Table 2 Electric conductivity σ and... | Emerald Publishing

Table 2

Electric conductivity σ and dielectric constant εr of oil and various contaminants

Medium	σ [S/m]	ε_r [–]
Air	0.3 to 0.8 ·10^–14	1.0006
HM and HLP oils	3 to 10 ·10^–10	2.0 to 2.2
Water	0.005 to 0.05	80
Copper	5.7 ·10⁷	6.0 to 6.2