Answer / meenakshi

transformer oil is a mineral based oil that should have an excellent dielectric breakdown stength which makes it to withstand the electical stresses.its bond or interfacial tension is so strong that it does not give way for conduction till a particular limit of high voltage.main properties of a transformer oil is dielectric breakdown strength,acid number,colour,presence of water and interfacial tension

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an amazing situation was faced when an alive distribution panel with 415 volts and carrying almost 200Amps has become short and this metal cubical showing 220 volts against neutral and earth. to redress any confusion i checked the panel with help of single 200watts test lamp which also glowing with max.intensity b/w neutral & metal body of DB. amazing situation is that i hold the DB firmly more than once with necked foot means without insulated shoes but not received any electrical shock. whereas our all running gen sets neutral points also proper grounded and this short DB was completely earthed , this is beyond my understanding . any body explain how is it possible . our running gen set neutral also grounded firmly

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