1、Electrical insulation Thermalevaluation and designationBS EN 60085:2008raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI British StandardsNational forewordThis British Standard is the UK implementation of EN 60085:2008. It is identical to IEC 60085:
2、2007. It supersedes BS EN 60085:2004 and BS EN62114:2001, which are withdrawn.The UK participation in its preparation was entrusted to Technical CommitteeGEL/112, Evaluation and qualification of electrical insulating materials andsystems.A list of organizations represented on this committee can be o
3、btained onrequest to its secretary.This publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application. BSI 2009ISBN 978 0 580 56610 3ICS 17.220.99; 29.035.01BRITISH STANDARDBS EN 60085:2008Compliance with a British Standard canno
4、t confer immunity fromlegal obligations.This British Standard was published under the authority of the StandardsPolicy and Strategy Committee on 31 March 2009. Amendments issued since publicationAmd. No. Date Text affectedEUROPEAN STANDARD EN 60085 NORME EUROPENNE EUROPISCHE NORM January 2008 CENELE
5、C European Committee for Electrotechnical Standardization Comit Europen de Normalisation 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 worldw
6、ide for CENELEC members. Ref. No. EN 60085:2008 E ICS 29.035.01; 17.220.99 Supersedes 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 Isol
7、ierung - Thermische Bewertung und Bezeichnung (IEC 60085:2007) This European 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 standar
8、d without any alteration. Up-to-date lists and bibliographical references concerning 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
9、language made by translation under the responsibility of a CENELEC member into 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
10、, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 60085:2008 - 2 - Foreword The text of document 1
11、12/74/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 supersedes EN 60085:2004 and EN
12、 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 publication of an identica
13、l 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 approved by CENELEC as a
14、 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- 3 - EN 60085:2008 Annex ZA (normative) Normative references to int
15、ernational publications with their corresponding European publications The following referenced 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
16、 amendments) applies. NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60216-1 -1)Electrical insulating materials - Properties of thermal endurance - Part 1: Ageing procedures and e
17、valuation of test results EN 60216-1 20012)IEC 60216-5 -1)Electrical insulating materials - Thermal endurance properties - Part 5: Determination of relative thermal endurance index (RTE) of an insulating material EN 60216-5 20032)IEC 60505 -1)Evaluation and qualification of electrical insulation sys
18、tems EN 60505 20042)IEC 61857 Series Electrical insulation systems - Procedures for thermal evaluation EN 61857 Series IEC 61858 -1)Electrical insulation systems - Thermal evaluation of modifications to an established wire-wound EIS EN 61858 20052)1)Undated reference. 2)Valid edition at date of issu
19、e. BS EN 60085:2008 4 60085 IEC:2007 ELECTRICAL INSULATION THERMAL EVALUATION 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 en
20、durance of either electrical insulating materials (EIM) or electrical 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 relat
21、ed 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 applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IE
22、C 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 endurance properties Part 5: Determination of relative thermal endurance index (RTE) of an insulating material IEC
23、60505: Evaluation and qualification of electrical insulation systems 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 pu
24、rposes 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 conductivity, or a simple combination of such materials, used to separate conducting parts at different electri
25、cal 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 laminated on polyethylene terephthalate film. NOTE 2 For testing purposes, electrodes may be applied on material spec
26、imens without this combination formally constituting an EIS to be tested as such. BS EN 60085:2008 5 3.2 electrical insulation system (EIS) insulating structure containing one or more EIM together with associated conducting parts employed in an electrotechnical device 3.3 candidate EIM EIM under eva
27、luation 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 capability (thermal) 3.6 referen
28、ce 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 EIM possesses known, satisfactory
29、 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 reference EIM at a temperature e
30、qual 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 index (EIS RTE) numerical value
31、 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 numerical value of the recommende
32、d 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 60085:200860085 IEC:2007 6 60085 IEC:2007 NOTE 2 EIM with different thermal endurance indices (ATE/RTE according to I
33、EC 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 considerations Relation of EIM to EIS The description of an electrotechnical
34、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 to the thermal endurance of the individual EIM included in it. In the EIS, th
35、e 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 hand, problems of incompatibility between EIM may decrease the appropriate th
36、ermal 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 The thermal classes in this standard are numerically equal to the maximum tempe
37、rature 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 eithe
38、r 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 of the EIS to fulfil its function is affected by many factors, such as electrical and mechanical stresses, vibration, deleterious at
39、mospheres and chemicals, moisture, dirt and radiation. All such factors should be taken into account when designing particular electrotechnical devices and further guidance on the evaluation of these aspects may be found in IEC 60505. 4.3 Thermal evaluation of EIM Insulating materials and simple com
40、binations 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 conditions. 4.4 Thermal evaluation of EIS Experience has demonstrated that, under normal operating conditions, satisfactory economic life
41、 is obtained for many electrotechnical devices such as rotating machines, transformers, etc., that are designed and built in accordance with standards based on thermal evaluations of EIS. Test procedures for the thermal evaluation of EIS shall follow the precepts set forth in IEC 60505. Specific tes
42、t 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 is very often the dominant ageing factor affecting the EIM in the EIS, certain basic thermal classes are useful and have been recogniz
43、ed as such internationally. Where a thermal class is specified for an EIS, this means BS EN 60085:2008 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
44、on the results of functional tests based upon test procedures in accordance 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
45、automatically imply that it is suitable for use in an EIS of that thermal 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 designationaATE or RTE C Thermal cla
46、ss C 90 105 90 Y105 120 105 A120 130 120 E 130 155 130 B155 180 155 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 th
47、e letter designation. b Designations of thermal classes over 250 shall increase by increments of 25 and be designated accordingly. BS EN 60085:200860085 IEC:2007 8 60085 IEC:2007 Bibliography IEC 60216-6, Electrical insulating materials Thermal endurance properties Part 6: Determination of thermal e
48、ndurance indices (TI and RTE) of an insulating material using the fixed time frame method IEC 62101/TS, Electrical insulation systems Short-time evaluation of combined thermal and electrical stresses _ BS EN 60085:2008This page deliberately left blankBSI is the independent national body responsible
49、for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter.British Standards Institution (BSI)raising standards worldwideBSI Group Headquarters389 Chiswick High Road London W4 4AL UKTel +44 (0)20 8996 9001Fax +44 (0)20 8996 Standards are updated by amendment or revision. Users of BritishStandards should make sure that they possess t
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