System and a protection and remote power-feeding device for equi

Details System and a protection and remote power-feeding device for equi System and a protection and remote power-feeding device for equi

1988-09-09

1990-08-28

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Feeder protection in distribution networks

361119, 379250, 379412, H02H 100

Patent

active

049530550

ABSTRACT:
A remote power-feeding and protection system for equipment connected by two transformers to a four-wire transmission link.
The remote power-feeding and protection system and the remote power-feeding extractor protection device are intended for equipment connected by two transformers to a transmission link with two pairs of wires ensuring remote power-feeding of the fed equipment.
Each transformer is connected to the two wires of one pair by two identical windings serially-connected between these two wires through a capacitor. The two pairs of wires constitute a phantom feed circuit, the two wires of a given pair being connected to the same terminal of a D.C. generator. The extraction and protection device comprises two rectifier bridges each separately connected by their inputs to a pair of wires and interconnected by their outputs in order to provide remote power feeding.

REFERENCES:
patent: 3673335 (1972-06-01), Joel, Jr.
patent: 4480152 (1984-10-01), Cardot et al.
patent: 4837671 (1989-06-01), Wild et al.
"Integrated Services Digital Network Interfaces", Section 3 of CCITT Bluebook, pp. 171-212, no date.
"A Monolothic Digital Line Interface Circuit", published at 1980 ISSCC.

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