TransPowr® ACSS Bare Overhead Conductor (US)

TransPowr® ACSS Bare Overhead Conductor (US)
Product description

ACSS (Aluminum Conductor Steel Supported) is a type of composite cable featuring a concentric-layer stranded design. The conductors are produced in accordance with the latest version of ASTM B856 standards. At the center of the cable is a core made of steel strands, around which one or more layers of aluminum 1350-O wires are stranded. The "O" temper of the aluminum, which is fully annealed or soft, ensures that most or all of the mechanical load on the ACSS is supported by the steel core. 

Standard ACSS cables are constructed with a regular-strength Class A zinc-aluminum alloy-coated steel core (specifically, the /MA2 type), which contains 5% aluminum and mischmetal. The steel core can consist of 7, 19, or 37 wires, or even more, depending on the specific design requirements.

 

Features and Benefits

ACSS conductors are similar to conventional ACSR conductors, but they offer several significant advantages. ACSS can operate continuously at high temperatures up to 250 °C without sustaining damage, thereby increasing its current-carrying capacity. Additionally, ACSS experiences less sag under emergency electrical loads compared to ACSR. It is self-damping, meaning its final sag is not affected by long-term creep in the aluminum.

 

Applications

ACSS is utilized for overhead transmission lines. It is particularly beneficial in the following situations: reconductoring applications that require increased current with existing tensions and clearances; new line installations where structures can be optimized due to reduced sag; new line applications that need to handle high emergency loadings; and lines that experience issues with aeolian vibration.

 

Options

  • E3X® surface coating (/E3X)
  • High-strength Class A zinc-5% aluminum mischmetal alloy-coated steel core (/MA3 to ASTM B803)
  • Extra-high-strength Class A zinc-5% aluminum mischmetal alloy-coated steel core (/MA4 to ASTM B958)
  • Ultra-high-strength Class A zinc-5% aluminum mischmetal alloy-coated steel core (/MA5 to ASTM B958)
  • Aluminum-clad steel core (/AW)
  • 250°C operating temperature rating utilizing either the zinc-5% aluminum mischmetal alloy-coated steel core wires or the aluminum-clad steel core wires
  • Trapezoidal-shaped aluminum strands (/TW)Non-specular surface finish (/NS)
Product datasheet