Three Modes Of Electrical Corrosion Failure Of ADSS Cables

Most of the ADSS cables are used for the transformation of old line communications and are installed on the original pole towers. ADSS cables are an "addition" to the original pole towers, and the original pole towers were not designed to consider the addition of any other objects. Therefore, ADSS optical cables can only adapt to the original pole tower conditions and try to find limited installation space. These "spaces" mainly include: pole tower strength, spatial potential strength (spacing and position with the conductor) and spacing with the ground or crossing objects. Once these relationships are mismatched, ADSS cables are prone to various faults, the most important of which is electrical corrosion.

GL CABLES is a professional ADSS cable manufacturer with nearly 20 years of production experience. Today, we will briefly interpret the electrical corrosion faults of ADSS cables. Generally speaking, there are three types of breakdown, electrical traces and corrosion, which are collectively referred to as the three main phenomena of electrical corrosion. These three modes often have comprehensive failures at the same time as the hardware, and it is not easy to strictly distinguish them.

1. Breakdown

Due to various reasons, an arc with enough energy occurs on the surface of the ADSS fiber cable, generating enough heat to cause the cable sheath to break down. The breakdown usually produces a perforation with a molten edge. It is often accompanied by the simultaneous burning of the spunbond, which causes the cable strength to drop sharply, and the cable breaks when the tension cannot be maintained. Breakdown is a fault that occurs relatively soon after installation.

2. Tracking

The arc forms a radial (electric tree) carbonization channel on the surface of the sheath, which is called a tracking, and then continues to deepen. Under the action of tension, it cracks and exposes the spunbond, and sometimes converts to a breakdown mode. Tracking is a fault that occurs longer after installation than the breakdown mode.

3. Corrosion

Due to the heat generated by the leakage current through the sheath, the polymer slowly loses its bonding force and eventually fails. It is manifested in a rough surface and thinning of the sheath, a phenomenon called corrosion. Corrosion occurs slowly and is normal during the life of the adss fiber cable.