FIELD: electrical engineering; organizing communication channels in power transmission line without using line traps. SUBSTANCE: 0.38- , 10-, 35-, or 110-kV lines may be used for the purpose. Method involves use of pulse- code-modulation-phase modulation system with integration at typical points which are moments when supply voltage crosses zero. Device implementing this method has two passive-active transmitters, three-phase rectifier bridge, resistor, capacitor, transformer, two narrow- band filters, two multipliers, two low-frequency filters, two integrators, two local oscillators, inverter, two synchronizers, and two generators. EFFECT: improved noise immunity in signal reception. 1 dwg
