In an experiment for determining the breakdown strength of transformer oil with standard electrodes, the following observations were obtained with two different types of oils (Oil A and Oil B). Oil A breakdown voltage is 165KV at 8mm gap spacing and for the same gap space Oil B break down Voltage is 0.140MV. For 16mm gap spacing, the breakdown voltage is 212 KV and for the same gap spacing, Oil B breakdown voltage is 200KV. Determine the power law for breakdown and hence estimate the breakdown strength for a 4 cm gap (kV/cm).

Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter3: Power Transformers
Section: Chapter Questions
Problem 3.10P: A single-phase step-down transformer is rated 13MVA,66kV/11.5kV. With the 11.5 kV winding...
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In an experiment for determining the breakdown strength of transformer oil with standard electrodes, the following observations were obtained with two different types of oils (Oil A and Oil B). Oil A breakdown voltage is 165KV at 8mm gap spacing and for the same gap space Oil B break down Voltage is 0.140MV. For 16mm gap spacing, the breakdown voltage is 212 KV and for the same gap spacing, Oil B breakdown voltage is 200KV. Determine the power law for breakdown and hence estimate the breakdown strength for a 4 cm gap (kV/cm).

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