IEC 62059-32-1:2011

IEC 62059-32-1 ®
Edition 1.0 2011-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electricity metering equipment – Dependability –
Part 32-1: Durability – Testing of the stability of metrological characteristics by
applying elevated temperature
Appareils de comptage de l'électricité – Sûreté de fonctionnement –
Partie 32-1: Durabilité – Contrôle de stabilité des caractéristiques métrologiques
en appliquant une température élevée

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IEC 62059-32-1 ®
Edition 1.0 2011-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electricity metering equipment – Dependability –
Part 32-1: Durability – Testing of the stability of metrological characteristics by
applying elevated temperature
Appareils de comptage de l'électricité – Sûreté de fonctionnement –
Partie 32-1: Durabilité – Contrôle de stabilité des caractéristiques métrologiques
en appliquant une température élevée

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX N
ICS 17.220; 19.020; 91.140.50 ISBN 978-2-88912-827-3

– 2 – 62059-32-1  IEC:2011
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 General . 7
5 Initial measurements . 7
6 Conditioning . 7
7 Intermediate measurements – verification of energy measurement and registration . 9
7.1 General . 9
7.2 Method A: Test method using a reference meter. 9
7.2.1 Test conditions . 9
7.2.2 Test using a reference standard meter . 10
7.2.3 Test using a reference meter of the same type as the MUT . 10
7.3 Method B: Test method using a stable load . 11
7.4 Final temperature ramp . 12
8 Recovery . 12
9 Final measurements and acceptance criteria . 12
10 Information to be given in the test report . 13
Bibliography . 14

Table 1 – Limits of change in percentage error at I . 13
max
62059-32-1  IEC:2011 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICITY METERING EQUIPMENT –
DEPENDABILITY –
Part 32-1: Durability –
Testing of the stability of metrological characteristics
by applying elevated temperature

FOREWORD
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International Standard IEC 62059-32-1 has been prepared by IEC technical committee 13:
Electrical energy measurement, tariff- and load control.
The text of this standard is based on the following documents:
FDIS RVD
13/1483/FDIS 13/1493/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

– 4 – 62059-32-1  IEC:2011
A list of all parts of IEC 62059 series, under the general title Electricity metering equipment –
Dependability, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
62059-32-1  IEC:2011 – 5 –
INTRODUCTION
Electricity meters are products designed for high reliability and durability to operate
continuously for extended periods without supervision.
To manage metering assets effectively, it is important to have tools for predicting and
estimating life characteristics of various types.
IEC 62059-41 provides methods for predicting the failure rate – assumed to be constant – of
metering equipment, based on the parts stress method.
IEC 62059-31-1 provides a method for estimating life characteristics using accelerated
reliability testing by operating the test specimens at elevated temperature and humidity.
Future parts of IEC 62059-31 may be established to cover accelerated reliability testing,
applying other stresses.
This standard, IEC 62059-32-1 provides a test method to evaluate one important aspect of
durability, the stability of metrology characteristics, by operating a test specimen at the upper
limit of the specified operating range of temperature, voltage and current for an extended
period. Future parts of IEC 62059-32 may be established to cover other kinds of stress or
other aspects of durability.
– 6 – 62059-32-1  IEC:2011
ELECTRICITY METERING EQUIPMENT –
DEPENDABILITY –
Part 32-1: Durability –
Testing of the stability of metrological characteristics
by applying elevated temperature

1 Scope
The stability of metrological characteristics is one important aspect of durability.
This part of IEC 62059 specifies a method for testing the stability of metrological
characteristics of electricity meters, by operating a test specimen at the upper limit of the
specified operating range of temperature, voltage and current for an extended period.
Functional performance other than the accuracy of energy
...