Source google image: https://www.researchgate.net/profile/Christian_Laurent/publication/261567329/figure/fig2/AS:614003285975061@1523401199397/Electric-field-distribution-in-model-cable-stressed-under-40-kV-and-80-kV-at-room.png
Schema electrique cable coaxial
Source google image: https://www.researchgate.net/profile/Christian_Laurent/publication/261567329/figure/fig2/AS:614003285975061@1523401199397/Electric-field-distribution-in-model-cable-stressed-under-40-kV-and-80-kV-at-room.png