How to Choose: PE‑Sheath vs AT‑Tracking‑Resistant Sheath for ADSS Cables

A Guide for High‑Voltage Project Selection

ADSS (All‑Dielectric Self‑Supporting) fiber cables are widely deployed for power‑grid communication systems. When placing orders, many project buyers are confused between ordinary PE sheath and AT tracking‑resistant sheath. Wrong sheath selection may lead to sheath erosion, dry‑band arcing damage and premature failure, threatening the long‑term service life and operational safety of overhead optical‑fiber lines.

Core Differences Between the Two Sheath Materials

PE Sheath (Ordinary Polyethylene)

It delivers good UV‑resistance and ageing‑resistance at a competitive cost. However, standard PE material provides no tracking‑resistance against dry‑band arcing induced by high‑voltage electric‑field. Recommended application: Lines of 35 kV and below, locations with low electric‑field intensity and light pollution. For 35‑110 kV routes, an on‑site electric‑field calculation is required before PE‑sheath adoption.

AT Tracking‑Resistant Sheath

AT sheath is specially modified compound material. It effectively withstands dry‑band arcing corrosion under strong electric‑field, prevents sheath breakdown and greatly improves long‑term reliability in high‑voltage environments. Recommended application: 110 kV‑220 kV high‑voltage transmission lines, coastal salt‑fog zones, industrial heavily‑polluted and other high‑risk areas.

Quick‑Selection Guidelines

1. 35 kV and below distribution networks: PE‑sheath is the preferred cost‑effective option.

2. 110 kV and above transmission lines: AT tracking‑resistant sheath is mandatory. Ordinary PE sheath is not allowed.

3. 35‑110 kV routes: Carry out hanging‑point electric‑field evaluation. Upgrade to AT sheath for coastal, industrial or heavily‑polluted sites to avoid hidden corrosion risks.

4. Long‑span and mountain‑area projects: Assess local electric‑field conditions and consider higher‑grade sheath protection even for lower‑voltage circuits.

The outer sheath acts as the first‑line protection for ADSS cables. Proper material selection minimizes maintenance risks and guarantees stable communication for decades.

Our factory supplies a full range of ADSS optical cables with both PE and AT‑tracking‑resistant sheaths. Custom long‑span designs and electric‑field assessment support are available with strict factory testing. Feel free to contact us for your power‑cable project consultation and quotation.