Covered Conductor Systems (Spacer Cable and Tree wire) have been installed in a variety of environments over the last 70 years. It has been used to great advantage in numerous applications on seven continents and in over sixty countries. It is in the last 20+ years, however, that spacer cable usage has expanded to so-called “contaminated environments” and climates more severe than were originally anticipated. In certain cases, this has led to system failures.
The purpose of this paper is to categorize contaminants and the environments in which they arise, to review spacer cable performance in such environments, and to analyze lessons learned. Ultimately, the objective of this analysis was to create a design blueprint for the specification of aerial covered conductor systems and system components, along with preventative maintenance requirements, which will withstand these various contaminated environment challenges.
Sponsored By: Hendrix Aerial Cable Systems
Hendrix Aerial Cable Systems, headquartered in Milford, New Hampshire, supplies covered aerial cable systems to the electric utility, industrial, and renewable energy industries worldwide. Aerial Spacer Cable was invented by Bill Hendrix in 1951, and the company brings 70 years of experience, R&D, new product development, and innovation to the industry. Hendrix supplies both Aerial Spacer Cable and Tree Wire covered conductor systems, serving 15 kV, 25 kV, 35 kV, 46 kV, 69 kV, and 115 kV voltage systems. Our systems are installed in over 75 countries spanning all seven continents.