Stress Cone Effect Analysis and Optimum Design of Extra High-Voltage Cable Joint Using Neural Networks

Table 2

Material parameters for 500 kV EHV cable joint [26].

Material	Relative permittivity	Conductivity (S/m)
Cable core	1	5.7 × 10^7
Semiconductive stress cone	50	10
XLPE	2.3	10^–15
Nonlinear material	4.3	σ = f(E)
EPDM	2.6	10^–15
Semiconducting middle electrode	50	10