Answer / joseph vennel

There is no minimum value for BDV of a transformer oil. BDV of the oil represents the insulation level of the medium, in this case oil. More the BDV value the better. New Transformer oil has a typical BDV of 60 kV/mm.

Answer / arun.r

bdv value depend upon voltage ratting


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What is Vk and Imag i.e Knee point voltage & Magnetising Current? How to calculate above values? How to define accuracy class 5P10?

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Hello friends., my question is related to testing of current transformer... A Ct having knee point voltage of 750 volts., and I have two step up transformer's of rating 230 v to 440 volts., can I obtain the value of 750 volts by using the two transformer's.... If yes then how could I connect the transformer's to obtain knee point voltage?? thank you in advance

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