AerialGuard® 25 kV (Tree Wire and Spacer Cable) ACSR/AW (Concentric) 3-Layer Track-Resistant PE – ICEA S-121-733

A 3-layer system used on a tree wire or spacer cable, manufactured, tested and marked in accordance with ICEA S-121-733, the standard for Tree Wire and Messenger Supported Spacer Cable. This 3-layer system consists of a conductor shield (layer #1), followed by a 2-layer covering (layers #2 and #3). For further information, please contact American Wire Group.

APPLICATIONS

AerialGuard® Aerial Cable (tree wire and spacer cable) is intended for use in overhead primary and secondary distribution systems rated 15 kV (nominal) typically to prevent faults due to contact or where space is limited. The track resistant 3-layer system prevents short-circuits and flashovers in the case of contact with trees or wildlife. When installed correctly, this system is effective at preventing system outages, damage, or fires as a result of falling trees or branches.

 Tree Wire

When used in a tree wire power system, it is installed in a flat configuration, in a similar manner and spacing on insulators as with bare or covered overhead conductors. Self-supporting conductors, such as ACSR, are typical in this type of installation.

Spacer Cable

When used in a spacer cable power system, it is installed with a uniform spacing in a diamond configuration maintained by spacer hardware. The spacer and cable assembly are supported by a bare messenger, such as bare aluminum clad steel, ACSR, OPGW, or galvanized steel wire. Spacer cable assemblies occupy minimal space, requiring the narrowest of right of way or corridor.

CONSTRUCTION

Single cable with an ACSR/AW conductor, a 3-layer extruded shield and covering system, consisting of an extruded semiconducting thermoplastic conductor shield, and a 2-layer covering. The covering inner layer is a low-, medium- or high-density polyethylene (LDPE, MDPE or HDPE), while the outer layer is track-resistant medium- or high-density polyethylene (TK-MDPE or TK-HDPE). All layers are bonded together.

Conductor:
ACSR/AW (concentric stranded).
Conductor Shield:
Extruded semiconducting thermoplastic shield which is free stripping from the conductor and bonded to the covering.
Inner and Outer Covering:
2-layer low-, medium- or high-density polyethylene covering (LDPE, MDPE or HDPE), where the outer layer is track-resistant (TK-MDPE or TK-HDPE). All layers are bonded together. The outer layer shall be black or gray, sunlight resistant and track resistant.

*Operation at the emergency overload temperature shall not exceed:
a) 100 hours in any twelve consecutive months or 500 hours cumulative for tree wire, during the lifetime of the wire; or
b) 100 hours in any twelve consecutive months or 1500 hours cumulative for spacer cable, during the lifetime of the cable.

STANDARDS

These cables are manufactured and tested to meet or exceed the following standards:

• ASTM B230 – Aluminum 1350–H19 Wire for Electrical Purposes
• ASTM B231 – Concentric-Lay-Stranded Aluminum 1350 Conductors
• ASTM B502 – Aluminum-Clad Steel Core Wire for Use in Overhead Electrical Aluminum Conductors
• ASTM B549 – Concentric-Lay-Stranded Aluminum Conductors, Aluminum-Clad Steel Reinforced for Use in Overhead Electrical Conductors
• ASTM D1248 – Polyethylene Plastics Extrusion Materials for Wire and Cable
• ICEA S-121-733 – Tree Wire and Messenger Supported Spacer Cable

NOTES

1. Dimensions and weights are subject to standard manufacturing tolerances and are subject to change without notice.
2. Cables are manufactured, tested and marked to meet or exceed the requirements in ICEA S-121-733 for tree wire and messenger supported spacer cable suitable for installation and use in systems rated 25 kV.