BS EN 60085-2008 Electrical insulation - Thermal evaluation and designation《电绝缘 耐热性评定和设计》.pdf

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1、Electrical insulation Thermal evaluation and designation BS EN 60085:2008 raising standards worldwide NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BSI British Standards Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 06/07/2009 02:22, Uncontrolled Copy, (c) BSINation

2、al foreword This British Standard is the UK implementation of EN 60085:2008. It is identical to IEC 60085:2007. It supersedes BS EN 60085:2004 and BS EN 62114:2001, which are withdrawn. The UK participation in its preparation was entrusted to Technical Committee GEL/112, Evaluation and qualification

3、 of electrical insulating materials and systems. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. BSI 2009 ISB

4、N 978 0 580 56610 3 ICS 17.220.99; 29.035.01 BRITISH STANDARD BS EN 60085:2008 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2009. Amendments issued

5、since publication Amd. No. Date Text affected Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 06/07/2009 02:22, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD EN 60085 NORME EUROPENNE EUROPISCHE NORM January 2008 CENELEC European Committee for Electrotechnical Standardization Comit Europen de N

6、ormalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60085:2008 E ICS 29.035.01; 17.220.99 S

7、upersedes EN 60085:2004 and EN 62114:2001English version Electrical insulation - Thermal evaluation and designation (IEC 60085:2007) Isolation lectrique - Evaluation et dsignation thermiques (CEI 60085:2007) Elektrische Isolierung - Thermische Bewertung und Bezeichnung (IEC 60085:2007) This European

8、 Standard was approved by CENELEC on 2007-12-01. 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 co

9、ncerning such national standards may be obtained 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 in

10、to its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Irel

11、and, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 06/07/2009 02:22, Uncontrolled Copy, (c) BSIEN 60085:2008 - 2 - Foreword

12、 The text of document 112/74/FDIS, future edition 4 of IEC 60085, prepared by IEC TC 112, Evaluation and qualification of electrical insulating materials and systems, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60085 on 2007-12-01. This European Standard supersed

13、es EN 60085:2004 and EN 62114:2001. The major technical changes with regard to EN 60085:2004 concern the fact that EN 60085:2008 is an amalgamation of EN 60085:2004 together with EN 62114:2001. The following dates were fixed: latest date by which the EN has to be implemented at national level by pub

14、lication of an identical national standard or by endorsement (dop) 2008-09-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2010-12-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60085:2007 was a

15、pproved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following note has to be added for the standard indicated: IEC 60216-6 NOTE Harmonized as EN 60216-6:2006 (not modified). _ BS EN 60085:2008 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA

16、STANDARDS, 06/07/2009 02:22, Uncontrolled Copy, (c) BSI - 3 - EN 60085:2008 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following referenced documents are indispensable for the application of this document. For dated refe

17、rences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title E

18、N/HD Year IEC 60216-1 - 1)Electrical insulating materials - Properties of thermal endurance - Part 1: Ageing procedures and evaluation of test results EN 60216-1 2001 2)IEC 60216-5 - 1)Electrical insulating materials - Thermal endurance properties - Part 5: Determination of relative thermal enduranc

19、e index (RTE) of an insulating material EN 60216-5 2003 2)IEC 60505 - 1)Evaluation and qualification of electrical insulation systems EN 60505 2004 2)IEC 61857 Series Electrical insulation systems - Procedures for thermal evaluation EN 61857 Series IEC 61858 - 1)Electrical insulation systems - Therm

20、al evaluation of modifications to an established wire-wound EIS EN 61858 2005 2)1)Undated reference. 2)Valid edition at date of issue. BS EN 60085:2008 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 06/07/2009 02:22, Uncontrolled Copy, (c) BSI 4 60085 IEC:2007 ELECTRICAL INSULATION THERMAL E

21、VALUATION AND DESIGNATION 1 Scope This International Standard now distinguishes between thermal classes for electrical insulation systems and electrical insulating materials. It establishes the criteria for evaluating the thermal endurance of either electrical insulating materials (EIM) or electrica

22、l insulation systems (EIS). It also establishes the procedure for assigning thermal classes. This standard is applicable 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 referen

23、ced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60216-1: Electrical insulating materials Properties of thermal end

24、urance Part 1: Ageing procedures and evaluation of test results IEC 60216-5, Electrical insulating materials Thermal endurance properties Part 5: Determination of relative thermal endurance index (RTE) of an insulating material IEC 60505: Evaluation and qualification of electrical insulation systems

25、 IEC 61857 (all parts), Electrical insulation systems Procedures for thermal evaluation IEC 61858, Electrical insulation 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 6050

26、5, as well as the following, apply. 3.1 electrical insulating material (EIM) solid or fluid with negligibly low electric conductivity, or a simple combination of such materials, used to separate conducting parts at different electrical potential in electrotechnical devices NOTE 1 A “simple combinati

27、on” may be a combination of EIM delivered in a joint state, for example, a flexible material consisting of a paper laminated 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 te

28、sted as such. BS EN 60085:2008 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 06/07/2009 02:22, Uncontrolled Copy, (c) BSI 5 3.2 electrical insulation system (EIS) insulating structure containing one or more EIM together with associated conducting parts employed in an electrotechnical device

29、 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 candidate EIM 3.5 candidate EIS EIS under evaluation to determine its service

30、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) numerical value of the temperature in degrees Celsius, up to which the reference E

31、IM 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 endpoint of the candidate EIM is the same as the estimated time to endpoint of the

32、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 a known comparative functional evaluation 3.10 EIS relative thermal endurance

33、 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 procedures in a comparative test 3.11 thermal class designation that is equal to the n

34、umerical 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. BS EN 60085:2008 60085 IEC:2007 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 06/0

35、7/2009 02:22, Uncontrolled Copy, (c) BSI 6 60085 IEC:2007 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

36、individual components according to IEC 60505. 4 General 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. T

37、he thermal class for an EIS may not be directly related 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 th

38、e thermal endurance of the individual EIM. On the other 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 o

39、f which it is a component 4.1 Maximum use temperature The 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 un

40、der 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, or exceptional conditions of service exist. 4.2 Other factors of influence Apart from thermal factors, the ability

41、 of the EIS to fulfil its function is affected by many factors, such as electrical and mechanical stresses, vibration, deleterious atmospheres and chemicals, moisture, dirt and radiation. All such factors should be taken into account when designing particular electrotechnical devices and further gui

42、dance on the evaluation of these aspects may be found in IEC 60505. 4.3 Thermal evaluation of EIM Insulating materials and simple combinations of insulating materials shall follow the precepts set forth in IEC 60216-1 and be evaluated in accordance with IEC 60216-5 and refer to expected service cond

43、itions. 4.4 Thermal evaluation of EIS Experience has demonstrated that, under normal operating conditions, satisfactory economic life is obtained for many electrotechnical devices such as rotating machines, transformers, etc., that are designed and built in accordance with standards based on thermal

44、 evaluations of EIS. Test procedures for the thermal evaluation of EIS shall follow the precepts set forth in IEC 60505. Specific test procedures for EIS intended for use in low-voltage devices are listed in IEC 61857 and IEC 61858. 5 Thermal class Since the temperature in electrotechnical devices i

45、s very often the dominant ageing factor affecting the EIM in the EIS, certain basic thermal classes are useful and have been recognized as such internationally. Where a thermal class is specified for an EIS, this means BS EN 60085:2008 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 06/07/200

46、9 02:22, Uncontrolled Copy, (c) BSI 7 the recommended maximum continuous use temperature in degrees Celsius for which that combination of EIM is appropriate. Thermal classes shall be assigned to an EIS based on service experience or on the results of functional tests based upon test procedures in ac

47、cordance with 4.4. Thermal classes are assigned to an EIS based on the EIS ATE or EIS RTE. While a thermal class may be applied to an EIM based on service experience or on the results of testing in accordance with 4.3, this does not automatically imply that it is suitable for use in an EIS of that t

48、hermal class, or that the thermal class of an EIS in which it is a part is the same as for that EIM. Designations for the thermal classes of are as follows: Table 1 Thermal class assignment Letter designation aATE or RTE C Thermal class C 90 105 90 Y 105 120 105 A 120 130 120 E 130 155 130 B 155 180

49、 155 F 180 200 180 H 200 220 200 N 220 250 220 R 250b 275 250 - aIf desired, the letter designation may be added in parentheses, e.g. Class 180 (H). Where space is a factor, such as on a nameplate, the product TC may elect to use only the letter designation. b Designations of thermal classes over 250 shall increase by increments of 25 and be designated accordingly. BS EN 60085:2008 60085 IEC:2007 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 06/07/2009 02:22, Uncontrolled Copy, (c) BSI