IEC 62058-21-2008 Electricity metering equipment (AC) - Acceptance inspection - Part 21 Particular requirements for electromechanical meters for active energy (.pdf

1、 IEC 62058-21Edition 1.0 2008-09INTERNATIONAL STANDARD NORME INTERNATIONALEElectricity metering equipment (AC) Acceptance inspection Part 21: Particular requirements for electromechanical meters for active energy (classes 0,5, 1 and 2) Equipement de comptage de llectricit (c.a.) Contrle de rception

2、Partie 21: Exigences particulires pour compteurs lectromcaniques dnergie active (classes 0,5, 1 et 2) IEC62058-21:2008 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2008 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or uti

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17、uipment (AC) Acceptance inspection Part 21: Particular requirements for electromechanical meters for active energy (classes 0,5, 1 and 2) Equipement de comptage de llectricit (c.a.) Contrle de rception Partie 21: Exigences particulires pour compteurs lectromcaniques dnergie active (classes 0,5, 1 et

18、 2) INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE NICS 17.220; 91.140.50 PRICE CODECODE PRIXISBN 2-8318-9991-5 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale 2 62058-21 IEC:200

19、8 CONTENTS FOREWORD.3 INTRODUCTION.5 1 Scope.6 2 Normative references .6 3 Terms, definitions, symbols and abbreviations6 4 Test conditions .6 4.1 Place of inspection 6 4.2 Reference conditions.6 4.3 Uncertainty of measurement of percentage error .8 4.4 Cover and seal 9 5 Inspection procedure 9 5.1

20、Tests to be performed and inspection methods9 5.2 Preliminary tests and pre-conditioning.10 5.3 Test No. 1: AC voltage test10 5.4 Test No. 2: Test of no-load condition .11 5.5 Test No. 3: Starting .11 5.6 Tests No. 4 to 9: Accuracy tests 11 5.7 Test No. 10: Verification of the register .12 5.8 Other

21、 tests 12 6 Criteria for lot acceptance non-acceptance, disposal of unacceptable lots 12 7 Test record and evaluation .13 Bibliography15 Table 1 Voltage and current unbalance for polyphase meters 6 Table 2 Reference conditions.7 Table 3 Percentage error limits corrected with uncertainty .9 Table 4 A

22、cceptance tests and inspection methods .10 Table 5 AC voltage test11 Table 6 Value of current for starting test 11 Table 7 Accuracy test points and limits of percentage error 12 Table 8 Inspection sheet14 62058-21 IEC:2008 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ELECTRICITY METERING EQUIPMENT

23、(AC) ACCEPTANCE INSPECTION Part 21: Particular requirements for electromechanical meters for active energy (classes 0,5, 1 and 2) FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC N

24、ational 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, Pu

25、blicly 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-gove

26、rnmental 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

27、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 accept

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29、l 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 latt

30、er. 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its di

31、rectors, 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 aris

32、ing 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) Attention is

33、drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 62058-21 has been prepared by IEC technical committee 13: Electrical energy meas

34、urement, tariff- and load control. The text of this standard is based on the following documents: FDIS Report on voting 13/1431/FDIS 13/1439/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. A list of all parts of

35、IEC 62058 series, published under the general title Electricity metering equipment (AC) Acceptance inspection, can be found on the IEC website. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. 4 62058-21 IEC:2008 The committee has decided that the contents of this

36、 publication will remain unchanged until the maintenance result 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. 62058-21 IEC:2008

37、 5 INTRODUCTION This standard together with IEC 62058-11 cancels and replaces IEC 60514, Acceptance inspection of class 2 alternating-current watt-hour meters, which was a Technical Report. 6 62058-21 IEC:2008 ELECTRICITY METERING EQUIPMENT (AC) ACCEPTANCE INSPECTION Part 21: Particular requirements

38、 for electromechanical meters for active energy (classes 0,5, 1 and 2) 1 Scope This part of IEC 62058 specifies particular requirements for acceptance inspection of newly manufactured direct connected or transformer operated electromechanical meters for active energy (classes 0,5, 1 and 2) delivered

39、 in lots in quantities above 50. The method of acceptance of smaller lots should be agreed upon by the manufacturer and the customer. The process described herein is primarily intended for acceptance inspection between the manufacturer and the purchaser. NOTE It can also be used for other purposes,

40、for example to support initial verification. 2 Normative references 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 am

41、endments) applies. IEC 62058-11:2008, Electricity metering equipment (a.c.) Acceptance inspection Part 11: General acceptance inspection methods ISO/IEC GUIDE 98: 1995, Guide to the Expression of Uncertainty in Measurement 3 Terms, definitions, symbols and abbreviations For the purposes of this docu

42、ment, the terms, definitions, symbols and abbreviations of IEC 62058-11 apply. 4 Test conditions 4.1 Place of inspection Subclause 5.15 of IEC 62058-11 applies. 4.2 Reference conditions The tests shall be carried out under the following conditions: Table 1 Voltage and current unbalance for polyphase

43、 meters Class of meter Condition 0,5 1 2 Each of the voltages between phase and neutral and between any two phases shall not differ from the average corresponding voltage by more than 0,5 % 1 % 1 % 62058-21 IEC:2008 7 Class of meter Condition 0,5 1 2 Each of the currents in the conductors shall not

44、differ from the average current by more than 1 % 2 % 2 % The phase displacements of each of these currents from the corresponding phase-to-neutral voltage, irrespective of the phase angle, shall not differ from each other by more than 2 Table 2 Reference conditions Permissible tolerances for meters

45、of class Influence quantity Reference value 0,5 1 2 Ambient temperature Reference temperature or, in its absence, 23 C a 1 C 2 C 2 C Voltage Reference voltage 0,5 % 1,0 % 1,0 % Frequency Reference frequency 0,2 % 0,3 % 0,5 % Phase sequence L1 L2 L3 - Voltage unbalance All phases connected - Distorti

46、on factor less than Wave-form Sinusoidal voltages and currents 2 % 2 % 3 % Continuous magnetic induction of external origin Equal to zero - Induction value which causes a variation of error not greater than b 0,1 % 0,2 % 0,3 % Magnetic induction of external origin at the reference frequency Magnetic

47、 induction equal to zero but should in any case be smaller than 0,05 mT bOperation of accessories No operation of accessories - Working position Vertical working position c 0,5 Conducted disturbances, induced by radio frequency fields, 150 kHz to 80 MHz Equal to zero 1 V aIf the tests are made at a

48、temperature other than the reference temperature, including permissible tolerances, the results shall be corrected by applying the appropriate temperature coefficient of the meter. bThe test consists of 1) for a single-phase meter, determining the errors first with the meter normally connected to th

49、e mains and then after inverting the connections to the current circuits as well as to the voltage circuits. Half of the difference between the two errors is the value of the variation of error. Because of the unknown phase of the external field, the test should be made at 0,1 Ibresp. 0,05 In at unity power factor and 0,2 Ibresp. 0,