IEC IEC TS 60216-7-1 Edition1.02015-03 TECHNICAL SPECIFICATION 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 INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS 19.020; 29.020; 29.035.01 ISBN 978-2-8322-2430-4 ?Regis PD IEC/TS 60216-7-1:2015 - 2 - IECTS60216-7-1:2015IEC2015 CONTENTS FOREWORD INTRODUCTION. 1 Scope. .6 2 Normative references. 3 Terms,definitionsandabbreviations 3.1 Terms and definitions 3.2 Abbreviations... 4 General considerations. 4.1 Thermal degradationkinetics 4.2 Thermal analysis... 4.3 Thermal endurance 5 General basics 5.1 Reaction rate, 5.2 Extent ofreaction$ .12 5.3 Rate of conversion 5.4 Order of reaction, n. 5.5 Ratelaw. 6 Thermokinetic parameter estimation. .13 7 Analytical test methods 7.1 General.. 16 7.2 Isothermal methods 16 7.3 Model-free methods ... 7.4 Model-fitting methods. 17 7.5 Conventional referencepoint. 8 Calculationprocedures. 8.1 Determination of the kinetic parameters... 8.2 Determination of analytical temperature endurance index, RTEA, and halving interval, HICA 17 8.3 Determination of RTEA 17 8.3.1 General 17 8.3.2 Calculation 9 Test report. Bibliography 21 Figure 1 - Thermal endurance graph for the determination of the relative temperature endurance (RTE).... .18 PDIEC/TS60216-7-1:2015 IECTS60216-7-1:2015@IEC2015 - 3 - INTERNATIONALELECTROTECHNICALCOMMISSION ELECTRICALINSULATIONMATERIALS THERMALENDURANCEPROPERTIES Part 7-1: Accelerated determination of relative thermal endurance using analytical test methods (RTEA) Instructionsforcalculationsbasedonactivationenergy FOREWORD all national ,electrotechnical committees (IEC National Committees). The object of IECis 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 agreement between the two organizations. 2) Theformal decisions oragreements 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 interestedIECNational Committees. 3) IEc Publications have the form of recommendations for international use and are accepted by IEC National Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 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 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 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 indispensablefortnecorrectapplicationofthispublication. (6 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 specification when the required support cannot be obtained for the publication of an International Standard, despite repeated e