Yahya, KhalidAttar, HaniIssa, HaithamRamadan Dofan, Jamal AliIqteit, Nassim A.Yahya, Adel E.M.Solyman, Ahmed Amin Ahmed2024-09-112024-09-1120232502-4752https://doi.org/10.11591/ijeecs.v30.i3.pp1297-1307https://hdl.handle.net/11363/8529This article explores the measurement of temperature in transient states, utilizing the principles of heat transfer and thermal-electrical metaphor. The study focuses on the nonlinear thermal resistances present in various locations within a distribution transformer, while taking into account variations in oil physical variables and temperature loss. Real-time data obtained from heat run tests on a 250-MVA-ONAF cooled unit, conducted by the transformer manufacturer, is used to verify the thermal designs. The observations are then compared to the loading framework of the IEC 60076-7:2005 system. The findings of this research provide a better understanding of temperature measurement in transient states, particularly in distribution transformers, and can be applied to the design and development of more efficient and reliable transformer systems. © 2023 Institute of Advanced Engineering and Science. All rights reserved.eninfo:eu-repo/semantics/openAccessDistribution transformer; Tehrmal-electrical metaphor; Temperature loss; Thermal resistance; Transient statesArticle3031297130710.11591/ijeecs.v30.i3.pp1297-13072-s2.0-85152103998Q3