BS EN 60811-202-2012 Electric and optical fibre cables Test methods for non-metallic materials General tests Measurement of thickness of non-metallic sheath《电缆和纤维光缆 非金属材料检测方法 通用测试 .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 202: General tests Measurement of thickness of non-metallic sheathBS EN 60811-202:2012National forew

2、ordThis British Standard is the UK implementation of EN 60811-202:2012. It isidentical to IEC 60811-202:2012.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Superseded standards are withdrawnThe UK participation in its preparation was entrusted

3、 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 are r

4、esponsible for its correct application. The British Standards Institution 2012Published by BSI Standards Limited 2012ISBN 978 0 580 65305 6ICS 29.035.01; 29.060.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority o

5、f the StandardsPolicy and Strategy Committee on 31 July 2012.Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 60811-202:2012BS 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 60811-5

6、-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, -5

7、09 BS EN 60811-3-1:1995EUROPEAN STANDARD EN 60811-202 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 - 10

8、00 Brussels 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60811-202:2012 E ICS 29.035.01; 29.060.20 Supersedes EN 60811-1-1:1995 (partially) + A1:2001 (partially)English version Electric and optical fibre cables - Test meth

9、ods for non-metallic materials - Part 202: General tests - Measurement of thickness of non-metallic sheath (IEC 60811-202:2012) Cbles lectriques et fibres optiques - Mthodes dessai pour les matriaux non-mtalliques - Partie 202: Essais gnraux - Mesure de lpaisseur des gaines non-mtalliques (CEI 60811

10、-202:2012) Kabel, isolierte Leitungen und Glasfaserkabel - Prfverfahren fr nichtmetallene Werkstoffe - Teil 202: Allgemeine Prfungen Messung der Wanddicke von nichtmetallenen Mnteln (IEC 60811-202:2012) This European Standard was approved by CENELEC on 2012-04-16. CENELEC members are bound to comply

11、 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 application to the CEN-CENELEC M

12、anagement 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 CEN-CENELEC Management Centre has

13、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, Lithuania, Luxembourg, Malta, the N

14、etherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. EN 60811-202:2012 - 2 - Foreword The text of document 20/1281/FDIS, future edition 1 of IEC 60811-202, prepared by IEC/TC 20 “Electric cables“ was submitted to the IEC-CENELE

15、C parallel vote and approved by CENELEC as EN 60811-202:2012. 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 which the national standards confl

16、icting with the document have to be withdrawn (dow) 2015-04-16 This document supersedes 8.2 of EN 60811-1-1:1995 + A1:2001 (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 60811-1-1:1995 + A1:2001, but see the

17、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 for identifying any or all such patent r

18、ights. 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 60811-202:2012 was approved by CENELEC as a European Standard without a

19、ny modification. BS EN 60811-202:2012- 3 - EN 60811-202:2012 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 this document and are indispensable for its

20、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, indicated by (mod), the relevant EN/HD applie

21、s. Publication Year Title EN/HD Year IEC 60811-100 2012 Electric and optical fibre cables - Test methods for non-metallic materials - Part 100: General EN 60811-100 2012 BS EN 60811-202:2012 2 60811-202 IEC:2012 CONTENTS INTRODUCTION . 5 1 Scope . 6 2 Normative references . 6 3 Terms and definitions

22、 . 6 4 Test method . 6 4.1 General . 6 4.2 Measuring equipment 6 4.3 Sample and test piece preparation 7 4.3.1 Sheaths applied over longitudinally regular surfaces . 7 4.3.2 Sheaths applied over longitudinally irregular surfaces . 7 4.3.3 Sheath applied over corrugated metallic sheaths . 7 4.4 Measu

23、ring procedure . 7 4.5 Evaluation of the measurement results 8 5 Test report 8 Bibliography 12 Figure 1 Measurement of sheath thickness (circular inner profile) 9 Figure 2 Measurement of sheath thickness (irregular circular inner profile) 9 Figure 3 Measurement of sheath thickness (non-circular inne

24、r profile) . 10 Figure 4 Measurement of sheath thickness (irregular outer surface) 10 Figure 5 Measurement of sheath thickness (twin sheathed flat cable) 11 Figure 6 Measurement of sheath thickness (flat cable with single cores) 11 BS EN 60811-202:201260811-202 IEC:2012 5 INTRODUCTION The IEC 60811

25、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 referenced in standards for cable construction and for cable materials. NOTE 1 Non-metallic materials are typically used for insulating, sheathing, bedding, f

26、illing or 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, comm

27、unication and control cables and cables for ships and offshore applications. BS EN 60811-202:2012 6 60811-202 IEC:2012 ELECTRIC AND OPTICAL FIBRE CABLES TEST METHODS FOR NON-METALLIC MATERIALS Part 202: General tests Measurement of thickness of non-metallic sheath 1 Scope This Part 202 of IEC 60811

28、gives the methods for measuring thicknesses of non-metallic sheath which apply to the most common types of sheathing compounds (cross-linked, PVC, PE, PP, etc.). 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for

29、 its application. For dated references, only the edition 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

30、and definitions For the purposes of this document, the 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. The measurement of

31、sheath thickness may be required as an individual test, or as a step in the procedure for carrying out other tests, such as the measurement of mechanical properties. The test method applies to the measurement of all sheaths for which thickness limits are specified, for example separation sheaths, as

32、 well as external sheaths. In each case, the method of selecting samples shall be in accordance with the relevant cable standard. 4.2 Measuring equipment A measuring microscope or a profile projector of at least 10 x magnification or an optical digital image analyser shall be used. All types of equi

33、pment shall allow a reading of 0,01 mm and an estimated reading to three decimal places when measuring insulation with a specified thickness less than 0,5 mm. For sheaths applied over longitudinally irregular surfaces such as corrugated metallic sheaths, a micrometer having a ball nose radius of 1 m

34、m and allowing a reading of 0,01 mm BS EN 60811-202:201260811-202 IEC:2012 7 may be used. This method is suitable only for corrugations having a radius greater than 1 mm. In case of doubt, the measuring microscope shall be taken as the reference method. 4.3 Sample and test piece preparation 4.3.1 Sh

35、eaths applied over longitudinally regular surfaces After all materials, if any, inside and outside the sheath have been removed, each test piece shall be prepared by cutting a thin slice along a plane perpendicular to the longitudinal axis of the cable, using a suitable device. If the sheath carries

36、 an indenting marking, thus giving rise to a local reduction in thickness, the test piece shall include such marking. 4.3.2 Sheaths applied over longitudinally irregular surfaces Cut a short piece of sheath, perpendicular to the longitudinal axis of the cable, including at least one complete pitch o

37、r helix formed by the underlying tape. If using a ball nose micrometer, the sample may be left whole. If using a microscope or profile projector, the test piece shall be prepared by cutting six thin longitudinal slices (parallel to the cable axis), using a suitable device. 4.3.3 Sheath applied over

38、corrugated metallic sheaths A sample of complete cable shall be taken, 500 mm from the end of the drum and of sufficient length to include two peaks and two troughs. A reference line shall be drawn on the outer surface of the over sheath, parallel to the axis of the cable. The position of the minimu

39、m thickness shall be determined on an annular ring taken from the end of the sample. A strip shall then be cut at this minimum point parallel to the axis of the cable (the previously drawn reference line shall be used to locate this position). 4.4 Measuring procedure The test piece shall be placed u

40、nder the measuring equipment with the plane of the cut perpendicular to the optical axis. a) When the inner profile of the test piece is of circular form, six measurements shall be made radially, each approximately 60, as shown in Figure 1. b) If the substantially circular inner surface is not regul

41、ar or smooth, six measurements shall be made radially at the positions where the sheath is thinnest, as shown in Figure 2. c) When the inner profile exhibits deep grooves caused by the cores, radial measurements shall be taken at the bottom of each groove, as shown in Figure 3. When the number of gr

42、ooves exceeds six, item b) applies. d) In order to eliminate the influence of any irregularities on the outer surface, which may be due to the presence of a proofed tape or a ribbed sheath finish, the measurements shall be made as shown in Figure 4. e) In the case of sheathed flat cables, measuremen

43、ts shall be taken on lines approximately parallel to the minor axis and on the major axis of the cross-section, at the position of each core, one of the measurements being, however, made at the thinnest place, as shown in Figure 5. f) For sheathed flat cables composed of up to and including six sing

44、le cores, measurement shall be taken as shown in Figure 6: on both rounded off sides, along the major axis of the cross-section; BS EN 60811-202:2012 8 60811-202 IEC:2012 on both flat sides, on the first and last core, and at the thinnest place (plus opposite sheath thickness), if this does not coin

45、cide with any of the other measurements. For cables composed of more than six cores, the above applies but measurements shall also be taken on the middle core, or on one of the two middle cores in the case of an even number of cores. g) For cables with a sheath applied over longitudinally irregular

46、surfaces, the piece of sheath prepared in accordance with 4.3.2 shall be measured using a ball nose micrometer, to determine the minimum thickness. Alternatively, the six thin longitudinal slices prepared in accordance with 4.3.2 shall be measured optically to determine the minimum thickness. h) For

47、 cables with a sheath applied over a corrugated metal sheath, four measurements shall be taken on the longitudinal strip prepared in accordance with 4.3.3 at, respectively, two peaks and two troughs of the corrugation. In all cases, the thickness at the position of the indented marking shall comply

48、with the minimum requirement specified in the relevant standard. If the sheath carries an indented marking, this shall not be included in the measurements made for the calculation of mean thickness. The readings shall be made in millimetres to two decimal places. 4.5 Evaluation of the measurement re

49、sults The results shall be evaluated as specified in the test requirements of the relevant cable standard. 5 Test report The test report shall be in accordance with that given in IEC 60811-100. BS EN 60811-202:201260811-202 IEC:2012 9 Key tmminimum thickness Figure 1 Measurement of sheath thickness (circular inner profile) Key tmminimum thickness Figure 2 Measurement of sheath thickness (irregular circular inner profile) IEC 245/12 IEC 251/12 BS EN 60811-202:2012 10 60811