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1、BRITISH STANDARD BS EN 61358:1996 IEC 1358:1996 Acceptance inspection for direct connected alternating current static watt-hour meters for active energy (classes 1 and 2) The European Standard EN 61358:1996 has the status of a British Standard ICS 17.220.20 Licensed Copy: sheffieldun sheffieldun, na
2、, Thu Nov 09 03:50:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 61358:1996 This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 December 1996 BSI 11-1998 The f
3、ollowing BSI references relate to the work on this standard: Committee reference PEL/13 Draft for comment 96/207919 DC ISBN 0 580 26322 3 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee PEL/13, Electricity meters, upon wh
4、ich the following bodies were represented: Building Automation and Mains Signalling Association (BAMSA) BEAMA Metering Association (BMA) Department of Trade and Industry Electricity Association Electricity Pool of England and Wales Energy Systems Trade Association Flag Association Institution of Ele
5、ctrical Engineers Office of Electricity Regulations (OFFER) United Kingdom Automatic Meter Reading Association Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 03:50:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 61358:1996 BSI 11-1
6、998i Contents Page Committees responsibleInside front cover National forewordii Foreword2 Text on EN 61358:19963 List of referencesInside back cover Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 03:50:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 61358:1996 ii BSI 11-1998 National for
7、eword This British Standard has been prepared by Technical Committee PEL/13 and is the English Language version of EN 61358:1996 Acceptance inspection for direct connected alternating current static watt-hour meters for active energy (classes 1 and 2) published by the European Committee for Electrot
8、echnical Standardization (CENELEC). It is identical with IEC 1368:1996 published by International Electrotechnical Commission (IEC). A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Co
9、mpliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references Publication referred toCorresponding British Standard EN 60514:1995 (IEC 514:1975) BS EN 60514 Acceptance inspection of class 2 alternating-current watt-hour meters EN 61036:1992 (IEC:1990) B
10、S EN 61036:1993 Alternating current static watt-hour meters for active energy (classes 1 and 2) BS ISO 3534: Statistics. Vocabulary and symbols ISO 3534-1:1993BS ISO 3534-1:1993 Probability and general statistical terms ISO 3534-2:1993BS ISO 3534-2:1993 Statistical quality control Summary of pages T
11、his document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 26, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the ins
12、ide front cover. Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 03:50:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61358 June 1996 ICS 17.220.20 Descriptors: Acceptance inspection, static meter, active energy, direct connected, alternatin
13、g current English version Acceptance inspection for direct connected alternating current static watt-hour meters for active energy (classes 1 and 2) (IEC 1358:1996) Contrle de rception des compteurs statiques dnergie active pour courant alternatif et branchement direct (classes 1 et 2) (CEI 1358:199
14、6) Annahmeprfung von elektronischen Wechselstrom-Wirkverbrauchzhlern fr direkten Anschlu (Klassen 1 und 2) (IEC 1358:1996) This European Standard was approved by CENELEC on 1996-03-05. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for gi
15、ving this 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 Central Secretariat or to any CENELEC member. This European Standard exists in three official
16、 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 Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committe
17、es of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europi
18、sches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1996 Copyright reserved to CENELEC members Ref. No. EN 61358:1996 E Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 03:50:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 61358:1996 BSI 11-1998
19、 2 Foreword The text of document 13/1093/FDIS, future edition 1 of IEC 1358, prepared by IEC TC 13, Equipment for electrical energy measurement and load control, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61358 on 1996-03-05. The following dates were fixed: Anne
20、xes designated “normative” are part of the body of the standard. Annexes designated “informative” are given for information only. In this standard, annexes A and ZA are normative and annex B is informative. Annex ZA has been added by CENELEC. Contents Page Introduction3 1Scope3 2General remarks3 3No
21、rmative references4 4Definitions4 5Acceptance conditions for batches5 6Place of inspection5 7Test conditions5 8Inspection and test procedure6 9Requirements corresponding to different inspection procedures8 Annexe A (normative) Symbols23 Annexe B (informative) Bibliography24 Annexe ZA (normative) Nor
22、mative references to international publications with their corresponding European publications25 Page Figure 1 Diagram of the single sampling plan11 Figure 2 Diagram of the double sampling plan12 Figure 3 Acceptance trapezium (standard deviation method)13 Figure 4 Acceptance trapezium (average range
23、 method)14 Table 1 Reference conditions6 Table 2 Uncertainty of measurement6 Table 3 AC voltage tests7 Table 4 Starting current7 Table 5 Test points and limits of errors8 Table 6 Acceptance number c8 Table 7 Example of using random numbers9 Table 8 Sample plans10 Table 9 Double sampling plan12 Table
24、 10 Specified values for the standard deviation method13 Table 11 Specified values for the average range method14 Table 12a Operating characteristic curves N # 10015 Table 12b Operating characteristic curves 101 # N # 50016 Table 12c Operating characteristic curves 501 # N # 1 00017 Table 13a Accept
25、ance trapezium, T = 3,5 %18 Table 13b Acceptance trapezium, T = 3,0 %19 Table 13c Acceptance trapezium, T = 2,5 %20 Table 14 Inspection sheet21 Table 15 Random numbers22 latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorse
26、ment(dop) 1997-01-01 latest date by which the national standards conflicting with the EN have to be withdrawn(dow) 1997-01-01 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 03:50:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 61358:1996 BSI 11-19983 Introduction This International Standard
27、 describes, in some detail, methods for acceptance inspection, and testing of newly manufactured static watt-hour meters delivered in quantities of 50 and above. IEC 514 serves as a reference document and annex A of that standard should be consulted for explanatory notes concerning sampling procedur
28、es. In this standard, wider error limits than those for type tests specified in the relevant publications have been allowed because: acceptance testing conditions have wider tolerances than those for type tests; displacing of the zero axis is not applicable for acceptance testing; the effects of han
29、dling of meters are taken into account. 1 Scope The methods and procedures included in this International Standard apply to newly manufactured direct connected alternating current static watt-hour meters of classes 1 and 2, covered by IEC 1036, which are produced and delivered in quantities of 50 an
30、d above. They provide for 100 % inspection or sampling inspection for acceptance by the purchaser. 2 General remarks 2.1 Two methods of acceptance inspection are proposed, namely: 100 % inspection, and sampling inspection. 2.2 The 100 % inspection consists of testing all the meters of a batch. 2.3 T
31、he sampling inspection is based upon the principles of mathematical statistics and as a consequence certain specified risks are undertaken both by the manufacturer and the purchaser. However, sampling inspection generally is more economical than 100 % inspection. In this standard, sampling inspectio
32、n has been planned so that, in practice, the quality of the meter batches can be judged with nearly the same confidence as with 100 % inspection. 2.4 Two methods of sampling inspection are described: inspection by attributes; inspection by variables. These two methods have been chosen so that the ju
33、dgement of quality is virtually the same for both methods. 2.5 Inspection by attributes gives results indicating conformity or non-conformity. It shall be applied when the characteristics under inspection cannot be measured. It shall also be applied when a characteristic can be measured but the valu
34、es are not of normal distribution (Laplace-Gauss). It may be applied, when the distribution is approximately normal, in place of inspection by variables. The advantage of inspection by attributes is its simplicity of application. 2.6 Inspection by variables gives additional information but it is app
35、licable only when the values of a characteristic are measurable and when those values are approximately normally distributed. In these circumstances, inspection by variables is the recommended method. The advantage of inspection by variables is a smaller sample size than by attributes for the same r
36、isk of decision. However, it requires more calculation. The test results are represented by: NOTEThe average range is easier to calculate than the standard deviation. However, when suitable calculating means are available for making a decision and for preparing additional information, the use of the
37、 standard deviation enables the efficiency of the method to be increased for the same sample size. 2.7 Inspection by variables is based on normally distributed values. It is recommended to test whether the sample is normally distributed, using e.g.: The “w/s” test of David, Hartley and Pearson. For
38、details of the test procedures see 11) For this test only the figures w(xmax xmin) and s are needed. The Wilk-Shapiro test. For details of the test procedures see 2. The Pearson chi-square test. = sample mean as an estimation of the batch mean; s=standard deviation as an estimation of the dispersion
39、 of the characteristics x in the batch. = average range 1) Figures in square brackets refer to the bibliography given in annex B. x w Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 03:50:11 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 61358:1996 4 BSI 11-1998 3 Normative references The foll
40、owing normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this Internatio
41、nal Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 410:1973, Sampling plans and procedures for inspection by attributes.
42、IEC 514:1975, Acceptance inspection of Class 2 alternating-current watthour meters. IEC 1036:1990, Alternating current static watt-hour meters for active energy (classes 1 and 2). ISO 3534-1:1993, Statistics Vocabulary and symbols Part 1: Probability and general statistical terms. ISO 3534-2:1993, S
43、tatistics Vocabulary and symbols Part 2: Statistical quality control. 4 Definitions For the purpose of this International Standard, the following definitions apply. For definitions concerning meters, reference is made to IEC 1036. The majority of the definitions of sampling techniques are generally
44、in accordance with 3 and with ISO 3534-1 and ISO 3534-2. 4.1 batch definite quantity of meters of the same type, of the same voltage and current rating and the same register, delivered by one supplier, manufactured or produced under conditions which are presumed uniform 4.2 batch size number N of me
45、ters in a batch ISO 4.3 sample meters taken at random for inspection from a batch 4.4 sample size number n of meters in the sample ISO 4.5 100 % inspection inspection of every meter in a batch 4.6 sampling inspection inspection of a limited number of meters, taken at random from the batch, according
46、 to a prescribed sampling plan ISO, modified 4.7 sampling plan plan according to which one or more samples are taken to obtain information and possibly to reach a decision ISO, modified 4.8 characteristic (quality characteristic) property (e.g. dielectric strength, starting, accuracy at one test poi
47、nt) of a meter which contributes to the quality and which helps to differentiate between the meters of a given batch. The differentiation may be either quantitative (by variable) or qualitative (by attributes) if it is measurable, its value for a given meter i is indicated by xi. ISO, modified 4.9 d
48、efect failure of a meter to meet a standard with respect to a characteristic ISO modified 4.10 defective meter meter having one or more defects ISO, modified 4.11 operating characteristic curve curve showing, for a given sampling plan, the probability of acceptance of a batch as a function of its ac
49、tual quality for a given characteristic ISO, modified 4.12 inspection by attributes inspection whereby certain characteristics of the sample meters are evaluated, classified as conforming or not conforming to the requirements, the number of defective meters counted and used as the basis for judgement of the batch (EOQC) 4.13 acceptance number maximum permitted number of defects in a sample for inspection by attributes 4.14 inspection by variables inspecti