1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationConductors for overhead lines Aluminium Conductors SteelSupported (ACSS)BS EN 50540:2010National forewordThis British Standard is the UK implementation of EN 50540:2010.The UK pa
2、rticipation in its preparation was entrusted to Technical CommitteeGEL/7, Overhead electrical conductors.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions of acontract. Users are
3、responsible for its correct application. BSI 2010ISBN 978 0 580 68886 7ICS 29.240.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of the StandardsPolicy and Strategy Committee on 31 May 2010.Amendments issued s
4、ince publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 50540:2010EUROPEAN STANDARD EN 50540 NORME EUROPENNE EUROPISCHE NORM April 2010 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische No
5、rmung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50540:2010 E ICS 29.240.20 English version Conductors for overhead lines - Aluminium Conductors Steel Supported (ACS
6、S) Conducteurs pour lignes ariennes - Conducteurs faible dilatation (ACSS) Leiter fr Freileitungen - Aluminiumleiter, von beschichtetem Stahl getragen (Ausfhrung ACSS) This European Standard was approved by CENELEC on 2010-04-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regu
7、lations 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 standards may be obtained on application to the Central Secretariat or to any CENELEC member. Th
8、is 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 notified to the Central Secretariat has the same status as the official versions. CENELEC membe
9、rs are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia
10、, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 50540:2010EN 50540:2010 - 2 - Foreword This European Standard was prepared by CENELEC BTTF 132-1, Aluminium conductors steel supported (ACSS type) for overhead electrical lines, based on the text of BT/ES0023/NOT. It was submitted
11、to the CENELEC Unique Acceptance Procedure and was approved by CENELEC as EN 50540 on 2010-04-01. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
12、 rights. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2011-04-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2013-04-01 _
13、 BS EN 50540:2010- 3 - EN 50540:2010 Contents 1 Scope . 5 1.1 Outer/conductive layers . 5 1.2 Steel core 5 2 Normative references 5 3 Definitions 6 4 Designation system . 7 5 Requirements for ACSS stranded conductors 8 5.1 Material . 8 5.2 Stranding . 11 5.3 Surface condition . 12 5.4 Conductor diam
14、eter . 12 5.5 Mechanical characteristics . 12 5.6 Joints 13 5.7 Conductor mass per unit length . 13 5.8 Nominal DC resistance 15 5.9 Variation in Aluminium area . 16 6 Tests 16 6.1 Classification of tests . 16 6.2 Sample size . 17 6.3 Rounding rules 17 6.4 Properties of conductor 17 6.5 Properties o
15、f wires . 19 6.6 Inspection 19 6.7 Acceptance or rejection . 20 7 Packaging and marking . 20 7.1 Packaging . 20 7.2 Marking and tare 20 7.3 Random lengths 20 7.4 Accuracy of lengths . 20 7.5 Drum barrel dimensions . 21 8 Information to be clarified by the purchaser and manufacturer . 21 Annex A (nor
16、mative) Stress - strain test method 22 Annex B (informative) Lay ratios used for calculation of increments due to stranding in Tables 5 and 6 . 25 Annex C (normative) Test for ability of a conductor to be erected using tension stringing . 26 Annex D (informative) AC resistance measurement method 28
17、Figures Figure C.1 - Test arrangement 27 Figure C.2 Drum holder and tensioner setup . 27 BS EN 50540:2010EN 50540:2010 - 4 - Tables Table 1 - Mechanical characteristics steel ST6A wires before stranding . 8 Table 2 - Characteristics of Extra High Strength Zn95Al5 steel wires (before stranding) 9 Tab
18、le 3 - Characteristics of Ultra High Strength Zn95Al5 steel wires (before stranding) 9 Table 4 - Characteristics of Extra High Strength aluminium clad steel wires 20EHSA (before stranding) . 10 Table 5 - Characterstics of Extra High Strength aluminium clad steel wires 14EHSA (before stranding) . 10
19、Table 6 - Physical constants 11 Table 7 - Lay ratios for galvanized steel, Zn95Al5 coated steel or aluminium-clad steel layers . 12 Table 8 - Lay ratios for aluminium layers . 12 Table 9 - Number of joints permitted in a given length . 13 Table 10 - Increments due to stranding for formed Al wires 14
20、 Table 11 - Increments due to stranding for round Al wires 15 Table 12 - Type and sample tests for conductors and wires . 16 Table 13 - Permitted reductions in wire properties after stranding 19 Table B.1 - Lay ratios used for calculation of increments due to stranding in Tables 10 b) Zn95Al5 alloy
21、coated steel wire with MM (mischmetal) as per EN 10244-2 and mechanical and mass of coating requirements as per Tables 2 and 3, in the following options: i Extra High Strength; ii Ultra High Strength. NOTE MM elements are mandatory. Coatings without MM can be used, if agreed between Supplier and Pur
22、chaser. Tests without MM must show the same behaviour than the MM coatings. c) Aluminium-clad steel wire 20,3 % conductivity in the following options: - as per EN 61232 with class designation 20 SA; - aluminium-clad steel wire Extra High Strength with designation 20 EHSA as per Table 4. d) Aluminium
23、-clad steel wire 14 % conductivity, Extra High Strength with designation 14 EHSA as per Table 5. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest
24、edition of the referenced document (including any amendments) applies. EN 10244-2 Steel wire and wire products. Non-ferrous metallic coating on steel wire Part 2: zinc or zinc alloy coatings EN 50182 Conductors for overhead lines - Round wire concentric lay stranded conductors EN 50189 Conductors fo
25、r overhead lines - Zinc coated steel wires (for testing purposes only) EN 60889 Hard-drawn aluminum wire for overhead line conductors (for testing purposes only) (IEC 60889) EN 61232 Aluminium-clad steel wires for electrical purposes (IEC 61232) EN 62219 Overhead electrical conductors - Formed wire,
26、 concentric lay, stranded conductors (IEC 62219) IEC 60050-466 International Electrotechnical Vocabulary (IEV) - Chapter 466: Overhead lines IEC 60468 Method of measurement of resistivity of metallic materials BS EN 50540:2010EN 50540:2010 - 6 - 3 Definitions In addition to the definitions given in
27、IEC 60050-466, EN 50182 and EN 62219, the following definitions apply. 3.1 aluminium the most abundant of all metals. It is a ductile metal, silver-white in colour, which can be readily worked by rolling, drawing, spinning, extruding, and forging. For the purpose of this European Standard, the alumi
28、nium must be annealed 3.2 conductor material intended to be used for carrying electric current consisting of a plurality of uninsulated wires twisted together 3.3 concentric lay stranded conductor conductor composed of a central core surrounded by one or more adjacent layers of wires being laid heli
29、cally in opposite directions 3.4 lay length axial length of one complete turn of the helix formed by an individual wire in a stranded conductor 3.5 lay ratio ratio of the lay length to the external diameter of the corresponding layer of wires in the stranded conductor 3.6 direction of lay 3.6.1 dire
30、ction of lay (general definition) direction of twist of a layer of wires as it moves away from the viewer NOTE A right-hand lay is a clockwise direction and a left-hand lay is an anti-clockwise direction. 3.6.2 direction of lay (alternative definition) the direction of lay is defined as right-hand o
31、r left-hand NOTE With right-hand lay, 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. 3.7 round wire filamen
32、t of drawn metal having a constant circular cross-section 3.8 formed wire filament of metal having a constant cross-section and a non-circular shape 3.9 equivalent wire diameter the diameter of a round wire which would have the same cross-sectional area, mass and electrical resistance as a given for
33、med wire of the same material BS EN 50540:2010- 7 - EN 50540:2010 3.10 lot group of conductors manufactured by the same manufacturer under similar conditions of production NOTE A lot may consist of part or all of the purchased quantity. 3.11 nominal name or identifying value of a measurable property
34、 by which a conductor or component of a conductor is identified and to which tolerances are applied NOTE Nominal values should be target values. 3.12 rated tensile strength an estimate of the conductor breaking load calculated using the specified tensile properties of the component wires 4 Designati
35、on system a) Annealed aluminium wire: AL0 b) Galvanized steel wire according to EN 50189: ST6A c) Zn95Al5 coated steel: MEHST or MUHST with mischmetal elements Zn95Al5 coated steel: EHST or UHST without mischmetal elements (see note in Scope) d) Aluminium clad steel 20,3 % according to EN 61232 clas
36、ses: 20SA or 20EHSA e) Aluminium clad steel 14 % EHS: 14EHSA EXAMPLES: 401-AL0/28-ST6A Conductor made of AL0 wires around a core of ST6 class A zinc coated steel wires. The integer area of AL0 is 401 mm2and that of ST6A wires, 28 mm2. 401-AL0/28-MEHST Conductor made of AL0 wires around a core of Zn9
37、5Al5 coated MEHST steel wires. The integer area of AL0 is 401 mm2and that of Zn95Al5 wires, 28 mm2. 401-AL0/28-20EHSA Conductor made of AL0 wires around a core of Aluminium clad steel 20,3 % wires. The integer area of AL0 is 401 mm2and that of Aluminium clad steel 20,3 %, 28 mm2. 401-AL0/28-14EHSA C
38、onductor made of AL0 wires around a core Aluminium clad 14 % EHS steel wires. The integer area of AL0 is 401 mm2and that Aluminium clad steel 14 % wires, 28 mm2. f) Generic designations: - ACSS: Concentric-Lay Stranded Aluminium Conductors, Coated Steel Supported - ACSS/TW: Formed Wire Compact Conce
39、ntric-Lay Stranded Aluminium Conductors, Coated Steel Supported. BS EN 50540:2010EN 50540:2010 - 8 - 5 Requirements for ACSS stranded conductors 5.1 Material 5.1.1 ACSS conductors shall consist of a supporting core made of the following: a) Galvanized steel wire type ST6A according to Table 1 (based
40、 on EN 50189) Table 1 - Mechanical characteristics steel ST6A wires before stranding Nominal wire diameter mm Diameter tolerance Stress at 1 % Ultimate tensile strength RmElongation at breaking on 250 mm A250Mandrel diameter for wrapping and adherence test N of 1 min immersions Mass of coating Numbe
41、r of torsionsaIndividual wires Average Over Up to mm MPa N/mm2% xD N g/m2N + - min. min. min. min. min. 1,75 2,25 2,75 3,00 3,50 4,25 2,25 2,75 3,00 3,50 4,25 4,75 0,04 0,04 0,05 0,05 0,06 0,06 0,04 0,04 0,05 0,05 0,06 0,06 1 450 1 410 1 410 1 380 1 340 1 340 1 700 1 650 1 650 1 600 1 600 1 600 1 80
42、0 1 750 1 750 1 700 1 700 1 700 2,0 2,0 2,5 2,5 2,5 2,5 4 4 4 4 5 5 2 1/2 3 3 3 1/2 3 1/2 4 215 230 230 245 260 275 14 14 12 12 10 10 aIn case of galvanizing before final drawing, minimum number of torsions will be increase by 2 and minimum elongation will be decreased in 1 %. BS EN 50540:2010- 9 -
43、EN 50540:2010 b) Round steel wires coated by Zn95Al5 alloy, complying with the requirements of Tables 2 and 3 Rest of characteristics according to EN 50189 and zinc alloy coatings according to EN 10244-2 Table 2 - Characteristics of Extra High Strength Zn95Al5 steel wires (before stranding) Nominal
44、wire diameter mm Diameter tolerance Stress at 1 % Ultimate tensile strength RmElongation at breaking on 250 mm A250Mandrel diameter for wrapping test Mandrel diameter for adherence testMass of coating Over Up to mm MPa MPa % g/m2+ - min. min. min. xD xD min. 1,91 2,29 2,65 3,05 3,56 4,58 2,28 2,64 3
45、,04 3,55 4,57 4,82 0,038 0,051 0,051 0,076 0,102 0,102 0,025 0,051 0,051 0,051 0,076 0,076 1 550 1 515 1 515 1 480 1 450 1 450 1 825 1 790 1 790 1 760 1 725 1 725 3,0 3,0 3,0 3,5 3,5 3,5 4 4 4 4 4 4 4 4 4 4 5 5 214 229 244 259 274 305 Table 3 - Characteristics of Ultra High Strength Zn95Al5 steel wi
46、res (before stranding) Nominal wire diameter mm Diameter tolerance Stress at 1 % Ultimate tensile strength RmElongation at breaking on 250 mm A250Mandrel diameter for wrapping test Mandrel diameter for adherence test Mass of coating Over Up to (mm) MPa MPa (%) g/m2+ - min. min. min. xD xD min. 1,91
47、2,29 2,65 3,05 3,56 4,58 2,28 2,64 3,04 3,55 4,57 4,82 0,038 0,051 0,051 0,076 0,102 0,102 0,025 0,051 0,051 0,051 0,076 0,076 1 580 1 550 1 550 1 515 1 480 1 480 1 965 1 900 1 900 1 860 1 825 1 825 3,0 3,0 3,0 3,5 3,5 3,5 4 4 4 4 4 4 4 4 4 4 5 5 214 229 244 259 274 305 BS EN 50540:2010EN 50540:2010
48、 - 10 - c) Round aluminium clad steel wires type 20 SA, fully complying with the requirements of EN 61232 d) Round aluminium clad Extra High Strength steel wires type 20 EHSA, as per the requirements of Table 4 Table 4 - Characteristics of Extra High Strength aluminium clad steel wires 20EHSA (befor
49、e stranding) Diameter mm Diameter tolerance mm Stress at 1%MPa Tensile strengthMPa Elongation at 250 mm % Torsions N Over Up to min. min. min. min. 1,28 2,28 0,04 1 390 1 620 1,5 20 2,29 3,04 0,05 1 360 1 580 1,5 20 3,05 3,55 0,05 1 330 1 545 1,5 20 3,56 4,82 0,06 1 300 1 515 1,5 20 e) Round aluminium clad Extra High Strength steel wires type 14EHSA, as per the requirements of Table 5 Table 5 - Characterstics of Extra High Strength aluminium clad steel wires 14EHSA (before stranding) Diameter mm Diameter tolerance mm Stres
