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Several efforts have been made over the past years to study the electrical, physical and chemicals properties of insulating oils. Among those efforts there is a property of natural aged oils (real oil samples corresponding to the scale of industrial transformers). This is investigated in this paper to determine the lifetime of naturally aged oil with different applied electric field and different shapes. This paper presents an experimental work to study the lifetime of transformer oil as a function of conduction current. In this paper, the electrification current in the tested oil is measured for different temperatures. Finally, tests have been carried out on oil samples under testing with different services period to determine the relation between breakdown voltage and the oil lifetime under uniform and nonuniform fields.

An Experimental Study to Determine the Life Time of Naturally Aged Transformer Oil