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AS 1222.2 Aluminum Clad Steel Conductor SC/AC Messenger Cable
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Application
Galvanized steel wire strands including Aluminum Clad Steel Conductor SC/AC are mostly employed in the electrical sector to support mechanical loads.
Additionally, it is utilized in Guy Wire, Overhead Ground or Static Wire, and Messenger Wire.
Characteristics
A minimum radial thickness of 5% of the overall wire diameter is used for the aluminum cladding on steel that has this coating. Its conductivity is 20.3% IACS and its UTS ranges from 1.27 to 1.34GPa.In comparison to conductors made with galvanized steel, those that use aluminum-clad steel as reinforcement have lower electrical resistance and offer higher corrosion resistance.
Packing
Delivery lengths are determined from a consideration of such factors as physical drum dimensions, drum weights, span length and handling equipment.
Construction
Galvanized steel wires are stranded concentrically, with the outermost layer being laid right-handed and the subsequent layers having the opposite direction of lay.
A conductor may incorporate a larger central wire (king wire) if necessary. This wire's diameter is typically 5% bigger than the nearby wires and is based on conductor design concerns.
Specifications
-AS 1222.2 Standard Aluminium Clad Steel Standard
AS/NZS 1222.2 Standard Aluminum Clad Steel Conductor SC/AC Physical,Mechanical and Electrical Performance Parameters
|
No./Dia.of Stranding Wires |
Nominal Overall Diameter |
Cross Section Area |
Nominal Linear Mass
|
Breaking Load |
Modulus of Elasticity |
Coefficient of Linear Expansion |
D.C.Resistance |
Continuous current carrying capacity (A) |
||||||
|
at 20°C |
at 75°C |
at night in winter |
at noon in summer |
|||||||||||
|
No./mm |
mm |
mm2 |
kg/km |
kN |
GPa |
x 10–6/°C |
Ω/km |
Ω/km |
in air |
wind |
wind |
in air |
wind |
wind |
|
3/2.75 |
5.9 |
17.82 |
118 |
22.7 |
159 |
12.9 |
4.80 |
5.75 |
48 |
83 |
97 |
38 |
76 |
90 |
|
3/3.00 |
6.5 |
21.21 |
141 |
27.0 |
159 |
12.9 |
4.02 |
4.82 |
54 |
93 |
108 |
42 |
84 |
100 |
|
3/3.25 |
7.0 |
24.89 |
165 |
31.6 |
159 |
12.9 |
3.42 |
4.10 |
60 |
103 |
120 |
47 |
93 |
110 |
|
3/3.75 |
8.1 |
33.12 |
220 |
39.3 |
159 |
12.9 |
2.58 |
3.09 |
72 |
123 |
143 |
56 |
111 |
131 |
|
7/2.75 |
8.3 |
41.58 |
277 |
50.1 |
157 |
12.9 |
2.06 |
2.47 |
81 |
138 |
161 |
63 |
124 |
148 |
|
7/3.00 |
9.0 |
49.48 |
330 |
59.7 |
157 |
12.9 |
1.73 |
2.07 |
91 |
154 |
179 |
70 |
138 |
164 |
|
7/3.25 |
9.8 |
58.07 |
387 |
69.9 |
157 |
12.9 |
1.47 |
1.76 |
102 |
170 |
198 |
77 |
153 |
181 |
|
7/3.75 |
11.3 |
77.28 |
515 |
86.9 |
157 |
12.9 |
1.11 |
1.33 |
123 |
204 |
237 |
92 |
181 |
215 |
|
7/4.25 |
12.8 |
99.33 |
662 |
105 |
157 |
12.9 |
0.864 |
1.04 |
145 |
238 |
277 |
107 |
211 |
251 |
|
19/2.75 |
13.8 |
112.9 |
755 |
136 |
155 |
12.9 |
0.764 |
0.915 |
158 |
259 |
300 |
116 |
228 |
272 |
|
19/3.00 |
15.0 |
134.3 |
899 |
162 |
155 |
12.9 |
0.642 |
0.769 |
178 |
288 |
335 |
129 |
54 |
302 |
|
19/3.25 |
16.3 |
157.6 |
1060 |
189 |
155 |
12.9 |
0.545 |
0.653 |
200 |
320 |
371 |
142 |
280 |
334 |
|
19/3.75 |
18.8 |
209.8 |
1410 |
236 |
155 |
12.9 |
0.411 |
0.492 |
244 |
382 |
443 |
172 |
333 |
397 |
|
19/4.25 |
21.3 |
269.6 |
1800 |
286 |
155 |
12.9 |
0.320 |
0.383 |
291 |
448 |
519 |
203 |
387 |
462 |
Note
The electrical performance characteristics shown above do not take magnetic effects into consideration and are therefore only approximate.
Current ratings are based on the following conditions:
•Conductor temperature rise above ambient of 40°C
•Ambient air temp. of 35°C for summer noon or 10°C for winter night
•Direct solar radiation intensity of 1000 W/m2 for summer noon or zero for winter night
•Diffuse solar radiation intensity of 100 W/m2 for summer noon or zero for winter night
•Ground reflectance of 0.2
•Emissivity and solar absorption coefficient of the conductor surface, 0.5
