Metal Hardware Overhead Network Selection for Use in Critical Regions at Coastal Aereas Using a Simplified Physical Model - Part II

Galvanized steel the hardware used by Brazilian utilities at networks close to coastal areas historically has an average life of approximately four years against the estimated 20 years when used in non-corrosive environment. The low average life of such hardware is justified by the salty air and the leakage current from the degradation of insulators. The last factor causes a huge accelerated and could be considered the main causative agent of low durability of such hardware. This paper presents the results of studies conducted for alternative materials selection can have a field average life of at least 15 years, making use of the new accelerated aging test methodology in a controlled environment which can reproduce main aggressions of the real and stimuli to which the hardware of the aerial networks of the Celesc experiment in field (simplified physical model), including presence of electric field, which results of its development are also presented here.