Metodologia para projetos elétricos de subestações aéreas. Estudo de caso: hospital

Abstract

In this work, a methodology for sizing a 300KVA overhead substation in a hospital was developed. It followed the standards CNC-OMBR-MAT-20-0942-EDBR (2022) and CNCOMBR-MAT-18-0126-EDCE (2022), in addition to Normative Resolution No. 1000 described in the local electric utility, Enel-Ceará, and the Agência Nacional de Energia Elétrica (ANEEL) for the sizing of the installed power, sizing the electrical protection components and the calculation of contracted demand. Throughout the work, the equipment that makes up the substation is presented, such as the transformer, lightning-arresters, insulators, electric distribution poles, protection and measurement devices, grounding, and others; the implementation, sizing, and approval processes were also presented. In addition, it was shown the step by step calculation of the installed load and contracted demand; the details of the required technical drawings, such as the situation plan and electrical diagrams; necessary documents, such as the descriptive memorial, ART/TRT and AVT; and the software used, such as AutoCad. In the end, one can see the importance of the electrical project for its approval and execution with the electric utility company Enel-Ceará.