In the case of normal power cable, the metal shielding layer can improve the electric field distribution through the short-circuit current through the capacitor current, and the electric field can be improved through the semi conductive shield.

The semi conductive shielding bag can have the effect of limiting the external electromagnetic field to the inside, and the electromagnetic field shielding caused by the electric cable is shielded in the insulated wire core to reduce the electromagnetic interference generated by the external electromagnetic field. At the same time, the electric field can be changed to prevent the axial discharge. Because the semi conductive layer has a certain resistance, when the metal shielding layer is grounded, the cable along the surface discharge is caused by the uneven distribution of the electric potential in the axial direction of the cable.

It can be known that the cable can improve the electric field distribution through the semi conductive shield, which is a very effective measure.