Trapezoidal Aluminum Conductor, Reinforced Steel Core

ACSS/TW is a conductor consisting of concentrically twisted trapezoidal aluminum filaments. A twisted steel core in the center of the conductor with one or more layers of 1350-O aluminum with a minimum conductivity of 63% twisted around the core. Corrosion protected steel core, galvanized with 5% aluminum-rare earth alloy, with standard, high force, super high, extra high and aluminum coated steel can be used.

Application

Aluminum conductor steel supported (ACSS) cable is used for overhead transmission lines. ACSS is designed to operate continuously at higher temperatures up to 2500C without loss of strength, which allows for a significant increase in current carrying capacity over ACSR. ACSS is self- damping, sags less than ACSR under emergency electrical loadings, and its final sags are not affected by the long term creep of aluminum. These advantages make ACSS useful in new line applications where structures can be optimized due to the reduced conductor sag or where high emergency loads may be required; or in lines where Aeolian vibration is a problem. Existing lines can be re-conductored using ACSS to allow for increased current using the existing clearances and tensions.