Answer / k.prakashchandra

Nothing ,you can earth any polarity

1)Why potential transformer primary site grounded? 2)can be loop between neutral & body for grounding? 3)What is the difference between ELCB &RCCB? 4)Why we use iron core in transformer insted of wooden core? 5)what is the principle of excitation? 6)Why we test the core balance test for transformer? 7)what is creepage?What is the creepage length for insulators at different voltages? 8)How much type of relays used for differential protection of generator,transformer & busbar protection?

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what is difference between VAT & CST

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PLS MENTION QUESTIONS ASKED IN IOCL INTERVIEW FOR ELECTRICAL EGG??

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single phase brower fan with control starter. *problem is when operate it.It will be trip.

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what is the relative size of single and three phase?

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What magnetic circuit is formed in berry-type constructions and why?

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what is diff. b/w of earth & neutral?. why we are separately using ?

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For 280kw power. Which cable I can usr

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1)how many types of earth? 2)how many types of megger and how to select that range? how much time taken for megger calibration( we r using megger)

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why we use negative feedback in control system.

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