Answer / ravi

depending up on the number of windings in primary and in
secondary winding,we can calculate the CT and PT rating of
the transformer.
N2/N1=V2/V1

Answer / m u shetty

First we should know whether CT /PT is used for measurement
purpose or for protection ,primary currentand voltage
After getting the above details ,we can decide the
specification of CT/PT like accuracy
class,ratio,burden,type etc

Answer / nagarajan

OK BUT WE WANT MORE DETAILS WITH FORMULA ALSO

Answer / hanu1985

OK BUT CAN GIVE SOME MORE DETAILS FOR ME

Answer / chandrasen mourya

Its Basically the requirement of the client.
ie. The client operationg load along with consideration for
future loads. This gives you the power, now for the Volatge
& current we have to do a bit survey regarding which
voltage level is available in the vicinity & the availibity
of the same from the electricity board. This gives us the
Volatge rating & current is now calculated.
Now we have to see what protection are required & depending
on that we select the no of cores in both The CTS & PTS.

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