Question

Determine the Critical disruptive voltage.

Answer 1

$\huge\mathfrak{Answer}$

Critical Disruptive Voltage is defined as the minimum phase to neutral voltage required for the Corona discharge to start.

⭐ Calculation of Critical Disruptive Voltage ⭐

Suppose two conductors each of radius ‘r’ is separated by a distance ‘d’. If phase to neutral voltage is V then potential gradient ‘g’ at the surface of conductor is given as

g = V / [rlog(d/r)]

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