Visual Corona Inception Voltage Calculator

This Calctown Calculator calculates the visual corona inception voltage or critical disruptive voltage for the occurrence of visual corona.

r(radius of conductor)

D(distance between conductors)

p(pressure)

mm Hg

t(temperature)

deg C

m_v(surface irregularity factor)

unit

V_c(corona inception or critical disruptive voltage)

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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

m_v = surface irregularity or stranding factor

g_v = breakdown strength of air = 21.2 kV/cm