Medium voltage cable shielding and grounding

The authors describe the purposes of the shields (conductor shield, insulation shield, and metal shield) in medium-voltage cables. Shield losses, shield grounding, and shield terminations are also discussed. It is noted that, in essence, the conductor shield is an electrical extension of the conductor and the insulation shield is an electrical extension of the outer metal shield; together they ensure that all the voltage is insulated from the outer surface of the conductor shield to the inner surface of the insulation shield (i.e. within the insulation).<>