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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 :
where A is a constant that can be calculated by :
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Main electrical characteristics
Cable carrying capacity
