Power feed circuit for use in a submarine cable branching unit
US5644466A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 17, 1995 |
| Grant date | Jul 1, 1997 |
| Priority date | — |
| Expiry date | Jan 17, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B3/44
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A submarine cable branching system includes a plurality of directional relays in respective power feed paths branched at a common node, each of the directional relays being energized by a current flowing through the power feed path in a predetermined direction for energizing a corresponding switch provided in a different power feed path to establish a bilateral feed path and further a unilateral feed path, wherein there is provided a bypassing switch across one of the switches that forms the bilateral feed path, such that the bypassing switch is urged to close in response to energization of a self-sustaining relay provided in the unilateral feed path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.