1、 IEC 60085Edition 4.0 2007-11INTERNATIONAL STANDARD NORME INTERNATIONALEElectrical insulation Thermal evaluation and designation Isolation lectrique Evaluation et dsignation thermiques IEC60085:2007THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2007 IEC, Geneva, Switzerland All rights reserved. U
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16、.0 2007-11INTERNATIONAL STANDARD NORME INTERNATIONALEElectrical insulation Thermal evaluation and designation Isolation lectrique Evaluation et dsignation thermiques INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE HICS 29.035.01; 17.220.99 PRICE CODECODE PRIXISBN
17、 2-8318-9387-9 2 60085 IEC:2007 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ELECTRICAL INSULATION THERMAL EVALUATION AND DESIGNATION FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IE
18、C 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,
19、 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-g
20、overnmental 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 I
21、EC 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 acc
22、epted 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 internati
23、onal 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 l
24、atter. 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its
25、 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 a
26、rising 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
27、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. International Standard IEC 60085 has been prepared by technical committee 112: Evaluation and qualificat
28、ion of electrical insulating materials and systems. This fourth edition cancels and replaces the third edition, published in 2004, and constitutes a technical revision. The major technical changes with regard to the previous edition concern the fact that this edition is an amalgamation of the third
29、edition of this standard together with IEC 62114:2001. The text of this standard is based on the following documents: FDIS Report on voting 112/74/FDIS 112/77/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
30、publication has been drafted in accordance with the ISO/IEC Directives, Part 2. 60085 IEC:2007 3 The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to
31、the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. 4 60085 IEC:2007 ELECTRICAL INSULATION THERMAL EVALUATION AND DESIGNATION 1 Scope This International Standard now distinguishes between thermal classes for electrical in
32、sulation systems and electrical insulating materials. It establishes the criteria for evaluating the thermal endurance of either electrical insulating materials (EIM) or electrical insulation systems (EIS). It also establishes the procedure for assigning thermal classes. This standard is applicable
33、where the thermal factor is the dominant ageing factor. NOTE A thermal class is not assigned to an EIM as related to its use in an EIS 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applie
34、s. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60216-1: Electrical insulating materials Properties of thermal endurance Part 1: Ageing procedures and evaluation of test results IEC 60216-5, Electrical insulating materials Thermal endu
35、rance properties Part 5: Determination of relative thermal endurance index (RTE) of an insulating material IEC 60505: Evaluation and qualification of electrical insulation systems IEC 61857 (all parts), Electrical insulation systems Procedures for thermal evaluation IEC 61858, Electrical insulation
36、systems Thermal evaluation of modifications to an established wire-wound EIS 3 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 60505, as well as the following, apply. 3.1 electrical insulating material (EIM) solid or fluid with negligibly low electric
37、conductivity, or a simple combination of such materials, used to separate conducting parts at different electrical potential in electrotechnical devices NOTE 1 A “simple combination” may be a combination of EIM delivered in a joint state, for example, a flexible material consisting of a paper lamina
38、ted on polyethylene terephthalate film. NOTE 2 For testing purposes, electrodes may be applied on material specimens without this combination formally constituting an EIS to be tested as such. 60085 IEC:2007 5 3.2 electrical insulation system (EIS) insulating structure containing one or more EIM tog
39、ether with associated conducting parts employed in an electrotechnical device 3.3 candidate EIM EIM under evaluation to determine its estimated thermal endurance 3.4 reference EIM material with known thermal endurance, preferably derived from service experience, used for comparative tests with the c
40、andidate EIM 3.5 candidate EIS EIS under evaluation to determine its service capability (thermal) 3.6 reference EIS established EIS evaluated on the basis of either a known service experience record or a known comparative functional evaluation 3.7 EIM assessed thermal endurance index (EIM ATE) numer
41、ical value of the temperature in degrees Celsius, up to which the reference EIM possesses known, satisfactory service experience in the specified application 3.8 EIM relative thermal endurance index (EIM RTE) numerical value of the temperature in degrees Celsius at which the estimated time to endpoi
42、nt of the candidate EIM is the same as the estimated time to endpoint of the reference EIM at a temperature equal to its EIM ATE 3.9 EIS assessed thermal endurance index (EIS ATE) numerical value of the temperature in degrees Celsius for the reference EIS as derived from known service experience or
43、a known comparative functional evaluation 3.10 EIS relative thermal endurance index (EIS RTE) numerical value of the temperature in degrees Celsius for the candidate EIS which is relative to the known EIS ATE of a reference EIS, when both EIS are subjected to the same ageing and diagnostic procedure
44、s in a comparative test 3.11 thermal class designation that is equal to the numerical value of the recommended maximum continuous use temperature in degrees Celsius NOTE 1 EIS subjected to operating temperatures exceeding its assigned thermal class can result in shorter expected life. 6 60085 IEC:20
45、07 NOTE 2 EIM with different thermal endurance indices (ATE/RTE according to IEC 60216-5) may be combined to form an EIS which has a thermal class that may be higher or lower than the recommended maximum continuous use temperature of any of the individual components according to IEC 60505. 4 General
46、 considerations Relation of EIM to EIS The description of an electrotechnical device as being of a particular thermal class does not mean, and must not be taken to imply, that each EIM used in its construction is of the same thermal endurance. The thermal class for an EIS may not be directly related
47、 to the thermal endurance of the individual EIM included in it. In the EIS, the protective character of other EIM used in the system may improve the performance of an individual EIM allowing its use in an EIS with a thermal class greater than the thermal endurance of the individual EIM. On the other
48、 hand, problems of incompatibility between EIM may decrease the appropriate thermal class of the system below the thermal endurance of the EIM. Therefore, the thermal capabilities of an EIM shall not be deduced from the thermal class of an EIS of which it is a component 4.1 Maximum use temperature T
49、he thermal classes in this standard are numerically equal to the maximum temperature recommended for the EIS under normal operating conditions as defined by the product technical committee. Product TCs shall determine the operating conditions under which the maximum temperature of the device may differ from the thermal class of the EIS. Such situations may occur because either a shorter or longer life than normal is envisaged,
