Possibilities of Electrical Networks Insulation Diagnose by Non-Symmetrical Situations Analysis

The damage of the electrical networks insulation is manifested thru low currents. The symmetric components values are influenced by those currents, mostly zero sequence symmetric components. The effects can be characterized by the values of symmetric components active power. This paper contains a study that shows the link between the state of electrical networks insulation and symmetric component values, in non-symmetrical situation. Further evolution ofthose values is important.