FIELD: electricity.
SUBSTANCE: in three-phase alternating current substation comprising two busbar sections, each of which is connected via a switching device to an electrical transmission line (ETL) and outgoing transmission lines (ETL), as well as a jumper connected via two switches to the busbar sections, and measuring devices and relay protection installed in ETL circuits, a device with a threshold voltage-current characteristic connected between the jumper and ground is installed, with the first section of the busbars feeding electrical power line and is connected to a circuit with isolated neutral, and the second section busbar other supply line is connected to a circuit with a resistor ground neutral. As a device with a threshold volt-ampere characteristic, a triggered-vacuum gap (TVG) with a control unit is used.
EFFECT: provision of mutual redundancy of power supply to busbar sections when feeding one of the sections from a network with isolated neutral, and the other - from circuit with a resistor-grounded neutral.
2 cl, 1 dwg
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