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Question

Which one of the followings does not have an effect on corona?

A.

Spacing between conductors

B.

Conductor size

C.

Line voltage

D.

Length of conductor

Answer ( Option D)

Length of conductor

Solution

Corona effect does not depend on length of conductor.


Where,

Air density factor

  = Radius of conductor in meter

r =  Spacing between conductors

D = Supply frequency

V = Phase voltage in kV

Vd = Disruptive critical voltage 

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