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Applying Eyring’s Model to “Times to Breakdown” of Insulating Fluid

Volume 8, Number 3, May 2012 - Paper 5 - pp. 279-288



Fluminense Fed. University, Civil Engineering Dept., Grad. Program, Niterói, RJ, Brazil and North Fluminense State University, Industrial Engineering Dept., Campus, RJ, Brazil

(Received on October 28, 2010 and revised on February 12, 2012)


In this paper the test purpose will have two objectives: First will be to verify if times to breakdown of insulating fluid between electrodes recorded at three different voltages have an exponential distribution as predicted by theory. Second will be to assess whether or not the accelerated model proposed by Eyring will be able to translate results for the shape and scale parameters of an underlying Inverse Weibull model, obtained under two accelerating using conditions, to expected normal using condition results for these two parameters. The product being analyzed is a new type of insulate fluid, and the accelerating factor is the voltage stresses applied to the fluid at two different levels (30KV and 40KV). The normal operating voltage is 25KV and it was possible to test the fluid at normal voltage using condition. Both results for the two parameters of the Inverse Weibull model, obtained under normal using condition and translated from accelerated using conditions to normal conditions, will be compared to each other to assess the accuracy of the Eyring model when the accelerating factor is only the voltage stress.


References: 08

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