High-polymer tapes impregnated with oil as a dielectric for extra-high-voltage cables

The experimental results described above indicate that if somewhere in the liquid phase breakdown conditions are present, the cable insulation will break down. Hence, it can be concluded that for the most desirable extra-high-voltage cable construction, the following material properties are needed to fulfill requirement 1 of the introduction: 1. Use an electrically strong liquid. 2. Use plastics with ε₁ ≈ ε_s. 3. Use thin tapes to decrease the height of the liquid gap.