Electrical field coefficient of insulation material

Electrical field strength coefficient (or coefficient of variation on the electric field) of the specific direct current conductivity of insulation material. Often the symbol $\beta$ is used.

Symbol

$\gamma_i$

Unit

mm/kV

Related

$\alpha_i$

Temperature coefficient of conductivity of insulation material [1/K]

$\kappa_i$

Electrical conductivity of insulation material at 0°C [S/m]

$M_i$

Material of insulation

Used in

$\delta_i$

Electrical thickness of insulation material [m]

$\Delta w_d$

Increment of volumetric density of dielectric losses in HVDC cables [W/m$^3$]

$\kappa_i$

Electrical conductivity of insulation material at 0°C [S/m]

$w_d$

Volumetric density of dielectric losses [W/m$^3$]

Choices

Material	Value	Reference
PE	0.121	HanyuYe2011 (MDPE type B)
HDPE	0.121	HanyuYe2011 (MDPE type B)
XLPE	0.032	Diban2020 (XLPE low)
XLPEf	0.0645	Diban2020 (XLPE medium)
PVC	0.05	none
EPR	0.05	none
IIR	0.05	none
PPLP	0.08	Jeroense1997
Mass	0.03	Jeroense1997
OilP	0.08	Jeroense1997)
PP	0.03	none
SiR	0.05	none
EVA	0.05	none
XHF	0.05	none