FIELD: electrical engineering. SUBSTANCE: invention can find use for organization of communication channels with employment of 0.38, 10.0, 35.0 and 100.0 kV lines without its treatment with high-voltage line traps. Proposed system employs synchronous detection of signals with usage of integration whose start and finish are defined by characteristic marks which present time moments of transition of common supply voltage through zero in one of phases of network at points of reception and transmission. Technical result of invention consists in increase of noise immunity and transmission rate from 50 to 100 baud. EFFECT: increased noise immunity and transmission rate. 1 cl, 1 dwg
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