Avaliação econômica do dimensionamento de condutores para alimentar motores elétricos de indução.

Abstract

This paper presents a comparative study between the technical and economic criteria for dimensioning conductors in three installations, as well as an alternative dimensioning, which is considered important when dimensioned according to the technical standard and below the limit of 120 mm². Installation 1 has four 125 hp motors as loads and is connected to the transformer by branch 1, installation 2 has three 20 hp motors as loads, being connected to the transformer by branch 2 and installation 3 has two motors as loads. 40 hp and two 500 hp engines, with branch 3 being the feeder conductor. To perform a comparison, using financial analysis tools, to assess the profitability of investments. From the results, it can be seen that the economic dimensioning is a viable tool to obtain increasingly efficient projects, although it does not stand out as a good investment alternative for the cases of mediumlarge installations, given the high initial investment. On the other hand, the proposed alternative dimensioning presents gains associated with the investment in all the evaluated installations.