Corona Inception Voltage Calculator

Corona Inception Voltage Calculator

r(radius of conductor)

m

D(distance between conductors)

m

p(pressure)

mm Hg

t(temperature)

deg C

m₀(surface irregularity factor)

unit

CALCULATERESET

Result

V_c(Corona Inception Volatge)

kV

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where

 D = distance between conductors

 r = radius of conductors

 δ = air density correction factor

 p = pressure in Hg

 t = temperature in ⁰C

 V_c = corona inception or critical disruptive voltage

 m₀ = surface irregularity or stranding factor

 g₀ = breakdown strength of air = 21.2 kV/cm