prEN IEC 62059-32-1:2025

SLOVENSKI STANDARD
01-september-2025
Oprema za merjenje električne energije - Zagotovljivost - 32-1. del: Trajnost -
Preskušanje stabilnosti meteoroloških karakteristik s povišano temperaturo
Electricity metering equipment - Dependability - Part 32-1: Durability - Testing of the
stability of metrological characteristics by applying elevated temperature
Elektrizitätszähler - Zuverlässigkeit - Teil 32-1: Haltbarkeit - Prüfung der Stabilität der
metrologischen Eigenschaften unter Anwendung erhöhter Temperatur
Appareils de comptage d'électricité - Sûreté de fonctionnement - Partie 32-1: Durabilité -
Contrôle de stabilité des caractéristiques métrologiques en appliquant une température
élevée
Ta slovenski standard je istoveten z: prEN IEC 62059-32-1:2025
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.

13/1956/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 62059-32-1 ED2
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-06-13 2025-09-05
SUPERSEDES DOCUMENTS:
13/1917A/RR
IEC TC 13 : ELECTRICAL ENERGY MEASUREMENT AND CONTROL
SECRETARIAT: SECRETARY:
Hungary Mr Bela Bodi
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):

ASPECTS CONCERNED:
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
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This document is still under study and subject to change. It should not be used for reference purposes.
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TITLE:
Electricity metering equipment - Dependability - Part 32-1: Durability - Testing of the stability
of metrological characteristics by applying elevated temperature

PROPOSED STABILITY DATE: 2030
NOTE FROM TC/SC OFFICERS:
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2 IEC CDV 62059-32-1 ED2 © IEC 2025
1 CONTENTS
2 CONTENTS . 2
3 FOREWORD . 3
4 INTRODUCTION . 5
5 1 Scope . 6
6 2 Normative references . 6
7 3 Terms and definitions . 7
8 4 General . 7
9 5 Initial measurements . 8
10 6 Conditioning . 8
11 7 Intermediate measurements – verification of energy measurement and registration . 9
12 7.1 General . 9
13 7.2 Test methods . 10
14 General . 10
15 Test using a Meter Test Unit (MTU) . 10
16 Test using a meter of the same type as the MUT as reference meter . 11
17 7.3 Final temperature ramp . 12
18 8 Recovery . 12
19 9 Final measurements and acceptance criteria . 12
20 10 Information to be given in the test report . 12
21 Bibliography . 14
Internal
IEC CDV 62059-32-1 ED2 © IEC 2025 3
24 INTERNATIONAL ELECTROTECHNICAL COMMISSION
25 ____________
27 ELECTRICITY METERING EQUIPMENT –
28 DEPENDABILITY –
30 Part 32-1: Durability –
31 Testing of the stability of metrological characteristics
32 by applying elevated temperature
35 FOREWORD
36 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
37 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
38 co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
39 in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
40 Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
41 preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
42 may participate in this preparatory work. International, governmental and non-governmental organizations liaising
43 with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
44 Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
45 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
46 consensus of opinion on the relevant subjects since each technical committee has representation from all
47 interested IEC National Committees.
48 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
49 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
50 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
51 misinterpretation by any end user.
52 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
53 transparently to the maximum extent possible in their national and regional publications. Any divergence between
54 any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
55 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
56 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
57 services carried out by independent certification bodies.
58 6) All users should ensure that they have the latest edition of this publication.
59 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
60 members of its technical committees and IEC National Committees for any personal injury, property damage or
61 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
62 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
63 Publications.
64 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
65 indispensable for the correct application of this publication.
66 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
67 rights. IEC shall not be held responsible for identifying any or all such patent rights.
68 IEC 62059-32-1 has been prepared by IEC technical committee 13: Electrical energy
69 measurement and control. It is an International Standard.
70 This second edition cancels and replaces the first edition published in 2011. This edition
71 constitutes a technical revision.
72 The text of this International Standard is based on the following documents:

Internal
4 IEC CDV 62059-32-1 ED2 © IEC 2025
Committee Draft Report on voting
13/XXXX/CDV 13/XXXX/RVD
74 Full information on the voting for its approval can be found in the report on voting indicated in
75 the above table.
76 The language used for the development of this International Standard is English.
77 This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
78 accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
79 at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
80 described in greater detail at www.iec.ch/publications.
81 A list of all parts of IEC 62059 series, under the general title Electricity metering equipment –
82 Dependability, can be found on the IEC website.
83 The committee has decided that the contents of this document will remain unchanged until the
84 stability date indicated on the IEC website under webstore.iec.ch in the data related to the
85 specific document. At this date, the document will be
86 • reconfirmed,
87 • withdrawn,
88 • replaced by a revised edition, or
89 • amended.
Internal
IEC CDV 62059-32-1 ED2 © IEC 2025 5
91 INTRODUCTION
92 Electricity meters are products designed for high reliability and durability to operate
93 continuously for extended periods without supervision.
94 To manage metering assets effectively, it is important to have tools for predicting and estimating
95 life characteristics of various types.
96 IEC 62059-41 provides methods for predicting the failure rate – assumed to be constant – of
97 metering equipment, based on the parts stress method.
98 IEC 62059-31-1 provides a method for estimating life characteristics using accelerated
99 reliability testing by operating the test specimens at elevated temperature and humidity. Future
100 parts of IEC 62059-31 may be established to cover accelerated reliability testing, applying other
101 stresses.
102 This standard, IEC 62059-32-1 provides a test method to evaluate one important aspect of
103 durability, the stability of metrological characteristics, by operating a test specimen at the upper
104 limit of the specified operating range of temperature, voltage and current for an extended period.
105 Future parts of IEC 62059-32 may be established to cover other kinds of stress or other aspects
106 of durability.
Internal
6 IEC CDV 62059-32-1 ED2 © IEC 2025
108 ELECTRICITY METERING EQUIPMENT –
109 DEPENDABILITY –
111 Part 32-1: Durability –
112 Testing of the stability of metrological characteristics
113 by applying elevated temperature
117 1 Scope
118 The stability of metrological characteristics is one important aspect of durability.
119 This part of IEC 62059 specifies a method for testing the stability of metrological characteristics
120 of AC and DC electricity meters, by operating a test specimen at the upper limit of the specified
121 operating range of temperature, voltage and current for an extended period.
122 This document does not apply to digital revenue meters.
123 Functional performance other than the accuracy of energy measurement is out of the scope of
124 this standard.
125 Note, that from the results of this test, no conclusion can be drawn for the length of period
126 during which the stability of the metrological characteristics will be maintained when the meter
127 is operated under field conditions. This test is intended as a qualitative accelerated life test
128 considering only the high temperature stress and must not be confused with the test of meter
129 error shift due to influence of temperature.
130 Meters designed for operation with Low-Power Instrument Transformers (LPITs as defined in
131 the IEC 61869 series) may be tested for compliance with this document and the relevant
132 IEC 62053 series documents only if such meters and their LPITs are tested together as directly
133 connected meters.
134 2 Normative references
135 The following referenced documents are indispensable for the application of this document. For
136 dated references, only the edition cited applies. For undated references, the latest edition of
137 the referenced document (including any amendments) applies.
138 IEC 60068-2-2:2007, Environmental testing – Part 2-2: Tests – Test B: Dry heat
139 IEC 62052‑11:20XX (Ed.3), Electricity metering equipment – General requirements, tests and test
140 conditions – Part 11: Metering equipment
141 IEC 62053‑21:20XX (Ed.3), Electricity metering equipment – Particular requirements – Part 21: Static
142 meters for AC active ener
...