SANS 182-5-2008 Conductors for overhead electrical transmission lines Part 5 Zinc-coated steel wires for conductors and stays《高架输电线用导线 第5部分 导线和支柱用镀锌钢线》.pdf

《SANS 182-5-2008 Conductors for overhead electrical transmission lines Part 5 Zinc-coated steel wires for conductors and stays《高架输电线用导线 第5部分 导线和支柱用镀锌钢线》.pdf》由会员分享，可在线阅读，更多相关《SANS 182-5-2008 Conductors for overhead electrical transmission lines Part 5 Zinc-coated steel wires for conductors and stays《高架输电线用导线 第5部分 导线和支柱用镀锌钢线》.pdf（22页珍藏版）》请在麦多课文档分享上搜索。

1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA

2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any

3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-21695-5 SANS 182-5:2008Edition 1.3 Any reference to SABS 182-5 is deemedto be a reference to this standard(Government Notice No. 1373 of 8

4、 November 2002)SOUTH AFRICAN NATIONAL STANDARD Conductors for overhead electrical transmission lines Part 5: Zinc-coated steel wires for conductors and stays Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.

5、sabs.co.za SABS SANS 182-5:2008 Edition 1.3 Table of changes Change No. Date Scope Amdt 1 1990 Amended to allow the use of galvanizing methods other than the hot-dip process. Amdt 2 2001 Amended to update referenced standards, to change the mark, and to change the definition of “acceptable“. Amdt 3

6、2008 Amended to change the designation of SABS standards to SANS standards, to delete reference to the standardization mark scheme and to update referenced standards. Acknowledgement The SABS Standards Division wishes to acknowledge the valuable assistance derived from publications of the British St

7、andards Institution. Foreword This South African standard was approved by National Committee SABS TC 66, Electric cables, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This document was published in September 2008. This document su

8、persedes SABS 182-5:2001 (edition 1.2). A vertical line in the margin shows where the text has been technically modified by amendment No. 3. Preface In this part of SANS 182 tests are not classified as type, sample, or routine tests. Compliance with the requirements of this part of SANS 182 may be a

9、ssessed by means of tests carried out on a sample, the sampling procedure and the test methods being those given in this part of SANS 182. During production control the manufacturer may use whatever tests he deems necessary for ensuring compliance with this part of SANS 182, but in cases of dispute

10、only the appropriate test methods may be used. The frequency of testing required and the test to be used in the administration of the standardization mark scheme are the subject of a separate agreement between the Council of the South African Bureau of Standards and the permit holder. Amdt 3 SANS 18

11、2-5:2008 Edition 1.3 1 Contents Page Acknowledgement Foreword Preface 1 Scope 3 2 Definitions . 3 3 Type and material 4 4 General constructional requirements . 5 5 Electrical and physical requirements 7 6 Packing and marking 8 7 Sampling and compliance with this part of the specification 9 8 Inspect

12、ion and methods of test 10 8.1 Inspection 10 8.2 Diameter of wire 10 8.3 Mass per kilometre of line-wire . 10 8.4 Resistance of line-wire and earth conductor . 10 8.5 Breaking strength tests . 10 8.6 Elongation at break tests . 11 8.7 Lapping test . 11 8.8 Twisting test (wires of grade 1 400 MPa) 12

13、 8.9 Zinc-coating tests 12 9 Constructional tables 12 Appendix A Applicable standards 16 Appendix B Notes to purchasers 16 Appendix C Standards for galvanized steel . 17 Appendix D Notes on the calculation of the mass of stranded conductors 18 Appendix E Resistance/temperature conversion factors for

14、 zinc-coated wires . 19 SANS 182-5:2008 Edition 1.3 2 This page is intentionally left blank SANS 182-5:2008 Edition 1.3 3 Conductors for overhead electrical transmission lines Part 5: Zinc-coated steel wires for conductors and stays 1 Scope 1.1 This part of the specification applies to uninsulated z

15、inc-coated steel wire used for the following purposes and, where relevant, in the forms indicated: a) line-wire for telecommunication purposes; b) wires for earth conductors (stranded or single); c) suspension wires (stranded or single); d) stay wires (stranded or single); e) binding and jointing wi

16、res. NOTE 1) The titles of standards referred to by number in this part of the specification are given in appendix A. 2) Requirements that must be specified by the purchaser are listed in B.1 of appendix B and a requirement that must be agreed upon between the purchaser and the manufacturer is given

17、 in B.2. 3) Assessment of compliance with the requirement of 3.2.1 and, in the case of stranded conductors, the relevant requirements of 4.2.1, 4.2.4(b), and (when so required) 5.3.3 by measurement, requires special agreement between the supplier and the purchaser. Amdt 3 2 Definitions 2.1 For the p

18、urposes of this part of the specification the following definitions shall apply: acceptable acceptable to the authority administering this part of the specification, or to the parties concluding the purchase contract, as relevant Amdt 2 coated wire steel wire of circular cross-section produced by co

19、ld drawing and subsequently zinc-coated Amdt 1 SANS 182-5:2008 Edition 1.3 4 defective a coil or reel of coated wire or a reel or drum of stranded conductor that fails in one or more respects to comply with the relevant requirements of the specification diameter of coated wire the mean of two measur

20、ements at right angles taken at the same cross-section NOTE The diameter is always measured over the zinc coating. direction of lay the lateral direction of inclination to the axis, either right hand or left hand, of the receding helix formed by a wire of a stranded conductor NOTE With right-hand la

21、y, the wires conform to the direction of the central part of the letter “Z“ when the conductor is held vertically. With left-hand lay, the wires conform to the direction of the central part of the letter “S“ when the conductor is held vertically. lay ratio the ratio of the axial length of a complete

22、 turn of the helix formed by an individual wire of a stranded conductor to the external diameter of the helix lot not more than 3 200 coils, reels, or drums of zinc-coated steel wire of the same type and, when relevant, grade, stranded or single (as relevant), and of the same standard diameter or of

23、 the same reference area (as relevant), from one manufacturer, submitted at any one time for inspection and testing reference area the cross-sectional area used for designation and purchasing purposes standard diameter of wire the wire diameter on which the requirements for the mass, resistance (lin

24、e-wire only), and breaking strength of the wire are based stranded conductor a conductor made up of a number of coated wires of the same standard diameter laid concentrically 3 Type and material 3.1 Type Wire shall be of one of the following types and, in the cases of earth conductors, suspension wi

25、re, and stay wire, it shall be stranded or single, all as specified by the purchaser: a) line-wire for telecommunication purposes; b) earth conductors; c) suspension wire; d) stay wire; e) binding or jointing wire. SANS 182-5:2008 Edition 1.3 5 3.2 Material 3.2.1 Steel The steel from which wires are

26、 drawn shall have been made by any process in which the final stage is other than the Bessemer process. 3.2.2 Joints Welded joints are permitted in rods and wires before the final drawing of the wire (see also 4.1.3 and 4.2.4). 3.2.3 Zinc-coating The steel wires shall have been individually coated a

27、fter final drawing, and the coatings shall comply with the relevant requirements of SANS 10244-2 for class A (thick) coatings. Amdt 1; amdt 3 4 General constructional requirements 4.1 Wire 4.1.1 Freedom from defects The coated wire shall be smooth, uniform in quality, free from spills, splits, bare

28、spots, and other defects, and any departure from circularity of the cross-section shall not exceed 2 % of the mean diameter. 4.1.2 Diameter a) The diameter of a coated wire (other than a wire used for a stranded conductor), measured in accordance with 8.2, shall be within the limits given in columns

29、 2 and 3 of table B, or columns 2 and 3 of table D, or columns 2 and 3 of table F, relevant to the type and standard diameter specified by the purchaser. b) The diameter of a coated wire used for a stranded conductor, measured (before stranding) in accordance with 8.2, shall, subject to the appropri

30、ate tolerances given in table C, conform to the value given in column 2 of table E, appropriate to the reference area specified by the purchaser. 4.1.3 Joints Finished coated wire intended for use as a single wire (e.g. telecommunication line-wire or binding wire) shall contain no joint or weld. SAN

31、S 182-5:2008 Edition 1.3 6 4.2 Stranded conductors 4.2.1 General Coated wires used in the construction of a stranded conductor shall, before stranding, comply with the relevant requirements of 4.1. Stranding shall be such that a strand complies with the appropriate electrical and physical requiremen

32、ts specified in section 5. 4.2.2 Direction of lay Successive layers of a stranded conductor shall have opposite directions of lay and, unless otherwise specified by the purchaser, the outermost layer shall have a right-hand lay. 4.2.3 Lay ratio Unless otherwise specified by the purchaser, the lay ra

33、tio shall be within the limits 12 and 18. 4.2.4 Joints in wires of a stranded conductor a) There shall be no joint in the individual wires of a stranded conductor consisting of less than seven wires. b) Joints shall be permitted in individual wires of a conductor having seven or more wires provided

34、that 1) no two such joints are less than 15 m apart; 2) the joints are made by resistance butt welding or by other acceptable means; 3) the joints are protected from corrosion by recoating with zinc; and 4) the diameter of a strand is not increased materially by the presence of a joint. 4.2.5 Freedo

35、m from defects and from foreign matter Stranded conductors shall be free from dirt, grit, and other foreign matter, and shall have no broken wires. 4.2.6 Overall diameter The overall diameter of a stranded conductor shall not exceed the appropriate maximum value given in column 3 of table E. 4.2.7 R

36、eference area and grade of stranded earth conductor Stranded earth conductors shall have a reference area of 50 mm2or 90 mm2, as specified by the purchaser, and shall consist of wires of grade 500 MPa. 4.3 Length Unless a stranded conductor or coated wire of another length is specified by the purcha

37、ser and subject to the relevant requirements of 6.1, a stranded conductor or coated wire shall be supplied in the manufacturers usual production length. The actual length of the stranded conductor or coated wire on a drum, on a reel, or in a coil shall, subject to a tolerance of %, conform to this n

38、ominal length. This requirement does not apply if the purchaser orders in terms of mass. 30+SANS 182-5:2008 Edition 1.3 7 4.4 Corrosion protection When so specified by the purchaser, coils shall be dipped in oil or other acceptable compound that will provide protection against corrosion during trans

39、it and storage. 5 Electrical and physical requirements 5.1 Mass per kilometre of line-wire The mass per kilometre of a line-wire, determined in accordance with 8.3, shall conform to the values given in table B. 5.2 Resistance When determined and adjusted to a reference temperature of 20 C in accorda

40、nce with 8.4, a) the resistance of a line-wire shall not exceed the maximum value given in table B, and b) the resistance of an earth conductor shall not exceed 4,194 /km in the case of earth conductors of reference area 50 mm2and 2,392 /km in the case of earth conductors of reference area 90 mm2. 5

41、.3 Breaking strength 5.3.1 The breaking strength of a zinc-coated wire for use as a single wire and of a zinc-coated wire before stranding, determined in accordance with 8.5.1, shall be equal to at least the value given in table B, D or F (as relevant), appropriate to the standard wire diameter and,

42、 when relevant, the grade of wire specified by the purchaser. 5.3.2 The breaking strength of a zinc-coated wire after stranding, determined in accordance with 8.5.2, shall be equal to at least 95 % of the value given in table D appropriate to the standard diameter and grade of the wire. 5.3.3 The br

43、eaking strength of a stranded conductor, determined in accordance with 8.5.3 or (when relevant) 8.5.4, shall be equal to at least the value given in table E, appropriate to the reference area of the stranded conductor and the grade of the wire. 5.4 Elongation at break (wires of grades 400-1 100 MPa)

44、 The percentage elongation at break of a zinc-coated wire for use as a single wire and of a zinc-coated wire before stranding, determined in accordance with 8.6.1, shall be at least equal to the value given in column 2 of table A appropriate to the grade of the wire. 5.5 Ductility when lapped The du

45、ctility of a zinc-coated wire shall be such that, when the wire is tested in accordance with 8.7, the base metal shall not break or show any sign of cracking. 5.6 Ductility when twisted (wire of grade 1 400 MPa) When a zinc-coated wire of grade 1 400 MPa is tested in accordance with 8.8, it shall wi

46、thstand, without breaking, at least 23 twists in a gauge length of 100 times the standard diameter of the wire (or pro rata on a longer or shorter test length). SANS 182-5:2008 Edition 1.3 8 6 Packing and marking 6.1 Packing 6.1.1 In addition to any special packing requirements specified by the purc

47、haser, the material shall be packed as follows: a) Continuity. Unless otherwise acceptable, each continuous length of wire or stranded conductor shall be packed individually. b) Line-wire for telecommunication purposes. Line-wire for telecommunication purposes shall be packed in coils of inside diam

48、eter 480 - 530 mm and of mass 45 - 55 kg. The coils shall be securely bound with binders that have no deleterious or corrosive effect on the wire. c) Binding and jointing wires. Binding and jointing wires shall be packed in coils of inside diameter 230 - 255 mm that are securely bound with an accept

49、able string or with zinc-coated binding wire or with any other binder that has no deleterious or corrosive effect on the wire. Unless otherwise specified by the purchaser, the mass of each coil shall be between 5 kg and 20 kg. d) Earth conductors, suspension wire, and stay wire 1) Single wire. Earth conductors, suspension wire, and stay wire in the form of a single wire shall be packed in coils or on reels, as specified by the purchaser. 2) Stranded conductor. Unless otherwise specified by the purchaser, a stranded conductor shall be packed on a robust wooden drum or wooden