GSW-Galvanized Steel Wire/Strand
Bare concentric-lay-stranded conductors are made from bare, hard-drawn, round, aluminum clad steel wires for general use of electrical purposes. Tensile strength and zinc-clad of steel wire have different grades.
Application
The galvanized single steel wires or stranded steel wires are suitable for cores of ACSR to improve its tensile strength. And they can also be used in the aerial transmission line as the line material of ground connection to avoid the lightning strike.
Description
Bare concentric-lay-stranded conductors are made from bare, hard-drawn, round, aluminum clad steel wires for general use of electrical purposes. Tensile strength and zinc-clad of steel wire have different grades.
Specification
● IEC 61089 Round Wire Concentric Lay Overhead Electrical Stranded Conductors
● ASTM A 475 Zinc-Coated Steel Wire Strand
● BS 183 General Purpose Galvanized Steel Wire Strand
● AS 1222.1 Steel Conductors and Stays—Bare overhead Part 1: Galvanized (SC/GZ)
● GB/T 1179 Round Wire Concentric Lay Overhead Electrical Stranded Conductors
Technical Parameter
GSW
Note:Class A and Class B and Class C are in same structure.
| Nominal diameter of strand | Number of Wires in Strand | Nominal Diameter of Coated Wire in Strand | Approx. weight of strand | Minimun Breaking Strength of Strand | |||||
| Utilities Grade | Common Grade | Siemens- Martin Grade | High- Strength Grade | Extra-high Strength Grade | |||||
| In. | mm | mm | kg/km | kN | kN | kN | kN | kN | |
| 1/8 | 3.18 | 7 | 1.04 | 48 | – | 2.402 | 4.048 | 5.916 | 8.140 |
| 5/32 | 3.97 | 7 | 1.32 | 76 | – | 3.870 | 6.539 | 9.519 | 13.078 |
| 3/16 | 4.76 | 7 | 1.57 | 109 | – | 5.115 | 8.452 | 12.677 | 17.748 |
| 3/16 | 4.76 | 7 | 1.65 | 119 | 10.676 | – | – | – | – |
| 7/32 | 5.56 | 3 | 2.64 | 131 | – | 6.228 | 10.409 | 15.569 | 21.796 |
| 7/32 | 5.56 | 7 | 1.83 | 146 | – | 6.850 | 11.387 | 17.126 | 24.020 |
| 1/4 | 6.35 | 3 | 3.05 | 174 | 14.012 | 8.274 | 13.523 | 21.040 | 29.981 |
| 1/4 | 6.35 | 3 | 3.05 | 174 | 20.017 | – | – | – | – |
| 1/4 | 6.35 | 7 | 2.03 | 180 | – | 8.452 | 14.012 | 21.129 | 29.581 |
| 9/32 | 7.14 | 3 | 3.30 | 204 | – | 9.252 | 15.035 | 23.398 | 33.362 |
| 9/32 | 7.14 | 7 | 2.36 | 244 | 20.462 | 11.432 | 18.905 | 28.469 | 39.812 |
| 5/16 | 7.94 | 3 | 3.68 | 255 | 28.913 | 11.076 | 18.193 | 28.246 | 40.479 |
| 5/16 | 7.94 | 7 | 2.64 | 305 | – | 14.234 | 23.798 | 35.586 | 49.820 |
| 5/16 | 7.94 | 7 | 2.77 | 335 | 26.689 | – | – | – | – |
| 3/8 | 9.52 | 3 | 4.19 | 328 | 37.810 | 14.813 | 24.732 | 37.187 | 52.489 |
| 3/8 | 9.52 | 7 | 3.05 | 407 | 51.155 | 18.905 | 30.915 | 48.040 | 68.503 |
| 7/16 | 11.11 | 7 | 3.68 | 595 | 80.068 | 25.355 | 41.591 | 64.499 | 92.523 |
| 1/2 | 12.70 | 7 | 4.19 | 770 | 111.206 | 32.917 | 53.823 | 83.627 | 119.657 |
| 1/2 | 12.70 | 19 | 2.54 | 751 | – | 33.895 | 56.492 | 84.961 | 118.768 |
| 9/16 | 14.29 | 7 | 4.78 | 1000 | – | 42.703 | 69.837 | 108.981 | 155.688 |
| 9/16 | 14.29 | 19 | 2.87 | 949 | – | 42.881 | 71.616 | 107.202 | 149.905 |
| 5/8 | 15.88 | 7 | 5.26 | 1211 | – | 51.599 | 84.961 | 131.667 | 188.605 |
| 5/8 | 15.88 | 19 | 3.18 | 1186 | – | 48.930 | 80.513 | 124.995 | 178.819 |
| 3/4 | 19.05 | 19 | 3.81 | 1721 | – | 71.172 | 116.543 | 181.487 | 259.331 |
| 7/8 | 22.22 | 19 | 4.50 | 2356 | – | 97.416 | 159.691 | 248.211 | 354.523 |
| 1 | 25.40 | 19 | 5.08 | 3089 | – | 127.664 | 209.066 | 325.610 | 464.839 |
| 1 | 25.40 | 37 | 3.63 | 3065 | – | 125.885 | 205.508 | 319.827 | 456.832 |
| 1 1/8 | 28.58 | 37 | 4.09 | 4010 | – | 160.136 | 262.000 | 407.457 | 581.827 |
| 1 1/4 | 31.75 | 37 | 4.55 | 4840 | – | 198.391 | 324.720 | 505.318 | 721.502 |
Note:Class A and Class B and Class C are in same structure.
GSW
| Construction Number of wires/wire diameter | Approximate strand diameter | Minimum breaking load of strand | Approx. mass | ||||||
| Grade 350 | Grade 480 | Grade 700 | Grade 850 | Grade 1000 | Grade 1150 | Grade 1300 | |||
| mm | kN | kN | kN | kN | kN | kN | kN | kg/1000 m | |
| 3/1.80 | 3.9 | 2.65 | 3.66 | — | — | — | — | — | 60 |
| 3/2.65 | 5.7 | 5.80 | 7.95 | — | — | — | — | — | 130 |
| 3/3.25 | 7.0 | 8.70 | 11.95 | — | — | — | — | — | 195 |
| 3/4.00 | 8.6 | 13.20 | 18.10 | — | — | — | — | — | 295 |
| 4/1.80 | 4.4 | 3.55 | 4.90 | — | — | — | — | — | 80 |
| 4/2.65 | 6.4 | 7.70 | 10.60 | — | — | — | — | — | 172 |
| 4/3.25 | 7.9 | 11.60 | 15.90 | — | — | — | — | — | 260 |
| 4/4.00 | 9.7 | 17.60 | 24.10 | 35.20 | — | — | — | — | 390 |
| 5/1.50 | 4.1 | 3.10 | 4.24 | 6.18 | — | — | — | — | 69 |
| 5/1.80 | 4.9 | 4.45 | 6.10 | 8.90 | — | — | — | — | 95 |
| 5/2.65 | 7.2 | 9.65 | 13.25 | 19.30 | — | — | — | — | 220 |
| 5/3.25 | 8.8 | 14.50 | 19.90 | 29.00 | — | — | — | — | 320 |
| 5/4.00 | 10.8 | 22.00 | 30.15 | 43.95 | — | — | — | — | 490 |
| 7/0.56 | 1.7 | 0.60 | 0.83 | 1.20 | — | 1.70 | 1.98 | 2.24 | 14 |
| 7/0.71 | 2.1 | 0.97 | 1.33 | 1.94 | — | 2.75 | 3.19 | 3.60 | 28 |
| 7/0.85 | 2.6 | 1.39 | 1.90 | 2.80 | — | 3.95 | 4.57 | 5.15 | 31 |
| 7/0.90 | 2.7 | 1.55 | 2.14 | 3.10 | — | 4.45 | 5.12 | 5.80 | 35 |
| 7/1.00 | 3.0 | 1.92 | 2.64 | 3.85 | — | 5.50 | 6.32 | 7.15 | 43 |
| 7/1.25 | 3.8 | 3.01 | 4.10 | 6.00 | — | 8.55 | 9.88 | 11.15 | 67 |
| 7/1.40 | 4.2 | 3.75 | 5.17 | 7.54 | 9.16 | 10.75 | 12.35 | 14.00 | 84 |
| 7/RSa | 4.3 | 3.85 | 5.28 | 7.70 | 9.35 | 11.00 | 12.65 | 14.30 | 86 |
| 7/1.60 | 4.8 | 4.90 | 6.75 | 9.85 | 11.95 | 14.10 | 16.20 | 18.30 | 110 |
| 7/1.80 | 5.4 | 6.23 | 8.55 | 12.45 | — | 17.80 | 20.50 | 23.20 | 140 |
| 7/2.00 | 6.0 | 7.70 | 10.55 | 15.40 | — | 22.00 | 25.30 | 28.60 | 170 |
| 7/2.36 | 7.1 | 10.70 | 14.70 | 21.40 | — | 30.60 | 35.20 | 39.80 | 240 |
| 7/2.65 | 8.0 | 13.50 | 18.50 | 27.00 | — | 38.60 | 44.40 | 50.20 | 300 |
| 7/3.00 | 9.0 | 17.30 | 23.75 | 34.65 | — | 49.50 | 56.90 | 64.30 | 392 |
| 7/3.15 | 9.5 | 19.10 | 26.20 | 38.20 | — | 54.55 | 62.75 | 70.90 | 430 |
| 7/3.25 | 9.8 | 20.30 | 27.85 | 40.65 | — | 58.05 | 66.80 | 75.50 | 460 |
| 7/3.65 | 11.0 | 25.60 | 35.15 | 51.25 | — | 73.25 | 84.20 | 95.20 | 570 |
| 7/4.00 | 12.0 | 30.90 | 42.20 | 61.60 | — | 88.00 | 101.0 | 114.0 | 690 |
| 7/4.25 | 12.8 | 34.75 | 47.65 | 69.50 | — | 99.30 | 114.0 | 129.0 | 780 |
| 7/4.75 | 14.0 | 43.40 | 59.45 | 86.80 | — | 124.0 | 142.7 | 161.3 | 970 |
| 19/1.00 | 5.0 | 5.22 | 7.16 | 10.45 | — | 14.92 | 17.16 | 19.40 | 120 |
| Construction Number of wires/wire diameter | Approximate strand diameter | Minimum breaking load of strand | Approx. mass | ||||||
| Grade 350 | Grade 480 | Grade 700 | Grade 850 | Grade 1000 | Grade 1150 | Grade 1300 | |||
| mm | kN | kN | kN | kN | kN | kN | kN | kg/1000 m | |
| 19/1.25 | 6.3 | 8.16 | 11.19 | 16.32 | — | 23.32 | 26.81 | 30.31 | 180 |
| 19/1.40 | 7.0 | 10.24 | 14.04 | 20.47 | — | 29.25 | 33.64 | 38.02 | 230 |
| 19/1.60 | 8.0 | 13.37 | 18.34 | 26.75 | — | 38.20 | 43.93 | 49.66 | 300 |
| 19/2.00 | 10.0 | 20.90 | 28.65 | 41.78 | 50.74 | 59.69 | 68.64 | 77.60 | 470 |
| 19/2.50 | 12.5 | 32.65 | 44.80 | 65.29 | 79.28 | 93.27 | 107.3 | 121.3 | 730 |
| 19/3.00 | 15.0 | 47.00 | 64.50 | 94.00 | 114.1 | 134.3 | 154.5 | 174.6 | 1050 |
| 19/3.55 | 17.8 | 65.80 | 90.27 | 131.6 | 159.9 | 188.0 | 216.3 | 244.5 | 1470 |
| 19/4.00 | 20.0 | 83.55 | 114.6 | 167.1 | 203.0 | 238.7 | 274.6 | 310.4 | 1870 |
| 19/4.75 | 23.8 | 117.85 | 161.6 | 235.7 | 286.0 | 336.7 | 387.2 | 437.7 | 2630 |
| a The construction of this strand consists of six wires of 1.40 mm diameter on a centre wire of 1.50 mm diameter. The diameter of the centre wire shall not be less than 0.08 mm nor more than 0.12 mm greater than the diameter of the outer wire. | |||||||||
GSW (SC/GZ）
| Standing and wire diameter | Approx. overall diameter | Cross-section area | Approx. mass per km | Calculated breaking load (CBL) | Equivalent aluminium area | Typical d.c. resistance per km at 20°C |
| mm | mm | mm² | kg | kN | mm² | Ω |
| 3/2.00 | 4.31 | 9.426 | 74 | 11.7 | 1.4 | 20 |
| 3/2.75 | 5.93 | 17.82 | 140 | 22.2 | 2.6 | 11 |
| 7/2.00 | 6.00 | 21.99 | 173 | 26.0 | 3.2 | 8.7 |
| 7/2.75 | 8.25 | 41.58 | 328 | 49.0 | 6.1 | 4.6 |
| 7/3.25 | 9.75 | 58.07 | 458 | 68.7 | 8.6 | 3.3 |
| 7/3.75 | 11.3 | 77.28 | 609 | 91.3 | 11 | 2.5 |
| 19/2.00 | 10.0 | 59.70 | 473 | 70.5 | 8.8 | 3.2 |
| 19/2.75 | 13.8 | 112.9 | 894 | 133 | 17 | 1.7 |
| 19/3.25 | 16.3 | 157.6 | 1250 | 186 | 23 | 1.2 |
GSW
| Code Number | Area mm² | Number of wires | Diameter mm | Linear Mass kg/km | Rated strength kN | DC resistance Ω/km | |||||
| Wire | Cond. | JG1A | JG2A | JG3A | JG4A | JG5A | |||||
| 10 | 10.8 | 7 | 1.40 | 4.20 | 84.8 | 14.44 | 15.62 | 17.46 | 20.15 | 21.12 | 17.9754 |
| 15 | 17.8 | 7 | 1.80 | 5.40 | 140.1 | 23.87 | 25.83 | 28.86 | 33.31 | 34.91 | 10.8740 |
| 20 | 22.0 | 7 | 2.00 | 6.00 | 173.0 | 29.47 | 31.89 | 35.63 | 41.12 | 43.10 | 8.8079 |
| 25 | 26.6 | 7 | 2.20 | 6.60 | 209.3 | 35.66 | 38.58 | 43.11 | 49.76 | 52.15 | 7.2793 |
| 35 | 37.2 | 7 | 2.60 | 7.80 | 292.4 | 48.69 | 52.40 | 59.09 | 67.64 | 70.99 | 5.2118 |
| 40 | 38.2 | 19 | 1.60 | 8.00 | 301.9 | 51.19 | 55.39 | 61.89 | 71.44 | 74.88 | 5.0939 |
| 50 | 49.5 | 7 | 3.00 | 9.00 | 389.2 | 64.82 | 69.77 | 78.67 | 90.05 | 94.51 | 3.9146 |
| 50 | 48.3 | 19 | 1.80 | 9.00 | 382.1 | 64.79 | 70.11 | 78.33 | 90.41 | 94.76 | 4.0248 |
| 55 | 56.3 | 7 | 3.20 | 9.60 | 442.9 | 72.62 | 79.38 | 87.26 | 99.65 | 105.3 | 3.4406 |
| 60 | 59.7 | 19 | 2.00 | 10.0 | 471.7 | 79.98 | 86.55 | 96.70 | 111.6 | 117.0 | 3.2601 |
| 65 | 67.3 | 7 | 3.50 | 10.5 | 529.8 | 86.88 | 94.96 | 104.4 | 119.2 | 125.9 | 2.8761 |
| 70 | 72.2 | 19 | 2.20 | 11.0 | 570.8 | 96.78 | 104.73 | 117.00 | 135.1 | 141.6 | 2.6943 |
| 75 | 74.4 | 37 | 1.60 | 11.2 | 589.4 | 99.7 | 107.9 | 120.5 | 139.1 | 145.8 | 2.6225 |
| 80 | 79.4 | 7 | 3.80 | 11.4 | 624.5 | 102.4 | 109.6 | 120.7 | 136.5 | 144.5 | 2.4399 |
| 80 | 78.9 | 19 | 2.30 | 11.5 | 623.9 | 103.4 | 111.3 | 125.5 | 143.7 | 150.8 | 2.4651 |
| 90 | 88.0 | 7 | 4.00 | 12.0 | 692.0 | 113.5 | 121.4 | 133.7 | 151.3 | 160.1 | 2.2020 |
| 95 | 94.8 | 19 | 2.52 | 12.6 | 748.9 | 124.14 | 133.62 | 150.68 | 172.5 | 181.0 | 2.0535 |
| 100 | 101 | 19 | 2.60 | 13.0 | 797.2 | 132.1 | 142.2 | 160.4 | 183.6 | 192.7 | 1.9291 |
| 115 | 116 | 37 | 2.00 | 14.0 | 921.0 | 155.8 | 168.5 | 188.3 | 217.4 | 227.8 | 1.6784 |
| 125 | 125 | 19 | 2.90 | 14.5 | 991.8 | 164.4 | 177.0 | 199.5 | 228.4 | 239.7 | 1.5506 |
| 150 | 153 | 19 | 3.20 | 16.0 | 1207.6 | 197.1 | 215.5 | 236.9 | 270.5 | 285.7 | 1.2735 |
| 155 | 154 | 37 | 2.30 | 16.1 | 1218.0 | 201.4 | 216.8 | 244.4 | 279.8 | 293.6 | 1.2691 |
| 185 | 183 | 19 | 3.50 | 17.5 | 1444.7 | 235.8 | 257.8 | 283.3 | 323.6 | 341.8 | 1.0645 |
| 200 | 196 | 37 | 2.60 | 18.2 | 1556.5 | 257.3 | 277.0 | 312.3 | 357.5 | 375.2 | 0.9931 |
| 240 | 239 | 19 | 4.00 | 20.0 | 1886.9 | 308.0 | 329.5 | 362.9 | 410.7 | 434.5 | 0.8150 |
| 245 | 244 | 37 | 2.90 | 20.3 | 1936.4 | 320.2 | 344.6 | 388.6 | 444.8 | 466.8 | 0.7983 |
| 300 | 298 | 37 | 3.20 | 22.4 | 2357.7 | 383.9 | 419.6 | 461.2 | 526.7 | 556.5 | 0.6556 |
| 355 | 356 | 37 | 3.50 | 24.5 | 2820.5 | 459.2 | 501.9 | 551.8 | 630.1 | 665.7 | 0.5480 |
| 465 | 465 | 37 | 4.00 | 28.0 | 3683.9 | 599.8 | 641.6 | 706.7 | 799.7 | 846.2 | 0.4196 |
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