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1、BRITISH STANDARD BS EN 60811-3-2:1995 IEC 811-3-2:1985 Incorporating Corrigendum: 1986 and Amendment No. 1:1993 and Amendment No. 2:2004 Insulating and sheathing materials of electric cables Common test methods Part 3: Methods specific to PVC compounds Section 2: Loss of mass test Thermal stability
2、test The European Standard EN 60811-3-2:1995, with the incorporation of Amendment A2:2004, has the status of a British Standard ICS 29.060.20 ? BS EN 60811-3-2:1995 This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority
3、 of the Standards Board and comes into effect on 15 December 1995 BSI 12 May 2004 The following BSI references relate to the work on this standard: Committee reference GEL/20/3 Announced in BSI News, July 1995 ISBN 0 580 25005 9 Committees responsible for this British Standard The preparation of thi
4、s British Standard was entrusted by Technical Committee GEL/20, Electric 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 Plast
5、ics Federation British Railways Board British Rubber Manufacturers 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 Lon
6、don Underground Ltd. Ministry of Defence Queen Mary and Westfield College Telecommunications Cables Group of BCMC Warrington Fire Research Centre Amendments issued since publication Amd. No.DateComments 1514212 May 2004Corrections to Clause 1 and Subclauses 9.1 and 9.2 BS EN 60811-3-2:1995 BSI 12 Ma
7、y 2004 i Contents Page Committees responsibleInside front cover National forewordii Foreword2 Text of EN 60811-3-23 List of referencesInside back cover BS EN 60811-3-2:1995 ii BSI 12 May 2004 National foreword This Section of BS EN 60811 has been prepared by Subcommittee GEL/20/3 and is the English
8、language version of EN 60811-3-2:1995, with the incorporation of Amendment 2:2004, Insulating and sheathing materials of electric cables Common test methods Part 3: Methods specific to PVC compounds Section 2: Loss of mass test Thermal stability test, published by the European Committee for Electrot
9、echnical Standardization (CENELEC). It is identical with IEC 811-3-2:1985, including Corrigendum May 1986 and Amendment 1:1993, published by the International Electrotechnical Commission (IEC). 1) The start and finish of text introduced or altered by amendment is indicated in the text by tags !“. Ta
10、gs indicating changes to CEN text carry the number of the CEN amendment. For example, text altered by CEN amendment A1 is indicated by !“. This standard supersedes BS 6469-3.2:1992, which is withdrawn. This publication does not purport to include all the necessary provisions of a contract. Users are
11、 responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. 1) Cross-references Publication referred to Corresponding British Standard BS EN 60811 Insulating and sheathing materials of electric cables Common test methods Par
12、t 1: General application EN 60811-1-1:1995 (IEC 811-1-1:1993)1) Section 1:1995 Measurements of thickness and overall dimensions Tests for determining the mechanical properties EN 60811-1-2:1995 (IEC 811-1-2:1985) Section 2:1995 Thermal ageing methods BS 3473 Chemical resistance of glass used in the
13、production of laboratory glassware ISO 695:1991Part 1:1991 Method for determination of resistance of glass to attack by a boiling aqueous solution of mixed alkali ISO 719:1985Part 2:1987 Method for determination of hydrolytic resistance of glass grains at 98 C ISO 1776:1985Part 5:1987 Method for det
14、ermination of resistance of glass to attack by 6 mol/L hydrochloric acid at 100 C 1) IEC 811-1-1:1985 has been superseded by IEC 811-1-1:1993. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 13 and a back cover. The BSI cop
15、yright notice displayed in this document indicates when the document was last issued. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60811-3-2 April 1995 + A2 March 2004 ICS 29.060.20Supersedes HD 505.3.2 S1:1988 Descriptors: Electric cable, insulated cable, electrical insulation, sheath, test
16、, loss of mass by heating, thermal stability English version Insulating and sheathing materials of electric cables Common test methods Part 3: Methods specific to PVC compounds Section 2: Loss of mass test Thermal stability test (IEC 60811-3-2:1985 + corrigendum May 1986 + A1:1993 + A2:2003) Matriau
17、x disolation et de gainage des cbles lectriques Mthodes dessais communes Partie 3: Mthodes spcifiques pour les mlanges PVC Section 2: Essai de perte de masse Essai de stabilit thermique (CEI 60811-3-2:1985 + corrigendum mai 1986 + A1:1993 + A2:2003) Isolier- und Mantelwerkstofe fr Kabel und isoliert
18、e Leitungen Allgemeine Prfverfahren Teil 3: Methoden fr PVC-Compounds Hauptabschnitt 2: Prfung des Masseverlustes Prfung der thermischen Stabilitt (IEC 60811-3-2:1985 + Corrigendum Mai 1986 + A1:1993 + A2:2003) This European Standard was approved by CENELEC on 1995-03-06; amendment A2 was approved b
19、y CENELEC on 2004-03-01. 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 national s
20、tandards 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 and
21、notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembo
22、urg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat:
23、rue de Stassart 35, B-1050 Brussels 1995 Copyright reserved to CENELEC members Ref. No. EN 60811-3-2:1995 + A2:2004 E EN 60811-3-2:1995 BSI 12 May 2004 2 Foreword The text of the International Standard IEC 811-3-2:1985, with its corrigendum May 1986 and its amendment 1:1993, prepared by IEC TC 20, E
24、lectric cables, was submitted to the Unique Acceptance Procedure and was approved by CENELEC as EN 60811-3-2 on 1995-03-06 without any modification. This European Standard supersedes HD 505.3.2 S1:1988. Where reference is made to HD 505.3.2 S1:1988 in another standard, users should refer to this EN
25、60811-3-2 for the current information. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. Appendices and annexes designated “informative” are given for information only. In this standard, Annex ZA is normative and Appendix A is informative. Annex ZA
26、has been added by CENELEC. Foreword to amendment A2 The text of the document 20/649/FDIS, future amendment 2 to IEC 60811-3-2:1985, 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 60811-3-2:1995 on 2004-03-01. T
27、he following dates were fixed: Endorsement notice The text of amendment 2:2003 to the International Standard IEC 60811-3-2:1985 was approved by CENELEC as an amendment to the European Standard without any modification. Contents Page Foreword2 1Scope3 2Test values3 3Applicability3 4Type tests and oth
28、er tests3 5Pre-conditioning3 6Test temperature3 7Median value3 8Loss of mass test for insulations and sheaths3 8.1Loss of mass test for insulation3 8.2Loss of mass test for sheaths5 9Thermal stability test for insulations and sheaths6 9.1Test equipment6 9.2Test procedure6 9.3Evaluation of results7 A
29、ppendix A Corresponding clauses and subclauses in IEC Publications 538 and 540 and IEC Publication 8119 Annex ZA (normative) Normative references to international publications with their corresponding European publications11 latest date by which the EN has to be implemented at national level by publ
30、ication of an identical national standard or by endorsement(dop) 1996-03-01 latest 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 stan
31、dard or by endorsement(dop) 2004-12-01 latest date by which the national standards conflicting with the amendment have to be withdrawn(dow) 2007-03-01 EN 60811-3-2:1995 BSI 12 May 2004 3 1 Scope #This standard specifies the test methods to be used for testing polymeric insulating and sheathing mater
32、ials of electric and optical cables for power distribution and telecommunications, including cables used in ships and in offshore applications.$ This Section Two of Part 3 gives the methods for loss of mass test and thermal stability test, which apply to PVC compounds. 2 Test values Full test condit
33、ions (such as temperatures, durations, etc.) and full test requirements are not specified in this standard; it 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 cab
34、le standard to suit the needs of a particular type of cable. 3 Applicability Conditioning values and testing parameters are specified for the most common types of insulating and sheathing compounds, and of cables, wires and cords. 4 Type tests and other tests The test methods described in this stand
35、ard are intended, in the first instance, to be used for type tests. In certain tests, where there are essential 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 carri
36、ed out not less than 16 h after the extrusion of the insulating or sheathing compounds. 6 Test temperature Unless otherwise specified, tests shall be made at ambient temperature. 7 Median value When several test results have been obtained and ordered in an increasing or decreasing succession, the me
37、dian value is the middle value if the number of available values is odd, and is the mean of the two middle values if the number is even. 8 Loss of mass test for insulations and sheaths 8.1 Loss of mass test for insulation 8.1.1 Test equipment a) An oven with natural air flow or air flow by pressure.
38、 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 less than 8 and not more than 20 complete air changes per hour at the specified ageing temperature. In case of dispute, an oven with natural air
39、circulation shall be used. A rotating fan shall not be used inside the oven. b) An analytical balance with a sensitivity of 0.1 mg. EN 60811-3-2:1995 4 BSI 12 May 2004 c) Punching dies for dumb-bell test pieces (see test method in Clause 9 of IEC Publication 811-1-1: Common Test Methods for Insulati
40、ng and Sheathing Materials of Electric Cables, Part 1: Methods for General Application, Section 1 Measurement of Thickness and Overall Dimensions. Tests for Determining the Mechanical Properties). d) A desiccator with silica gel or similar material. 8.1.2 Sampling If the loss of mass test is combine
41、d (see Item c) of subclause 8.1.1 of IEC Publication 811-1-2-2: Thermal Ageing Methods) with the mechanical test (Clause 9 of IEC Publication 811-1-1), the test pieces shall be three of those subjected to the ageing in the air oven specified in subclause 8.1.3 of Publication 811-1-2, one from each s
42、ample of core. Alternatively, three of the other test pieces prepared from each core in accordance with Clause 9 of Publication 811-1-1 may be used, if they are not required for other purposes and if their thickness complies with Item c) of subclause 8.1.3 below. Otherwise, three samples, each about
43、 100 mm long, of each core or the insulation from each core to be tested shall be taken, and a test piece prepared from each one in the same way as specified in subclause 8.1.3 below. 8.1.3 Preparation of test pieces a) Any coverings shall be removed. The conductor shall be removed and semiconductin
44、g layers on the insulation, if any, shall be removed mechanically, i.e. without using solvent. b) The test shall be made on: 1) Dumb-bell test pieces illustrated in Figure 1, page 16, whenever practicable. 2) Dumb-bell test pieces illustrated in Figure 2, page 16, if the core dimensions are too smal
45、l to permit dumb-bells according to Figure 1 to be used. 3) Tubular test pieces, as an alternative to dumb-bells, for inner diameters not exceeding 12.5 mm, provided that there is not an adherent semiconducting layer on the inside of the insulation and that any remaining separator shall be removed i
46、n a suitable way but without using solvent. The ends of tubular test pieces shall not be closed. c) Dumb-bell test pieces shall be prepared as specified in Item a) of subclause 9.1.3 of IEC Publication 811-1-1, except that the test pieces shall have two parallel surfaces over the whole length, their
47、 thickness shall be 1.0 0.2 mm, and marker lines are not required. Tubular test pieces shall be prepared as specified in Item b) of subclause 9.1.3 of IEC Publication 811-1-1, without applying marker lines. The total surface area of each test piece (see Item a) of subclause 8.1.4) shall be not less
48、than 5 cm2. d) Flat twin flexible cords provided with a groove on both sides between the cores shall be tested without separation of the cores. For calculation of its surface of evaporation, the twin cord may be considered as being two separated tubular pieces. 8.1.4 Calculation of the evaporation area A The surface area A, in square centimetres, of each test piece shall be determined before conducting the loss of mass test using the following formulae: a) For tubular specimens Surface A = outer surface + inner surface + cut surface A 2p Dd() ld+() 100 -