1、raising standards worldwide NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BSI Standards Publication Standard conditions for use prior to and during the testing of solid electrical insulating materials BS EN 60212:2011National foreword This British Standard is the UK implemen
2、tation of EN 60212:2011. It is identical to IEC 60212:2010. It supersedes BS 2844:1995, which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee GEL/112, Evaluation and qualification of electrical insulating materials and systems. A list of organizations repre
3、sented 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 2011 ISBN 978 0 580 69534 6 ICS 17.220.99; 29.035.01 Compliance with a British Standar
4、d cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 August 2011. Amendments issued since publication Amd. No. Date Text affected BRITISH STANDARD BS EN 60212:2011 EUROPEAN STANDARD EN 60212 NORM
5、E EUROPENNE EUROPISCHE NORM July 2011 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2011 CENELEC - All rights of exploitation in a
6、ny form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60212:2011 E ICS 17.220.99; 29.035.01 Supersedes HD 437 S1:1984English version Standard conditions for use prior to and during the testing of solid electrical insulating materials (IEC 60212:2010) Conditions normales observ
7、er avant et pendant les essais de matriaux isolants lectriques solides (CEI 60212:2010) Standardbedingungen fr die Anwendung vor und whrend der Prfung von festen Elektroisolierstoffen (IEC 60212:2010) This European Standard was approved by CENELEC on 2011-01-19. CENELEC members are bound to comply w
8、ith 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 concerning such national standards may be obtained on application to the Central Secreta
9、riat 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 into its own language and notified to the Central Secretariat has the same status as the
10、 official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Po
11、land, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 60212:2011EN 60212:2011 Foreword The text of document (112/148/CDV), future edition 3 of IEC 60212, prepared by IEC TC 112, Evaluation and qualification of electrical insulating materials and system
12、s, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60212 on 2011-01-19. This European Standard supersedes HD 437 S1:1984. The significant technical changes with respect to HD 437 S1:1984 are as follows: the scope and normative references have been updated and terms a
13、nd definitions completely reviewed; technical details in Table 2 have been aligned to todays usage. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such pate
14、nt rights. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2011-10-19 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2014-01-19
15、 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60212:2010 was approved by CENELEC as a European Standard without any modification. _ BS EN 60212:2011EN 60212:2011 Annex ZA (normative) Normative references to international publications with their
16、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 amendments) applies. NOTE When an
17、international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60068-1 + corr. October + A1 1988 1988 1992 Environmental testing - Part 1: General and guidance EN 60068-1 1)1 9 9 4 IEC 60216-4-1 - Electrical
18、insulating materials - Thermal endurance properties - Part 4-1: Ageing ovens - Single-chamber ovens EN 60216-4-1 - ISO 62 2008 Plastics - Determination of water absorption EN ISO 62 2008 1) EN 60068-1 includes A1 to IEC 60068-1 + corr. October . BS EN 60212:20116 0 2 1 2 IEC:2010 C O N T E N T S I N
19、 T R O D U C T I O N . 5 1 S c o p e . 6 2 N o r m a t i ve r e fe r e n c e s . . 6 3 T e r m s a n d d e f i n i t i o n s . . 6 4 T e m p e r a t u r e a n d h u m i d i t y ( o r l i q u i d i m m e r s i o n ) r e c o m m e n d e d f o r p r e c o n d i t i o n i n g , c o n d i t i o n i n g a
20、 n d t e s t i n g . 8 5 P e r i o d o f c o n d i t i o n i n g . 8 6 P r o c e d u r e s f o r a t m o s p h e r i c p r e c o n d i t i o n i n g , c o n d i t i o n i n g , a n d t e s t i n g . . 9 7 L i q u i d i m m e r s i o n , c o n d i t i o n i n g a n d t e s t i n g . . 9 8 S t a n d a
21、 r d r e f e r e n c e a t m o s p h e r e . . 1 0 9 C o d e fo r s p e c i f y i n g p r e c o n d i t i o n i n g , c o n d i t i o n i n g a n d t e s t i n g . 1 0 1 0 R e p o r t . 1 0 T a b l e 1 C o d e s f o r p r e c o n d i t i o n i n g , c o n d i t i o n i n g a n d t e s t i n g . 1 0
22、T a b l e 2 S t a n d a r d a t m o s p h e r i c c o n d i t i o n s f o r t e s t i n g a n d c o n d i t i o n i n g . . 1 1 T a b l e 3 S t a n d a r d l i q u i d i m m e r s i o n c o n d i t i o n s f o r t e s t i n g a n d c o n d i t i o n i n g . 1 2 T a b l e 4 L i s t o f p r e f e r r
23、e d p e r i o d s f o r p r e c o n d i t i o n i n g a n d c o n d i t i o n i n g . . 1 2 BS EN 60212:201160212 IEC:2010 5 INTRODUCTION Many electrical insulating materials have properties which are affected by the temperature or humidity, or both, of the atmospheres to which they are subjected. I
24、t is usually necessary, therefore, when testing these materials, to control both temperature and humidity prior to testing, as well as the conditions in which the specimens are actually tested. The selection of appropriate conditions and tests should be decided according to the materials specificati
25、on and the intended application. Unless otherwise specified, specimens should be conditioned and measured in the same climate as that in which they are to be tested. When giving results of tests on electrical insulating materials likely to be affected by those factors, it is important that the relev
26、ant conditions to which the test specimens were exposed are reported. Specifications for such materials should, therefore, identify the atmospheres to which the test specimens should be exposed before testing and the conditions under which the tests are to be made. BS EN 60212:2011 6 60212 IEC:2010
27、STANDARD CONDITIONS FOR USE PRIOR TO AND DURING THE TESTING OF SOLID ELECTRICAL INSULATING MATERIALS 1 Scope This International Standard gives the accepted conditions of exposure time, temperature, atmospheric humidity and liquid immersion for use in testing solid electrical insulating materials. Th
28、e range is sufficiently wide to enable suitable conditions to be selected so that either of the primary objects, set out below as a) and b), of conditioning can be achieved. These objectives aim to obtain greater reproducibility of test results by: a) partly counteracting the variations of the prope
29、rties of the material due to the past history of the test specimens (often known as “normalizing“, here called preconditioning), and b) ensuring uniformity of conditions during the testing. This standard is not intended to be applied for determining the influence of exposure to certain temperatures
30、and humidity or immersions in liquids, on the properties of a material. Procedures pertaining to the effect of an environment on a material are given in various parts of IEC 60068. 2 Normative references The following referenced documents are indispensable for the application of this document. For d
31、ated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60068-1:1988, Environmental testing Part 1: General and guidance Amendment 1 (1992) IEC 60216-4-1, Electrical insulating materials Thermal en
32、durance properties Part 4-1: Ageing ovens Single-chamber ovens ISO 62:2008: Plastics Determination of water absorption 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3 . 1 insulating material solid with negligibly low electric conductivity, used
33、 to separate conducting parts at different electrical potentials NOTE 1 In English, the term “insulating material“ is sometimes used in a broader sense to also designate insulating liquids and gases. NOTE 2 An insulating material may be a solid, a liquid or a gas, or a mixture of these. This standar
34、d refers only to a solid insulating material. 3 . 2 specimen typical sample of the insulating material under test, as described in the relevant test specification BS EN 60212:201160212 IEC:2010 7 3 . 3 preconditioning treatment of a specimen with the object of removing or partly counteracting the ef
35、fect of its previous history with respect, principally, to the temperature and humidity to which it has been exposed NOTE 1 This treatment is sometimes known as “normalizing“. NOTE 2 Preconditioning usually precedes conditioning of a specimen. When the combination of temperature and humidity for con
36、ditioning is the same as that prescribed for preconditioning, the preconditioning may be said to take the place of conditioning. NOTE 3 Preconditioning may be effected by subjecting the specimen to climatic, electrical or any other conditions required by the relevant test specification. 3 . 4 condit
37、ioning (of a specimen) subjection of a specimen for a specified duration to specific climatic conditions (usually a specified temperature and a specified relative humidity) or to an atmosphere of specified relative humidity or to complete immersion in water or other liquid at a specified temperature
38、 NOTE 1 When the combination of temperature and humidity for conditioning is the same as that prescribed for preconditioning, the preconditioning and conditioning may be merged and the preconditioning may be said to take the place of conditioning. NOTE 2 According to circumstances, the space used fo
39、r conditioning may be a whole laboratory room in which the specified conditions are maintained within the prescribed tolerances, or a special chamber. 3 . 5 chamber enclosure or space in some part of which the specified conditions can be achieved 3 . 6 working space part of the chamber in which the
40、specified conditions can be maintained within the specified tolerances 3 . 7 period of conditioning time that a specimen is subjected to conditioning 3 . 8 recovery treatment of a specimen, after conditioning, in order that the properties remain stable before measurement 3 . 9 test conditions temper
41、ature and humidity of the atmosphere surrounding the specimen, or temperature and kind of liquid (for liquid immersion), at the time tests are carried out 3.10 standard reference atmosphere atmosphere to which values measured under any other atmospheric conditions are corrected by calculation 3.11 r
42、elative humidity ratio of the actual vapour pressure (which indicates the amount of water vapour present in the air) to the theoretical maximum (saturation) vapour pressure at the same temperature, expressed as a percentage BS EN 60212:2011 8 60212 IEC:2010 3.12 vapour pressure pressure exerted by a
43、 vapour in equilibrium with its solid or liquid phase 3.13 saturation vapour pressure maximum possible pressure exerted by a vapour in equilibrium with its solid or liquid phase, such that any increase will initiate within the vapour a change to a more condensed state 3.14 ageing irreversible change
44、s in one or more properties of a material as a result of its normal use or as a result of time through the action of an electrical, thermal, mechanical and/or environmental stress 4 Temperature and humidity (or liquid immersion) recommended for preconditioning, conditioning and testing The recommend
45、ed standard conditions of temperature and humidity (or liquid immersion) for preconditioning, conditioning and testing are given in Tables 2 and 3. Parameters should be carefully chosen so that treatment does not cause ageing in a test specimen. When preconditioning is required, one of the standard
46、atmospheres or one of the dry-hot conditions given in Table 2 may be used for a time specified in the material specification, (e.g. 24 h 2 h). It is usual to specify (55 2) C with a relative humidity of less than 20 %. Preconditioning can be necessary in order to eliminate the effects of stress appe
47、aring after the moulding process of some plastic materials or as a drying treatment before the test procedure starts. The preconditioning shall normally be handled in a different environment. The environment surrounding the sample (such as oil) shall be defined such that it does not have a deleterio
48、us effect on the samples properties. There may be more than one preconditioning environment required to remove previous history and maximize reproducibility of results. Immersion in oil/liquid is only needed if testing is required to be undertaken in a liquid. A preconditioning fluid will have an in
49、fluence on the test properties so further conditioning may be needed before testing and a recovery procedure required, as given in IEC 60068-1. The property of the sample will change through the time frame of the test unless it is correctly prepared beforehand. 5 Period of conditioning The period of conditioning should be specified in the relevant material standard or test method. The period of conditioning will usually depend upon the type of material being tested. In general, it is not in
