SYSTEM AND DEVICE FOR PROTECTION AND TELE-POWER SUPPLY FOR EQUIPMENT CONNECTED BY TWO TRANSFORMERS TO A FOUR-WIRE TRANSMISSION LINK

摘要

P The protection and remote power supply system and the remotely powered extractor protection device are intended for equipment connected by two transformers 9, 10 to a transmission link 1 with two pairs of wires for remote power supply of the equipment served. / P P Each transformer is connected to the two son of a pair 2 or 3 by two identical windings 13, 14 or 15, 16 connected in series between these two son through a capacitor 15 or 18. The two pairs of wires constitute a phantom power circuit, the two wires of the same pair being connected to the same terminal of a direct current generator 27. / P P The protection and extraction device comprises two rectifier bridges 28, 29 separately connected by their inputs each to a pair of wires and interconnected by their outputs to provide remote power supply. / P