ACSS conductors are similar to conventional ACSR with some very important additional advantages. ACSS can operate continuously at high temperatures up to 250˚C without damage, allowing for a significant increase in conductor current-carrying capacity. ACSS sags less under emergency electrical loading than ACSR, it is self-damping, and its final sags are not affected by long-term creep of the aluminum.

1.improved conductivity

2.better self-damping property

3.very low sag at high temperature

4.high current carrying capacity

5.excellent immunity to vibration fatigue

6.long term creep of aluminum does not affect final sag

Aluminum Conductor Steel Supported (ACSS) is a composite concentric-lay stranded conductor with one or more layers of hard drawn and annealed 1350-0 aluminum wires on a central core of steel. In an ACSS, under normal operating conditions, the mechanical load is mainly derived from the steel core as aluminum in fully annealed stage does not contribute much towards the mechanical strength. Steel core wires are protected from corrosion by selecting an appropriate coating of the wire like galvanizing, mischmetal alloy coating or aluminum clad. The type of coating is selected to suit the environment to which the conductor is exposed and operating temperature of the conductor.