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 408: Miscellaneous tests Long-term stability test of polyethylene and polypropylene compoundsBS EN 6
2、0811-408:2012National forewordThis British Standard is the UK implementation of EN 60811-408:2012. It isidentical to IEC 60811-408:2012. In the UK, the relationship between the supersessions of BS EN 60811 seriescan be summarized as follows.Superseded standards are withdrawnThe UK participation in i
3、ts 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 the necessary provisio
4、ns of acontract. Users are responsible for its correct application. The British Standards Institution 2012Published by BSI Standards Limited 2012ISBN 978 0 580 65318 6ICS 29.035.01; 29.060.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was pub
5、lished under the authority of the StandardsPolicy and Strategy Committee on 31 July 2012.Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 60811-408:2012BS EN 60811-100 together with Supersedes - -201, -202, -203, -501 BS EN 60811-1-1:1995 -301, -302, -411, -601, -6
6、02, -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 60811-4-2:2004 -504, -505, -506 B
7、S EN 60811-1-4:1995 -508, -509 BS EN 60811-3-1:1995EUROPEAN STANDARD EN 60811-408 NORME EUROPENNE EUROPISCHE NORM June 2012 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Cent
8、re: 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 60811-408:2012 E ICS 29.035.01; 29.060.20 Supersedes EN 60811-4-2:2004 (partially)English version Electric and optical fibre cables - Tes
9、t methods for non-metallic materials - Part 408: Miscellaneous tests - Long-term stability test of polyethylene and polypropylene compounds (IEC 60811-408:2012) Cbles lectriques et fibres optiques - Mthodes dessai pour les matriaux non-mtalliques - Partie 408: Essais divers - Essai de stabilit long
10、terme pour les mlanges polythylne et polypropylne (CEI 60811-408:2012) Kabel, isolierte Leitungen und Glasfaserkabel - Prfverfahren fr nichtmetallene Werkstoffe - Teil 408: Sonstige Prfungen - Langzeit(Lebensdauer)-Prfung fr Polyethylen- und Polypropylenmischungen (IEC 60811-408:2012) This European
11、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 the status of a national standard without any alteration. Up-to-date lists and bibliographical references con
12、cerning 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 (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC
13、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 Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Gr
14、eece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. EN 60811-408:2012 - 2 - Foreword The text of document 20/1292/FDIS, future edition 1 of IEC
15、 60811-408, prepared by IEC/TC 20 “Electric cables“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60811-408:2012. 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 o
16、r 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 A of EN 60811-4-2:2004 (partially). Full details of the replacements are shown in Annex A of EN 60811-100:2012. There are n
17、o 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 possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN sha
18、ll 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 within Certain Voltage Limits (LVD - 2006/95/EC). Endorsement notice The text of the International Standard IEC 608
19、11-408:2012 was approved 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 60811-601 NOTE Harmonized as EN 60811-601. BS EN 60811-408:2012- 3 - EN 60811-408:2012 Annex ZA (normativ
20、e) Normative references to international publications 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
21、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 EN/HD Year IEC 60811-100 2012 Electric and optical fi
22、bre cables - Test methods for non-metallic materials - Part 100: General EN 60811-100 2012 IEC 60811-410 - 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 cond
23、uctors EN 60811-410 - ISO 188 - Rubber, vulcanized or thermoplastic - Accelerated ageing and heat-resistance tests - - BS EN 60811-408:2012 2 60811-408 IEC:2012 CONTENTS 1 Scope . 6 2 Normative references . 6 3 Terms and definitions . 6 4 Test method . 6 4.1 Test method for unfilled cables 6 4.1.1 G
24、eneral . 6 4.1.2 Apparatus 7 4.1.3 Sample and test piece preparation 7 4.1.4 Ageing procedure 7 4.1.5 Evaluation of the result 8 4.2 Test method for fully filled cables 8 4.2.1 General . 8 4.2.2 Apparatus 8 4.2.3 Sample and test piece preparation 8 4.2.4 Ageing procedure 8 4.2.5 Evaluation of the re
25、sult 8 5 Test report 8 Annex A (normative) Sample conditioning 9 Bibliography 10 BS EN 60811-408:201260811-408 IEC:2012 5 INTRODUCTION The IEC 60811 series specifies the test methods to be used for testing non-metallic materials of all types of cables. These test methods are intended to be reference
26、d 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 methods are accepted as basic and fundamental and have been developed and used over many years princi
27、pally 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 offshore applications. BS EN 60811-408:2012 6 60811-408 IEC:2012 ELECTRIC AND OPTICAL FIBRE CABLE
28、S TEST METHODS FOR NON-METALLIC MATERIALS Part 408: Miscellaneous tests Long-term stability test of polyethylene and polypropylene compounds 1 Scope This Part 408 of IEC 60811 gives the procedure to establish as to whether or not the quality of a cables components will be satisfactory over the propo
29、sed life of a communication cable. This test is considered only as a material selection test to ensure that the chosen materials are satisfactory for the intended life of the cable. The test duration makes the test unsuitable for routine quality control testing; one method found suitable for monitor
30、ing raw materials is given in IEC 60811-410. 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 edition cited applies. For undated references, the latest edition of
31、 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 IEC 60811-410, Electric and optical fibre cables Test methods for non-metallic materials Part 410: Miscellaneous tests Test met
32、hod for copper-catalyzed oxidative degradation of polyolefin insulated conductors ISO 188, Rubber, vulcanized or thermoplastic Accelerated ageing and heat resistance tests 3 Terms and definitions For the purposes of this document, the terms and definitions given in IEC 60811-100 apply. 4 Test method
33、 4.1 Test method for unfilled cables 4.1.1 General This part of IEC 60811 shall be used in conjunction with IEC 60811-100. NOTE This test method is only applicable to communication cables containing copper pairs. A similar test method applicable to electric cables for power distribution is under con
34、sideration. The need to establish whether or not the quality of a cables components will be satisfactory over the proposed life of the cable is well recognized. In particular, polyolefin insulation shall have sufficient resistance to ageing in service. The definition of test duration, temperature, a
35、tmosphere and failure criteria shall be carefully chosen. BS EN 60811-408:201260811-408 IEC:2012 7 One of the two test conditions, differing in test temperatures and duration, shall be used according to the severity of cable system conditions, as specified in the cable standard. Condition A: Applies
36、 to insulations in cables or installations under moderate conditions generally below 50 C such as directly buried cables, cables in ducts or troughs, or cables exposed above ground in temperate climates: 100 C for 42 days. Condition B: Applies to insulation in cables or installations in above-ground
37、 situations under hot conditions, for instance cabinets or terminal boxes: 105 C for 42 days. 4.1.2 Apparatus For the purpose of this test, the different equipment used is as follows: a) An air oven generally in accordance with ISO 188 and complying especially with the following criteria: the mean t
38、emperature throughout the test shall be controlled to within 0,5 C of the specified temperature; the maximum variation of temperature throughout the test shall not exceed 1,0 C of the specified temperatures; exchange of clean, dry air: at least 6 changes of air per hour; in case of dispute, the maxi
39、mum rate of change shall be 10 changes per hour. NOTE Alternatively, a test apparatus consisting of one or more cells having the following dimensions may be used, provided that the above criteria are followed. Cell height: at least 250 mm; Cell diameter: at least 75 mm; Height to diameter ratio: bet
40、ween 3:1 and 4:1. b) An air flow meter with a measuring range dependent on the size of the air oven according to a). c) A thermocouple or thermometer allowing a resolution of not greater than 0,1 C and total measurement uncertainty not greater than 0,2 C. d) An analytical balance accurate to 0,5 mg
41、and readable and repeatable to 0,1 mg. 4.1.3 Sample and test piece preparation Three samples of each colour and 2 m in length shall be taken from a sample of unfilled finished cable. They shall be subjected to the test described in Annex A, and shall satisfy the requirement in Clause A.4. At least t
42、hree test pieces of 200 mm length shall then be cut from each sample that has been tested as specified above. These test pieces shall be cut at equidistant intervals, the first being taken at 200 mm from one end of the sample. One end of each 200 mm length shall be wound manually around the other en
43、d to give at least 10 contiguous turns. They shall be visually examined for cracks and splits. 4.1.4 Ageing procedure The test pieces so formed shall be suspended in an air-circulating oven at (60 2) C for seven days. BS EN 60811-408:2012 8 60811-408 IEC:2012 4.1.5 Evaluation of the result At the en
44、d of the treatment period the test pieces, when visually examined, shall be free from cracks and splits. 4.2 Test method for fully filled cables 4.2.1 General See 4.1.1. For filled polyolefin insulated cables, compatibility of the combination of the insulation and filling compound shall be assessed.
45、 4.2.2 Apparatus See 4.1.2. 4.2.3 Sample and test piece preparation Three samples of each colour and 2,5 m in length shall be conditioned during seven days in the associated filling compound at the following temperatures: (60 2) C for filling compounds having a drop-point above 50 C and up to and in
46、cluding 70 C; (70 2) C for filling compounds having a drop-point above 70 C. NOTE For an explanation of the drop-point, see IEC 60811-601. Conditioning may be performed either on insulated cores by immersion in about 200 g of filling compound (except for the ends) contained in a glass vessel, or on
47、a cable. If a cable is used, care shall be taken in removing the test pieces after conditioning. After pre-conditioning, the samples shall be carefully wiped free of excess filling compound using an absorbent lint-free tissue. The ends which were not immersed in the filling compound shall be discard
48、ed, to obtain three samples of each colour and 2 m in length. These samples shall be subjected to the test described in Annex A, and shall satisfy the requirement in Clause A.4. Then, at least three test pieces of 200 mm length shall be cut from the each sample that has been tested as specified abov
49、e. These test pieces shall be cut at equidistant intervals, the first being taken at 200 mm from one end of the sample. One end of each 200 mm length shall be wound manually around the other end to give at least 10 contiguous turns. They shall be visually examined for cracks and splits. 4.2.4 Ageing procedure See 4.1.4. 4.2.5 Evaluation of the result See 4.1.5. 5 Test report The test report shall be in accordance with that given in IEC 60811-100. BS E
