IEC 60216-5-2008 Electrical insulating materials - Thermal endurance properties - Part 5 Determination of relative thermal endurance index (RTE) of an insulatin.pdf

1、 IEC 60216-5Edition 3.0 2008-03INTERNATIONAL STANDARD NORME INTERNATIONALEElectrical insulating materials Thermal endurance properties Part 5: Determination of relative thermal endurance index (RTE) of an insulating material Matriaux isolants lectriques Proprits dendurance thermique Partie 5: Dtermi

2、nation de lindice dendurance thermique relatif (RTE) dun matriau isolant IEC60216-5:2008 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 utilized in any form or by any me

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16、aires sur cette publication ou si vous avez des questions, visitez le FAQ du Service clients ou contactez-nous: Email: csciec.ch Tl.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC 60216-5Edition 3.0 2008-03INTERNATIONAL STANDARD NORME INTERNATIONALEElectrical insulating materials Thermal endurance prop

17、erties Part 5: Determination of relative thermal endurance index (RTE) of an insulating material Matriaux isolants lectriques Proprits dendurance thermique Partie 5: Dtermination de lindice dendurance thermique relatif (RTE) dun matriau isolant INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION EL

18、ECTROTECHNIQUE INTERNATIONALE TICS 19.020; 29.020; 29.035.01 PRICE CODECODE PRIXISBN 2-8318-9655-X 2 60216-5 IEC:2008 CONTENTS FOREWORD.03 1 Scope.1H1H5 2 Normative references .2H2H5 3 Terms, definitions, symbols, units and abbreviations 3H3H5 3.1 Terms, abbreviations, and definitions 4H4H6 3.2 Symb

19、ols and units .5H5H7 3.3 Objectives of RTE determination .6H6H8 4 Experimental procedures7H7H8 4.1 Selection of reference EIM 8H8H8 4.2 Selection of diagnostic test for extent of ageing.9H9H9 4.3 Ageing procedures 10H10H9 5 Calculation procedures. 11H11H10 5.1 Thermal endurance data Calculation of i

20、ntermediate parameters 12H12H10 5.2 Calculation of RTE 13H13H11 5.3 Statistical and numerical tests . 14H14H11 5.3.1 Tests of IEC 60216-3. 15H15H11 5.3.2 Precision of correlation time 16H16H12 5.3.3 Lower confidence interval of RTE 17H17H12 5.3.4 Extrapolation . 18H18H13 6 Report 19H19H13 6.1 Result

21、s of statistical and numerical tests . 20H20H13 6.2 Results 21H21H13 6.3 Report . 22H22H13 7 Material testing by short-term thermal ageing . 23H23H13 8 Insulation classification 24H24H14 Annex A (informative) Repeatability of correlation time 25H25H15 Annex B (informative) Thermal class assignment .

22、 26H26H18 Annex C (informative) Computer program 27H27H20 Annex D (informative) Selection of the reference EIM 28H28H21 Bibliography 29H29H23 Figure 1 Thermal endurance graphs.30H30H9 Figure 2 Unacceptable thermal endurance graphs . 31H31H10 Table 1 Input parameters for the calculations concerning R

23、TE. 32H32H11 Table B.1 Thermal class equivalents for insulating material . 33H33H18 Table B.2 F function; p = 0,05 34H34H19 Table B.3 tfunction. 35H35H19 60216-5 IEC:2008 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ELECTRICAL INSULATING MATERIALS THERMAL ENDURANCE PROPERTIES Part 5: Determination

24、of relative thermal endurance index (RTE) of an insulating material FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote internati

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33、 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 drawn to the possibility that some of the elements of this IEC

34、 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 60216-5 has been prepared by IEC technical committee 112: Evaluation and qualification of electrical insulating materials and systems. This th

35、ird edition cancels and replaces the second edition, published in 2003, and constitutes a technical revision. This third edition clarifies and corrects a few items and adds an Annex D which provides criteria for the selection of the reference (or reference EIM). The third edition provides instructio

36、ns for deriving a provisional estimate of the temperature up to which a material may give satisfactory performance in an application (by comparative thermal ageing with a material of known performance). This standard is to be read in conjunction with IEC 60216-1, IEC 60216-2 and IEC 60216-3. 4 60216

37、5 IEC:2008 The text of this standard is based on the following documents: FDIS Report on voting 112/89/FDIS 112/94/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

38、with the ISO/IEC Directives, Part 2. The list of all the parts of the IEC 60216 series, under the general title Electrical insulating materials Thermal endurance properties, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until t

39、he maintenance result date0 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. 60216-5 IEC:2008 5 ELECTRICAL INSULATING MATERIALS THERMAL

40、 ENDURANCE PROPERTIES Part 5: Determination of relative thermal endurance index (RTE) of an insulating material 1 Scope This part of IEC 60216 specifies the experimental and calculation procedures to be used for deriving the relative thermal endurance index of a material from experimental data obtai

41、ned in accordance with the instructions of IEC 60216-1 and IEC 60216-2. The calculation procedures are supplementary to those of IEC 60216-3. Guidance is also given for assessment of thermal ageing after a single fixed time and temperature, without extrapolation. The experimental data may in princip

42、le be obtained using destructive, non-destructive or proof tests, although destructive tests have been much more extensively employed. Data obtained from non-destructive or proof tests may be “censored”, in that measurement of times taken to reach the endpoint may have been terminated at some point

43、after the median time but before all specimens have reached end-point (see IEC 60216-1). Guidance is given for preliminary assignment of a thermal class for an insulating material, based upon the thermal ageing performance. The calculation procedures of this standard also apply to the determination

44、of the thermal class of an electrical insulation system when the thermal stress is the prevailing ageing factor. 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 referen

45、ces, 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, Electrical insulating materials Thermal endurance properties

46、Part 2: Determination of thermal endurance properties of electrical insulating materials Choice of test criteria IEC 60216-3:2006, Electrical insulating materials Thermal endurance properties Part 3: Instructions for calculating thermal endurance characteristics 3 Terms, definitions, symbols, units

47、and abbreviations For the purposes of this document, the following terms, definitions, symbols, units and abbreviated terms apply. 6 60216-5 IEC:2008 3.1 Terms, abbreviations, and definitions 3.1.1 electrical insulating material EIM solid or fluid with negligibly low electric conductivity, or a simp

48、le combination of such materials, used to separate conducting parts at different electrical potential in electrotechnical devices 3.1.2 assessed thermal endurance index ATE numerical value of the temperature in degrees Celsius, up to which the reference EIM possesses known, satisfactory service perf

49、ormance in the specified application NOTE 1 The value of the ATE may vary between applications for the same material. NOTE 2 Sometimes referred to as “absolute” thermal endurance index. 3.1.3 candidate EIM material for which an estimate of the thermal endurance is required to be determined NOTE The determination is made by simultaneous thermal ageing of the material and a reference