Waluyo, and Saodah, Siti and Rohana, (2018) Investigation of Transformer Losses and Temperature Rise. Electrotehnică, Electronică, Automatică (EEA), 66 (2). pp. 37-44. ISSN 1582-5175

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Abstract

Power and distribution transformers are very important equipment in a power system. In an application, they experience heating, due to loading. The heating temperature rise has correlations to the loading current, power losses, efficiency and surface area. This research investigated some relations among the power losses, temperature rises, efficiency and the leading current, based on the measurements and empirical approach. The results indicated that the total power and the core losses would increase as the temperature rise increased too, with the average of 0.25 kW/oC and 0.30 kW/oC respectively. The output power increased as the temperature rise rose, as 6.4 kW/oC. Nevertheless, the efficiency would reduce as the temperature rise increased as the average of -6.41 %/oC. The temperature rise was dominantly caused by the power losses, rather than the loading power. By all means, the power losses were significantly depending on the loading power. Keywords: efficiency, empirical, loading, power loss, transformer, temperature rise

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