Análise dos aspectos construtivos na implantação de redes elétricas de média tensão em áreas rurais

Abstract

This paper analyzes the constructive aspects involved in the implementation of low and medium electrical voltage networks in rural areas, by using, as a case study, the construction of a 34.5 kV distribution line to supply a center- pivot irrigation system at Fazenda Monte Alegre Pindaíbas, located in the rural area of Rio Verde, Goiás, Brazil. This study describes in detail the main construction stages — staking, excavation, pole installation, hardware assembly, conductor stringing, equipment installation, and grounding system execution — evaluating conformity with the ABNT technical standards and Equatorial Energia Goiás specifications. The selected conductor was CAA 4/0 AWG (ACSR), and the calculated voltage drop along the 5 km line was 0.18%, well within the ±5% limit established by ANEEL PRODIST Module 8. The protection coordination study confirmed selective operation between the consumer substation relay (PEXTRON URPE 7104T) and the utility recloser (COOPER-FORM6). The grounding mesh design resulted in touch and step voltages of 52.35 V and 25.00 V, respectively, both significantly below the normative limits of 649 V and 2.104 V. The results demonstrate that rigorous technical compliance and careful construction planning are decisive factors for the reliability and safety of rural electrical infrastructure.