AVALIAÇÃO DA CONFORMIDADE NORMATIVA DO SISTEMA ELÉTRICO EM ESTAÇÕES ELEVATÓRIAS DE ESGOTO DE PEQUENO PORTE

Abstract

Sewage pumping stations play an essential role in basic sanitation, ensuring the proper transport of effluent when gravity flow is not possible. Safe and continuous operation depends on the correct integration of electromechanical subsystems such as pump sets, automation, protection, and grounding. However, studies indicate that small-scale pumping stations often present design and execution failures, compromising performance and increasing operational costs. Since electrical energy represents a significant portion of these costs, ensuring efficient designs becomes even more relevant. Thus, this study aims to carry out a technical and normative analysis of the electrical system of a small sewage pumping station, examining in a structured manner the elements that compose the project, the criteria adopted in its development, and the compliance of the proposed solutions with current standards. The methodology adopted is applied, technical-descriptive, and documentary in nature. Initially, a survey was conducted to identify the hydraulic, electrical, and urban parameters that influence the operation of the pumping station. Subsequently, the relevant Brazilian Technical Standards (NBR), such as NBR 5410, NBR 12208, and NBR 5419, were analyzed. In the following stage, sizing calculations were performed for conductors, conduits, and protective devices, as well as an assessment of the Grounding System and the Lightning Protection System (LPS). The results show that all stages of the electrical design complied with normative criteria, from defining the design currents presented in the load and demand tables to verifying voltage drop, cable ampacity, and compatibility between conductors and protective devices. The analysis also demonstrated that the grounding system and LPS were sized in accordance with normative requirements, ensuring safety, operational continuity, and protection of electromechanical equipment. It is concluded that the adopted methodology provides a solid foundation for the design of similar pumping stations, enabling the development of coherent, safe, and adequate technical solutions for the constructive and operational conditions.