EN 60811-401-2012 en Electric and optical fibre cables C Test methods for non-metallic materials C Part 401 Miscellaneous tests C Thermal ageing methods C Ageing in an air oven (In.pdf

1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationElectric and optical fibre cables Test methods for non-metallic materialsPart 401: Miscellaneous tests Thermal ageing methods Ageing in an air ovenBS EN 60811-401:2012National fo

2、rewordThis British Standard is the UK implementation of EN 60811-401:2012. It isidentical to IEC 60811-401:2012.In the UK, the relationship between the supersessions of BS EN 60811 seriescan be summarized as follows.Superseded standards are withdrawnThe UK participation in its preparation was entrus

3、ted by Technical CommitteeGEL/20, Electric cables, to Subcommittee GEL/20/17, Electric Cables - Lowvoltage.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions of acontract. Users ar

4、e responsible for its correct application. The British Standards Institution 2012Published by BSI Standards Limited 2012ISBN 978 0 580 65311 7ICS 29.035.01; 29.060.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authorit

5、y of the StandardsPolicy and Strategy Committee on 31 July 2012.Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 60811-401:2012BS EN 60811-100 together with Supersedes - -201, -202, -203, -501 BS EN 60811-1-1:1995 -301, -302, -411, -601, -602, -603, -604 BS EN 6081

6、1-5-1:2000 -401, -412 BS EN 60811-1-2:1995 -402, -502, -503, -606 BS EN 60811-1-3:1995 -403, -404, -507 BS EN 60811-2-1:1998 -405, -409 BS EN 60811-3-2:1995 -406, -511, -605, -607 BS EN 60811-4-1:2004 -407, -408, -410, -510, -512, -513 BS EN 60811-4-2:2004 -504, -505, -506 BS EN 60811-1-4:1995 -508,

7、 -509 BS EN 60811-3-1:1995EUROPEAN STANDARD EN 60811-401 NORME EUROPENNE EUROPISCHE NORM June 2012 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B -

8、 1000 Brussels 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60811-401:2012 E ICS 29.035.01; 29.060.20 Supersedes EN 60811-1-2:1995 (partially) + A2:2000 (partially)English version Electric and optical fibre cables - Test m

9、ethods for non-metallic materials - Part 401: Miscellaneous tests - Thermal ageing methods - Ageing in an air oven (IEC 60811-401:2012) Cbles lectriques et fibres optiques - Mthodes dessai pour les matriaux non-mtalliques - Partie 401: Essais divers - Mthodes de vieillissement thermique - Vieillisse

10、ment en tuve air(CEI 60811-401:2012) Kabel, isolierte Leitungen und Glasfaserkabel - Prfverfahren fr nichtmetallene Werkstoffe - Teil 401: Sonstige Prfungen - Thermische Alterungsverfahren - Alterung im Wrmeschrank (IEC 60811-401:2012) This European Standard was approved by CENELEC on 2012-04-16. CE

11、NELEC 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 concerning such national standards may be obtained on

12、 application to the CEN-CENELEC Management Centre 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 C

13、EN-CENELEC Management Centre has the same status as the 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, Li

14、thuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. EN 60811-401:2012 - 2 - Foreword The text of document 20/1285/FDIS, future edition 1 of IEC 60811-401, prepared by IEC/TC 20 “Electric cables

15、“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60811-401:2012. The following dates are fixed: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2013-01-16 latest date by w

16、hich the national standards conflicting with the document have to be withdrawn (dow) 2015-04-16 This document supersedes 8.1 and 8.4 of EN 60811-1-2:1995 + A2:2000 (partially). Full details of the replacements are shown in Annex A of EN 60811-100:2012. There are no technical changes with respect to

17、EN 60811-1-2:1995 + A2:2000, but see the Foreword to EN 60811-100:2012. This standard is to be read in conjunction with EN 60811-100. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible

18、 for identifying any or all such patent rights. This standard covers the Principle Elements of the Safety Objectives for Electrical Equipment Designed for Use within Certain Voltage Limits (LVD - 2006/95/EC) Endorsement notice The text of the International Standard IEC 60811-401:2012 was approved by

19、 CENELEC as a European Standard without any modification. BS EN 60811-401:2012- 3 - EN 60811-401:2012 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following documents, in whole or in part, are normatively referenced in thi

20、s document and are indispensable for its application. 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 international publication has been modified by common modifications, indi

21、cated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60228 - Conductors of insulated cables EN 60228 - IEC 60811-100 2012 Electric and optical fibre cables - Test methods for non-metallic materials - Part 100: General EN 60811-100 2012 IEC 60811-409 - Electric and optica

22、l fibre cables - Test methods for non-metallic materials - Part 409: Miscellaneous tests - Loss of mass test for thermoplastic insulations and sheaths EN 60811-409 - IEC 60811-501 - Electric and optical fibre cables - Test methods for non-metallic materials - Part 501: Mechanical tests - Tests for d

23、etermining the mechanical properties of insulating and sheathing compounds EN 60811-501 - IEC 60811-504 - Electric and optical fibre cables - Test methods for non-metallic materials - Part 504: Mechanical tests - Bending tests at low temperature for insulation and sheaths EN 60811-504 - BS EN 60811-

24、401:2012 2 60811-401 IEC:2012 CONTENTS INTRODUCTION . 5 1 Scope . 6 2 Normative references . 6 3 Terms and definitions . 6 4 Test method . 6 4.1 General . 6 4.2 Influence of the ageing treatment on the mechanical characteristics 7 4.2.1 Apparatus 7 4.2.2 Sample and test pieces preparation . 7 4.2.3

25、Ageing procedure 7 4.2.4 Measurements . 8 4.2.5 Expression of results . 8 4.2.6 Requirements 9 4.2.7 Test report . 9 4.3 Bending test on test pieces of core 9 4.3.1 Apparatus 9 4.3.2 Sample and test pieces preparation . 9 4.3.3 Procedure 9 4.3.4 Requirement 10 4.3.5 Test report . 10 Annex A (normati

26、ve) Methods of measuring air flow in ovens . 11 Annex B (normative) Test pieces preparation in presence of copper or metal coated copper conductor 15 Annex C (normative) Sample and test pieces preparation for ageing of complete cable . 18 Bibliography 19 Figure A.1 Flowmeter for air-flow control in

27、air ovens for method 2 13 Figure A.2 Calibration diagram of the capillary tube of the flowmeter for air-flow control in air ovens for method 2 . 14 Figure B.1 Specially prepared test pieces 17 Figure B.2 Dumb-bell test pieces preparation after ageing . 17 Table 1 Number of turns for bending test . 1

28、0 Table B.1 Summary of ageing tests for insulated conductors in case of difficulties in preparing test pieces due to conductor insulation or separator adhesion during ageing . 15 BS EN 60811-401:201260811-401 IEC:2012 5 INTRODUCTION The IEC 60811 series specifies the test methods to be used for test

29、ing non-metallic materials of all types of cables. These test methods are intended to be referenced in standards for cable construction and for cable materials. NOTE 1 Non-metallic materials are typically used for insulating, sheathing, bedding, filling or taping within cables. NOTE 2 These test met

30、hods are accepted as basic and fundamental and have been developed and used over many years principally for the materials in all energy cables. They have also been widely accepted and used for other cables, in particular optical fibre cables, communication and control cables and cables for ships and

31、 offshore applications. BS EN 60811-401:2012 6 60811-401 IEC:2012 ELECTRIC AND OPTICAL FIBRE CABLES TEST METHODS FOR NON-METALLIC MATERIALS Part 401: Miscellaneous tests Thermal ageing methods Ageing in an air oven 1 Scope This Part 401 of IEC 60811 specifies the procedure for ageing in an air oven,

32、 which typically applies to crosslinked and thermoplastic compounds used for insulating and sheathing materials. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the

33、edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60228, Conductors of insulated cables IEC 60811-100:2012, Electric and optical fibre cables Test methods for non-metallic materials Part 100: GeneralIEC 60811-409, Ele

34、ctric and optical fibre cables Test methods for non-metallic materials Part 409: Miscellaneous tests Loss of mass test for thermoplastic insulations and sheaths IEC 60811-501, Electric and optical fibre cables Test methods for non-metallic materials Part 501: Mechanical tests Tests for determining t

35、he mechanical properties of insulating and sheathing compounds IEC 60811-504, Electric and optical fibre cables Test methods for non-metallic materials Part 504: Mechanical tests Bending tests at low temperature for insulation and sheaths 3 Terms and definitions For the purposes of this document, th

36、e terms and definitions given in IEC 60811-100 apply. 4 Test method 4.1 General This part of IEC 60811 shall be used in conjunction with IEC 60811-100. Unless otherwise specified, tests shall be carried out at room temperature. An ageing treatment in an air oven may be required by the relevant cable

37、 standard: a) for prepared test pieces of insulating or sheathing material only (see 4.2.3.2); b) for prepared test pieces of cores (conductor and insulation) (see 4.2.3.2 and 4.2.3.3 if necessary); BS EN 60811-401:201260811-401 IEC:2012 7 c) for test pieces of completed cable (see 4.2.3.4); d) for

38、the loss of mass test (see IEC 60811-409). The ageing test a) or b) and the loss of mass test d) may be combined and carried out on the same test pieces when the aging time and aging temperature are the same. In general, mechanical characteristics are measured after treatment, but in some cases, the

39、 conductor and the separator, if any, cannot be removed without damaging the insulation and a bending test is realized on the circular conductor up to and including 16 mm2. Ageing followed by the bending test is considered the acceptance procedure in case of dispute. 4.2 Influence of the ageing trea

40、tment on the mechanical characteristics 4.2.1 Apparatus The ageing treatment is realized in an oven with natural air flow or air flow by pressure. The air shall enter the oven in such a way that it flows over the surface of the test pieces and leaves near the top of the oven. The oven shall have not

41、 less than 8 and not more than 20 complete air changes per hour at the specified ageing temperature. Two test methods for measuring air flow through an oven are given in Annex A. Unless otherwise specified in the relevant cable specification, a rotating fan inside the oven is allowed when testing ru

42、bber compounds. For all other compounds a fan shall not be used inside the oven, and in cases of dispute, rubber compounds shall also be tested in an oven which is designed to operate without a fan rotating inside it. 4.2.2 Sample and test pieces preparation The sample of the cable, or sheath remove

43、d from the cable, or samples of core, cut into pieces which are sufficiently long, shall be taken, preferably from positions close to that from which the samples for the tensile tests without ageing are taken in accordance with IEC 60811-501. Test pieces, dumb-bell or tubular, are prepared according

44、 to IEC 60811-501. Test pieces can consist of samples of core, cut into pieces which are sufficiently long. If, after ageing, the conductor and the separator, if any, can be removed without damaging the insulation, preparation of test pieces shall be carried out according to Annex B (Clause B.2). Fo

45、r circular conductors up to and including 16 mm2and having plain or metal coated wires and also when a separator around the conductor is included, a bending test is carried out on the aged test pieces. 4.2.3 Ageing procedure 4.2.3.1 General This test shall be carried out not less than 16 h after the

46、 extrusion or cross-linking, if any, of the insulating or sheathing compounds. It can be done on tubular or dumb-bell test pieces prepared according to IEC 60811-501 or insulated cores as described in the present standard. 4.2.3.2 Ageing procedure for test pieces prepared according to IEC 60811-501

47、and Clause B.1 and B.2.2 and Annex C of this standard This procedure shall be used for test pieces of insulating material without conductor and of sheathing material, according to IEC 60811-501, test pieces of cores with the original conductor (see Clause B.1), tubular test pieces with a reduced con

48、ductor (see B.2.2), BS EN 60811-401:2012 8 60811-401 IEC:2012 complete cable (see Annex C). Compounds of obviously different compositions shall not be tested at the same time in the same oven. Five test pieces, as specified in IEC 60811-501 shall be suspended vertically and substantially in the midd

49、le of the oven so that each test piece is at least 20 mm from any other test pieces. The test pieces shall not occupy more than 2 % of the volume of the oven. The test pieces shall be kept in the oven at the temperature and for the time specified for the material in the relevant standard for the type of cable. As soon as the ageing period is completed, the test pieces shall be removed from the oven and left at ambient temperature, avoiding direct sunlight, for a