Projeto de nova infraestrutura elétrica para escola municipal de Flores da Cunha : estudo de caso

Abstract

The events arising from irregularities in the electrical installations, such as those occurring in Ninho do Urubu, in Rio de Janeiro, and in the Mercado Público, located in Porto Alegre, make the theme highly visible in the national scene. The lack of follow up from electrical professionals, the non-compliance with the guidelines imposed for the elaboration of these projects, the lack of protective equipment and the mistaken division of loads in the circuits contribute to these problems to occur more frequently. In this scenario, this work aimed to develop the project of a new electrical infrastructure for the building where is located the Escola Municipal de Ensino Fundamental 1º de Maio, Flores da Cunha - RS. Through the study and understanding of the current norms related to the subjects, it was verified the necessity to elaborate a project of Protection Systems against Lightning through the calculation of the risk management and development of the projects, such as: grounding, approached by the TT method and verified through the Wenner arrangement, in order to determine the number of rods needed to supply the structure needs; lighting technique, approached by the lumen method, in order to determine the amount of luminaires needed for each room; electrical installations, covering the lifting of loads and demands, dimensioning of the conduits and conductors and circuit division. From these approaches, the total costs of the project implementation were verified and, therefore, an Energy Efficiency proposal was prepared, since the investment of R$ 147,776.21 is significant for the municipal coffers. Through the results obtained it was found that it is possible to insert new loads, enabling the implementation of refrigeration systems in the school, enjoy the benefits and reliability of the protection systems and reduce the installed power and energy consumption of the lighting system by more than 50%, which would result in a reduction of approximately R$ 9,300.00 annually in the electricity bill. In addition, it was possible to verify that the municipality may be able to participate in public calls, available annually (sic).