High-frequency barriers of VZ series are designed for attenuation of shunt action of equipment, substation busbars and branches from overhead lines on signals of emergency automation, relay protection, telephone communication and telemechanics, transmitted through phase wires of high-voltage6 - 1150 kV power lines.HF barriers are barrier filters, which are included in the phase wire section, and can be tuned to certain barrier bands from the range of 16 - 1000 kHz.In the case of organisation of HF communication channels on isolated lightning protection cables HF barriers serve for grounding of cables on industrial frequency in the places of connection.ConstructionThe main components of high-frequency barrier design:barrier reactor (BR) - inductance coil, designed to pass the current of industrial frequency, flowing through the line wire, in which the BR is switched on;protective device (PD), designed to protect the reactor and the tuning element from
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