1、BRITISH STANDARD BS EN 61068-1:1997 IEC 61068-1: 1991 Specification for Polyester fibre woven tapes Part 1: Definitions, designation and general requirements The European Standard EN 61068-1:1997 has the status of a British Standard ICS 01.040.29; 29.035.20BSEN61068-1:1997 This British Standard, hav
2、ing been prepared under thedirectionof the Electrotechnical Sector Board,waspublished under theauthorityof the StandardsBoardand comes into effect on 15November1997 BSI 04-2000 ISBN 0 580 28495 6 National foreword This British Standard is the English language version of EN 61068-1:1997. It is identi
3、cal with IEC 61068-1:1991. It supersedes BS7809-1:1995which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee GEL/15, Insulating materials, to Subcommittee GEL/15/3, Material specifications, which has the responsibility to: aid enquirers to understand the tex
4、t; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this subcommi
5、ttee can be obtained on request to its secretary. From1January 1997, all IEC publications have the number60000added to the old number. For instance, IEC27-1has been renumbered as IEC 60027-1. For a period of time during the change over from one numbering system to the other, publications may contain
6、 identifiers from both systems. Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally include an annex which lists normative references to international publications with their corresponding European publications. The British Standards which implement these internat
7、ional or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions
8、 of a contract. Users of British Standards are responsible for their 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 cover, pages i and ii, theEN title page, pag
9、es 2 to 4 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSEN61068-1:1997 BSI 04-2000 i Contents Page Na
10、tional foreword Inside front cover Foreword 2 Text of EN 61068-1 3ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61068-1 August 1997 ICS 29.035.20 Descriptors: Electrical insulating materials, solid electrical insulating materials, tapes, weaving, polyester fibres, definitions, designa
11、tion, dimensions, marking English version Specification for polyester fibre woven tapes Part 1: Definitions, designation and general requirements (IEC 61068-1:1991) Spcification pour rubans tisss en fibres de polyester Partie 1: Dfinitions, dsignation et prescriptions gnrales (CEI 61068-1:1991) Best
12、immung fr gewebte Bnder aus Polyesterfilamenten Teil 1: Definitionen, Bezeichnung und allgemeine Anforderungen (IEC 61068-1:1991) This European Standard was approved by CENELEC on 1997-07-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions
13、 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 Central Secretariat or to any CENELEC member. This European Standard exists in three o
14、fficial 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 Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical c
15、ommittees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique
16、 Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1997 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61068-1:1997 EEN61068-1:1997 BSI 04-2000 2 Foreword The text of the Inte
17、rnational Standard IEC 61068-1:1991, prepared by SC 15C, Specifications, of IEC TC 15, Insulating materials, was submitted to the formal vote and was approved by CENELEC as EN61068-1on 1997-07-01 without any modification. The following dates were fixed: Endorsement notice The text of the Internation
18、al Standard IEC61068-1:1991was approved by CENELEC as a European Standard without any modification. Contents Page Foreword 2 1 Scope 3 2 Definitions 3 3 Designation 3 4 General requirements 3 Figure 1 View of roll from locking thread side 4 Table 1 Thickness 4 Table 2 Nominal width 4 latest date by
19、which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1998-06-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 1998-06-01EN61068-1:1997 BSI 04-2000 3 1 Scope This part of IEC1068s
20、pecifies requirements for tapes woven on shuttleless looms for continuous filament polyester fibres. Nominal thicknesses of0,13mm to0,25mm and nominal widths of15mm, 20 mm and25mm are covered. The standard combinations of nominal thickness and nominal width are specified and an additional designatio
21、n is included for tapes which, whilst complying with the majority of the requirements of this part, are supplied with non-standard widths. This part gives definitions, a designation and general requirements. Other parts of IEC 1068 are: Part 2: Methods of test. Part 3: Specifications for individual
22、materials. 2 Definitions For the purpose of this part, the following definitions apply: 2.1 pick weft thread or group of threads inserted in a fabric by one traverse of the picking mechanism between two consecutive beat-ups 2.2 end individual warp thread 2.3 filament a single, very long fibre 2.4 lo
23、cking thread independent thread used to lock the weft threads 2.5 shuttleless loom loom in which the weft is inserted by means other than a shuttle and is drawn from a stationary supply 2.6 plain weave simplest of all weave interlacing in which the odd warp threads pass over one and under one weft p
24、ick throughout the fabric with the even warp thread reversing this order to under one, over one 2.7 heat set yarn yarn which has been heat treated so that subsequent shrinkage is reduced 2.8 central value middle value of an odd number of test measurements or the means of the two middle values of an
25、even number of test measurements when these measurements are arranged in order of magnitude NOTEThe central value is also known as the median. 3 Designation Tapes shall be designated in two types as defined below: Type 1 Tapes woven from polyester yarn so as to produce a tape with high shrinkage. Ty
26、pe 2 Tapes woven with heat set polyester yarn so as to produce a tape with low shrinkage. 4 General requirements 4.1 Construction The yarns used shall be continuous filament polyethylene terephthalate (PETP) and for type2shall be heat set. The tapes shall be plain weave. The picks shall be interlock
27、ed at or near the selvedge opposite the one from which the weft is inserted thus preventing unravelling of the selvedge during use. If a locking thread is used, the method of interlacing shall be such that the thread cannot be pulled out of the body of the tape. Tapes shall be identified according t
28、o type as follows: Type 1 A single black warp thread-positioned so as to indicate the centre line of the tape. Type 2 A single black warp thread positioned so as to indicate the centre line of the tape with two orange threads well offset one on each side of the black thread. 4.2 Thickness The nomina
29、l thickness measured between the selvedges of a tape shall be one of the values as given in Table 1, and the thickness as determined by the method given in 2.3 of IEC1068-2shall not fall outside the limits given in Table 1. The thickness, when measured at the selvedges, shall not exceed the thicknes
30、s between the selvedges by more than0,03mm.EN61068-1:1997 4 BSI 04-2000 Table 1 Thickness 4.3 Width The nominal widths of tapes complying fully with the requirements of this part are given in Table 2. Table 2 Nominal width The width as determined in accordance with the method given in 3.4 of Part2sh
31、all not differ from that specified by more than 1,0mm. 4.4 Requirements for rolls The tapes shall be wound on a hard tubular core with sufficient tension to form a compact roll but without deforming the structure of the tape. The internal diameter of the core shall be not less than10mm and not more
32、than13mm and its width shall be approximately the same as the width of the tape but shall not exceed it. An alternative internal core having a diameter of55mm is also permitted. NOTEThe length of tape in a roll is not a requirement of this part but it is normally50m. For types1and2the tapes shall be
33、 wound in an anti-clockwise spiral when the roll is viewed from the locking thread as shown in Figure 1. The number of joins per roll shall not exceed two and none of the lengths in a roll shall be shorter than10m. In any consignment, not more than10% of rolls shall have any join. Where a join occur
34、s, the tape ends shall be butted and joined up by a strip of coloured gummed tape which shall show on the edge of the roll to indicate the presence of a join. Pins or other metal fasteners shall not be used for securing the ends of rolls or for joining the tape. 4.5 Marking In addition to the identi
35、fication of the type of tape as specified in 4.1 the following information shall legibly be marked on individually packed rolls or on packages or on both: a) number of this part of the standard; b) designation of the type as specified in clause 3; c) nominal thickness of the tape in 1/100ths of a mi
36、llimetre; d) width of the tape in millimetres; e) length of the roll in metres; f) in the case of a package, the number of rolls. Nominal Minimum Maximum mm mm mm 0,13 0,20 0,25 0,12 0,17 0,22 0,17 0,22 0,27 Type Nominal thickness Nominal width mm mm 1 2 2 2 0,13 0,13 0,20 0,25 15 25 15 20 25 15 20
37、25 15 25 Figure 1 View of roll from locking thread sideblankBS EN 61068-1:1997 IEC 61068-1: 1991 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and
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