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Question

Which one of the following statements is correct? Corona loss increases with

A.

Decrease in conductor size and increase in supply frequency.

B.

Increases in both conductor size and supply frequency.

C.

Decrease in both conductor size and supply frequency.

D.

Increase in conductor size and decrease in supply frequency.

Answer ( Option A)

Decrease in conductor size and increase in supply frequency.

Solution

As we know that, corona loss

Where V =  Phase voltage in kV (rms value)

 VD= Disruptive critical voltage

r =  Radius of conductor in meter

f= System frequency from above relation 


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