1、Designation: B 779 03 (Reapproved 2009)Standard 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 adopti
2、on or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers shaped wire compactconcentric-lay-stranded alumi
3、num conductor, steel-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 standard. The values given in parentheses are mathematicalconversions to SI units that are provided
4、 for information onlyand are not considered standard.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 a
5、luminum 1350-H19wires. Different strandings 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 tabulat
6、ed on thebasis of the finished conductor 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) A91
7、350 in accordance with Practice E 527.2. Referenced Documents2.1 ASTM Standards:2B 230/B 230M Specification for Aluminum 1350H19Wire for Electrical PurposesB 232/B 232M Specification for Concentric-Lay-StrandedAluminum Conductors, Coated-Steel Reinforced (ACSR)B 263 Test Method for Determination of
8、Cross-SectionalArea of Stranded ConductorsB 341/B 341M Specification for Aluminum-Coated (Alu-minized) Steel Core Wire forAluminum Conductors, SteelReinforced (ACSR/AZ)3B 354 Terminology Relating to Uninsulated Metallic Elec-trical ConductorsB 498/B 498M Specification for Zinc-Coated (Galvanized)Ste
9、el Core Wire for Use in Overhead Electrical ConductorsB 500/B 500M Specification for Metallic Coated StrandedSteel Core for Use in Overhead Electrical ConductorsB 502 Specification forAluminum-Clad Steel CoreWire forAluminum Conductors, Aluminum-Clad Steel ReinforcedB 549 Specification for Concentri
10、c-Lay-Stranded Alumi-num Conductors, Aluminum-Clad Steel Reinforced(ACSR/AW)B 606 Specification for High-Strength Zinc-Coated (Galva-nized) Steel Core Wire for Aluminum and Aluminum-Alloy Conductors, Steel ReinforcedB 802/B 802M Specification for Zinc5 % Aluminum-Mischmetal Alloy-Coated Steel Core W
11、ire for AluminumConductors, Steel Reinforced (ACSR)B 803 Specification for High-Strength Zinc5 %Aluminum-Mischmetal Alloy-Coated Steel Core Wire forUse in Overhead Electrical ConductorsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE 527 Practice fo
12、r Numbering Metals and Alloys in theUnified Numbering System (UNS)2.2 Other Documents:ANSI H35.1 American National Standard Alloy and Tem-per Designation Systems for Aluminum4NBS Handbook 100Copper Wire Tables of the NationalBureau of Standards53. Terminology3.1 Definitions of Terms Specific to This
13、 Standard:1This specification is under the jurisdiction of ASTM Committee B01 onElectrical Conductors and is the direct responsibility of Subcommittee B01.07 onConductors of Light Metals.Current edition approved April 1, 2009. Published May 2009. Originallyapproved in 1987. Last previous edition app
14、roved in 2003 as B 779 03.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Withdrawn. The last approved versi
15、on of this historical standard is referencedon www.astm.org.4Available from American National Standards Institute, 11 West 42nd Street,New York, NY 10036.5Available from National Technical Information Service, 5285 Port Royal Road,Springfield, VA 22161.1Copyright ASTM International, 100 Barr Harbor
16、Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.1.1 ACSR/TW covered by this specification has five 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-clads
17、teel wire (Specification B 502).3.1.1.2 ACSR/TW/AZACSR/TW using aluminum-coated(aluminized) steel wire (Specification B 341/B 341M).3.1.1.3 ACSR/TW/GAACSR/TW using Class A zinc-coated steel wire (Specification B 498/B 498M).3.1.1.4 ACSR/TW/GBACSR/TW using Class B zinc-coated steel wire (Specificatio
18、n B 498/B 498M).3.1.1.5 ACSR/TW/GCACSR / TW using Class C zinc-coated steel wire (Specification B 498/B 498M).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 (Specifi
19、ca-tion B 802/B 802M).3.1.1.8 ACSR/TW/MBACSR/TW using Class B zinc-5 %aluminum-mischmetal alloy-coated steel core wire (Specifica-tion B 802/B 802M).3.1.1.9 ACSR/TW/MCACSR/TW using Class C zinc-5 %aluminum-mischmetal alloy-coated steel core wire (Specifica-tion B 802/B 802M).3.1.1.10 ACSR/TW/MSACSR/
20、TW using high-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
21、and number of 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 Spec
22、ial package markings, if required (Section 16),and4.1.9 Heavy wood lagging, if required (see 16.3).TABLE 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 and Stra
23、nding 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 613 1
24、7.2 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 7 795
25、.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 2 7 0
26、.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 19 0.0
27、862 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 19 0.0
28、921 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 3 19
29、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 accordance
30、 with Specification B 498/B 498M (1 kip = 1000lbf = 4.448 kN).B 779 03 (2009)2TABLE 2 Construction Requirements for Shaped Wire Compact Concentric-Lay-Stranded Aluminum Conductors, Coated Steel Reinforced Sized to Have Diameter Equal toACSR, Class AACode WordAACSR/TW ConductorSizeSize and Stranding
31、of ACSRwith Equal DiameterNumber ofAluminumWiresNumber ofLayersSteel Core StrandingMassper UnitLength,Blb/1000 ftRatedStrength,1000 lbCNominalOutsideDiameter, in.DkcmilEType kcmilEStrandingNumber ofWiresDiameter,in.DMonongahela/TW 405.1 6 336.4 18/1 14 2 1 0.1520 441 10.2 0.68Mohawk/TW 571.7 13 477.
32、0 24/7 18 2 7 0.1030 735 20.6 0.85Calumet/TW 565.3 16 477.0 26/7 20 2 7 0.1146 776 22.9 0.86Mystic/TW 666.6 13 556.5 24/7 20 2 7 0.1111 856 24.0 0.91Oswego/TW 664.8 16 556.5 26/7 20 2 7 0.1244 913 26.6 0.93Maumee/TW 768.2 13 636.0 24/7 20 2 7 0.1195 988 27.7 0.98Wabash/TW 762.8 16 636.0 26/7 20 2 7
33、0.1331 1047 30.5 0.99Nechako/TW 768.9 3 636.0 36/1 27 3 1 0.1520 785 16.4 0.93Kettle/TW 957.2 7 795.0 45/7 32 3 7 0.0973 1079 26.0 1.06Fraser/TW 946.7 10 795.0 22/7 35 3 7 0.1154 1142 29.6 1.08Columbia/TW 966.2 13 795.0 54/7 21 2 7 0.1338 1241 34.0 1.09Suwannee/TW 959.6 16 795.0 26/7 22 2 7 0.1493 1
34、318 37.0 1.11Cheyenne/TW 1168.1 5 954.0 42/7 30 3 7 0.0926 1260 28.9 1.16Genesee/TW 1158.0 7 954.0 45/7 33 3 7 0.1078 1308 31.6 1.17Hudson/TW 1158.4 13 954.0 54/7 25 2 7 0.1467 1489 39.6 1.20Catawba/TW 1272.0 5 1033.5 42/7 30 3 7 0.0967 1372 31.4 1.20Nelson/TW 1257.1 7 1033.5 45/7 35 3 7 0.1115 1417
35、 34.2 1.21Yukon/TW 1233.6 13 1033.5 54/7 38 3 19 0.0910 1586 42.9 1.25Truckee/TW 1372.5 5 1113.0 42/7 30 3 7 0.1004 1481 33.4 1.25Mackenzie/TW 1359.7 7 1113.0 45/7 36 3 7 0.1159 1530 36.9 1.26Thames/TW 1334.6 13 1113.0 54/19 39 3 19 0.0944 1713 46.3 1.29St. Croix/TW 1467.8 5 1192.5 42/7 33 3 7 0.104
36、1 1585 35.8 1.29Miramichi/TW 1455.3 7 1192.5 45/7 36 3 7 0.1200 1640 39.2 1.30Merrimack/TW 1433.6 13 1192.5 54/19 39 3 19 0.0978 1840 49.7 1.34Platte/TW 1569.0 5 1272.0 42/7 33 3 7 0.1074 1693 38.2 1.33Potomac/TW 1557.4 7 1272.0 45/7 36 3 7 0.1241 1755 41.9 1.35Rio Grande/TW 1533.3 13 1272.0 54/19 3
37、9 3 19 0.1012 1968 53.2 1.38Schuylkill/TW 1657.4 7 1351.5 45/7 36 3 7 0.1280 1868 44.0 1.39Pecos/TW 1622.0 13 1351.5 54/19 39 3 19 0.1064 2107 57.5 1.42Pee Dee/TW 1758.6 7 1431.0 45/7 37 3 7 0.1319 1982 46.7 1.43James/TW 1730.6 13 1431.0 54/19 39 3 19 0.1075 2221 59.4 1.47Athabaska/TW 1949.6 7 1590.
38、0 45/7 42 3 7 0.1392 2199 51.9 1.50Cumberland/TW 1926.9 13 1590.0 54/19 42 3 19 0.1133 2471 65.3 1.55Powder/TW 2153.8 8 1780.0 84/19 64 4 19 0.0961 2498 61.1 1.60Santee/TW 2627.3 8 2156.0 84/19 64 4 19 0.1062 3048 74.5 1.76ACode words shown in this column are obtained from “Publication 50, Code Word
39、s for Overhead Aluminum Electrical Conductors,” by the Aluminum Association. They are provided for information only.BMass per unit length is based on Class A zinc-coated steel. To convert to kg/km, multiply the lb/1000 ft value x 1.4887.CRated strength was calculated in accordance with 9.1 using ste
40、el stresses at 1 % for Class A coating in accordance with Specification B 498/B 498M (1 kip = 1000 lbf = 4.445 kN).DTo convert the diameter (inches) to mm, multiply the inch value x 25.4.ETo convert from kcmil to mm2area, multiply the kcmil value x 5.067 x 10-4.B77903(2009)35. Requirement for Wires5
41、.1 Before stranding, the trapezoidal aluminum wires (seeTerminology B 354) shall conform to the requirements ofSpecification B 230/B 230M except for shape and diametertolerance. The tensile strength and elongation requirements oftrapezoidal wires shall be the same as for round wires of equalarea. Th
42、e area tolerances shall be such that the finishedconductor conforms to Section 12.5.2 Before stranding, the steel core wire shall meet therequirements of Specifications B 341/B 341M, B 498/B 498M,B 502, B 606, B 802/B 802M,orB 803, whichever is appli-cable.5.3 Following stranding, the steel core sha
43、ll meet therequirements of Specification B 500/B 500M.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(
44、Explanatory 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 ti
45、mes the 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 les
46、s than 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 laye
47、rbut the 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 la
48、yer of 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 aluminu
49、m cross-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, shall 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 manufact
