EN 60216-3-2006 en Electrical insulating materials - Thermal endurance properties Part 3 Instructions for calculating thermal endurance characteristics《电气绝缘材料 耐热性能 第3部分 耐热性计算说明》.pdf

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1、BRITISH STANDARDBS EN60216-3:2006Electrical insulating materials Thermal endurance properties Part 3: Instructions for calculating thermal endurance characteristicsThe European Standard EN 60216-3:2006 has the status of a British StandardICS 17.220.99; 19.020; 29.035.01g49g50g3g38g50g51g60g44g49g42g

2、3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 60216-3:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 Aug

3、ust 2006 BSI 2006ISBN 0 580 49090 4National forewordThis British Standard is the official English language version of EN 60216-3:2006. It is identical with IEC 60216-3:2006. It supersedes BS EN 60216-3:2002 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committ

4、ee GEL/112, Evaluation and qualification of electrical insulating materials and systems, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European

5、publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the

6、 necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the

7、 interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK.Summary of pagesThis document comprises a front cover, an inside front cover, the EN title page, pages 2 to 50, an inside back cover and a b

8、ack cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARD EN 60216-3 NORME EUROPENNE EUROPISCHE NORM July 2006 CENELEC European Committee for Electrotechnical Standardization Co

9、mit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60216-3:2006 E ICS 17.2

10、20.99; 19.020; 29.035.01 Supersedes EN 60216-3:2002English version Electrical insulating materials - Thermal endurance properties Part 3: Instructions for calculating thermal endurance characteristics (IEC 60216-3:2006) Matriaux isolants lectriques - Proprits dendurance thermique Partie 3: Instructi

11、ons pour le calcul des caractristiques dendurance thermique (CEI 60216-3:2006) Elektroisolierstoffe Eigenschaften hinsichtlich des thermischen Langzeitverhaltens Teil 3: Anweisungen zur Berechnung thermischer Langzeitkennwerte (IEC 60216-3:2006) This European Standard was approved by CENELEC on 2006

12、-06-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving 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 o

13、btained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official 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 C

14、entral Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, t

15、he Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Foreword The text of document 112/26/FDIS, future edition 2 of IEC 60216-3, prepared by IEC TC 112, Evaluation and qualification of electrical insulating materials and systems, w

16、as submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60216-3 on 2006-06-01. This European Standard supersedes EN 60216-3:2002. The major technical changes with regard to EN 60216-3:2002 concern an updating of Table C.2. In addition, the scope has been extended to cover a g

17、reater range of data characteristics, particularly with regard to incomplete data, as often obtained from proof test criteria. The greater flexibility of use should lead to more efficient employment of the time available for ageing purposes. Finally, the procedures specified in this part of EN 60216

18、 have been extensively tested and have been used to calculate results from a large body of experimental data obtained in accordance with other parts of the standard. Annex E Computer program has been completely reworked. The following dates were fixed: latest date by which the EN has to be implement

19、ed at national level by publication of an identical national standard or by endorsement (dop) 2007-03-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2009-06-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International St

20、andard IEC 60216-3:2006 was approved by CENELEC as a European Standard without any modification. _ EN 60216-3:2006 2 3 EN 60216-3:2006 CONTENTS 1 Scope 5 2 Normative references .5 3 Terms, definitions, symbols and abbreviated terms5 4 Principles of calculations 9 4.1 General principles .9 4.2 Prelim

21、inary calculations .9 4.3 Variance calculations.10 4.4 Statistical tests11 4.5 Results11 5 Requirements and recommendations for valid calculations 12 5.1 Requirements for experimental data.12 5.2 Precision of calculations 12 6 Calculation procedures .12 6.1 Preliminary calculations .12 6.2 Main calc

22、ulations.16 6.3 Statistical tests18 6.4 Thermal endurance graph 20 7 Calculation and requirements for results .20 7.1 Calculation of thermal endurance characteristics20 7.2 Summary of statistical tests and reporting 21 7.3 Reporting of results .21 8 Test report .21 Annex A (normative) Decision flow

23、chart .23 Annex B (normative) Decision table.24 Annex C (informative) Statistical tables .25 Annex D (informative) Worked examples .34 Annex E (informative) Computer program41 Annex ZA (normative) Normative references to international publications with their corresponding European publications50 Bib

24、liography .49 Figure D.1 Thermal endurance graph .38 Figure D.2 Example 3: Property-time graph (destructive test data) 40 Table B.1 Decisions and actions according to tests.24 Table C.1 Coefficients for censored data calculations .25 Table C.2 Fractiles of the F-distribution, F(0,95 ,fn,fd) .31 Tabl

25、e C.3 Fractiles of the F-distribution, F(0,995 ,fn,fd) 32 Table C.4 Fractiles of the t-distribution, t0,9533 Table C.5 Fractiles of the 2-distribution 33 EN 60216-3:2006 4 Table D.1 Worked example 1 Censored data (proof tests)34 Table D.2 Worked example 2 Complete data (non-destructive tests) 36 Tab

26、le D.3 Worked example 3 Destructive tests 39 Table E.1 Non-destructive test data42 Table E.2 Destructive test data 43 5 EN 60216-3:2006 ELECTRICAL INSULATING MATERIALS THERMAL ENDURANCE PROPERTIES Part 3: Instructions for calculating thermal endurance characteristics 1 Scope This part of IEC 60216 s

27、pecifies the calculation procedures to be used for deriving thermal endurance characteristics from experimental data obtained in accordance with the instructions of IEC 60216-1 and IEC 60216-2, using fixed ageing temperatures and variable ageing times. The experimental data may be obtained using non

28、-destructive, destructive or proof tests. Data obtained from non-destructive or proof tests may be incomplete, in that measurement of times taken to reach the endpoint may have been terminated at some point after the median time but before all specimens have reached end-point. The procedures are ill

29、ustrated by worked examples, and suitable computer programs are recommended to facilitate the calculations. 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,

30、the latest edition of the referenced document (including any amendments) applies. IEC 60216-1:2001, Electrical insulating materials Properties of thermal endurance Part 1: Ageing procedures and evaluation of test results IEC 60216-2:2005, Electrical insulating materials Properties of thermal enduran

31、ce Part 2: Determination of thermal endurance properties of electrical insulating materials Choice of test criteria IEC 60493-1:1974, Guide for the statistical analysis of ageing test data Part 1: Methods based on mean values of normally distributed test results 3 Terms, definitions, symbols and abb

32、reviated terms 3.1 Terms and definitions For the purposes of this document, the following definitions apply. 3.1.1 ordered data group of data arranged in sequence so that in the appropriate direction through the sequence each member is greater than, or equal to, its predecessor NOTE 1 In this standa

33、rd, ascending order implies that the data is ordered in this way, the first being the smallest. NOTE 2 It has been established that the term “group” is used in the theoretical statistics literature to represent a subset of the whole data set. The group comprises those data having the same value of o

34、ne of the parameters of the set (e.g. ageing temperature). A group may itself comprise a number of sub-groups characterised by another parameter (e.g. time in the case of destructive tests). EN 60216-3:2006 6 3.1.2 order-statistic each individual value in a group of ordered data is referred to as an

35、 order-statistic identified by its numerical position in the sequence 3.1.3 incomplete data ordered data, where the values above and/or below defined points are not known 3.1.4 censored data incomplete data, where the number of unknown values is known. NOTE 1 If the censoring is begun above/below a

36、specified numerical value, the censoring is Type I. If above/below a specified order-statistic it is Type II This standard is concerned only with Type II. 3.1.5 degrees of freedom number of data values minus the number of parameter values 3.1.6 variance of a data group sum of the squares of the devi

37、ations of the data from a reference level. NOTE 1 The reference level may be defined by one or more parameters, for example a mean value (one parameter) or a line (two parameters, slope and intercept), divided by the number of degrees of freedom 3.1.7 central second moment of a data group sum of the

38、 squares of the differences between the data values and the value of the group mean, divided by the number of data in the group 3.1.8 covariance of data groups for two groups of data with equal numbers of elements where each element in one group corresponds to one in the other, the sum of the produc

39、ts of the deviations of the corresponding members from their group means, divided by the number of degrees of freedom 3.1.9 regression analysis process of deducing the best-fit line expressing the relation of corresponding members of two data groups by minimizing the sum of squares of deviations of

40、members of one of the groups from the line NOTE The parameters are referred to as the regression coefficients. 3.1.10 correlation coefficient number expressing the completeness of the relation between members of two data groups, equal to the covariance divided by the square root of the product of th

41、e variances of the groups NOTE The value of its square is between 0 (no correlation) and 1 (complete correlation). 3.1.11 end-point line line parallel to the time axis intercepting the property axis at the end-point value 7 EN 60216-3:2006 3.2 Symbols and abbreviated terms Subclause a Regression coe

42、fficient (y-intercept) 4.3, 6.2 apRegression coefficient for destructive test calculations 6.1 b Regression coefficient (slope) 4.3, 6.2 bpRegression coefficient for destructive test calculations 6.1 brIntermediate constant (calculation of cX) 6.3 c Intermediate constant (calculation of 2) 6.3 f Num

43、ber of degrees of freedom Tables C.2 to C5 F Fisher distributed stochastic variable 4.2, 6.1, 6.3 F0Tabulated value of F (linearity of thermal endurance graph) 4.4, 6.3 F1Tabulated value of F (linearity of property graph significance 0,05) 6.1 F2Tabulated value of F (linearity of property graph sign

44、ificance 0,005) 6.1 g Order number of ageing time for destructive tests 6.1 h Order number of property value for destructive tests 6.1 HIC Halving interval at temperature equal to TI 4.3, 7 HICgHalving interval corresponding to TIg7.3 i Order number of exposure temperature 4.1, 6.2 j Order number of

45、 time to end-point 4.1, 6.2 k Number of ageing temperatures 4.1, 6.2 miNumber of specimens aged at temperature i4.1, 6.1 N Total number of times to end-point 6.2 ngNumber of property values in group aged for time g6.1 niNumber of values of y at temperature i4.1, 6.1 p Mean value of property values i

46、n selected groups 6.1 p Value of diagnostic property 6.1 P Significance level of 2distribution 4.4, 6.3.1 peValue of diagnostic property at end-point for destructive tests 6.1 gp Mean of property values in group aged for time g6.1 pghIndividual property value 6.1 q Base of logarithms 6.3 r Number of

47、 ageing times selected for inclusion in calculation (destructive tests) 6.1 r2Square of correlation coefficient 6.2.3 s2Weighted mean of 21s and 22s 6.3 21s Weighted mean of 21is , pooled variance within selected groups 4.3, 6.1 - 6.3 ( )as21Adjusted value of 21s 4.4, 6.3 21gs Variance of property v

48、alues in group aged for time g6.1 21is Variance of yijvalues at temperature i4.3, 6.2 22s Variance about regression line 6.1 - 6.3 2as Adjusted value of s26.3 EN 60216-3:2006 8 2rs Intermediate constant 6.3 2YsVariance of Y 6.3 t Student distributed stochastic variable 6.3 tcAdjusted value of t (inc

49、omplete data) 6.3 TC Lower 95 % confidence limit of TI 4.4, 7 TCaAdjusted value of TC 7.1 TI Temperature Index 4.3, 7 TI10Temperature Index at 10 kh 7.1 TIaAdjusted value of TI 7.3 TIgTemperature index obtained by graphical means or without defined confidence limits 7.3 x Independent variable: reciprocal of thermodynamic temperature x Weighted mean value of x 6.2 X Specified value of x for estimation of y 6.3 XEstimated value of x at specified value of