Asian Journal of Scientific Research1992-14542077-2076Asian Network for Scientific Information10.3923/ajsr.2013.122.128MaizanaDina 1201361The study of eddy current loss has done much research and this research is to study the influence of eddy current which cause higher energy loss at higher frequencies of magnetization. This paper is about analyses of eddy current loss in 100 kVA 3 phase distribution transformer assembled with the mix 60°-0° T-joint and mitred lap corner joint with stagger yoke of 5 mm. The loss has been measured using no load test with variable frequency. The eddy current loss rises to be 39.1% when the transformer core is energized at flux density of 1.5 T and frequency of 55 Hz. increase of the frequency will cause the increase of power loss in the transformer core. It caused not all the flux flowing into the middle limb or other limb at difference instant in time of transformer core because there is still flux left in the area of butt-joint and the core loss that produced at the frequency more than 50 Hz will known as classical eddy current loss.]]>Maizana, D.,20112011Leite, J.V., D. Ferreira, M.V. Luz, N.D. Sadowski and P.A. Silva,201248895898Olivares-Galvan, J.C., R. Escarela-Perez, F. De Leon, E. Campero-Littlewood and C. Aviles Cruz,2010353339Zurek, S.,20052005Mthombeni, T.L.,20062006Mazurek, R., P. Marketos, A. Moses and J.N. Vincent,201046638641Schulz, C.A., D. Roger, S. Duchesne and J.N. Vincent,201046614617Le Bhan, Y.,200336297302Chandrasena, W., P.G. McLaren, U.D. Annakkage, R.P. Jayasinghe, D. Muthumuni and E. Dirks,200676634641Mayuri, R., N.R. Sinnou and K. Ilango,20102010pp: 15Liu, R., C.C. Mi and D.W. Gao,20084420212028Yao, X.G., A.J. Moses, J. Sagarduy and F.J. Anayi,20072007pp: 324329