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DYNA

versão impressa ISSN 0012-7353

Resumo

MAGO-RAMOS, María Gabriela et al. Method for determining total losses in distribution transformers from the percentage of carbon silicon steel sheet. Dyna rev.fac.nac.minas [online]. 2016, vol.83, n.198, pp.148-153. ISSN 0012-7353.  http://dx.doi.org/10.15446/dyna.v83n198.51620.

Transformers are electrical devices that are responsible for the distribution and management of electrical power. In Latin America the recycling of silicon steel sheet transformer is very common and therefore its construction is very important because we must consider the losses that may occur by eddy currents and magnetic hysteresis especially when the team has operated under load condition. This paper proposes a novel method to determine the total losses in the single-phase distribution transformers Pole, analyzing the percentage of carbon silicon steel sheet and chemical characteristics. This diagnostic checks the iron losses in proportion to the square of the frequency induction and also applying the formula Steinmentz order to perform diagnosis and failure prediction. Although the results have approximation errors are useful for diagnosis and reuse of the silicon steel sheet, since changes in the microstructure (grain size in the nanometer scale) or ratio are significant quality B-H The contribution to the manufacturers and the industry in general is exegetical, because if they are considered the values set the standard for equipment operating under this condition, the service conditions are improved distribution networks and consequently, reliability and / or maintenance in electric utilities.

Palavras-chave : Total losses; distribution transformer; silicon steel sheet.

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