PROTECTION DEVICE AGAINST SHORT CIRCUITS IN DEAD ZONE OF OPEN DISTRIBUTING DEVICES OF ELECTRIC POWER ENGINEERING SITES OF HIGH OR ULTRAHIGH VOLTAGE - IN SECTIONS BETWEEN CURRENT TRANSFORMERS AND SWITCHES Russian patent published in 2014 - IPC H02H3/28 H02H7/22 

FIELD: electricity.

SUBSTANCE: on a potential of high or ultrahigh voltage for each phase there are two transmitting modules installed on ends of the protected section and connected between themselves with a fibre-optic communication line. On the earth potential there is a retransmission module connected by means of radio channels to both transmitting modules and connected by means of a fibre-optic communication line to a combined control station. Each of the transmitting modules includes a power supply unit, a measuring converter, a modem, a comparison unit and a radio transmitter. The retransmission module is common for transmitting modules of all the phases of the protected section.

EFFECT: simplifying the device and improving its reliability.

11 cl, 1 dwg