Product Information

Specification

About:

Tree wire or covered open wire consists of the conductor (aluminum, aluminum alloy or ACSR ) and the extruded covering (conductor shield, low density inner layer and protective outer layer). Covering thickness depends on the system voltage. Itis designed for full span applications and is supported on polyethylene insulators. We also offer a two layer covered conductor design for 15kV systems that are not subject to heavy tree contact. Covered conductors are available in black or gray depending on visual preference.

Also Known As:

• Tree Wire or Covered Aerial Wire: Highlighting its use in environments where vegetation poses a risk to power lines.
• Spacer Cable: Indicating its application in systems where cables are spaced apart with spacers, often used in areas with dense foliage.

Application:

Hendrix provides tree wire designed for systems from 15kV through 46kV. Polyethylene insulators must be used to insure dielectric compatibility with conductor covering. Conductors are supported on crossarms or standoff brackets. Span lengths are limited by the conductor breaking strength and the amount of sag that is permissible. Covered conductors are rated for continuous operation at 75°C. (Consult Hendrix sales representative for 46kV tree wire systems).

Benefits:

• Covering prevents faults due to contact
• Proprietary, high density outer layer resists abrasion, electrical tracking and UV degradation.
• Reduced NESC phase spacing is possible due to high impulse strength covering.
• Pole hardware is the same as bare wire construction except that Hendrix polyethylene insulators are required.

Standards:

• ASTM B398: This standard specifies the requirements for Aluminum-Alloy 6201-T81 wire for electrical purposes.
• ANSI/ICEA S-76-474: It provides the specifications for neutral-supported power cable assemblies with weather-resistant extruded insulation for rated voltages of 5 kV to 46 kV.
• Additional standards may include specific regional or utility requirements that ensure compatibility and safety within particular power distribution networks.

Construction:

• Core: Aluminum alloy 6201-T81 conductors offer excellent electrical and mechanical properties.
• Insulation: A layer of polyethylene or cross-linked polyethylene provides electrical insulation and physical protection against environmental factors.
• Shielding: Concentrically arranged neutral wires form a shield around the insulated conductor, offering fault current path and enhancing mechanical strength.
• Jacket: An outer cover, usually made of polyethylene, provides additional protection against physical damage and weather elements.

Features:

• High tensile strength and good conductivity due to the aluminum alloy construction.
• Enhanced safety, as the insulated design prevents accidental contact with live parts.
• Resistance to environmental stress, including UV radiation, moisture, and temperature variations, ensuring longevity and reliability.
• Compatibility with existing infrastructure, allowing for upgrades or extensions without significant system modifications.

*Data provided on this page is subject to change based on different manufacturers' variances

** Images are for display purposes only refer to Product Technical Details for accurate information on the product.