1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationElectricity metering equipment DependabilityPart 32-1: Durability Testing of the stability of metrological characteristics by applying elevated temperatureBS EN 62059-32-1:2012Na
2、tional forewordThis British Standard is the UK implementation of EN 62059-32-1:2012. It isidentical to IEC 62059-32-1:2011.The UK participation in its preparation was entrusted to Technical CommitteePEL/13, Electricity Meters.A list of organizations represented on this committee can be obtained onre
3、quest to its secretary.This publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application. The British Standards Institution 2012Published by BSI Standards Limited 2012ISBN 978 0 580 66962 0ICS 17.220; 19.020; 91.140.50Compliance
4、 with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of the StandardsPolicy and Strategy Committee on 30 April 2012.Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 62059-32-1:2012EUROPEAN STA
5、NDARD EN 62059-32-1 NORME EUROPENNE EUROPISCHE NORM March 2012 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2012 CENELEC - All ri
6、ghts of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 62059-32-1:2012 E ICS 17.220; 19.020; 91.140.50 English version Electricity metering equipment - Dependability - Part 32-1: Durability - Testing of the stability of metrological characteristics by a
7、pplying elevated temperature (IEC 62059-32-1:2011) Appareils de comptage dlectricit - Sret de fonctionnement - Partie 32-1: Durabilit - Contrle de stabilit des caractristiques mtrologiques en appliquant une temprature leve (CEI 62059-32-1:2011) Elektrizittszhler -Zuverlssigkeit - Teil 32-1: Haltbark
8、eit - Prfung der Stabilitt der metrologischen Eigenschaften unter Anwendung erhhter Temperatur (IEC 62059-32-1:2011) This European Standard was approved by CENELEC on 2012-01-11. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving t
9、his European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC member. This European Standard exists in three offi
10、cial versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotech
11、nical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Swit
12、zerland, Turkey and the United Kingdom. BS EN 62059-32-1:2012EN 62059-32-1:2012 - 2 - Foreword The text of document 13/1483/FDIS, future edition 1 of IEC 62059-32-1, prepared by IEC/TC 13, “Electrical energy measurement, tariff- and load control“, was submitted to the IEC-CENELEC parallel vote and a
13、pproved by CENELEC as EN 62059-32-1:2012. The following dates are fixed: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2012-10-11 latest date by which the national standards conflicting with the docu
14、ment have to be withdrawn (dow) 2015-01-11 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. This document has been prepared under a man
15、date given to CENELEC by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For the relationship with EU Directive(s) see informative Annex ZZ, which is an integral part of this document. Endorsement notice The text of the Interna
16、tional Standard IEC 62059-32-1:2011 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 62053-11:2003 NOTE Harmonized as EN 62053-11:2003 (not modified). IEC 62053-22
17、:2003 IEC 62053-23:2003 IEC 62055-31:2005 NOTE Harmonized as EN 62053-22:2003 (not modified). NOTE Harmonized as EN 62053-23:2003 (not modified). NOTE Harmonized as EN 62055-31:2005 (not modified). BS EN 62059-32-1:2012- 3 - EN 62059-32-1:2012 Annex ZA (normative) Normative references to internation
18、al publications with their corresponding European publications The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the
19、referenced document (including any amendments) applies. NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60068-2-2 2007 Environmental testing - Part 2-2: Tests - Test B: Dry heat EN
20、 60068-2-2 2007 IEC 62052-11 2003 Electricity metering equipment (AC) - General requirements, tests and test conditions - Part 11: Metering equipment EN 62052-11 2003 IEC 62053-21 2003 Electricity metering equipment (a.c.) - Particular requirements - Part 21: Static meters for active energy (classes
21、 1 and 2) EN 62053-21 2003 BS EN 62059-32-1:2012EN 62059-32-1:2012 - 4 - Annex ZZ (informative) Coverage of Essential Requirements of EU Directives This European Standard has been prepared under the mandate M/374 given to CENELEC by the European Commission and within its scope, this part 32-1 of EN
22、62059 specifies a method for testing the stability of metrological characteristics of electricity meters, suitable for verification of conformity with the durability requirements. The standard covers the Essential Requirement 5, Durability, Annex I of the Directive 2004/22/EC of the European Parliam
23、ent and of the council of 31 March 2004 on measuring instruments (MID): “A measuring instrument shall be designed to maintain an adequate stability of its metrological characteristics over a period of time estimated by the manufacturer, provided that it is properly installed, maintained and used acc
24、ording to the manufacturers instruction when in the environmental conditions for which it is intended.” Compliance with this standard provides one means of conformity with the specified essential requirements of the Directives concerned. WARNING - Other requirements and other EU Directives may be ap
25、plicable to the products falling within the scope of this standard. BS EN 62059-32-1:2012 2 62059-32-1 IEC:2011 CONTENTS 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 verificatio
26、n 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
27、 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 Imax13 BS EN 62059-32-1:201262059-32-1 IEC:2011 5 INTRODUCTION Electricity meters are produc
28、ts 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
29、 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
30、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 oper
31、ating 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. BS EN 62059-32-1:2012 6 62059-32-1 IEC:2011 ELECTRICITY METERING EQUIPMENT DEPENDABILITY Part 32-1: Durability Testin
32、g 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,
33、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 measurement is out of the scope of this standard. Note, that from the results of this test, no conclus
34、ion can be drawn for the length of period during which the stability of the metrological characteristics will be maintained when the meter is operated under usual conditions. This International Standard is applicable to all types of electricity meters in the scope of IEC TC 13. 2 Normative reference
35、s The following referenced documents are indispensable for the application 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 60068-2-2:2007, Environmental testing Part
36、2-2: Tests Test B: Dry heat IEC 62052-11:2003, Electricity metering equipment (AC) General requirements, tests and test conditions Part 11: Metering equipment IEC 62053-21:2003, Electricity metering equipment (a.c.) Particular requirements Part 21: Static meters for active energy (classes 1 and 2) 3
37、 Terms and definitions For the purposes of this document, the terms and definitions in IEC 62052-11 as well as the following apply. 3.1 durability the ability of an item to perform a required function under given conditions of use and maintenance, until a limiting state is reached NOTE A limiting st
38、ate of an item may be characterized by the end of the useful life, unsuitability or any economic or technological reasons or other relevant factors. BS EN 62059-32-1:201262059-32-1 IEC:2011 7 IEC 60050-191: 1990, 191-02-02 4 General The test procedure consists of: initial measurements, see Clause 5;
39、 operational conditioning at the maximum temperature, voltage and current of the specified operating range, see Clause 6. During the conditioning, intermediate measurements are taken, see Clause 7; recovery see Clause 8 and final measurements, see Clause 9. The test shall be performed on (one of) th
40、e meter(s) submitted for type testing (meter under test, MUT). During the conditioning, the MUT shall not exhibit any irregular behaviour concerning energy measurement and registration. This shall be verified as specified in Clause 7. In addition, after conditioning and recovery, the change of the p
41、ercentage error, when compared to the initial measurements, shall not exceed the limits specified in Clause 9. To verify this, the percentage error shall be measured, as specified in Clause 5, before conditioning and following the recovery period. If the MUT passes the test, this gives a reasonable
42、level of confidence that the meter type tested is free from serious design errors and material flaws that may prevent it from maintaining its specified accuracy for the period of use estimated by the manufacturer. NOTE For this estimation, the acceleration factor determined according to IEC 62059-31
43、 can be used. 5 Initial measurements The percentage error of the MUT shall be measured using the test output of the MUT and appropriate test equipment at the following test points: value of voltage: Un; value of current for direct connected meters: 0,1 Ib, Iband Imax; value of current for transforme
44、r operated meters: 0,05 In, Inand Imax; value of power factor for meters for active energy: cos = 1 and cos = 0,5 inductive; value of power factor for meters for reactive energy: sin = 1 and sin = 0,5 inductive. The accuracy test conditions shall be as specified in the relevant type test standard. 6
45、 Conditioning The MUT shall be exposed to the elevated temperature according to IEC 60068-2-2 as follows: test Be: dry heat for heat-dissipating specimens with gradual change of temperature that are required to be powered throughout the test; air velocity: low preferred (see IEC 60068-2-2, 4.2); tem
46、perature: the upper limit of the operating temperature range specified by the manufacturer; duration of the test: 1 000 h; BS EN 62059-32-1:2012 8 62059-32-1 IEC:2011 MUT in operating conditions, with test load: value of voltage: 1,1 Un. If the meter is intended for several reference voltages, then
47、the highest reference voltage shall be taken into account; value of current: Imax; value of power factor: for meters for active energy cos = 1; for meters for reactive energy sin = 1; if the meter measures both active and reactive energy, then the value of the power factor shall be cos = 0,866 (sin
48、= 0,5) inductive. The tolerance of the voltage, current, power factor and the load that should be maintained depends on the method chosen to verify energy measurement and registration; see 7.2 and 7.3. The MUT shall be mounted as for normal operation, with all covers and terminal covers in place. Th
49、e ability of the MUT to transfer heat by thermal radiation shall be minimised. For details, see IEC 60068-2-2, 6.3. The MUT shall be connected as specified by the manufacturer, using the cable type specified by the manufacturer. The length of the cables within the test chamber shall be 1 m each. The cross-section shall be selected so that the current density is between 3,2 A/mm2and 4 A/mm2. If this would result in a
