High Voltage Engineering Experiment:5. Break-Down Voltage of Transformer Oil - Dr. T. G. Arora

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Exp.5: “To find the Break-Down Voltage of Transformer Oil” by Dr. T. G. Arora, Electrical Engineering Department, Shri Ramdeobaba College of Engineering and Management, Nagpur (India).
Transformer oil acts as a cooling medium as well as it provides insulation between winding & the body of the transformer. As it is acting as an insulating medium; it must have good dielectric strength. With time impurities are added and it undergoes aging process, hence its dielectric strength reduces. Two basic impurities in the transformer oil are moisture & solid impurities (sludge). Formation of sludge on the coil, windings & ducts reduces cooling efficiency considerably. Dielectric strength of the oil reduces by 20% due to 0.01% moisture in it. It is necessary to test the transformer oil time-to-time to know its dielectric strength/breakdown voltage.
Next Video: Fiber-Bridge Formation in Transformer Oil.

[@mdsarfarazhussain2872]

Tomorrow I have exam of Power system lab
Thank you sir for making this video
It really helped me to understand the experiment .

[@virendrasingh7779]

Nicely explained

[@jayeshpatil3792]

Nice sir

[@aparnabharbat5224]

Sir nagpur mai konse clg se ho

[@CHITRANJANKUMAR-et6xx]

Why oval shaped electrodes are used sir?

[@TGArora]

They are hemispherical electrodes. With this shape electric field is uniform.

[@s.r.murthy8054]

0to100kv transformer oil BDV test kit required MOTURAGED RATES