BS EN 60811-410-2012 Electric and optical fibre cables Test methods for non-metallic materials Miscellaneous tests Test method for copper-catalyzed oxidative degradation of polyole.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 410: Miscellaneous tests Test method for copper-catalyzed oxidative degradation of polyolefin insula

2、ted conductorsBS EN 60811-410:2012National forewordThis British Standard is the UK implementation of EN 60811-410:2012. It isidentical to IEC 60811-410:2012.In the UK, the relationship between the supersessions of BS EN 60811 seriescan be summarized as follows.Superseded standards are withdrawnThe U

3、K participation in its preparation was entrusted 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 th

4、e necessary provisions of acontract. Users are responsible for its correct application. The British Standards Institution 2012Published by BSI Standards Limited 2012ISBN 978 0 580 65320 9ICS 29.035.01; 29.060.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This Brit

5、ish Standard was published under the authority of the StandardsPolicy and Strategy Committee on 31 July 2012.Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 60811-410:2012BS EN 60811-100 together with Supersedes - -201, -202, -203, -501 BS EN 60811-1-1:1995 -301,

6、-302, -411, -601, -602, -603, -604 BS EN 60811-5-1:2000 -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 60811-4-2:200

7、4 -504, -505, -506 BS EN 60811-1-4:1995 -508, -509 BS EN 60811-3-1:1995EUROPEAN STANDARD EN 60811-410 NORME EUROPENNE EUROPISCHE NORM June 2012 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Nor

8、mung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60811-410:2012 E ICS 29.035.01; 29.060.20 Supersedes EN 60811-4-2:2004 (partially)English version Electric and optica

9、l fibre cables - Test methods for non-metallic materials - Part 410: Miscellaneous tests - Test method for copper-catalyzed oxidative degradation of polyolefin insulated conductors (IEC 60811-410:2012) Cbles lectriques et fibres optiques - Mthodes dessai pour les matriaux non-mtalliques - Partie 410

10、: Essais divers - Mthode dessai pour la mesure de la dgradation par oxydation catalytique par le cuivre des conducteurs isols aux polyolfines (CEI 60811-410:2012) Kabel, isolierte Leitungen und Glasfaserkabel - Prfverfahren fr nichtmetallene Werkstoffe - Teil 410: Sonstige Prfungen - Prfverfahren fr

11、 die Sauerstoffalterung unter Kupfereinfluss fr polyolefinisolierte Leiter (IEC 60811-410:2012) This European Standard was approved by CENELEC on 2012-04-16. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard

12、 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 CEN-CENELEC Management Centre or to any CENELEC member. This European Standard exists in three official versions (Englis

13、h, 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 CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of A

14、ustria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, 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, Turkey and t

15、he United Kingdom. EN 60811-410:2012 - 2 - Foreword The text of document 20/1294/FDIS, future edition 1 of IEC 60811-410, prepared by IEC/TC 20 “Electric cables“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60811-410:2012. The following dates are fixed: latest date by

16、 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 which the national standards conflicting with the document have to be withdrawn (dow) 2015-04-16 This document supersedes Annex B of EN 60811

17、-4-2:2004 (partially). Full details of the replacements are shown in Annex A of EN 60811-100:2012. There are no technical changes with respect to EN 60811-4-2:2004, 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 poss

18、ibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. This standard covers the Principle Elements of the Safety Objectives for Electrical Equipment Designed for Use withi

19、n Certain Voltage Limits (LVD - 2006/95/EC). Endorsement notice The text of the International Standard IEC 60811-410:2012 was approved by CENELEC as a European Standard without any modification. BS EN 60811-410:2012- 3 - EN 60811-410:2012 Annex ZA (normative) Normative references to international pu

20、blications with their corresponding European publications 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 edition cited applies. For undated references, the latest edition of the refer

21、enced 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 EN/HD Year IEC 60811-100 2012 Electric and optical fibre cables - Test methods for non-metallic

22、materials - Part 100: General EN 60811-100 2012 BS EN 60811-410:2012 2 60811-410 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 Apparatus 6 4.3 Sample and test pieces preparation. 7 4.4 Test procedure 7 4.5

23、Measurements . 8 5 Test report 8 Annex A (normative) Instrument calibration 10 Bibliography 11 Figure 1 Evaluation of OIT from recorded-time-based thermogram . 9 Figure A.1 Representative melting endothermic for indium . 10 BS EN 60811-410:201260811-410 IEC:2012 5 INTRODUCTION The IEC 60811 series s

24、pecifies the test methods to be used for testing 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 o

25、r taping within cables. NOTE 2 These test methods 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, communicatio

26、n and control cables and cables for ships and offshore applications. BS EN 60811-410:2012 6 60811-410 IEC:2012 ELECTRIC AND OPTICAL FIBRE CABLES TEST METHODS FOR NON-METALLIC MATERIALS Part 410: Miscellaneous tests Test method for copper-catalyzed oxidative degradation of polyolefin insulated conduc

27、tors 1 Scope This Part 410 of IEC 60811 gives the procedure for copper-catalyzed oxidative degradation of a polyolefin, which is typically used for insulation in communication cables. Full test conditions, such as temperature, duration, etc. and full test requirements are not specified in this stand

28、ard; it is intended that they should be specified by the standard dealing with the relevant type of cable. 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 editio

29、n cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60811-100:2012, Electric and optical fibre cables Test methods for non-metallic materials Part 100: General 3 Terms and definitions For the purposes of this document, the te

30、rms and definitions given in IEC 60811-100 apply. 4 Test method 4.1 General The need for a manufacturer to monitor his cable production to ensure that it has adequate resistance to oxidation is well established. The Oxidation Induction Time (OIT) test has been found suitable for monitoring both raw

31、materials and cables for compliance with this requirement, once suitable materials have been selected. The OIT test is not suitable for the selection of materials. For this purpose, long-term thermal ageing tests are preferred. 4.2 Apparatus For the purposes of this test, the different equipment use

32、d is as follows: a) A differential thermal analyser or differential scanning calorimeter, capable of heating at rates of up to at least (20 1) K/min and maintaining the test temperature isothermally within 0,2 K and of automatic recording of differences in temperature (or differences in heat transfe

33、r) between the sample and a reference material to the required sensitivity and precision. b) A recorder capable of displaying heat flow or temperature difference on the Y-axis, and time on the X-axis. The time base shall be accurate to 1 % and be readable to 0,1 min. c) A gas-selector switch and reg

34、ulators for high-purity nitrogen and oxygen. BS EN 60811-410:201260811-410 IEC:2012 7 d) An analytical balance capable of weighing 30 g, and readable and repeatable to 0,1 mg. e) Test pieces holders: aluminium holders, each of approximately 6 mm to 7 mm in diameter, or of similar dimensions as suppl

35、ied by the manufacturer of the instrument. 4.3 Sample and test pieces preparation From a sample of the cable, prepare an appropriate number, e.g. four test pieces of different colours, of approximately 4 mm length containing the core. The test pieces shall be cut from an insulated core to yield 3 mg

36、 to 5 mg of insulating material. Insert one test piece in an aluminium holder. 4.4 Test procedure Before carrying out a test series, the instrument shall be calibrated and prepared as described in Annex A. Open valves on both the nitrogen and oxygen gas cylinders. Place the gas selector switch to th

37、e nitrogen (N2) position and adjust the flow rate to (50 5) ml/min using a flowmeter. Place the prepared test piece holder (see 4.3) in the differential thermal analyser and an empty aluminium holder in the reference position. NOTE Crimping the test piece with a suitable aluminium or stainless steel

38、 screen is optional. It may provide a better contact with the test piece holder. Purge with nitrogen for 5 min. Check the flow rate and readjust to (50 5) ml/min if required. Set signal amplification and recorder sensitivity to the full scale pen deflection associated with the exothermic reaction an

39、d set the temperature base at zero. Set the heating rate to 20 K/min and start the programmed heating. Continue heating until the specified test temperature, controlled to 1 C, is reached. Discontinue programmed heating and equilibrate the test piece to a constant temperature. Start to record the th

40、ermogram. A test temperature of 200 C has been found appropriate for polyethylene. To simplify the procedure, it is allowed to omit the programmed pre-heating and start directly at the test temperature. Once temperature equilibrium has been established (steady recorder signal), change purge gas to o

41、xygen, and adjust the flow rate to (50 5) ml/min. Mark this point on the recorder. This change-over point to oxygen purge is considered the zero time of the experiment (To). Continue the isothermal operation until maximum pen deflection is attained after commencement of the oxidative exotherm as sho

42、wn on the recorder (see Figure 1). In the case of a multi-step exotherm, continue the isothermal operation until maximum pen deflection occurs. When the test is completed, turn off the recorder and switch the gas selector back to nitrogen. Allow the differential thermal analyser to cool to the ambie

43、nt temperature. Repeat the entire test on a new test piece, three more times, thus generating a total of four thermograms. The use of a fresh aluminium reference holder for each test piece is optional. BS EN 60811-410:2012 8 60811-410 IEC:2012 4.5 Measurements Extend the recorded base line from time

44、 zero to beyond the oxidative exotherm. Extrapolate the steepest part of the exotherm to intercept the extended baseline (see Figure 1). The OIT shall be measured from zero to the smallest time interval practical, not exceeding 1 min. 5 Test report The test report shall be in accordance with that gi

45、ven in IEC 60811-100. BS EN 60811-410:201260811-410 IEC:2012 9 Key 1 power or T 5 switch to isothermal operation 2 time 6 switch to oxygen 3 programmed heat (nitrogen) 7 OIT 4 isothermal mode (oxygen) Figure 1 Evaluation of OIT from recorded-time-based thermogram BS EN 60811-410:2012 10 60811-410 IE

46、C:2012 Annex A (normative) Instrument calibration The instruments shall be calibrated as follows: a) Calibrate the instrument according to the manufacturers instructions before starting. Use analytical-grade indium as a temperature reference material. b) Place analytical-grade indium into an alumini

47、um holder with an aluminium cover. Place the sample, typically 6 mg, thus prepared, and a reference aluminium holder with cover into the instrument. Should it be necessary to clean the sample and the aluminium reference holder and cover, use petroleum ether or other suitable solvent to remove contam

48、inants. c) Programme the temperature of the scanner from 145 C to 165 C at a rate of 1 K/min, while recording the thermogram. d) Calibrate the instrument according to the manufacturers instructions in order to obtain an indium first order transition temperature of 156,6 C. For calibration purposes,

49、the melting point 156,6 C is defined as the intersection of the extrapolated peak onset and the extrapolated baseline (see Figure A.1). Figure A.1 Representative melting endothermic for indium BS EN 60811-410:201260811-410 IEC:2012 11 Bibliography IEC 60811-4-2:2004, Insulating and sheathing materials of electric and optical cables Common test methods Part 4-2: Methods specific to polyethylene and polypropylene compounds Tensile strength and elo