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1、AS 1222.21992 Australian Standard Steel conductors and stays Bare overhead Part 2: Aluminium clad (SC/AC) Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 22 Jan 2009 This Australian Standard was prepared by Committee EL/10, Overhead Lines. It was approved on behalf of the Council of Standards Australia
2、 on 21 July 1992 and published on 12 October 1992. The following interests are represented on Committee EL/10: Australian Electrical and Electronic Manufacturers Association Australian Porcelain Insulators Association Confederation of Australian Industry Electricity Supply Association of Australia R
3、ailways of Australia Committee Review of Australian Standards. To keep abreast of progress in industry, Australian Standards are subject to periodic review and are kept up to date by the issue of amendments or new editions as necessary. It is important therefore that Standards users ensure that they
4、 are in possession of the latest edition, and any amendments thereto. Full details of all Australian Standards and related publications will be found in the Standards Australia Catalogue of Publications; this information is supplemented each month by the magazine The Australian Standard, which subsc
5、ribing members receive, and which gives details of new publications, new editions and amendments, and of withdrawn Standards. Suggestions for improvements to Australian Standards, addressed to the head office of Standards Australia, are welcomed. Notificationof any inaccuracy or ambiguity found in a
6、n Australian Standard should be made without delay in order that the matter may be investigated and appropriate action taken. This Standard was issued in draft form for comment as DR 91133. Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 22 Jan 2009 AS 1222.21992 Australian Standard Steel conductors an
7、d stays Bare overhead Part 2: Aluminium clad (SC/AC) First published as AS 1222.2 1973. Second edition 1992. PUBLISHED BY STANDARDS AUSTRALIA (STANDARDS ASSOCIATION OF AUSTRALIA) 1 THE CRESCENT, HOMEBUSH, NSW 2140 ISBN 0 7262 7727 4 Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 22 Jan 2009 AS 1222.21
8、9922 PREFACE This Standard was prepared by the Standards Australia Committee on Overhead Lines to supersede AS 1222.2 1973, Steel conductors and stays for overhead power transmission purposes, Part 2: Aluminium clad (SC/AC), and it is the second part of a two-part series, viz. AS 1222 Steel conducto
9、rs and staysBare overhead Part 1:Galvanized (SC/GZ) Part 2:Aluminium clad (SC/AC) The Standard conformsgenerallywith variousInternationalElectrotechnicalCommission (IEC) publications on overhead conductors and with IEC draft, document 7 (Central Office) 434. In determining conductor sizes, a range o
10、f wire sizes has been provided similar to that for conductors specified in the 1973 edition. Conductors with other dimensions can also be supplied by reference to this Standard. Wire sizes have not been changed from the previous edition but major modifications have been made in the following areas:
11、(a)The provisions allowing joining of finished wires has been eliminated. (b)The sampling rate of specimens for routine tests relies on a quality assurance plan. (c)A new Appendix B covers the coefficient of linear expansion and the theoretical basis for the calculation of modulus of elasticity. (d)
12、A new Appendix C has been included which highlights items to be specified by the purchaser or agreed between purchaser and manufacturer at the time of order. CopyrightSTANDARDS AUSTRALIA Users of Standards are reminded that copyright subsists in all Standards Australia publications and software. Exc
13、ept where the Copyright Act allows and except where provided for below no publications or software produced by Standards Australia may be reproduced, stored in a retrieval system in any form or transmitted by any means without prior permission in writing from Standards Australia. Permission may be c
14、onditional on an appropriate royalty payment. Requests for permission and information on commercial software royalties should be directed to the head office of Standards Australia. Standards Australia will permit up to 10 percent of the technical content pages of a Standard to be copied for use excl
15、usively in-house by purchasers of the Standard without payment of a royalty or advice to Standards Australia. Standards Australia will also permit the inclusion of its copyright material in computer software programs for no royalty payment provided such programs are used exclusively in-house by the
16、creators of the programs. Care should be taken to ensure that material used is from the current edition of the Standard and that it is updated whenever the Standard is amended or revised. The number and date of the Standard should therefore be clearly identified. The use of material in print form or
17、 in computer software programs to be used commercially, with or without payment, or in commercial contracts is subject to the payment of a royalty. This policy may be varied by Standards Australia at any time. Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 22 Jan 2009 3AS 1222.21992 CONTENTS Page SECT
18、ION 1 SCOPE AND GENERAL 1.1SCOPE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 1.2REFERENCED DOCUMENTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 1.3DEFINITIONS. . . . . . . . . . . . . . . .
19、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 1.4NOMENCLATURE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 SECTION 2 MATERIAL REQUIREMENTS AND WIRE PROPERTIES 2.1GENERAL . . . . . . . . . . . . . . . . . . . . . . . .
20、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 2.2MATERIALS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 2.3WIRE PROPERTIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21、. .6 SECTION 3 CONDUCTOR REQUIREMENTS 3.1GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 3.2JOINTS IN FINISHED WIRES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 3.3LAY. . . . . . . . . . .
22、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 3.4STANDARD SIZES AND CALCULATED PROPERTIES OF CONDUCTORS. . . . . . . .8 SECTION 4 TESTS 4.1SELECTION OF TEST SPECIMENS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 4.2MECH
23、ANICAL TESTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 4.3COATING THICKNESS TEST. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 4.4RESISTIVITY TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
24、. . . . . . . . . . . . . . .11 4.5LAY RATIO. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 4.6PLACE OF TESTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 SECTION 5 PACKING AND MARKING 5.
25、1PACKING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 5.2MARKING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 5.3COIL MARKING. . . . . . . . . . . . . . . . . . . . . . .
26、 . . . . . . . . . . . . . . . . . . . . . . . . . . .12 5.4CERTIFICATE OF COMPLIANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 APPENDICES ACALCULATION OF CONDUCTOR PROPERTIES. . . . . . . . . . . . . . . . . . . . . . . . . .13 BCOEFFICIENT OF LINEAR EXPANSION AND C
27、ALCULATION OF MODULUS OF ELASTICITY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14 CPURCHASING GUIDELINES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 22 Jan 2009
28、AS 1222.219924 STANDARDS AUSTRALIA Australian Standard Steel conductors and staysBare overhead Part 2: Aluminium clad (SC/AC) SECTION 1 SCOPE AND GENERAL 1.1 SCOPE This Standard specifies requirements and tests for bare electrical conductors for overhead power transmission purposes, constructed from
29、 aluminium-clad steel wires, having a minimum aluminium radial thickness of 5% of the nominal diameter of the wire. This corresponds to IEC class 20SA type A of aluminium-clad steel wires. For the purpose of this Standard, the term conductor includes stays. NOTES: 1Appendix A gives methods to calcul
30、ate conductor properties. 2Appendix B gives the coefficient of linear expansion and the theoretical basis for the calculation of modulus of elasticity. 3Appendix C lists information which should be supplied with enquiries and orders for conductors. 1.2 REFERENCED DOCUMENTS The following documents ar
31、e referred to in this Standard: AS 1057Quality assurance and quality control Glossary of terms 1391Methods of tensile testing of metals 1442Carbon steels and carbon-manganese steels Hot-rolled bars and semi-finished products 2505Methods for bend and related testing of metals 2505.5Part 5: Torsion an
32、d wrapping tests on wire 2848Aluminium and aluminium alloysCompositions and designations 2848.1Part 1: Wrought products 2857Timber drums for insulated electric cables and bare conductors 3983Metal drums for insulated electric cables and bare conductors IEC 468Methods of measurement of resistivity of
33、 metallic materials ASTM D566Test method for dropping point of lubricating grease 1.3 DEFINITIONS For the purpose of this Standard, the definitions given in AS 1057 and those below apply. 1.3.1 Wirea filament of drawn metal having a constant circular cross section. 1.3.2 King wirea central wire of a
34、 conductor having a nominal diameter larger than that of the surrounding wires. 1.3.3 Conductora finished circular stranded assembly consisting of three or more wires laid up together. 1.3.4 Diameterthe mean of two measurements at right angles taken at any one cross-section. 1.3.5 Direction of layth
35、e direction of lay is defined as right-hand or left-hand, as follows: (a)Right-hand laywhen the slope of the wires is in the direction of the central part of the letter Z when the conductor is held vertically. (b) Left-hand laywhen the slope of the wires is in the direction of the central part of th
36、e letter S when the conductor is held vertically. 1.3.6 Lay lengththe axial length of one complete turn of the helix formed by an individual wire in a stranded conductor. 1.3.7 Lay ratiothe ratio of the lay length to the nominal external diameter of the corresponding layer of wires in the stranded c
37、onductor. 1.3.8 Breaking load of a wirethe maximum load obtained in a tensile test of wire. 1.3.9 Ultimate tensile stressthe breaking load divided by the original cross-sectional area ofthe test wire. COPYRIGHT Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 22 Jan 2009 5AS 1222.21992 1.3.10 Non-grease
38、d conductora conductor which is dry and free from grease, other than a residue of a manufacturing lubricant which may be on the wires. 1.3.11 Fully greased conductora conductor in which grease is applied to all wires with the exception of the outermost layer. 1.3.12 Surface fracturea crack on the su
39、rface of a wire visible to an observer with normal or corrected vision. 1.3.13 Spoola container of wire which is to be installed on a stranding machine to manufacture the conductor. 1.3.14 Statistical controlwhere variation in the output of a process is random and is an inherent part of the system.
40、This condition implies an absence of special causes of variation. 1.3.15 Process capabilitythe limits of inherent variability within which a process operates as governed by the prevailing circumstances. NOTE: In practice this variability is normally taken to be six standard deviations. 1.4 NOMENCLAT
41、URE Aluminium-clad steel conductors covered by this Standard shall have the code SC/AC. COPYRIGHT Accessed by UNIVERSITY OF SOUTH AUSTRALIA on 22 Jan 2009 AS 1222.219926 SECTION 2 MATERIAL REQUIREMENTS AND WIRE PROPERTIES 2.1 GENERAL The conductor shall be constructed of aluminium-clad steel wires h
42、aving the properties specified in this Standard. If specified, the conductor may contain grease for additional protection against corrosion. It is not intended that wires from a conductor purporting to comply with this Standard should be subjected to chemical analysis. 2.2 MATERIALS 2.2.1 General Th
43、e wire shall consist of a round steel core withaluminium cladding. Thealuminium shall conform to the composition requirements of alloy 1350 as specified in AS 2848.1. The cladding shall provide a uniform and continuous aluminium cladding as described in Clauses 2.2.2 and 2.2.3, and shall comply with
44、 the requirement of Clause 2.3. 2.2.2 Steel The base metal shall be fully-killed steel in accordance with AS 1442. 2.2.3 Aluminium The aluminium used for cladding shall have a minimum purity of 99.5% with impurities limited to (a)copper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
45、 . . . . . . .0.05% maximum; and (b) copper plus silicon plus iron . . . . . . . . . . . . . . . . . . . . . . . . 0.50% maximum. The coating shall comply with the relevant requirements of Clause 4.3. 2.2.4 Grease Grease, used for additional corrosion protection, shall have a dropping point of not l
46、ess than 120C determined in accordance with ASTM D566. 2.3 WIRE PROPERTIES 2.3.1 General Before stranding, all wires shall meet the dimensional tolerances of Table 2.1. For non-standard sizes, the wires shall have a minimum ultimate tensile stress corresponding to that of the next larger standard wi
47、re size as specified in Table 2.2. Joints may be made in the base steel rod and these may be retained in the final wire provided that, at the position of the joint, there shall be a minimum aluminium radial thickness of 5% of nominal diameter of the wire. The finished wire shall contain no joints ot
48、her than those made in the base steel rod. TABLE 2.1 TOLERANCE ON DIAMETER OF WIRES Nominal diameter mm Tolerance on measurements, with reference to nominal diameter Mean diameter Max. ovality (difference between max. and min. diameters at same cross section) % 2.751.53 2.3.2 Freedom from defects Th
49、e wires shall be smooth and free from all imperfections such as fissures, roughness, grooves, inclusions or other defects which may endanger the performance of the product. 2.3.3 Aluminium-clad steel wire 2.3.3.1 General The required properties and sizes of aluminium-clad steel wire are given in Table 2.2. Values adopted for the basic properties of wire for the purpose of this Standard are set out in Clauses 2.3.2.2 to 2.3.2.6. 2.3.3.2 Density The density of aluminium-clad steel wire at 20C is taken as 6.59 103kg/m3. 2.3.3.3 Resistivity The
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