FIELD: electrical engineering.
SUBSTANCE: invention relates to the field of electrical engineering, in particular to automation of electric networks. In disclosed disconnection method voltages at the substation input are measured; according to the invention voltage is measured at the input of low voltage of the power transformer of the transformer substation on both sides from the input switching device on the low side of the transformer substation, disappearance of voltage on both sides from input switching device is fixed, input switching device is disconnected, thereby blocking possibility of reverse transformation, availability of voltage at input of low voltage of power transformer of transformer substation on both sides from input switching device from low side of transformer substation, and if it appears on the side of outgoing low-voltage power transmission lines without its on the side of power transformer, then fact of unauthorized supply of voltage from low side of transformer substation is recorded and in this case signaling of unauthorized supply of voltage by means of transmission of information to dispatching office of electric network organization and display of information in place.
EFFECT: technical result consists in improvement of safety of electrical networks servicing.
1 cl, 1 dwg
