Huadong provide Aluminum conductor steel reinforced(ACSR) by U.S.A. standard - ASTM B232.
These conductors are formed by several wires of aluminum and
galvanized steel, stranded in concentric layers. The wire or wires
which form the core are made of galvanized steel and the external
layer or layers are of aluminum. Normally these conductors have a
Galvanized steel core of 1, 7, 19 or 37 wires, surrounded by
concentric layers of aluminum wires.
The diameters of the steel and aluminum wires can be alike or
different. By varying the relative proportions of aluminum and
steel ratios, the ideal conductor can be produced for any
particular application. In this way , if a high tensile strength
conductor is required, the number of steel wires can be increased
until the required strength is reached .
When a conductor with high current carrying capacity and a
comparatively low strength is required, this is attained with high
In comparison with copper, these conductors have considerable
technical and economical advantages in the installation of overhead
lines. Its characteristics, and low weight, combined with its high
break1ng strength, are gathered which makes it possible to have
large span runs, without having to revert to excessive mechanical
stresses or to heavy metallic Towers. Due to the greater diameter
of the conductors, electric losses by the corona Effect are greatly
reduced. By making use of these properties economical electric
energy transmission is attained at very high voltages and
(1).The permissible long-time operating temperature for aerial
conductor is 70oC.
(2).Under the circumstance that rare climate is occuring and ice
coverage rate low in heavy ice area,the biggest stress of cable at
the lowest point of the sag should not exceed 60% of the short-time
(3).When connecting conductors,the conductor beside the connecting
tube cant be prominent.Otherwise,the force on the operating
conductors will be unbalanced.After connectors are install,the
connecting tube should be painted by moisture-proof varnish in
order to protect it from corrosion.
(4).Under installaion,the arc downing stress of all the conductors
should be the same.With in the permissible distance of crossing
buildings or dropping to the ground,the stress can be 10-15% higher
than regular stress.
ACSR ASTM B232 Code name and specification data