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1、BRITISH STANDARD BS EN 60811-1-4:1995 IEC 60811-1-4: 1985 Incorporating Amendment No. 1 and Corrigendum No. 1 Insulating and sheathing materials of electric cables Common test methods Part 1-4: General application Tests at low temperature The European Standard EN 60811-1-4:1995, with the incorporati
2、on of amendment A2:2001, has the status of a British Standard ICS 29.035.01 ? BS EN 60811-1-4:1995 This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 December 1995
3、BSI 13 August 2002 The following BSI references relate to the work on this standard: Committee reference GEL/20 Announced in BSI News, July 1995 ISBN 0 580 25001 6 Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee GEL/20, E
4、lectric cables, to Subcommittee GEL/20/3, Insulation and sheath, upon which the following bodies were represented: Association of Consulting Engineers British Approvals Service for Cables British Cable Makers Confederation British Plastics Federation British Railways Board British Rubber Manufacture
5、rs Association Ltd. British Telecommunications plc Department of Trade and Industry (Consumer Safety Unit, CA Division) Electricity Association ERA Technology Ltd. GAMBICA (BEAMA Ltd.) Institution of Incorporated Executive Engineers London Underground Ltd. Ministry of Defence Queen Mary and Westfiel
6、d College Telecommunications Cables Group of BCMC Warrington Fire Research Centre Amendments issued since publication Amd. No. DateComments 1362517 July 2002See national foreword 14025 Corrigendum No. 1 13 August 2002Correction to BS and EN titles BS EN 60811-1-4:1995 BSI 13 August 2002 i Contents P
7、age Committees responsibleInside front cover National forewordii Foreword2 Text of EN 60811-1-43 BS EN 60811-1-4:1995 ii BSI 13 August 2002 National foreword This Section of BS EN 60811 has been prepared by Technical Committee GEL/20 and is the English language version of EN 60811-1-4:1995 Insulatin
8、g and sheathing materials of electric cables Common test methods Part 1-4: General application Tests at low temperature, including amendment A2:2001, published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC 60811-1-4:1985, including Corrigendum May
9、 1986, amendment 1:1993 and amendment 2:2001, published by the International Electrotechnical Commission (IEC). This standard supersedes BS 6469-1.4:1992, which is withdrawn. The start and finish of text introduced or altered by amendment is indicated in the text by tags ?. Tags indicating changes t
10、o IEC text carry the number of the IEC amendment. For example, text altered by IEC amendments is indicated by ?. From 1 January 1997, all IEC publications have the number 60000 added to the old number. For instance, IEC 27-1 has been renumbered as IEC 60027-1. Cross-references The British Standards
11、which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publ
12、ication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cov
13、er, pages i and ii, pages 1 to 14, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60811-1-4 April 1995 + A2 October 2001 ICS 20.060.20Supersedes HD 505.1.4 S1
14、:1988 Descriptors: Electric cable, insulated cable, electrical insulation, sheath, test at low temperature English version Insulating and sheathing materials of electric cables Common test methods Part 1-4: General application Tests at low temperature (includes amendment A2:2001) (IEC 60811-1-4:1985
15、 + corrigendum May 1986 + A1:1993 + A2:2001) Matriaux disolation et de gainage des cbles lectriques Mthodes dessais communes Partie 1-4: Application gnrale Essais basse temprature (inclut lamendement A2:2001) (CEI 60811-1-4:1985 + corrigendum mai 1986 + A1:1993 + A2:2001) Isolier- und Mantelwerkstof
16、fe fr Kabel und isolierte Leitungen Allgemeine Prfverfahren Teil 1-4: Allgemeine Anwendung Prfungen bei neidriger Temperatur (enthlt nderung A2:2001) (IEC 60811-1-4:1985 + Corrigendum Mai 1986 + A1:1993 + A2:2001) This European Standard was approved by CENELEC on 1995-03-06. Amendment A2 was approve
17、d by CENELEC on 2001-09-01. 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 concerning such nationa
18、l standards may be obtained on application to the Central Secretariat 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 a
19、nd notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzer
20、land and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1995 Copyright reserved to CENELEC members Ref. No. EN 60
21、811-1-4:1995 + A2:2001 E EN 60811-1-4:1995 BSI 13 August 20022 Foreword The text of the International Standard IEC 811-1-4:1985, with its corrigendum May 1986 and its amendment 1:1993, prepared by IEC TC 20, Electric cables, was submitted to the Unique Acceptance Procedure and was approved by CENELE
22、C as EN 60811-1-4 on 1995-03-06 without any modification. This European Standard supersedes HD 505.1.4 S1:1988. Where reference is made to HD 505.1.4 S1:1988 in another standard, users should refer to this EN 60811-1-4 for the current information. The following dates were fixed: Annexes designated “
23、normative” are part of the body of the standard. Annexes designated “informative” are given for information only. In this standard, Annex ZA is normative and Annex A is informative. Annex ZA has been added by CENELEC. Foreword to amendment A2 The text of document 20/468/FDIS, future amendment 2 to I
24、EC 60811-1-4:1985, prepared by IEC TC 20, Electric cables, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as amendment A2 to EN 60811-1-4:1985 on 2001-09-01. The following dates were fixed: Contents Page Foreword2 1Scope3 2Test values3 3Applicability3 4Type tests and othe
25、r tests3 5Pre-conditioning3 6Test temperature3 7Median value3 8Tests at low temperature3 8.1Bending test at low temperature for insulations3 8.2Bending test at low temperature for sheaths4 8.3Elongation test at low temperature for insulations5 8.4Elongation test at low temperature for sheaths6 8.5Im
26、pact test at low temperature for PVC insulations and sheaths7 Appendix A Corresponding clauses and sub-clauses in IEC Publications 60538 and 60540 and IEC Publication 6081112 Annex ZA (normative) Normative references to international publications with their corresponding relevant European publicatio
27、ns14 Figure 1 Cold bend test apparatus9 Figure 2 Impact test apparatus10 Figure 3 Dumb-bell test piece11 Figure 4 Small dumb-bell test piece11 latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement(dop) 1996-03-01 latest
28、 date by which the national standards conflicting with the EN have to be withdrawn(dow) 1996-12-01 latest date by which the amendment has to be implemented at national level by publication of an identical national standard or by endorsement(dop) 2002-06-01 latest date by which the national standards
29、 conflicting with the amendment have to be withdrawn(dow) 2004-09-01 EN 60811-1-4:1995 BSI 13 August 2002 3 1 Scope ?This standard specifies the test method to be used for testing polymeric insulating and sheathing materials of electric cables for power distribution and telecommunications including
30、cables used on ships and in offshore applications.? This Section 4 of Part 1 gives the methods for tests at low temperature which apply to PVC and PE compounds. 2 Test values Full test conditions (such as temperatures, durations, etc.) and full test requirements are not specified in this standard; i
31、t is intended that they should be specified by the standard dealing with the relevant type of cable. Any test requirements which are given in this standard may be modified by the relevant cable standard to suit the needs of a particular type of cable. 3 Applicability Conditioning values and testing
32、parameters are specified for the most common types of insulating and sheathing compounds and of cables, wire and cords. 4 Type tests and other tests The test methods described in this standard are intended, in the first instance, to be used for type tests. In certain tests, where there are essential
33、 differences between the conditions for type tests and those for more frequent tests, such as routine tests, these differences are indicated. 5 Pre-conditioning All the tests shall be carried out not less than 16 h after the extrusion or vulcanization (or cross-linking), if any, of the insulating or
34、 sheathing compounds. 6 Test temperature Tests shall be carried out at the temperature specified in the relevant cable standard. 7 Median value When several test results have been obtained and ordered in an increasing or decreasing succession, the median value is the middle value if the number of av
35、ailable values is odd, and is the mean of the two middle values if the number is even. 8 Tests at low temperature 8.1 Bending test at low temperature for insulations 8.1.1 General This test is intended in general for cores of circular cross-section having an external diameter up to and including 12.
36、5 mm and for sector-shaped cores when it is not possible to prepare dumb-bells. If required by the standard for the type of cable, the test shall be carried out on larger cores. Otherwise, the insulation of larger cores shall be subjected to the elongation test described in Sub-clause 8.3. 8.1.2 Sam
37、pling and preparation of test pieces Each core to be tested shall be represented by two samples of suitable length. After removal of the coverings, if any, the samples shall be used as test pieces. 8.1.3 Apparatus The apparatus recommended for this test is represented in Figure 1, page 20, with expl
38、anations. It consists essentially of one revolving mandrel and guiding devices for the test pieces. Other single-mandrel apparatus, substantially equivalent to the one represented in Figure 1, may also be used. ?The apparatus shall be held in a suitable low temperature cabinet before and during the
39、test.? EN 60811-1-4:1995 4 BSI 13 August 2002 8.1.4 Procedure The test piece shall be fixed in the apparatus, as shown in Figure 1. ?The apparatus with the test piece in position shall be maintained in the suitable low temperature cabinet at the specified temperature for a period of not less than 16
40、 h. The cooling period of 16 h includes the time necessary for cooling down the apparatus.? If the apparatus has been pre-cooled, a shorter cooling period is permissible, but not less than 4 h provided that the samples have attained the prescribed test temperature. If the apparatus and test specimen
41、s have been pre-cooled, a cooling time of 1 h after each test piece has been fixed to the apparatus is sufficient. At the end of the prescribed time, the mandrel shall be rotated, complying with the conditions specified in Sub-clause 8.1.5, the test piece being guided so that it is bent tautly round
42、 the mandrel in a close helix. In the case of sector-shaped test pieces, the circular “back” part of the test piece shall be in contact with the mandrel. Afterwards, the test piece, still on the mandrel, shall be allowed to attain approximately ambient temperature. 8.1.5 Test conditions The cooling
43、and test temperature shall be as specified for the type of compound in the relevant standard for the type of cable. The diameter of the mandrel shall be between 4 and 5 times the diameter of the test piece (see below). The mandrel shall be uniformly rotated at a rate of one revolution in about 5 s a
44、nd the number of turns shall be as specified in the following table: The actual diameter of each test piece shall be measured by either a vernier calliper or a measuring tape. For sector-shaped test pieces, the minor axis is taken as the parameter equivalent to the diameter for determining the mandr
45、el diameter and the number of turns. For flat cords, the mandrel diameter shall be based on the minor axis dimension of the test piece, which is wound on with its minor axis perpendicular to the mandrel. 8.1.6 Evaluation of results At the end of the procedure described in Sub-clause 8.1.4, the test
46、pieces shall be examined while still on the mandrel. The insulation of both test pieces shall not show any crack when examined with normal or corrected vision without magnification. 8.2 Bending test at low temperature for sheaths 8.2.1 General This test is intended in general for cables with an over
47、all diameter up to and including 12.5 mm, or, for flat cables, a major axis dimension up to and including 20 mm. If required by the standard for the type of cable, the test shall also be carried out on larger cables. Otherwise, the sheath of larger cables shall be subjected to the elongation test de
48、scribed in Sub-clause 8.4. 8.2.2 Sampling and preparation of test pieces For each sheath to be tested, two pieces of cable of suitable length shall be taken. Before starting the test, any covering shall be removed from the sheath. Overall diameter (d) of the test pieceNumber of turns (mm) d ? 2.510
49、2.5 d ? 4.56 4.5 d ? 6.54 6.5 d ? 8.53 8.5 d2 EN 60811-1-4:1995 BSI 13 August 2002 5 8.2.3 Apparatus, procedure and test conditions In accordance with Sub-clauses 8.1.3, 8.1.4 and 8.1.5. For cables having an armour or a concentric conductor under the outer sheath, the diameter of the mandrel shall be as specified in the cable standard for the type of cable. 8.2.4 Evaluation of results At the end of the procedure described in Sub