IEC_TS_60216-7-1-2015.pdf

IEC TS 60216-7-1 Edition 1.0 2015-03 TECHNICALSPECIFICATION Electrical insulation materials Thermal endurance properties Part 7-1:Accelerated determination of relative thermal endurance usinganalytical test methods(RTEA)Instructions for calculations based onactivation energy INTERNATIONALELECTROTECHNICALCOMMISSION ICS 19.020;29.020;29.035.01 ISBN 978-2-8322-2430-4 Registered trademark of the International Electrotechnical Commission 2 IEC TS 60216-7-1:2015 IEC 2015 CONTENTS FOREWORD.3 INTRODUCTION.5 1 Scope.6 2 Normative references.6 3 Terms,definitions and abbreviations.7 3.1 Terms and definitions.7 3.2 Abbreviations.9 4 General considerations.9 4.1 Thermal degradation kinetics.9 4.2 Thermal analysis.10 4.3 Thermal endurance.10 5 General basics.11 5.1 Reaction rate,r.11 5.2 Extent of reaction .12 5.3 Rate of conversion .12 5.4 Order of reaction,n.12 5.5 Rate law.13 6 Thermokinetic parameter estimation.13 7 Analytical test methods.16 7.1 General.16 7.2 Isothermal methods.16 7.3 Model-free methods.16 7.4 Model-fitting methods.17 7.5 Conventional reference point.17 8 Calculation procedures.17 8.1 Determination of the kinetic parameters.17 8.2 Determination of analytical temperature endurance index,RTEA,and halving interval,HICA.17 8.3 Determination of RTEA.17 General.17 8.3.1 Calculation.18 8.3.29 Test report.19 Bibliography.21 Figure 1 Thermal endurance graph for the determination of the relative temperature endurance(RTE).18 PD IEC/TS 60216-7-1:2015IEC TS 60216-7-1:2015 IEC 2015 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ELECTRICAL INSULATION MATERIALS THERMAL ENDURANCE PROPERTIES Part 7-1:Accelerated determination of relative thermal endurance using analytical test methods(RTEA)Instructions for calculations based on activation energy 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 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,Publicly 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-governmental 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 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 accepted by IEC National Committees in that sense.While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate,IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user.4)In order to promote international 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 latter.5)IEC itself does not provide any attestation of conformity.Independent certification bodies provide conformity assessment services and,in some areas,access to IEC marks of conformity.IEC is not responsible for any services carried out by independent certification bodies.6)All users should ensure that they have the latest edition of this publication.7)No liability shall attach to IEC or its directors,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 arising 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 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.The main task of IEC technical committees is to prepare International Standards.In exceptional circumstances,a technical