DEVICE TO TRANSMIT AND RECEIVE SIGNALS IN THREE-PHASE ELECTRICAL NETWORK Russian patent published in 2000 - IPC

FIELD: electrical engineering. SUBSTANCE: invention can find application in organization of communication channels with use of 0.38-10.0- 35.0-110.0 kV power lines without their processing with high-frequency rejection filters. Proposed device uses synchronous detection of signals with employment of integration whose start and finish are determined by characteristic points which are common moments of time of transition of common supply voltage through zero in one of phases of network in transmission and reception points. Technical objective of invention is rise of noise immunity and expansion of frequency range from 1 to 3 kHz. EFFECT: rise of noise immunity and expansion of frequency range. 1 dwg