polyphase systems . 152
Bibliography . 153

Figure A.1 – Test arrangement for the optical test output . 96
Figure A.2 – Waveform of the optical test output . 96
Figure B.1 – Physical interface of the electrical pulse output . 98
Figure B.2 – Electrical output pulse waveform. 98
Figure B.3 – Pulse output test set-up . 99
Figure B.4 – Pulse input test set-up . 99
Figure B.5 – Non-isolated pulse output schematic . 100
Figure B.6 – Isolated pulse output schematic . 100
Figure B.7 – Electronic pulse output waveform . 101
Figure C.1 – Output pulse waveform . 102
Figure C.2 – Pulse output test set-up . 103
Figure C.3 – Pulse input test set-up . 104
Figure D.1 – Cross-phase connection of a var-hour meter with two measuring elements
in three-phase three-wire circuits . 109
Figure E.1 – Example: ports of a directly connected meter . 115
Figure E.2 – Example: ports of a transformer-operated meter . 116
Figure E.3 – Example: ports of a transducer-operated meter when type-tested with
transducers as a directly connected meter . 117
Figure E.4 – Example: ports of a transducer-operated meter when type-tested without
transducers . 118
Figure F.1 – Test set-up for the electrical fast transient/burst immunity test for
transformer-operated meters: each port (Mains, CT, HLV, ELV) is tested separately by
adding the coupling device to the respective port . 119
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 . 120
Figure G.1 – Test circuit diagram (informative, test of influence of interharmonics and
odd harmonics) on directly connected meter , transformer-operated meter , or
transducer-operated meter (current transducer with current output) . 121
Figure G.2 – Test circuit diagram (informative, test of influence of interharmonics and
odd harmonics) on transducer-operated meter (current transducer with voltage output) . 122
IEC CDV 62052-11 © IEC 2026
Figure G.3 – Burst-fired (integral cycle control) current signal waveform . 122
Figure G.4 – Informative distribution of interharmonic content of burst-fired current
signal waveform (the Fourier analysis is not complete) . 123
Figure G.5 – Phase fired waveform (odd harmonics) - 90° fired current signal waveform . 123
Figure G.6 – Informative distribution of harmonic content of 90° phase fired current
signal waveform (the Fourier analysis is not complete) . 124
Figure G.7 – Phase fired waveform (odd harmonics) - 45° fired current signal waveform . 124
Figure G.8 – Phase fired waveform (odd harmonics) - 135° fired current signal
waveform . 125
Figure G.9 – Test circuit diagram (informative) for half-wave rectification (DC and even
harmonics) . 125
Figure G.10 – Half-wave rectified current signal waveform (DC and even harmonics) . 126
Figure G.11 – Informative distribution of harmonic content of half-wave rectified current
signal waveform (the Fourier analysis is not complete) . 127
Figure J.1 – Electromagnet for testing the influence of external static magnetic field
with magneto-motive force of 1 000 At (ampere-turns) . 131
Figure K.1 – Circuit to simulate earth fault condition in phase 1 . 132
Figure K.2 – Voltages at the meter under test . 132
Figure L.1 – Meter current signal range . 133
Figure N.1 – Example test setup for testing transducer-operated meters as directly
connected meters . 137
Figure N.2 – Test setup for testing transducer-operated meters with external reference
transducers . 138
Figure N.3 – Test setup for testing transducer-operated meters with simulated
transducer signals . 139
Figure P.1 – Energy flow by quadrant [SOURCE: NEMA C12.31G-TR-2024:2024 [14]] . 141
Figure P.2 – Historical representation of energy flow by quadrant [SOURCE: NEMA
C12.31G-TR-2024:2024 [14]] . 142
Figure P.3 – Historical geometric representation [SOURCE: IEC 62053-23:2003 [21] ] . 143
Figure P.4 – Historical alternative geometric representation [SOURCE: IEC 62053-
23:2003 [21] ] . 144

Table 1 – Examples of constant C for different instrument transformer ratios . 39
Table 2 – Preferred nominal values of voltage signals . 40
Table 3 – Voltage ranges . 41
Table 4 – Preferred nominal values of current signals . 41
Table 5 – Current signal ranges . 43
Table 6 – Frequency ranges . 43
Table 7 – Maximum power consumption . 44
Table 8 – Marking and documentation requirements . 53
Table 9 – Symbols of principal units used for meters . 59
Table 10 – Voltage and current balance . 60
Table 11 – Reference conditions . 61
Table 12 – Repeatability test points . 65
Table 13 – Environmental conditions . 66
Table 14 – Summary of the tests of immunity to influence quantities . 70
IEC CDV 62052-11 © IEC 2026
Table 15 – Summary of the tests of immunity to disturbances . 70
Table 16 – Acceptance criteria . 71
Table 17 – Tests of immunity to dips and short interruptions of AC supply voltage . 74
Table 18 – Tests of immunity to dips and short interruptions of DC supply voltage . 75
Table 19 – Surge and ring wave immunity test levels for the meter's mains ports,
current transformer ports and current transducer ports . 82
Table 20 – Evaluation of primary meter functions under influence of voltage signal
variation for directly connected, and transformer or transducer-operated meters . 89
Table 21 – Short-time overcurrent test . 92
Table A.1 – Operating conditions of the optical test output . 97
Table B.1 – Operating conditions of the electrical pulse outputs . 98
Table B.2 – Test of pulse output . 99
Table B.3 – Test of pulse input device . 100
Table B.4 – Operating conditions of electronic pulse outputs . 101
Table C.1 – Operating conditions of pulse output for special applications and long
distances . 102
Table C.2 – Test of pulse output device . 103
Table C.3 – Test of pulse input device . 104
Table D.1 – Examples of voltage marking according to network voltage . 105
Table D.2 – Symbols for measuring elements . 106
Table D.3 – Marking of the measured quantity (examples) . 109
Table D.4 – Inscriptions of the accuracy class and the meter constant (examples) . 110
Table D.5 – Symbols for transformer-operated meters and transducer-operated meters
(examples) . 110
Table D.6 – Tariff function symbols (examples) . 111
Table D.7 – Symbols for tariff function (examples) . 112
Table D.8 – Symbols for auxiliary devices (examples) . 112
Table D.9 – Symbols for communication ports (examples) . 113
Table M.1 – Cross-channel influence test conditions for Multi-Branch Circuit Energy
Meters . 135

IEC CDV 62052-11 © IEC 2026
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,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC
Publication(s)"). Their preparation is entrusted to technical committees; any IEC National
Committee interested in the subject dealt with may participate in this preparatory work.
International, governmental and non-governmental organizations liaising with the IEC also
participate in this preparation. IEC collaborates closely with the International Organization for
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 interested IEC National Committees.
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) 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/had not] received notice of (a) patent(s), which may be required to implement this
IEC CDV 62052-11 © IEC 2026
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.
IEC shall not be held responsible for identifying any or all such patent rights.
IEC 62052-11:2025 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) Definitions of instrument transformers, current sensors, transducers, and transducer-
operated meters have been added,
d) Definition of accuracy class has been revised; definition of accuracy class index has been
removed,
e
...