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

摘要

The protection and remote-powering system and the remote-powering extractor protection device are intended for equipment connected by two transformers (9, 10) to a transmission link (1) with two pairs of wires ensuring remote-powering of the equipment serviced. …??Each transformer is joined to the two wires of a pair (2 or 3) by two identical windings (13, 14 or 15, 16) connected in series between these two wires across a capacitor (15 or 18). The two pairs of wires constitute a phantom power circuit, the two wires of one pair being connected to the same terminal of a DC generator (27). …??The protection and extraction device comprises two rectifier bridges (28, 29) each connected separately by their inputs to a pair of wires, and interconnected by their outputs in order to provide the remote-powering. …IMAGE…