System and a protection and remote power-feeding device for equipment connected by two transformers to a four-wire transmission link
US4953055A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 9, 1988 |
| Grant date | Aug 28, 1990 |
| Priority date | — |
| Expiry date | Sep 9, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M19/08
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.