Power transmission cables - Technologies. Features : Main electrical characteristics

Main electrical characteristics
Power transmission cables - Technologies. Features

Author : Michel PAYS

Publication date: December 10, 1994 | Lire en français

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4. Main electrical characteristics

4.1 Electric field

High- and extra-high-voltage power cables are generally either single-pole or three-pole with individual shielding. Under these conditions, the electric field E in the insulating jacket has only a radial component E _r, obtained by solving the equation ΔV = 0, where V is the voltage applied between the conductor and the screen.

E _r can be written as :

r E _r = A

where A is a constant that can be calculated by :

$- \int_{r_{1}}^{r_{2}} E_{r} d r = V$

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