该导线加入了合金成分（镁和硅两种元素）铝镁硅合金导线的特点是抗拉强度高，其抗拉强度约为电工硬铝线的1.8～2倍。电阻率则略高于电工铝。
铝镁硅系铝合金线是架空送电导线的理想材料.用它制成的钢芯铝合金绞线,重量轻,强度高,弧垂小,线路造价低.从高海拔大跨越重冰线路的实际应用证明,在特大冰雪考验下,也未发生覆冰断线事故.根据钢芯铝合金绞线与钢芯铝绞线的技术经济性分析对比,可见钢芯铝合金绞线在高压输电线路中的应用,特别是在大跨越的江湖湖泊或天气复杂恶劣的冰雪、重冰雪线路中的应用,有着广阔的发展前景.
钢芯铝合金绞线参数表：
|
标称截面 |
根数/直径 |
面积 |
绞线 外径 |
单位长度质量 |
额定抗拉力 kN |
直流电阻20℃ |
|||||
|
铝 |
钢 |
铝 |
钢 |
总和 |
JLHA1 |
||||||
|
No./mm |
mm2 |
mm |
kg/km |
G1A |
G3A |
EST |
Ω/km |
||||
|
150/8 |
18/3.20 |
1/3.20 |
144.76 |
8.04 |
152.80 |
16.00 |
461 |
55.90 |
58.15 |
59.51 |
0.2311 |
|
150/20 |
24/2.78 |
7/1.85 |
145.68 |
18.82 |
164.50 |
16.67 |
549 |
69.36 |
74.63 |
76.51 |
0.2301 |
|
185/10 |
18/3.60 |
1/3.60 |
183.22 |
10.18 |
193.40 |
18.00 |
584 |
68.91 |
71.35 |
72.98 |
0.1826 |
|
185/25 |
24/3.15 |
7/2.10 |
187.04 |
24.25 |
211.29 |
18.90 |
706 |
89.15 |
95.94 |
98.37 |
0.1792 |
|
185/30 |
26/2.98 |
7/2.32 |
181.34 |
29.59 |
210.93 |
18.88 |
732 |
92.67 |
100.66 |
104.80 |
0.1850 |
|
210/10 |
18/3.80 |
1/3.80 |
204.14 |
11.34 |
215.48 |
19.00 |
650 |
76.78 |
79.50 |
81.32 |
0.1639 |
|
210/25 |
24/3.33 |
7/2.22 |
209.02 |
27.10 |
236.12 |
19.98 |
789 |
99.63 |
107.22 |
109.93 |
0.1604 |
|
210/35 |
26/3.22 |
7/2.50 |
211.73 |
34.36 |
246.09 |
20.38 |
853 |
107.98 |
117.26 |
122.07 |
0.1584 |
|
210/50 |
30/2.98 |
7/2.98 |
209.24 |
48.82 |
258.06 |
20.86 |
960 |
123.66 |
136.84 |
143.68 |
0.1603 |
|
240/30 |
24/3.60 |
7/2.40 |
244.29 |
31.67 |
275.96 |
21.60 |
922 |
113.05 |
121.60 |
126.04 |
0.1372 |
|
240/40 |
26/3.42 |
7/2.66 |
238.85 |
38.90 |
277.75 |
21.66 |
964 |
121.97 |
132.47 |
137.92 |
0.1405 |
|
240/55 |
30/3.20 |
7/3.20 |
241.27 |
56.30 |
297.57 |
22.40 |
1107 |
140.34 |
156.10 |
165.68 |
0.1392 |
|
300/15 |
42/3.00 |
7/1.67 |
296.88 |
15.33 |
312.21 |
23.01 |
940 |
114.43 |
118.72 |
120.25 |
0.1130 |
|
300/20 |
45/2.93 |
7/1.95 |
303.42 |
20.91 |
324.33 |
23.43 |
1001 |
123.07 |
128.92 |
131.01 |
0.1106 |
|
300/25 |
48/2.85 |
7/2.22 |
306.21 |
27.10 |
333.31 |
23.76 |
1058 |
131.22 |
138.81 |
141.52 |
0.1096 |
|
300/40 |
24/3.99 |
7/2.66 |
300.09 |
38.90 |
338.99 |
23.94 |
1132 |
138.87 |
149.38 |
154.82 |
0.1117 |
|
300/50 |
26/3.83 |
7/2.98 |
302.68 |
48.82 |
351.50 |
24.26 |
1210 |
150.01 |
163.20 |
170.03 |
0.1120 |
|
300/70 |
30/3.60 |
7/3.60 |
305.36 |
71.25 |
376.61 |
25.20 |
1401 |
174.57 |
191.67 |
203.07 |
0.1099 |
|
400/20 |
42/3.51 |
7/1.95 |
406.40 |
20.91 |
427.31 |
26.90 |
1286 |
152.48 |
158.33 |
160.42 |
0.0825 |
|
400/25 |
45/3.33 |
7/2.22 |
391.91 |
27.10 |
419.01 |
26.60 |
1294 |
159.07 |
166.66 |
169.37 |
0.0856 |
|
400/35 |
48/3.22 |
7/2.50 |
390.88 |
34.36 |
425.24 |
26.80 |
1348 |
166.21 |
175.49 |
180.30 |
0.0859 |
|
400/50 |
54/3.07 |
7/3.07 |
399.73 |
51.82 |
451.55 |
27.60 |
1510 |
186.91 |
201.42 |
210.23 |
0.0840 |
|
400/65 |
26/4.42 |
7/3.44 |
398.94 |
65.06 |
464.00 |
28.00 |
1610 |
197.23 |
215.45 |
226.51 |
0.0841 |
|
400/95 |
30/4.16 |
19/2.50 |
407.75 |
93.27 |
501.02 |
29.10 |
1858 |
234.77 |
259.95 |
273.01 |
0.0823 |
|
500/35 |
45/3.75 |
7/2.50 |
497.01 |
34.36 |
531.37 |
30.00 |
1641 |
195.73 |
205.01 |
209.82 |
0.0675 |
|
500/45 |
48/3.60 |
7/2.80 |
488.58 |
43.10 |
531.68 |
30.00 |
1687 |
203.04 |
214.68 |
220.71 |
0.0687 |
|
500/65 |
54/3.44 |
7/3.44 |
501.88 |
65.06 |
566.94 |
31.00 |
1896 |
234.68 |
252.89 |
263.95 |
0.0669 |
|
630/45 |
45/4.22 |
7/2.81 |
629.40 |
43.10 |
672.50 |
33.75 |
2078 |
247.70 |
259.50 |
265.55 |
0.0533 |
|
630/55 |
48/4.12 |
7/3.20 |
639.92 |
56.30 |
696.22 |
34.30 |
2208 |
263.50 |
279.27 |
288.84 |
0.0525 |
|
630/80 |
54/3.87 |
19/2.32 |
635.19 |
80.32 |
715.51 |
34.80 |
2386 |
291.65 |
313.34 |
324.58 |
0.0529 |
|
800/55 |
45/4.80 |
7/3.20 |
814.30 |
56.30 |
870.60 |
38.40 |
2689 |
318.43 |
334.20 |
343.77 |
0.0412 |
|
800/70 |
48/4.63 |
7/3.60 |
808.15 |
71.25 |
879.40 |
38.60 |
2790 |
332.95 |
350.05 |
361.45 |
0.0415 |
|
800/100 |
54/4.33 |
19/2.60 |
795.17 |
100.90 |
896.07 |
39.00 |
2989 |
365.48 |
392.72 |
406.84 |
0.0422 |
