1、Designation: B 779 03Standard Specification forShaped Wire Compact Concentric-Lay-Stranded AluminumConductors, Steel-Reinforced (ACSR/TW)1This standard is issued under the fixed designation B 779; the number immediately following the designation indicates the year oforiginal adoption or, in the case
2、 of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers shaped wire compactconcentric-lay-stranded aluminum conductor, st
3、eel-reinforced(ACSR/TW) and its component wires for use as overheadelectrical conductors (Explanatory Note 1 and Note 2).1.2 The values stated in inch-pound units are to be regardedas the standard with the exception of temperature, density, andresistivity. The SI equivalents of inch-pound units may
4、beapproximate.NOTE 1ACSR/TW is designed to increase the aluminum area for agiven diameter of conductor by the use of trapezoidally shaped wires(TW). The conductors consist of a central core of round steel wire(s)surrounded by two or more layers of trapezoidal aluminum 1350-H19wires. Different strand
5、ings of the same size of conductor are identified bytype, which is the approximate ratio of steel area to aluminum areaexpressed in percent (Table 1, Table 2 and Table 3). For the purpose of thisspecification, the sizes listed in Table 1 and Table 2 are tabulated on thebasis of the finished conducto
6、r having an area or outside diameter equal tothat of specific sizes of standard ACSR so as to facilitate conductorselection.NOTE 2The aluminum and temper designations conform to ANSIStandard H 35.1. Aluminum 1350 corresponds to Unified NumberingSystem (UNS) A91350 in accordance with Practice E 527.2
7、. Referenced Documents2.1 ASTM Standards:B 230 Specification for Aluminum 1350-H19 Wire for Elec-trical Purposes2B 232 Specification for Concentric-Lay-Stranded Alumi-num Conductors, Coated Steel-Reinforced (ACSR)2B 263 Test Method for Determination of Cross-SectionalArea of Stranded Conductors2B 34
8、1 Specification for Aluminum-Coated (Aluminized)Steel Core Wire for Aluminum Conductors, Steel Rein-forced (ACSR/AZ)2B 354 Terminology Relating to Uninsulated Metallic Elec-trical Conductors2B 498 Specification for Zinc-Coated (Galvanized) SteelCore Wire for Aluminum Conductors, Steel Reinforced(ACS
9、R)2B 500 Specification for Metallic Coated Stranded SteelCore for Aluminum Conductors, Steel Reinforced(ACSR)2B 502 Specification for Aluminum-Clad Steel Core Wire forAluminum Conductors, Aluminum-Clad Steel Reinforced2B 549 Specification for Concentric-Lay-Stranded Alumi-num Conductors, Aluminum-Cl
10、ad Steel Reinforced(ACSR/AW)2B 606 Specification for High-Strength Zinc-Coated (Galva-nized) Steel Core Wire for Aluminum and Aluminum AlloyConductors, Steel Reinforced2B 802 Specification for Zinc-5 % Aluminum-MischmetalAlloy-Coated Steel Core Wire for Aluminum Conductors,Steel Reinforced (ACSR)2B
11、803 Specification for High-Strength Zinc-5 %Aluminum-Mischmetal Alloy-Coated Steel Core Wire forAluminum and Aluminum-Alloy Conductors, Steel Rein-forced2E 29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications3E 527 Practice for Numbering Metals and Alloys
12、 (UNS)42.2 Other Documents:ANSI H35.1 American National Standard Alloy and Tem-per Designation Systems for Aluminum5NBS Handbook 100Copper Wire Tables of the NationalBureau of Standards63. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 ACSR/TW covered by this specification has f
13、ive typesof coated core wire and one type of aluminum-clad core wirewhich are designated by abbreviations as follows (ExplanatoryNote 2):3.1.1.1 ACSR/TW/AWACSR/TW using aluminum-cladsteel wire (Specification B 502).1This specification is under the jurisdiction of ASTM Committee B01 onElectrical Cond
14、uctors and is the direct responsibility of Subcommittee B01.07 onConductors of Light Metals.Current edition approved April 10, 2003. Published June 2003. Originallyapproved in 1987. Last previous edition approved in 1996 as B 779 96.2Annual Book of ASTM Standards, Vol 02.03.3Annual Book of ASTM Stan
15、dards, Vol 14.02.4Annual Book of ASTM Standards, Vol 01.01.5Available from American National Standards Institute, 11 West 42nd Street,New York, NY 10036.6Available from National Technical Information Service, 5285 Port Royal Road,Springfield, VA 22161.1Copyright ASTM International, 100 Barr Harbor D
16、rive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.1.1.2 ACSR/TW/AZACSR/TW using aluminum-coated(aluminized) steel wire (Specification B 341).3.1.1.3 ACSR/TW/GAACSR/TW using Class A zinc-coated steel wire (Specification B 498).3.1.1.4 ACSR/TW/GBACSR/TW using Class B zinc-coated ste
17、el wire (Specification B 498).3.1.1.5 ACSR/TW/GCACSR / TW using Class C zinc-coated steel wire (Specification B 498).3.1.1.6 ACSR/TW/HSACSR/TW using extra high-strength steel wire (Specification B 606).3.1.1.7 ACSR/TW/MAACSR/TW using Class A zinc-5 %aluminum-mischmetal alloy-coated steel core wire (
18、Specifica-tion B 802).3.1.1.8 ACSR/TW/MBACSR/TW using Class B zinc-5 %aluminum-mischmetal alloy-coated steel core wire (Specifica-tion B 802).3.1.1.9 ACSR/TW/MCACSR/TW using Class C zinc-5 %aluminum-mischmetal alloy-coated steel core wire (Specifica-tion B 802).3.1.1.10 ACSR/TW/MSACSR/TW using high-
19、strengthzinc-5 % mischmetal alloy-coated steel core wire (Specifica-tion B 803).4. Ordering Information4.1 Orders for material under this specification shall includethe following information:4.1.1 Quantity of each size,4.1.2 Conductor size: kcmil area and diameter,4.1.3 Conductor type and number of
20、wires, aluminum andsteel (Tables 1-3),4.1.4 Type of steel core wire and if zinc or Zn-5 % -MMalloy coated, Class (A, B, and C) of coating (see 5.2),4.1.5 Special tension test, if required (see 9.2),4.1.6 Place of inspection (Section 15),4.1.7 Package size and type (see 16.1),4.1.8 Special package ma
21、rkings, if required (Section 16),and4.1.9 Heavy wood lagging, if required (see 16.3).5. Requirement for Wires5.1 Before stranding, the trapezoidal aluminum wires (seeTerminology B 354) shall conform to the requirements ofSpecification B 230 except for shape and diameter tolerance.The tensile strengt
22、h and elongation requirements of trapezoidalwires shall be the same as for round wires of equal area. TheTABLE 1 Construction Requirements for Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors, Coated SteelReinforced Size to Have Area Equal to ACSR, Class AAACSR/TW ConductorSizeSize an
23、d Stranding of ACSRwith Equal AreaNumber ofAluminumWiresNumber ofLayersSteel Core StrandingMass perUnitLength,Alb/1000 ftRatedStrength,1000 lbBNominalOutsideDiameter, in.kcmil Type kcmil StrandingNumber ofWiresDiameter,in.336.4 6 336.4 18/1 14 2 1 0.1367 365 8.6 0.63477.0 13 477.0 24/7 18 2 7 0.0940
24、 613 17.2 0.78477.0 16 477.0 26/7 18 2 7 0.1053 655 19.4 0.79556.5 13 556.5 24/7 18 2 7 0.1015 715 20.0 0.84556.5 16 556.5 26/7 20 2 7 0.1138 765 22.6 0.85636.0 3 636.0 36/1 27 3 1 0.1329 646 13.5 0.85636.0 13 636.0 24/7 18 2 7 0.1085 816 22.9 0.89636.0 16 636.0 26/7 20 2 7 0.1216 874 25.4 0.91795.0
25、 7 795.0 45/7 17 2 7 0.0886 892 21.0 0.96795.0 10 795.0 22/7 18 2 7 0.1108 975 25.9 0.98795.0 13 795.0 54/7 20 2 7 0.1213 1021 28.2 0.99795.0 16 795.0 26/7 20 2 7 0.1360 1092 31.8 1.01954.0 5 954.0 42/7 30 3 7 0.0837 1029 23.7 1.05954.0 7 954.0 45/7 32 3 7 0.0971 1075 25.9 1.06954.0 13 954.0 54/7 20
26、 2 7 0.1329 1226 33.5 1.081033.5 5 1033.5 42/7 30 3 7 0.0871 1115 25.7 1.091033.5 7 1033.5 45/7 32 3 7 0.1010 1165 28.1 1.101033.5 13 1033.5 54/7 21 2 7 0.1363 1327 36.3 1.131113.0 5 1113.0 42/7 30 3 7 0.0904 1201 27.5 1.131113.0 7 1113.0 45/7 33 3 7 0.1049 1254 30.3 1.141113.0 13 1113.0 54/19 38 3
27、19 0.0862 1429 39.1 1.191192.5 5 1192.5 42/7 30 3 7 0.0936 1286 29.5 1.171192.5 7 1192.5 45/7 33 3 7 0.1085 1343 32.4 1.181192.5 13 1192.5 54/19 38 3 19 0.0892 1530 41.9 1.221272.0 5 1272.0 42/7 30 3 7 0.0967 1372 31.4 1.201272.0 7 1272.0 45/7 35 3 7 0.1121 1433 34.6 1.221272.0 13 1272.0 54/19 39 3
28、19 0.0921 1632 44.1 1.261351.5 7 1351.5 45/7 35 3 7 0.1155 1522 36.7 1.261351.5 13 1351.5 54/19 39 3 19 0.0949 1734 46.8 1.301431.0 7 1431.0 45/7 36 3 7 0.1189 1613 38.9 1.291431.0 13 1431.0 54/19 39 3 19 0.0977 1836 49.6 1.341590.0 7 1590.0 45/7 36 3 7 0.1253 1792 42.2 1.361590.0 13 1590.0 54/19 42
29、 3 19 0.1030 2040 55.1 1.411780.0 8 1780.0 84/19 37 3 19 0.0874 2063 50.7 1.452156.0 8 2156.0 84/19 64 4 19 0.0961 2515 61.1 1.61AMass per unit length is based on Class A zinc-coated steel.BRated strengths were calculated in accordance with 9.1 using steel stresses at 1 % for Class A coating in acco
30、rdance with Specification B 498 (1 kip = 1000 lbf = 4.448kN).B779032TABLE2ConstructionRequirementsforShapedWireCompactConcentric-Lay-StrandedAluminumConductors,CoatedSteelReinforcedSizedtoHaveDiameterEqualtoACSR,ClassAACodeWordAACSR/TWConductorSizeSizeandStrandingofACSRwithEqualDiameterNumberofAlumi
31、numWiresNumberofLayersSteelCoreStrandingMassperUnitLength,Blb/1000ftRatedStrength, 1000lbCNominal OutsideDiameter,in.DkcmilETypekcmilEStrandingNumberofWiresDiameter,in.DMonongahela/TW405.16336.418/114210.152044110.20.68Mohawk/TW571.713477.024/718270.103073520.60.85Calumet/TW565.316477.026/720270.114
32、677622.90.86Mystic/TW666.613556.524/720270.111185624.00.91Oswego/TW664.816556.526/720270.124491326.60.93Maumee/TW768.213636.024/720270.119598827.70.98Wabash/TW762.816636.026/720270.1331104730.50.99Nechako/TW768.93636.036/127310.152078516.40.93Kettle/TW957.27795.045/732370.0973107926.01.06Fraser/TW94
33、6.710795.022/735370.1154114229.61.08Columbia/TW966.213795.054/721270.1338124134.01.09Suwannee/TW959.616795.026/722270.1493131837.01.11Cheyenne/TW1168.15954.042/730370.0926126028.91.16Genesee/TW1158.07954.045/733370.1078130831.61.17Hudson/TW1158.413954.054/725270.1467148939.61.20Catawba/TW1272.051033
34、.542/730370.0967137231.41.20Nelson/TW1257.171033.545/735370.1115141734.21.21Yukon/TW1233.6131033.554/7383190.0910158642.91.25Truckee/TW1372.551113.042/730370.1004148133.41.25Mackenzie/TW1359.771113.045/736370.1159153036.91.26Thames/TW1334.6131113.054/19393190.0944171346.31.29St.Croix/TW1467.851192.5
35、42/733370.1041158535.81.29Miramichi/TW1455.371192.545/736370.1200164039.21.30Merrimack/TW1433.6131192.554/19393190.0978184049.71.34Platte/TW1569.051272.042/733370.1074169338.21.33Potomac/TW1557.471272.045/736370.1241175541.91.35RioGrande/TW1533.3131272.054/19393190.1012196853.21.38Schuylkill/TW1657.
36、471351.545/736370.1280186844.01.39Pecos/TW1622.0131351.554/19393190.1064210757.51.42PeeDee/TW1758.671431.045/737370.1319198246.71.43James/TW1730.6131431.054/19393190.1075222159.41.47Athabaska/TW1949.671590.045/742370.1392219951.91.50Cumberland/TW1926.9131590.054/19423190.1133247165.31.55Powder/TW215
37、3.881780.084/19644190.0961249861.11.60Santee/TW2627.382156.084/19644190.1062304874.51.76ACodewordsshowninthiscolumnareobtainedfrom“Publication50,CodeWordsforOverheadAluminumElectricalConductors,”bytheAluminumAssociation.Theyareprovidedforinformationonly.BMassperunitlengthisbasedonClassAzinc-coatedst
38、eel.Toconverttokg/km,multiplythelb/1000ftvaluex1.4887.CRatedstrengthwascalculatedinaccordancewith9.1usingsteelstressesat1%forClassAcoatinginaccordancewithSpecificationB498(1kip=1000lbf=4.445kN).DToconvertthediameter(inches)tomm,multiplytheinchvaluex25.4.EToconvertfromkcmiltomm2area,multiplythekcmilv
39、aluex5.067x10-4.B779033area tolerances shall be such that the finished conductorconforms to Section 12.5.2 Before stranding, the steel core wire shall meet therequirements of Specifications B 341, B 498, B 502, B 606,B 802, or B 803, whichever is applicable.5.3 Following stranding, the steel core sh
40、all meet therequirements of Specification B 500.6. Joints6.1 Electric-butt welds, electric-butt cold-upset welds, orcold-pressure welds may be made in the individual aluminumwires during the stranding process. No weld shall occur within50 ft (15 m) of any other weld in the completed conductor(Explan
41、atory Note 3).6.2 There shall be no joints made in the finished steel wires.7. Lay7.1 The preferred lay of the outside layer of aluminum wiresof shaped wire compact aluminum conductors, steel-reinforced, having a steel core of 7 or 19 wires and havingmultiple layers of aluminum wires, is 11 times th
42、e outsidediameter of the conductor but the lay shall not be less than 10nor more than 13 times that diameter (Explanatory Note 4).7.2 The preferred lay of the layer immediately beneath theoutside layer of aluminum wires is 13 times the outsidediameter of such layer but the lay shall be not less than
43、 10 normore than 16 times that diameter.7.3 The lay of the inner layers of aluminum wires shall benot less than 10 nor more than 17 times the outside diameter ofsuch layer.7.4 The preferred lay of the 6-wire layer of 7- and 19-wiresteel cores is 25 times the outside diameter of the 6-wire layerbut t
44、he lay shall be not less than 18 nor more than 30 times thatdiameter.7.5 The preferred lay of the 12-wire layer of 19-wire steelcore is 20 times the outside diameter of the core but the layshall be not less than 16 nor more than 24 times that diameter.7.6 The direction of lay of the outside layer of
45、 aluminumwires shall be right-hand.7.7 The direction of lay of the aluminum and steel wiresshall be reversed in successive layers.7.8 For the purpose of this specification the lay factor is thelength of lay of a given layer divided by its outside diameter.8. Construction8.1 The nominal aluminum cros
46、s-sectional area, conductortype, the nominal number of aluminum wires, the number oflayers, the number and diameter of the steel core wire, the massper unit length, the rated strength and the outside diameter ofthe shaped wire compact concentric-lay-stranded aluminumconductors, steel-reinforced, sha
47、ll be as shown in Tables 1-3.NOTE 3Exception to 8.1. Because the final design of a shaped wirecompact conductor is contingent on several factors such as layer diameter,wire width and thickness, etc., the actual configuration of a given size mayvary between manufacturers. This might result in a sligh
48、t variation in thenumber of wires from that shown in Tables 1-3, and also in the dimensionsof the individual wires (See Table 4).9. Rated Strength of Conductor9.1 The rated strength of a conductor, as shown in Tables1-3, shall be taken as the aggregate strength of the aluminumand steel components ca
49、lculated as follows: The strengthcontribution of the aluminum 1350-H19 wires shall be taken asthe percentage, indicated in Table 5 in accordance with thenumber of aluminum layers, of the sum of the wire strengthscalculated from the specified diameter of the round wireshaving the same area as the trapezoidal wires used in themanufacture of the conductor, and the appropriate minimumaverage tensile strength given in Specification B 230. Thestrength contribution of the steel core wires shall be taken asthe percentage, indicated in Table 5, of the sum of the strengthsof the st
