%0 Journal Article %A Ahmet Y. Arabul and Ibrahim Senol and Fatma Keskin Arabul and Mustafa G. Aydeniz and Yasemin Oner and Gokhan Kalkan %D 2015 %J International Journal of Energy and Power Engineering %B World Academy of Science, Engineering and Technology %I Open Science Index 104, 2015 %T An Investigation on Hot-Spot Temperature Calculation Methods of Power Transformers %U https://publications.waset.org/pdf/10003802 %V 104 %X In the standards of IEC 60076-2 and IEC 60076-7, three different hot-spot temperature estimation methods are suggested. In this study, the algorithms which used in hot-spot temperature calculations are analyzed by comparing the algorithms with the results of an experimental set-up made by a Transformer Monitoring System (TMS) in use. In tested system, TMS uses only top oil temperature and load ratio for hot-spot temperature calculation. And also, it uses some constants from standards which are on agreed statements tables. During the tests, it came out that hot-spot temperature calculation method is just making a simple calculation and not uses significant all other variables that could affect the hot-spot temperature. %P 1036 - 1040