Effect of water in insulating oil on conduction phenomena under high electrical field

The conductivity of dielectric liquids including and not including the water dimer were measured under DC electrical fields up to 100 [kV/cm], and the properties of the conductivity of the two kinds of dielectric liquids compared. The results show that the conductivity of liquid paraffin which includes only free water depends on Ohm´s law, but the conductivity of di-octyl-phthalate (DOP) which includes a bound dimer water does not depend on Ohm´s law. The conductivity decreases and increases again according to electrical field. Since the strength of the electrical field at which the relationship changes decreases according to the amount of water in DOP, it seems that the bound water dimer does not effect ion conduction phenomena like free water, but effects the transport of electrons in hopping theory